期刊文献+
共找到50篇文章
< 1 2 3 >
每页显示 20 50 100
Comparison of Net Photosynthetic Rate in Leaves of Soybean with Different Yield Levels 被引量:7
1
作者 Li Da-yong Zhang Zhi-an +2 位作者 Zheng Dian-jun Jiang Li-yan Wang Yuan-li 《Journal of Northeast Agricultural University(English Edition)》 CAS 2012年第3期14-19,共6页
A total of nine soybean (Glycine max (L.) Merr.) cultivars were divided into three yield levels which were planted under the same environmental condition. The net photosynthetic rate was measured by LI-6400 portab... A total of nine soybean (Glycine max (L.) Merr.) cultivars were divided into three yield levels which were planted under the same environmental condition. The net photosynthetic rate was measured by LI-6400 portable photosynthesis system. The chlorophyll content and specific leaf weight were measured with regular methods. The results showed that the specific leaf weight, chlorophyll content and net photosynthetic rate of high yield varieties were higher than those of low yield varieties. The yield had a significantly positive correlation with the net photosynthetic rate. With the improvement of modem technology, the net photosynthetic rate could be measured quickly and exactly. Hence, net photosynthetic rate could be used as an effective index in the selection of high yield soybean. 展开更多
关键词 SOYBEAN YIELD net photosynthetic rate specific leaf weight chlorophyll content
下载PDF
Relationship Between Diurnal Changes of Net Photosynthetic Rate and Influencing Factors in Rice under Saline Sodic Stress 被引量:3
2
作者 YANG Fu LIANG Zheng-wei +1 位作者 WANG Zhi-chun CHEN Yuan 《Rice science》 SCIE 2008年第2期119-124,共6页
The net photosynthetic rate of flag leaves and influencing factors under saline sodic soil conditions were investigated at the full heading stage of rice. The net photosynthetic rate of rice leaves showed a double-pea... The net photosynthetic rate of flag leaves and influencing factors under saline sodic soil conditions were investigated at the full heading stage of rice. The net photosynthetic rate of rice leaves showed a double-peak curve in a day in both non-saline sodic and saline sodic soil treatments. The first peak of the net photosynthetic rate appeared at 9:00-10:00 and 9:00 in the saline sodic and non-saline sodic soil treatments, respectively, whereas the second peak both at 14:00. The midday depression of the net photosynthetic rate always appeared regardless of non-saline sodic or saline sodic soil conditions. In addition, the net photosynthetic rate significantly decreased in all day under saline sodic conditions compared with that under non-saline sodic conditions. Some differences were observed in correlation characters between the net photosynthetic rate and all influencing factors during 9:00-13:00. Under non-saline sodic conditions, the diurnal changes of the net photosynthetic rate in a day were mainly caused by stomatal conductance, and the limitation value and the stomatal factors served as determinants; whereas under saline sodic stress, the diurnal changes of the net photosynthetic rate in a day were mainly caused by non stomatal factors including light intensity and air temperature. 展开更多
关键词 RICE saline sodic stress diurnal changes net photosynthetic rate influencing factors RELATIONSHIP
下载PDF
Effects of elevated CO_2 on net photosynthetic rate of trees in Changbai Mountain 被引量:1
3
作者 王琛瑞 韩士杰 《Journal of Forestry Research》 SCIE CAS CSCD 1999年第4期211-213,共3页
Net photosynthetic rates (NPRs) of four species seedlings, Pinus koraiensis, Ptrius Syvestriformis,Fraxinus mandshuthe and Phellodendron amurense, were measured at different CO2 concentrations and time respectively in... Net photosynthetic rates (NPRs) of four species seedlings, Pinus koraiensis, Ptrius Syvestriformis,Fraxinus mandshuthe and Phellodendron amurense, were measured at different CO2 concentrations and time respectively in Changbai Mountain during the growing season in 1999. The seedlings were cultivated in open-top chambers (OTCs), located outdoors and exposed to natural sunlight. The experimental objects were divided into four groups by tree species. CO2 concentrations in chambers were kept at 500 μL-L-1 and 700 μL-L-1 and contrast chamber and contrast field were set. The results showed that the effects of elevated CO2 on NPR of the trees strongly depended on tree species and time. NPRs of Pin us koreaipsis and Pinus syvestriformis seedfings increased with the rising of CO2 concentration, while that of Phellodron amurense and haus mandshurica increased at some time and decreased at another time. 展开更多
关键词 Elevated CO_2 net photosynthetic rate Trees Changbai Mountain
下载PDF
Diurnal changes in net photosynthetic rate of Pueraria lobataand its impact factors 被引量:1
4
作者 DING You-fang WANG Cai-yun +5 位作者 Neo C MOKGOLODI ZHANG Xiao-xia SHI Ling-ling ZHANG Yun-wei YANG Fu-yu LIU Yu-jun 《Forestry Studies in China》 CAS 2011年第1期57-63,共7页
In order to identify the relationship between diurnal changes in the net photosynthetic rate(Pn) of Pueraria lobata and environmental factors,diurnal changes in the Pn of leaves of two P.lobata cultivars were measur... In order to identify the relationship between diurnal changes in the net photosynthetic rate(Pn) of Pueraria lobata and environmental factors,diurnal changes in the Pn of leaves of two P.lobata cultivars were measured using a CIRAS-1 portable photosynthesis measurement system(PP-Systems,UK).The results show that diurnal changes in Pn of both cultivars could be interpreted as double-peak curves,indicating the occurrence of an obvious midday depression.Further analyses indicate that the correlation between Pn and stomatal conductance was positive and extremely significant(p 〈 0.01).The correlations of Pn with intercellular CO2 concentration and transpiration rate were positive and significant(p 〈 0.05),while the correlations of Pn with air and leaf temperatures were negative and significant(p 〈 0.05).The results indicate that among the factors affecting photosynthetic properties,some can be grouped as stomatal limitations while others are non-stomatal limitations. 展开更多
关键词 Pueraria lobata net photosynthetic rate (Pn) diumal change environmental factors
下载PDF
Relationship Between Net Photosynthetic Rate of Cassava SC205 and Its Physio-ecological Factors
5
作者 Yong SONG Xuan LIN +2 位作者 Jinhui YANG Yuping DENG Xingyao XIONG 《Agricultural Science & Technology》 CAS 2014年第2期243-247,共5页
[Objective]The aim was to measure photosynthetic characters of SC 205, a cassava cultivar, and explore the relationships of the net photosynthetic rate (Pn) with physiological and ecological factors. [Method] The di... [Objective]The aim was to measure photosynthetic characters of SC 205, a cassava cultivar, and explore the relationships of the net photosynthetic rate (Pn) with physiological and ecological factors. [Method] The diurnal variations of photosyn-thesis in leaves of SC205 were studied by LICOR-6400 portable photosynthesis system, and the relationships of the net photosynthetic rate (Pn) with physiological and ecological factors were studied by simple correlation analysis and path analysis. [Result] The curve of diurnal variation of Pn showed single peak at 10:00 am at 24.07 μ mol CO2 m2/s, without showing midday depression; the diurnal changes of stomatal conductance (Gs), transpiration rate (Tr), leaf temperature (Tl), air tempera-ture (Ta) and photosynthetic active radiation (PAR) al showed single peak curves, and there were positive relationships of Pn with Gs, Tr, Tl, Ta and PAR. The diur-nal variations of intercellular CO2 concentration (Ci), atmospheric CO2 concentration (Ca), relative humidity (RH) showed in a U-shape curve. There were highly signifi-cant positive correlation of Pn with Gs and PAR; the diurnal variation of Pn had highly significant negative correlations with Ci and Ca. The direct impact of physio-logical factors on Pn was as fol ows: Ci&gt;Gs&gt;Tl&gt;Tr, and the direct impact of ecologi-cal factors was RH&gt;PAR&gt;Ca&gt;Ta. [Conclusion] The research showed that Ci, Gs and Tr play very important roles in the changes of Pn among the physiological fac-tors, and PAR and Ca affect the changes of Pn among the ecological factors. 展开更多
关键词 SC205 net photosynthetic rate Diurnal variation Physiological factors Ecological factors
下载PDF
Effect of Water Deficit Stress on Photosynthetic Characteristics of Jatropha curcas
6
作者 Kesego Makholwa Baleseng Moseki Goitseone Malambane 《American Journal of Plant Sciences》 CAS 2023年第1期104-112,共9页
The need to mitigate climate change cannot be more emphasized, which arises, as a result of increases in CO<sub>2</sub> emissions due to anthropogenic activities. Given the current world energy problems of... The need to mitigate climate change cannot be more emphasized, which arises, as a result of increases in CO<sub>2</sub> emissions due to anthropogenic activities. Given the current world energy problems of high fossil fuel consumption which plays a pivotal role in the greenhouse effect, Jatropha curcas biodiesel has been considered a potential alternative source of clean energy (biodiesel is carbon neutral). However, the ability of Jatropha curcas, as a candidate source of alternative of clean energy, to grow in marginal and dry soils, has been poorly elucidated. This study, therefore aimed at investigating whether Jatropha curcas leaves could switch from carrying out C<sub>3</sub> photosynthetic pathway to Crassulacean Acid Metabolism (CAM) as a strategy to improve its water deficit tolerance. Thirty-five-day-old Jatropha curcas accessions, from three different climatic zones of Botswana, viz., Mmadinare (Central zone), Thamaga (Southern zone) and Maun (Northern zone), were subjected to water stress, by with-holding irrigation with half-strength Hoagland culture solution. Net photosynthetic rate, transpiration and stomatal conductance were measured at weekly intervals. The leaf pH was measured to determine whether there was a decrease in pH (leaf acidification) of the leaves during the night, when the plants experienced water deficit stress. All the accessions exhibited marked reduction in all the measured photosynthetic characteristics when experience water deficit stress. However, a measurable CO<sub>2</sub> uptake was carried out by leaves of all the accessions, in the wake of marked decreases in stomatal conductance. There is evidence to suggest that when exposed to water stress J. curcas accessions switch from C<sub>3</sub> mode of photosynthesis to CAM photosynthetic pathway. This is attested to by the slightly low leaf pH at night. Thamaga accession exhibited an earlier stomatal closure than the other two accessions. This resulted in Thamaga accession displaying a slightly lower dry weight than both Mmadinare and Maun accessions. It could be concluded that Jatropha curcas appeared to tolerate water deficit stress due to its ability of switching from C<sub>3</sub> photosynthetic pathway to the CAM photosynthetic pathway, but with a cost to biomass accumulation, as demonstrated by slightly more reduced CO<sub>2</sub> assimilation by Thamaga accession, than the other two accessions. 展开更多
关键词 Jatropha curcas BIODIESEL Crassulacean Acid Metabolism net photosynthetic Rate Stomatal Conductance
下载PDF
Photosynthetic Characteristics of Two Superhigh-yield Hybrid Rice 被引量:13
7
作者 王强 张其德 +5 位作者 蒋高明 卢从明 匡廷云 吴爽 李成荃 焦德茂 《Acta Botanica Sinica》 CSCD 2000年第12期1285-1288,共4页
The photosynthetic functions and the sensitivity to photoinhibition were compared between two superhigh_yield hybrid rice (Oryza sativa L.) Liangyoupeijiu and X07S/Zihui 100, the newly developed from two parental line... The photosynthetic functions and the sensitivity to photoinhibition were compared between two superhigh_yield hybrid rice (Oryza sativa L.) Liangyoupeijiu and X07S/Zihui 100, the newly developed from two parental lines and traditional hybrid rice Shanyou 63 developed from three parental lines. The results showed that, as compared to Shanyou 63, the net photosynthetic rate of Liangyoupeijiu and X07S/Zihui 100 was 9.1% and 11.9% higher, the transpiration rate was 37.4% and 31.4% lower, and their water use efficiency was 74.2% and 63.5% higher respectively. After strong light (2 000 μmol photons·m -2 ·s -1 ) treatment for 2 h, the photochemical quantum yield and the photochemical quenching increased by 37.0% and 18.0% respectively in Liangyoupeijiu, 28.3% and 46.2% in X07S/Zihui 100, but decreased a little in Shanyou 63. The non_photochemical quenching decreased in Liangyoupeijiu and X07S/Zihui 100 (about 50%) but increased greatly in Shanyou 63 (about 50%). Better photosynthetic functions, higher water use efficiency and stronger resistance to photoinhibition, may be the physiological basis for the super high_yield of the two hybrid rice under study. 展开更多
关键词 superhigh-yield hybrid rice net photosynthetic rate water use efficiency PHOTOINHIBITION fluorescence induction kinetics parameters
下载PDF
Seasonal Changes in Photosynthetic Characteristics of Ammopiptanthus mongolicus 被引量:43
8
作者 李文瑞 冯金朝 +2 位作者 江天然 张立新 刘新民 《Acta Botanica Sinica》 CSCD 1999年第2期190-193,共4页
Seasonal changes in the photosynthetic characteristics of Ammopiptantus mongolicus (Maxim. )Chen f. were studied. When the net photosynthetic rate decreased with the elevation of air temperature, thestomatal conductan... Seasonal changes in the photosynthetic characteristics of Ammopiptantus mongolicus (Maxim. )Chen f. were studied. When the net photosynthetic rate decreased with the elevation of air temperature, thestomatal conductance and stomatal limitation value tended to decline simultaneously, while the interoellularCO2 concentration was increased. According to the two criteria discriminating the stomatal limitation of Photosynthesis suggeSted by Fmrquhar and Sharkey, the seasonal changes in these parameters indicated that the decrease in Pn may not be due to stomatal factor. These studies proved that the relative contents of the large subunit of Rubisco and the photochemical activities correlated with the seasonal changes in the net photosyntheticrate, whieh may show that these two factors contribute primarily to the seasonal changeS in CO2 assimilation. 展开更多
关键词 net photosynthetic rate Stomatal conductance Intercellular CO2 concentration Stomatal limitation value RUBISCO Electron transport activity
下载PDF
Effect of Heat Stress on Photosynthetic Characteristics of Different Green Organs of Winter Wheat During Grain-filling Stage 被引量:28
9
作者 徐晓玲 王志敏 张俊平 《Acta Botanica Sinica》 CSCD 2001年第6期571-577,共7页
Four winter wheat (Triticum aestivum L.) varieties ('JD 8', 'Jing 411','Centurk' and 'Tam 202') were used to study the effect of heat stress on photosynthetic characteristics of flag le... Four winter wheat (Triticum aestivum L.) varieties ('JD 8', 'Jing 411','Centurk' and 'Tam 202') were used to study the effect of heat stress on photosynthetic characteristics of flag leaf blade, nag leaf sheath, peduncle, glume, lemma and awn during grain-filling stage. The results showed that heat acclimation during grain-filling stage increased thermotolerance of wheat with significant differences among different green organs. During heat stress, the decreases of the efficiency of primary light energy conversion (F-v/F-m) of PS II and pigment (chlorophyll and carotenoid) content were much slower in peduncle, flag leaf sheath and glume than in nag leaf blade, lemma and ann; and the percentage of decrease in net photosynthetic rate (P-n) of ear was lower than that of the nag leaf blade. The measured photosynthetic parameters (F-v/F-m, P-n and pigment content) of 'JD 8', a relatively heat tolerant variety, declined more slowly than those of the other three varieties during the whole heat stress period. 展开更多
关键词 winter wheat net photosynthetic rate chlorophyll fluorescence kinetics parameters heat tolerance
下载PDF
Leaf Photosynthetic Rate and Related Influencing Factors in Super High-yield Combination C Liangyou H255 被引量:8
10
作者 贺安娜 吴厚雄 +2 位作者 蒋向辉 何超 徐良骏 《Agricultural Science & Technology》 CAS 2008年第2期23-25,29,共4页
[ Objective] Study on the photosynthesis and influencing factors in super high-yield combination C Liangyou H255. [ Method] The photosynthetic characteristies were measured at a hot and muggy day under natural conditi... [ Objective] Study on the photosynthesis and influencing factors in super high-yield combination C Liangyou H255. [ Method] The photosynthetic characteristies were measured at a hot and muggy day under natural conditions. [ Result] A respective single peak at 11:30 was observed in diurnal variation curves of net photosynthetic rate (Pn) and transpiration rate(Tr). Correlation analysis shows that Pn presents an extremely significant correlation with photon flux densities (PFD) of photosynthetically active radiation, in comparison assumes a significant correlation either with stomatal conductance (Gs) or with ambient CO2 concentration (Ca). [ Conclusion] Gs followed by PFD presented most influence on Pn of super high-yield combination C Liangyou H255. 展开更多
关键词 net photosynthetic rate Diurnal variation Correlation analysis Path analysis
下载PDF
Study on the Daily Change of Photosynthetic Rate for Prunus domestica × armeniacain Different Seasons 被引量:3
11
作者 李雯雯 冯贝贝 +5 位作者 魏雅君 牛莹莹 徐业勇 王明 杨红丽 廖康 《Agricultural Science & Technology》 CAS 2016年第4期838-844,941,共8页
[Objective] The aim of this study was to explore the daily change of photosyntheticratefor Prunus domestica ×armeniacain different growing seasons. The study can provide theoretical basis for arid area high yield... [Objective] The aim of this study was to explore the daily change of photosyntheticratefor Prunus domestica ×armeniacain different growing seasons. The study can provide theoretical basis for arid area high yield and quality cultivation.[Method] The photosynthetic physiological properties of leaves of different types of Prunus domestica × armeniaca were measured by the Li-6400 portable photosynthesis system indifferent seasons. By this method could analysis of photosyntheticcharacteristicsfor different types of Prunus domestica×armeniaca in different seasons.[Result] Daily change of photosyntheticrate(Pn) for Prunus domestica×armeniaca in differentseasons showed a "double-peak" curve. The peak values were at 10:00 and16:00. The Pn of ‘Fengweihuanghou', ‘Konglongdan', ‘Weihou', ‘Weiwang' and‘Weidi' reached the maximum in July, theywere 13.75, 14.76, 12.96, 13.3, and 11.9μmol/(m^2·s), respectively. The Pn of Prunus domestica×armeniaca reached minimumin August, they were 9.78, 10.71, 12.02, 10.43 μmol/(m^2·s). The Pn overall average of ‘Konglongdan' was highest,it reached 12.65 μmol/(m^2·s).The Pn overall average of ‘Weiwang' was lowest, it reached 11.31μmol/(m^2·s). There were extremely significant positive correlation between the Pn and Gs(P0.01). [Conclusion] Daily change of photosyntheticrate for Prunus domestica ×armeniaca in differentseasons showed a "double-peak" curve, showing significant phenomenon of "midday depression".The photosynthesis intensity of Prunus domestica ×armeniaca was strongest in July, and the photosynthesis intensity was weakest in August. ‘Konglongdan'showed the strongest photosynthesis capacity, ‘Weihou' and ‘Weiwang', followed.There were highest correlation between the Pn and stoma conductance(Gs). 展开更多
关键词 Prunus domestica × armeniaca net photosynthetic rate Daily change of photosynthetic rate Environmental factors
下载PDF
Studies on Photosynthetic Characteristics of Tomato Leaves after Inoculation with Tomato Powdery Mildew (Oidium neolycopersici) 被引量:1
12
作者 吴昊 董华芳 许延波 《Plant Diseases and Pests》 CAS 2011年第2期9-11,21,共4页
[ Objective ] The paper was to explore the pathogenic mechanism of tomato powdery mildew, and to study the effects of the disease on photosynthetic characteristics of tomato. [ Method ] With four tomato varieties as m... [ Objective ] The paper was to explore the pathogenic mechanism of tomato powdery mildew, and to study the effects of the disease on photosynthetic characteristics of tomato. [ Method ] With four tomato varieties as materials, the pathogen of tomato powdery mildew was artificially inoculated. After the varieties were infected, the parameters including net photosynthetic rate, stomatal conductance and transpiration rate of tomato leaf were measured by Li-6400 portable photo- synthesis detector under natural lighting conditions. [ Result] The net photosynthetic rate, stomatal conductance and transpiration rate of four tomato varieties all decreased after infection. However, the decrease extent of these parameters of four varieties was different. The parameters of seriously damaged Jinyangdajuxdng ( No. 4) and Xinsheng No. 1 ( No. 5 ) decreased greatly, while the parameters of slightly damaged Lujia ( No. 13 ) and improved 98-6 decreased lightly. [ Condu- sion] The results could provide theoretical basis for the study on pathogenic mechanism, new prevention way and resistance breeding of tomato powdery mildew. 展开更多
关键词 Tomato powdery mildew net photosynthetic rate Stomatal conductance Transpiration rate
下载PDF
Effects of nitrogen application rates and irrigation regimes on grain yield and water use efficiency of maize under alternate partial rootzone irrigation 被引量:9
13
作者 QI Dong-liang HU Tian-tian SONG Xue 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2020年第11期2792-2806,共15页
Faced with the scarcity of water resources and irrational fertilizer use,it is critical to supply plants with water and fertilizer in a coordinated pattern to improve yield with high water use efficiency(WUE).One such... Faced with the scarcity of water resources and irrational fertilizer use,it is critical to supply plants with water and fertilizer in a coordinated pattern to improve yield with high water use efficiency(WUE).One such method,alternate partial root-zone irrigation(APRI),has been practiced worldwide,but there is limited information on the performance of different irrigation regimes and nitrogen(N)rates under APRI.The objectives of this study were to investigate the effects of varying irrigation regimes and N rates on shoot growth,grain yield and WUE of maize(Zea mays L.)grown under APRI in the Hexi Corridor area of Northwest China in 2014 and 2015.The three N rates were 100,200 and 300 kg N ha–1,designated N1,N2 and N3,respectively.The three irrigation regimes of 45–50%,60–65%and 75–80%field capacity(FC)throughout the maize growing season,designated W1,W2 and W3,respectively,were applied in combination with each N rate.The results showed that W2 and W3 significantly increased the plant height,stem diameter,crop growth rate,chlorophyll SPAD value,net photosynthetic rate(Pn),biomass,grain yield,ears per ha,kernels per cob,1000-kernel weight,harvest index,evapotranspiration and leaf area index(LAI)compared to W1 at each N rate.The N2 and N3 treatments increased those parameters compared to N1 in each irrigation treatment.Increasing the N rate from the N2 to N3 resulted in increased biomass and grain yield under W3 while it had no impact on those under the W1 and W2 treatments.The W3 N3 and W2 N2 and W2 N3 treatments achieved the greatest and the second-greatest biomass and grain yield,respectively.Increasing the N rate significantly enhanced the maximum LAI(LAI at the silking stage)and Pn under W3,suggesting that the interaction of irrigation and fertilizer N management can effectively improve leaf growth and development,and consequently provide high biomass and grain yield of maize.The W2 N2,W2 N3 and W3 N3 treatments attained the greatest WUE among all the treatments.Thus,either 60–65%FC coupled with 200–300 kg N ha–1 or 75–80%FC coupled with 300 kg N ha–1 is proposed as a better pattern of irrigation and nitrogen application with positive regulative effects on grain yield and WUE of maize under APRI in the Hexi Corridor area of Northwest China and other regions with similar environments.These results can provide a basis for indepth understanding of the mechanisms of grain yield and WUE to supply levels of water and nitrogen. 展开更多
关键词 deficit irrigation nitrogen fertilization leaf area index net photosynthetic rate harvest index Zea mays
下载PDF
Nitrogen in Relation to Photosynthetic Capacity and Accumulation of Osmoprotectant and Nutrients in Brassica Genotypes Grown Under Salt Stress 被引量:14
14
作者 Manzer H Siddiqui Firoz Mohammad +2 位作者 M Nasir Khan Mohamed H Al-Whaibi Ali H A Bahkali 《Agricultural Sciences in China》 CSCD 2010年第5期671-680,共10页
Different strategies of the application of nutrients are required to overcome the adverse effects of mustard (Brassica juncea L.) in response to NaCl stress. The objective of the present study was to determine if di... Different strategies of the application of nutrients are required to overcome the adverse effects of mustard (Brassica juncea L.) in response to NaCl stress. The objective of the present study was to determine if different added levels of nitrogen (N) in growth medium could alleviate the adverse effects of salt stress on photosynthetic capacity and accumulation of osmoprotectants and nutrients. 14 days mustard seedlings of salt-sensitive (cv. Chuutki) and salt-tolerant (cv. Radha) genotypes were fed with: (i) 0 mmol L^-1 NaCl + 0 mg N kg^-1 sand (control), (ii) 90 mmol L^-1 NaCl + 30 mg N kg^-1 sand, (iii) 90 mmol L^-1 NaCl +60 mg N kg^-1 sand, (iv) 90 mmol L^-1 NaCl +90 mg N kg^-1 sand and (v) 90 mmol L^-1NaCl+ 120 mg N kg^-1 sand. Under the condition of salinity stress, N application caused a significant ameliorative effect on both genotypes with respect to growth attributes [fresh weight (FW) and dry weight (DW)] and physio-biochemical parameters [percent water content (WC), net photosynthetic rate (PN), stomatal conductance (gs), total chlorophyll (Ch1), carbonic anhydrase (CA) activity and malondialdehyde (MDA), nitrogen (N), potassium (K) and sodium (Na) contents, and K/Na ratio] and yield attributes (number of pods/plant, seeds/pod and seed yield/plant). The salt-tolerant genotype exhibited maximum value for growth, physio-biochemical and yield attributes at 60 mg N kg 1 sand than that of salt-sensitive genotype. These results suggest that application of N may ameliorate most of the attributes and prove to be a physiological remedy to increase the tolerance against the ill effects of salt stress in Brassicas. 展开更多
关键词 Brassica juncea L. carbonic anhydrase activity MALONDIALDEHYDE net photosynthetic rate osmoprotectants salt stress
下载PDF
Relations Between Photosynthetic Parameters and Seed Yields of Adzuki Bean Cultivars (Vigna angularis) 被引量:7
15
作者 SONG Hui GAO Jin-feng +5 位作者 GAO Xiao-li DAI Hui-ping ZHANG Pan-an FENG Bai-li WANG Peng-ke CHAI Yan 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2012年第9期1453-1461,共9页
The study comparatively examined the leaf photosynthetic capacities of different adzuki bean cultivars, high-yield 2000-75 and Jihong 9218, and low-yield Hongbao 1 and Wanxuan 1 from flowering to ripening. It showed t... The study comparatively examined the leaf photosynthetic capacities of different adzuki bean cultivars, high-yield 2000-75 and Jihong 9218, and low-yield Hongbao 1 and Wanxuan 1 from flowering to ripening. It showed that after flowering, the leaves of the cultivars gradually aged, the leaf chlorophyll (Chl.), soluble protein (SP) contents, net photosynthetic rates (Pn), transpiration rates (Tr) and stomatal conductance (G) of the cultivars tended to decline, but the leaf intercellular CO2 concentration (Ci) of the cultivars tended to rise. The leaf photosynthetic capacities of the cultivars decreased gradually from the lower to the upper nodes. The dry seed yields of the cultivars were positively correlated with their leaf Chl., SP, Pn, and Tr and Gs, and negatively associated with their leaf Ci. At the late growth stages, the high-yield cultivars maintained higher leaf Chl. contents, SP contents, Pn, Tr, and Gs than the low-yield cultivars, indicating that leaf photosynthetic capacity was one of important yield-affecting factors of adzuki bean. Therefore, it was important for a crop at the crucial stage of yield formation to maintain a high leaf chlorophyll content and a high leaf photosynthetic capacity and delay leaf aging. 展开更多
关键词 adzuki bean net photosynthetic rate chlorophyll content dry seed yield
下载PDF
Effects of Multi-Stage Continuous Drought on Photosynthetic Characteristics, Yield and Water Use Efficiency of Winter Wheat 被引量:2
16
作者 Daoxi Li Ruitao Lou +2 位作者 Yanbin Li Zepeng Bian Ya’nan Zhu 《Phyton-International Journal of Experimental Botany》 SCIE 2020年第3期691-703,共13页
A drought event can cause entire crops to fail or yield loss.In order to study the effects of continuous drought on photosynthetic characteristics,yield,and water use efficiency(WUE)of winter wheat(Triticum aestivum L... A drought event can cause entire crops to fail or yield loss.In order to study the effects of continuous drought on photosynthetic characteristics,yield,and water use efficiency(WUE)of winter wheat(Triticum aestivum L.),the winter wheat variety“Aikang 58”was selected as test material with controlling the water of the pot-planted winter wheat under a mobile rainout shelter.Based on foot planting and safe wintering,winter wheat was evaluated under different drought conditions,including light,moderate and severe drought at the jointing(B),heading(C),and filling(G)stages.The soil water content was controlled in a range of 60%to 70%,50%to 60%,and 40%to 50%of the field capacity,respectively.In the experiment,there were 9 single-stage droughts,3 three-stage droughts,and 1 test control(totaling 13 trials).The results are as follows:Under a single-stage drought,the change of net photosynthetic rate(Pn)and stomatal conductance(Gs)have similar trends,and they both decrease significantly with the severity of the drought.Under three-stage continuous droughts,the change curve of Gs shows a constant downward trend;the change curve of Pn showed a“valley shape,”and the minimum value of Pn appeared at the heading stage.All droughts will reduce the yield of winter wheat.Under the three-stage continuous drought conditions,except for light drought,moderate drought and severe drought will cause significant yield reduction,mainly due to lack of water at the jointing and heading stages.Continuous drought will reduce the WUE,and the difference will reach a significant level under moderate and severe drought.The present results suggested that when water resources are scarce,it is a better irrigation model to save water and achieve high grain yield by applying appropriate water stress(60%–70%FC)during the critical growth period of winter wheat. 展开更多
关键词 Continuous drought net photosynthetic rate stomatal conductance Triticum aestivum L water use efficiency grain yield
下载PDF
Photosynthetic Characteristics of Flag Leaves in Rice White Stripe Mutant 6001 During Senescence Process 被引量:1
17
作者 ZHEN Xiao-hui XU Jin-gang +5 位作者 SHEN Wei-jun ZHANG Xiao-juan ZHANG Qi-jun LU Chuan-gen CHEN Guo-xiang GAO Zhi-ping 《Rice science》 SCIE 2014年第6期335-342,共8页
Physiological, biochemical and electron microscopy analyses were used to investigate the photosynthetic performance of flag leaves in rice white stripe mutant 6001 during the senescence process. Results showed that th... Physiological, biochemical and electron microscopy analyses were used to investigate the photosynthetic performance of flag leaves in rice white stripe mutant 6001 during the senescence process. Results showed that the chlorophyll content at the heading and milk-ripe stages in rice mutant 6001 were about 34.78% and 3.00% less than those in wild type 6028, respectively. However, the chlorophyll content at the fully-ripe stage in rice mutant 6001 was higher than that in wild type 6028. At the heading stage, the net photosynthetic rate (Pn) in rice mutant 6001 was lower than that in wild type 6028. Rice mutant 6001 also exhibited a significantly slower decrease rate of Pn than wild type 6028 during the senescence progress, especially at the later stage. Furthermore, Ca2^-ATPase, Mg~^-ATPase and photophosphorylation activities exhibited the similar trends as the Po. During the senescence process, the 68 kDa polypeptide concentrations in the thylakoid membrane proteins exhibited a significant change, which was one of the critical factors that contributed to the observed change in photosynthesis. We also observed that the chloroplasts of rice mutant 6001 exhibited higher integrity than those of wild type 6028, and the chloroplast membrane of rice mutant 6001 disintegrated more slow during the senescence process. In general, rice mutant 6001 had a relatively slower senescence rate than wild type 6028, and exhibited anti-senescence properties. 展开更多
关键词 chlorophyll content fluorescence emission spectrum net photosynthetic rate polypeptide component PHOTOPHOSPHORYLATION rice mutant ultrastructure
下载PDF
Effects of Different Potassium (K) Fertilizer Rates on Yield Formation and Lodging of Rice 被引量:1
18
作者 Tantan Zhang Xiaoping He +2 位作者 Binglin Chen Longxin He Xiangru Tang 《Phyton-International Journal of Experimental Botany》 SCIE 2021年第3期815-826,共12页
As one of the most important nutrients for plants,potassium(K)has substantial effects on growth and development of crops.Present study was conducted in three different sites in South China in late season in 2019 with ... As one of the most important nutrients for plants,potassium(K)has substantial effects on growth and development of crops.Present study was conducted in three different sites in South China in late season in 2019 with the objective to study the effects of different applied amounts of K fertilizer on yield formation and lodging of rice.Four K fertilizer treatments,K_(0):0 kg potassium oxide(K_(2)O)ha^(−1)(control);K_(1):64.20 kg K_(2)O ha^(−1);K_(2):128.55 kg K_(2)O ha^(−1) and K_(3)153.90 kg K_(2)O ha^(−1) were applied in the field experiment.The results showed that K_(2) and K_(3) treatments significantly increased panicle number per unit area,grain number per panicle,seed-setting rate and the grain yield of rice compared with K_(0) treatment.Higher net photosynthetic rates were recorded in K_(2) and K_(3) treatments than K_(0) treatment at tillering stage,heading stage and maturity stage.K fertilizer treatments also increased the chlorophyll content and dry matter accumulation by 6.16–23.52%and 21.32–64.59%compared with K_(0) treatment,respectively.Moreover,the total N and K accumulation in the aboveground tissues of rice significantly increased under K_(2) and K_(3) treatments compared with K_(0) treatment.Furthermore,compared with K_(0) treatment,K fertilizer treatments significantly enhanced the breaking-resistant strength by 40.94–144.24%and reduced the lodging index of rice by 13.14–36.72%. 展开更多
关键词 LODGING net photosynthetic rate POTASSIUM RICE SPAD value
下载PDF
Analysis on Pigment and Photosynthetic Characteristics of Leaves of New Strain of Rehmannia glutinosa 被引量:1
19
作者 Xing FAN Xiaoting ZHOU +2 位作者 Jun WANG Xingchen SHANG Jianjun LI 《Asian Agricultural Research》 2017年第6期101-103,107,共4页
Through the analysis on the leaf color and photosynthetic characteristics of new strains and main cultivars of Rehmannia glutinosa,it is expected to provide theoretical basis for breeding of new varieties. Chlorophyll... Through the analysis on the leaf color and photosynthetic characteristics of new strains and main cultivars of Rehmannia glutinosa,it is expected to provide theoretical basis for breeding of new varieties. Chlorophyll,anthocyanin,and net photosynthetic rate(Pn),stomatal conductance(Cond),transpiration rate(Tr),and intercellular CO2concentration(Ci) in 8 varieties of Rehmannia glutinosa were measured by spectrophotometer and LI-6400 XT Portable Photosynthesis System. The results showed that the chlorophyll content of Huaidijin 8(2. 84 mg/g),Huaidi 81(2. 71 mg/g),Huaidi 85-5(2. 69 mg/g),Jinjiu(2. 66 mg/g) and Huaidi 83(2. 63 mg/g) was higher; the anthocyanin content of Jinjiu(0. 169) and Huaidijin 8(0. 165) was higher,while the anthocyanin content Huaidi 83(0. 060) was the lowest; Pn of Huaidi81[2. 41 μmol/(m2·s) ],Huaidi 83[2. 37 μmol/(m2·s) ]and Huaidijin 8[2. 25 μmol/(m2·s) ]was higher,and the anthocyanin content was positively correlated with Pn,while the anthocyanin content was negatively correlated with Pn; Huaidijin 8 and Huaidi 83 showed dominant advantages in single plant fresh weight,indicator component,and resistance over the main cultivars. This indicates that the new variety Huaidijin 8 and Huaidi 83 have excellent comprehensive traits and can be properly popularized. 展开更多
关键词 Rehmannia glutinosa New strains CHLOROPHYLL ANTHOCYANIN net photosynthetic rate(Pn)
下载PDF
Diurnal Variation of Photosynthetic Physiological Characteristics of Kadsura coccinea(Lem.)A.C.Smith
20
作者 Zongyou CHEN Shengfeng CHAI +2 位作者 Xiaoxue QI Yujing Wei Huafei CEN 《Agricultural Biotechnology》 CAS 2021年第4期48-50,54,共4页
[Objectives]This study was conducted to investigate the diurnal variations of photosynthetic and physiological characteristics in 3-year-old Kadsura coccinea(Lem.)A.C.Smith plants.[Methods]A Li-6400 portable photosynt... [Objectives]This study was conducted to investigate the diurnal variations of photosynthetic and physiological characteristics in 3-year-old Kadsura coccinea(Lem.)A.C.Smith plants.[Methods]A Li-6400 portable photosynthetic system was used to study the diurnal variations of the photosynthetic physiological characteristics of K.coccinea.[Results]The diurnal variation of the net photosynthetic rate(Pn)of K.coccinea leaves showed a"double peak"curve,and there was a lunch break at noon.The maximum value of Pn[4.51 mmol/(m^(2)·s)]appeared at 10:00,and the daily average Pn was 3.98 mol/(m^(2)·s);and the stepwise regression analysis showed that photosynthetically active radiation(PAR)and stomatal conductance(Gs)were the main factors affecting Pn.The partial correlation analysis and path analysis showed that the order of effects on Pn was Gs>PAR.[Conclusions]This study provides a reference for further research on the development and utilization of K.coccinea. 展开更多
关键词 Kadsura coccinea(Lem.)A.C.Smith net photosynthetic rate Daily variation PHOTOSYNTHESIS
下载PDF
上一页 1 2 3 下一页 到第
使用帮助 返回顶部