期刊文献+
共找到96篇文章
< 1 2 5 >
每页显示 20 50 100
Overhead supplemental far-red light stimulates tomato growth under intra-canopy lighting with LEDs 被引量:17
1
作者 ZHANG Ya-ting ZHANG Yu-qi +1 位作者 YANG Qi-chang LI Tao 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2019年第1期62-69,共8页
Far-red(FR) light regulates phytochrome-mediated morphological and physiological plant responses.This study aims to investigate how greenhouse tomato morphology and production response to different durations of FR lig... Far-red(FR) light regulates phytochrome-mediated morphological and physiological plant responses.This study aims to investigate how greenhouse tomato morphology and production response to different durations of FR light during daytime and at the end of day(EOD).High-wire tomato plants were grown under intra-canopy lighting consisting of red(peak wavelength at 640 nm) and blue(peak wavelength at 450 nm) light-emitting diodes(LEDs) with photosynthetic photon flux density(PPFD) of 144 μmol m–2 s–1 at 10 cm away from the lamps,and combined with overhead supplemental FR light(peak wavelength at 735 nm) with PPFD of 43 μmol m–2 s–1 at 20 cm below the lamps.Plants were exposed to three durations of FR supplemental lighting including: 06:00–18:00(FR12),18:00–19:30(EOD-FR1.5),18:00–18:30(EOD-FR0.5),and control that without supplemental FR light.The results showed that supplemental FR light significantly stimulated stem elongation thereby resulting in longer plants compared with the control.Moreover,FR light altered leaf morphology toward higher leaf length/width ratio and larger leaf area.The altered plant architecture in FR supplemented plants led to a more homogeneous light distribution inside the canopy.Total plant biomass was increased by 9–16% under supplemental FR light in comparison with control,which led to 7–12% increase in ripe fruit yield.Soluble sugar content of the ripe tomato fruit was slightly decreased by longer exposure of the plants to FR light.Dry matter partitioning to different plant organs were not substantially affected by the FR light treatments.No significant differences were observed among the three FR light treatments in plant morphology as well as yield and biomass production.We conclude that under intra-canopy lighting,overhead supplemental FR light stimulates tomato growth and production.And supplementary of EOD-FR0.5 is more favorable,as it consumes less electricity but induces similar effects on plant morphology and yield. 展开更多
关键词 SOLANUM lycopersicum far-red light LEDS intro-canopy LIGHTING morphology yield
下载PDF
Far-red light: A regulator of plant morphology and photosynthetic capacity 被引量:7
2
作者 Tingting Tan Shenglan Li +10 位作者 Yuanfang Fan Zhonglin Wang Muhammad Ali Raza Iram Shafiq Beibei Wang Xiaoling Wu Taiwen Yong Xiaochun Wang Yushan Wu Feng Yang Wenyu Yang 《The Crop Journal》 SCIE CSCD 2022年第2期300-309,共10页
Plant photosynthetic capacity directly determines crop yield. Light quality regulates photosynthetic capacity. This review discusses plant responses to far-red light from the phenotypic to the molecular level, focusin... Plant photosynthetic capacity directly determines crop yield. Light quality regulates photosynthetic capacity. This review discusses plant responses to far-red light from the phenotypic to the molecular level, focusing specifically on the improvement of photosynthetic capacity by adjustment of photosynthetic electron transport and the path of light energy. Far-red light can also regulate leaf angle and increase plant height and leaf area, via expression of associated genes, to capture more light energy.Thus, far-red light regulates plant morphology and photosynthetic capacity. Identifying the mechanism of this regulation may lead to increased crop yields. 展开更多
关键词 far-red light Photosynthetic capacity PHOTOSYSTEM Photosynthetic electron transport
下载PDF
Novel Cr^(3+)-activated far-red emitting phosphors withβ-Ca_(3)(PO_(4))_(2)-type structure for indoor plant cultivation 被引量:1
3
作者 Fangyi Zhao Zhen Song Quanlin Liu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2022年第6期1286-1294,共9页
Cr^(3+)-activated far-red and near-infrared phosphors have drawn considerable attention owing to their adjustable emission wavelengths and wide applications.Herein,we reported a series of Cr^(3+)-doped phosphors with... Cr^(3+)-activated far-red and near-infrared phosphors have drawn considerable attention owing to their adjustable emission wavelengths and wide applications.Herein,we reported a series of Cr^(3+)-doped phosphors withβ-Ca_(3)(PO_(4))_(2)-type structure,of which Ca_(9)Ga(PO_(4))_(7):Cr^(3+) possessed the highest far-red emission intensity.At an excitation of 440 nm,the Ca_(9)Ga(PO_(4))_(7):Cr^(3+) phosphors exhibited a broad emission band ranging from 650 to 850 nm and peaking at 735 nm,and the broadband superimposed two sharp lines centering at 690 and 698 nm.The optimal sample Ca_(9)Ga_(0.97)(PO_(4))_(7):0.03 Cr^(3+) had an internal quantum efficiency of 55.7%.The luminescence intensity of the Ca_(9)Ga_(0.97)(PO_(4))_(7):0.03 Cr^(3+) phosphor obtained at 423 K could maintain 68.5%of that at room temperature,demonstrating its outstanding luminescence thermal stability.A phosphor-conversion light-emitting diode was fabricated,indicating that the Ca_(9)Ga(PO_(4))_(7):Cr^(3+) phosphor has potential applications in indoor plant cultivation. 展开更多
关键词 far-red NEAR-INFRARED luminescence trivalent chromium ion plant cultivation
下载PDF
<i>Pinus taeda</i>cDNA Microarray as a Tool for Candidate Gene Identification for Local Red/Far-Red Light Adaptive Response in <i>Pinus sylvestris</i>
4
作者 Sonali S. Ranade Sara Abrahamsson +1 位作者 Juha Niemi María Rosario García-Gil 《American Journal of Plant Sciences》 2013年第3期479-493,共15页
Light quality response is a vital environmental cue regulating plant development. Conifers, like angiosperms, respond to the changes in light quality including the level of red (R) and far-red (FR) light, which follow... Light quality response is a vital environmental cue regulating plant development. Conifers, like angiosperms, respond to the changes in light quality including the level of red (R) and far-red (FR) light, which follows a latitudinal cline. R and FR wavelengths form a significant component of the entire plant life cycle, including the initial developmental stages such as seed germination, cotyledon expansion and hypocotyl elongation. With an aim to identify differentially expressed candidate genes, which would provide a clue regarding genes involved in the local adaptive response in Scots pine (Pinus sylvestris) with reference to red/far-red light;we performed a global expression analysis of Scots pine hypocotyls grown under two light treatments, continuous R (cR) and continuous FR (cFR) light;using Pinus taeda cDNA microarrays on bulked hypocotyl tissues from different individuals, which represented different genotypes. This experiment was performed with the seeds collected from northern part of Sweden (Ylinen, 68?N). Interestingly, gene expression pattern with reference to cryptochrome1, a blue light photoreceptor, was relatively high under cFR as compared to cR light treatment. Additionally, the microarray data analysis also revealed expression of 405 genes which was enhanced under cR light treatment;while the expression of 239 genes was enhanced under the cFR light treatment. Differentially expressed genes were re-annotated using Blast2GO tool. These results indicated that cR light acts as promoting factor whereas cFR antagonises the effect in most of the processes like C/N metabolism, photosynthesis and cell wall metabolism which is in accordance with former findings in Arabidopsis. We propose cryptochrome1 as a strong candidate gene to study the adaptive cline response under R and FR light in Scots pine as it shows a differential expression under the two light conditions. 展开更多
关键词 CONIFER Cryptochrome1 far-red LIGHT Microarray RED LIGHT SCOTS Pine
下载PDF
Low temperature-mediated repression and far-red light-mediated induction determine morning FLOWERING LOCUS T expression levels
5
作者 Hayeon Kim Hye Won Kang +4 位作者 Dae Yeon Hwang Nayoung Lee Akane Kubota Takato Imaizumi Young Hun Song 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2024年第1期103-120,共18页
In order to flower in the appropriate season,plants monitor light and temperature changes and alter downstream pathways that regulate florigen genes such as Arabidopsis(Arabidopsis thaliana)FLOWERING LOCUS T(FT).In Ar... In order to flower in the appropriate season,plants monitor light and temperature changes and alter downstream pathways that regulate florigen genes such as Arabidopsis(Arabidopsis thaliana)FLOWERING LOCUS T(FT).In Arabidopsis,FT messenger RNA levels peak in the morning and evening under natural long-day conditions(LDs).However,the regulatory mechanisms governing morning FT induction remain poorly understood.The morning FT peak is absent in typical laboratory LDs characterized by high red:far-red light(R:FR)ratios and constant temperatures.Here,we demonstrate that ZEITLUPE(ZTL)interacts with the FT repressors TARGET OF EATs(TOEs),thereby repressing morning FT expression in natural environments.Under LDs with simulated sunlight(R:FR=1.0)and daily temperature cycles,which are natural LD-mimicking environmental conditions,FT transcript levels in the ztl mutant were high specifically in the morning,a pattern that was mirrored in the toe1 toe2 double mutant.Low night-to-morning temperatures increased the inhibitory effect of ZTL on morning FT expression by increasing ZTL protein levels early in the morning.Far-red light counteracted ZTL activity by decreasing its abundance(possibly via phytochrome A(phyA))while increasing GIGANTEA(GI)levels and negatively affecting the formation of the ZTL-GI complex in the morning.Therefore,the phyA-mediated high-irradiance response and GI play pivotal roles in morning FT induction.Our findings suggest that the delicate balance between low temperature-mediated ZTL activity and the far-red light-mediated functions of phyA and GI offers plants flexibility in fine-tuning their flowering time by controlling FT expression in the morning. 展开更多
关键词 far-red light FLOWERING LOCUS T flowering time GIGANTEA low night-to-morning temperature natural long days phytochrome A red to far-red ratio ZEITLUPE
原文传递
Stress responsive gene CIPK14 is involved in phytochrome A-mediated far-red light inhibition of greening in Arabidopsis 被引量:5
6
作者 QIN YuZhi2,3, GUO Ming1, LI Xu1, XIONG XingYao2,3, HE ChangZheng2,3, NIE XianZhou4 & LIU XuanMing1 1College of Life Science and Biotechnology, Hunan University, Changsha 410082, China 2College of Horticulture and Landscape, Hunan Agricultural University, Changsha 410128, China +1 位作者 3Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha 410128, China 4Potato Research Centre, Agriculture and Agri-Food Canada, Fredericton, New Brunswick E3B 4Z7, Canada 《Science China(Life Sciences)》 SCIE CAS 2010年第11期1307-1314,共8页
In this study, we show that CIPK14,a stress responsive CBL-interacting protein kinase gene,is involved in phytochrome A-mediated far-red light inhibition of greening in Arabidopsis seedlings. The CIPK14-impairment mut... In this study, we show that CIPK14,a stress responsive CBL-interacting protein kinase gene,is involved in phytochrome A-mediated far-red light inhibition of greening in Arabidopsis seedlings. The CIPK14-impairment mutant cipk14 grown in continuous far-red (FR) light did not show greening when exposed to white light illumination for 15 h. By contrast, the FR-grown phytochrome A null mutant phyA greened within 0.5 h of exposure to white light. Although greening of Col-4 (wild-type) was not completely abolished by FR, it exhibited a significantly decreased greening capacity compared with that of phyA. Further analyses demonstrated that the expression of protochlorophyllide reductase (POR) genes was correlated with the greening ability of the genotypes. In addition, CIPK14 appeared to be regulated by both the circadian clock and PhyA. Taken together, these results suggest that CIPK14 plays a role in PhyA-mediated FR inhibition of seedling greening, and that a Ca-related kinase may be involved in a previously undefined branch point in the phytochrome A signaling pathway. 展开更多
关键词 CHLOROPHYLL CIPK14 far-red light INHIBITION of GREENING POR PHYTOCHROME A
原文传递
Specific tracking of monoamine oxidase A in heart failure models by a far-red fluorescent probe with an ultra large Stokes shift
7
作者 Xinming Li Donglei Shi +10 位作者 Yihe Song Yixiang Xu Ying Gao Wenjing Qiu Xin Chen Xiaokang Li Yunyuan Huang Yanjun Feng Baoli Li Yuan Guo Jian Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第3期1572-1576,共5页
Monoamine oxidase A(MAO-A) is a prominent myocardial source of reactive oxygen species(ROS), and its expression and activity are strongly increased in failing hearts. Therefore, accurate evaluation of MAOA activity in... Monoamine oxidase A(MAO-A) is a prominent myocardial source of reactive oxygen species(ROS), and its expression and activity are strongly increased in failing hearts. Therefore, accurate evaluation of MAOA activity in cardiomyocytes is of great importance for understanding its biological functions and early diagnosing the progression of heart failure. However, so far, there is no report on the fluorescent diagnosis of heart failure by a specific probe for MAO-A. In this work, two far-red emissive fluorescent turn-on probes(KXS-M1 and KXS-M2) for the highly selective and sensitive detection of MAO-A were fabricated.Both probes exhibit good response to MAO-A, one of which, KXS-M2, performs better than the other one in terms of a fluorescence increment and sensitivity. Using the pioneering probe KXS-M2, specific fluorescence imaging of MAO-A in glucose-deprived H9c2 cardiac cells, zebrafish and isoprenaline-induced failing heart tissues was achieved, proving that KXS-M2 can serve as a powerful tool for the diagnosis and treatment of heart failure. 展开更多
关键词 Heart failure Monoamine oxidase A Oxidative stress Fluorescent probe far-red emission Diagnosis
原文传递
R∶FR值对盐胁迫下银杏幼苗生长及光合生理的影响
8
作者 赵慧琴 马悟真 +3 位作者 王改萍 翟金庭 赵群 王峥 《中南林业科技大学学报》 CAS CSCD 北大核心 2024年第9期71-79,共9页
【目的】设置不同比例红光与远红光环境,研究其对盐胁迫下银杏幼苗生长及光合特性的影响,为深入探究通过光质调节提高银杏抗盐性的机制提供理论依据。【方法】以当年生银杏实生苗为研究对象,设置4个处理,分别为对照CK(0 NaCl,红光与远... 【目的】设置不同比例红光与远红光环境,研究其对盐胁迫下银杏幼苗生长及光合特性的影响,为深入探究通过光质调节提高银杏抗盐性的机制提供理论依据。【方法】以当年生银杏实生苗为研究对象,设置4个处理,分别为对照CK(0 NaCl,红光与远红光之比为7,即R∶FR=7)、T1(0.3%NaCl,R∶FR=7)、T2(0.3%NaCl,R∶FR=1.2)、T3(0.3%NaCl,R∶FR=0.8),测定处理14、28、42 d的光合色素含量及相对电导率,于42 d试验结束时测定生长指标、叶片形态和光合指标,分析R∶FR值对盐胁迫下银杏幼苗生长发育及光合能力的影响。【结果】与CK相比,T1、T2处理下银杏幼苗各生长指标均显著下降,T3处理下银杏幼苗叶片鲜、干质量相较T1处理有显著提升。叶片形态参数中,各盐处理相较CK叶面积、叶片周长、叶宽及叶长均出现下降,T1处理下降幅度最大;随着R∶FR值的降低,盐胁迫对银杏幼苗叶片生长抑制减轻。随着胁迫时间的延长,各盐处理的叶片相对电导率均呈上升趋势,T3处理上升幅度最小。不同处理下银杏幼苗叶片叶绿素a(Chla)、类胡萝卜素(Car)和叶绿素a/b(Chla/b)随时间变化总体呈现先降后升的趋势,而叶绿素b(Chlb)和总叶绿素(Chla+b)则呈现相反的变化趋势;各处理组Chla+b含量整体表现为CK>T3>T2>T1,处理42 d后,不同处理间Chla/b表现为CK>T3>T1>T2。光合气体交换参数及光响应曲线特征参数中,T3处理下叶片净光合速率(Pn)、最大净光合速率(P_(n,max))及内禀量子效率(φ_(0))相较CK无显著差异,相较T1处理显著升高;随着光环境中R∶FR值的降低,盐胁迫下银杏幼苗暗呼吸速率(R_(d))、光补偿点(I_(c))显著提升。【结论】随着光环境中R∶FR值的降低,盐胁迫对银杏幼苗的生长、膜系统的损伤、呼吸及光合特性的抑制作用得到了有效缓解;且当R∶FR为0.8时,光合性能得到显著提升,缓解效果最佳。 展开更多
关键词 银杏 盐胁迫 红光与远红光 光合作用 光响应曲线
下载PDF
远红光阶段辐照对水稻幼苗生长及水分利用效率的影响
9
作者 胡晨帆 刘硕硕 +2 位作者 刘靖喆 时运佳 朱梅 《农业工程》 2024年第4期53-60,共8页
以水稻“绿旱639”为研究对象,在水稻种期(T_(1)处理)、芽期(T_(2)处理)和苗期(T_(3)处理)分别进行远红光辐照,并设置对照组(CK处理)。测算了水稻幼苗的生理指标、生长特性及水分利用效率,研究了阶段辐照下远红光对水稻幼苗生长及水分... 以水稻“绿旱639”为研究对象,在水稻种期(T_(1)处理)、芽期(T_(2)处理)和苗期(T_(3)处理)分别进行远红光辐照,并设置对照组(CK处理)。测算了水稻幼苗的生理指标、生长特性及水分利用效率,研究了阶段辐照下远红光对水稻幼苗生长及水分利用效率的影响。结果表明,种期进行辐照水稻幼苗的叶面积比芽期和苗期分别增加了15.82%和20.46%;芽期进行辐照水稻幼苗的相对生长速率比种期和苗期分别增加了23.10%和37.01%,根长、根冠比、净同化速率等指标的增长幅度均大于种期和苗期辐照;苗期进行辐照水稻幼苗的叶片水分利用效率与种期和芽期辐照相比,分别增加了16.60%和23.07%。综上,在水稻幼苗的芽期进行远红光辐照,可以有效促进水稻幼苗的生长;在水稻幼苗的苗期进行远红光辐照,可以显著提高水稻幼苗的水分利用效率。研究结果从光学农业角度为提高水稻及其他作物水分利用效率提供了参考。 展开更多
关键词 水稻 远红光 阶段辐照 相对生长速率 水分利用效率 光学农业
下载PDF
植物补光用In^(3+)掺杂Zn_(3)Ga_(2)Ge_(2)O_(10)∶Cr^(3+)远红光发光材料的性能研究
10
作者 白琼宇 王春浩 《人工晶体学报》 CAS 北大核心 2024年第9期1568-1575,共8页
采用高温固相法制备了Cr^(3+)掺杂的远红光荧光粉,并通过引入In^(3+)对Zn_(3)Ga_(2)Ge_(2)O_(10)∶Cr^(3+)发光特性进行了调控。通过XRD对Zn_(3)(Ga_(1-x)In_(x))_(2)Ge_(2)O_(10)∶2%Cr^(3+)(摩尔分数)的晶体结构进行了分析。利用室温... 采用高温固相法制备了Cr^(3+)掺杂的远红光荧光粉,并通过引入In^(3+)对Zn_(3)Ga_(2)Ge_(2)O_(10)∶Cr^(3+)发光特性进行了调控。通过XRD对Zn_(3)(Ga_(1-x)In_(x))_(2)Ge_(2)O_(10)∶2%Cr^(3+)(摩尔分数)的晶体结构进行了分析。利用室温荧光光谱和热释光光谱分析了Zn_(3)(Ga_(1-x)In_(x))_(2)Ge_(2)O_(10)∶2%Cr^(3+)的发光特性,其发射光谱由^(4)T_(2)(^(4)F)→^(4)A_(2)和^(2)E→^(4)A_(2)跃迁的705、721 nm两发光峰叠加而成。随着Zn_(3)(Ga_(1-x)In_(x))_(2)Ge_(2)O_(10)∶2%Cr^(3+)中In^(3+)掺杂浓度增加,材料发射光谱呈现展宽的现象,这是Cr^(3+)所处晶体场环境的改变导致了晶体场劈裂程度的变化。光谱展宽后荧光材料的发光特性与植物中光敏色素吸收谱更加匹配,因此其有望应用于植物照明领域。此外,随着In^(3+)掺杂浓度增加,荧光材料表现出红色长余辉现象,并且余辉时间与In^(3+)掺杂浓度有关。 展开更多
关键词 荧光粉 Zn_(3)Ga_(2)Ge_(2)O_(10)∶Cr^(3+) In^(3+)掺杂 远红光 阳离子替代 植物补光
下载PDF
Modes of Action of Phytochromes in Establishing Different Phototropic Responsiveness of Maize Coleoptiles 被引量:3
11
作者 刘玉军 赵南明 《Acta Botanica Sinica》 CSCD 2001年第9期923-928,共6页
Previous studies have examined the effects of red light (R) on phototropism of maize ( Zea mays L. cv. Royaldent Hit 85) coleoptiles. The R effect on time-dependent phototropism (TDP) was further studied by characteri... Previous studies have examined the effects of red light (R) on phototropism of maize ( Zea mays L. cv. Royaldent Hit 85) coleoptiles. The R effect on time-dependent phototropism (TDP) was further studied by characterizing its fluence-response relationship. The results showed the R effect was a low-fluence-response, unlike those on pulse-induced phototropisms that show a very-low-fluence-response mode. A subsequent pulse of far-red light (FR) could reverse the R effect. TDP responsiveness, however, recovered as the following FR was extended, The FR-dependent increase in TDP responsiveness was obtained even coleoptiles were pretreated only with FR. It suggested that TDP responsiveness could also be established in response to a FR signal. The fluence-response relationship for the effect of FR was then investigated. The effect of FR depended on the time of irradiation and required high photon fluences. Because reciprocity was invalid at the higher fluence range, the effect of FR would be a high-irradiance-response mode. Relation between phytochrome action modes and possible multiple pathways for phototropic signal transduction was analyzed based on the experiment results. 展开更多
关键词 far-red light high irradiance response PHOTOTROPISM PHYTOCHROME phytochrome action mode maize coleoptile
下载PDF
不同光质对草莓叶片光合作用和叶绿素荧光的影响 被引量:208
12
作者 徐凯 郭延平 张上隆 《中国农业科学》 CAS CSCD 北大核心 2005年第2期369-375,共7页
不同光质下草莓叶片的叶绿素含量、Fv/Fm、Fm/Fo、PSⅡ无活性反应中心数量和QA的还原速率与不同光质中的红光/蓝光比值呈正相关,而叶绿素a/b比值与红光/蓝光比值呈负相关。不同光质下草莓叶片类胡萝卜素的含量蓝膜>绿膜>红膜、白... 不同光质下草莓叶片的叶绿素含量、Fv/Fm、Fm/Fo、PSⅡ无活性反应中心数量和QA的还原速率与不同光质中的红光/蓝光比值呈正相关,而叶绿素a/b比值与红光/蓝光比值呈负相关。不同光质下草莓叶片类胡萝卜素的含量蓝膜>绿膜>红膜、白色膜、黄膜,与红光/远红光(R/FR)呈负相关。不同光质对草莓叶片的表观量子效率、羧化效率及光呼吸速率影响较大。除绿膜下草莓叶片的净光合速率较低外,其它膜下草莓叶片的净光合速率均无明显差异。 展开更多
关键词 草莓 光质 叶片光合作用 红光 净光合速率 叶绿素荧光 红膜 比值 性反应 影响
下载PDF
不同光质对丰香草莓生长发育的影响 被引量:36
13
作者 徐凯 郭延平 +2 位作者 张上隆 戴文圣 符庆功 《果树学报》 CAS CSCD 北大核心 2006年第6期818-824,共7页
研究了相同光强下不同光质对丰香草莓生长发育的影响。结果表明,不同光质膜处理对草莓的生长结果、干物质分配和果实品质均有影响。与中性膜相比,绿膜和红膜下草莓植株的叶柄长度和叶面积显著增加,而蓝膜的叶柄长度和叶面积明显较低。... 研究了相同光强下不同光质对丰香草莓生长发育的影响。结果表明,不同光质膜处理对草莓的生长结果、干物质分配和果实品质均有影响。与中性膜相比,绿膜和红膜下草莓植株的叶柄长度和叶面积显著增加,而蓝膜的叶柄长度和叶面积明显较低。光质不同也影响草莓干物质的分配,干物质向叶片和叶柄分配比例绿膜最高,蓝膜最低,其它膜之间相近。而干物质向果实、冠状茎和根系中的分配比例均以蓝膜最高,其次为红膜,绿膜最低,黄膜与中性膜相近。红膜下生长的草莓,产量最高、果实最大;蓝膜下可溶性固形物含量、抗坏血酸含量和固酸比最高;而绿膜下则产量最低、果实最小、可溶性固形物含量和固酸比最低。抗坏血酸含量的高低与不同膜中的紫外和蓝紫光的比例一致,与红光/蓝光比值相反。 展开更多
关键词 丰香草莓 光质 生长 干物质分配 产量 红光/远红光
下载PDF
暗前适宜LED远红光光照强度促进设施番茄种苗生长发育 被引量:19
14
作者 曹凯 于捷 +2 位作者 叶林 赵海亮 邹志荣 《农业工程学报》 EI CAS CSCD 北大核心 2016年第8期171-176,共6页
为了研究LED光源在设施番茄育苗生产上的精准化利用。该试验以金鹏1号番茄植株为试材,研究了进入黑暗前LED远红光处理对番茄植株形态、激素含量、光合速率和矿质元素含量的影响。结果表明,当番茄植株进入黑暗前进行10 min远红光处理,番... 为了研究LED光源在设施番茄育苗生产上的精准化利用。该试验以金鹏1号番茄植株为试材,研究了进入黑暗前LED远红光处理对番茄植株形态、激素含量、光合速率和矿质元素含量的影响。结果表明,当番茄植株进入黑暗前进行10 min远红光处理,番茄植株的株高及茎的鲜质量发生了明显变化,番茄植株的株高和茎的鲜质量随着远红光光照强度的增加而增加,当远红光的光照强度增加到10μmol/(m^2·s)时番茄植株的株高和茎的鲜质量也达到了最大值。与对照相比,进入黑暗前进行时长10 min,光照强度为10μmol/(m^2·s)的远红光处理后番茄植株叶片中的生长素和赤霉素3的含量显著上升;叶绿素和净光合速率显著降低;番茄植株茎中N含量显著降低,叶中P含量显著降低,K含量显著升高,根系中的N、P、K含量都显著增加。因此,可以通过调控黑暗前远红光的光照强度来精确调控番茄植株的株高,控制番茄的生长。 展开更多
关键词 发光二极管 形态 调控 番茄种苗 远红光
下载PDF
设施环境中红光与远红光比值调控的研究进展 被引量:43
15
作者 刘再亮 马承伟 杨其长 《农业工程学报》 EI CAS CSCD 北大核心 2004年第1期270-273,共4页
该文详述了近年来国内外设施园艺环境中R/FR比值对植物形态、生长发育的影响以及实验、生产中R/FR比值调控方法的研究进展。介绍了几种人工光源及光质调控薄膜的R/FR特性,对进一步开展此项研究工作提出建议。
关键词 设施环境 红光 远红光 R/FR比值
下载PDF
暗期红光、远红光间断处理对小麦叶片细胞壁成分的影响 被引量:9
16
作者 刘学群 杜爱玲 +2 位作者 王春台 王洁 刘建朝 《华中农业大学学报》 CAS CSCD 北大核心 1996年第3期221-224,共4页
在短日照长暗期条件下的暗期,对小麦华麦8号幼苗给予红光、远红光间断处理,研究不同光质对小麦细胞壁成分的影响,结果表明,红光间断处理细胞壁木质素含量增加,远红光处理的则下降;红光与远红光处理的叶片细胞壁纤维素含量虽无明... 在短日照长暗期条件下的暗期,对小麦华麦8号幼苗给予红光、远红光间断处理,研究不同光质对小麦细胞壁成分的影响,结果表明,红光间断处理细胞壁木质素含量增加,远红光处理的则下降;红光与远红光处理的叶片细胞壁纤维素含量虽无明显差异,但红光处理的细胞壁抗纤维素酶水解能力下降,远红光处理的抗纤维素酶水解能力则增强。 展开更多
关键词 小麦 红光 远红光 叶片 细胞壁 木质素 纤维素
下载PDF
W6154s类型水稻在光敏、温敏分类问题上的商讨 被引量:8
17
作者 曾汉来 张自国 +2 位作者 卢兴桂 李合生 杨静 《华中农业大学学报》 CAS CSCD 北大核心 1995年第2期105-110,共6页
光敏核不育水稻农垦58s的光敏不育基因转入籼稻遗传背景后产生的籼型不育系保持了明显的育性转换特性,但其育性转换对温度的变化变得非常敏感,W6154s就是这类新不育系的典型代表。经数年研究证明:W6154s存在一定的光... 光敏核不育水稻农垦58s的光敏不育基因转入籼稻遗传背景后产生的籼型不育系保持了明显的育性转换特性,但其育性转换对温度的变化变得非常敏感,W6154s就是这类新不育系的典型代表。经数年研究证明:W6154s存在一定的光敏温度范围,在此温度范围内具有明显的育性第二光周期反应,其育性变化温度敏感期与光敏感期有部分重叠,在长暗期进行红光闪光间断能有效地诱导花粉育性降低,并且这种效应能被远红光所逆转,温敏不育系的育性转换过程中则没有这些光周期诱导效应。籼型遗传背景只是影响了光敏不育性的表达条件,没有改变其对光周期反应的基本性质,W6154s仍为一种育性感温性强的光敏不育系,不能简单地将之划分为温敏不育系。 展开更多
关键词 育性光周期反应 红光 远红光间断 水稻 分类
下载PDF
特征远红外技术用于果蔬干制的研究 被引量:9
18
作者 吴继红 张欣 +1 位作者 葛毅强 蔡同一 《食品科学》 EI CAS CSCD 北大核心 1998年第8期26-29,共4页
特征远红外装置是一种具有在50℃温度下工作的新型的脱水设备。本实验是利用此装置对大葱、菠菜、香菜、黄瓜、胡萝卜、苹果、梨、葡萄、哈蜜瓜等9种果蔬进行脱水干燥并研究其干燥特点。
关键词 特征远红外干燥 果蔬 干制
下载PDF
远红光对生菜光合作用及叶绿素荧光特性的影响 被引量:11
19
作者 孟力力 宋江峰 +3 位作者 柏宗春 曹凯 张义 杨其长 《江苏农业学报》 CSCD 北大核心 2022年第1期181-189,共9页
以植物工厂中水培生菜为试验对象,白光LED光源处理作为对照,在对照基础上添加不同光照度的远红光设置FR1处理[添加10μmol/(m^(2)·s)远红光]和FR2处理[添加20μmol/(m^(2)·s)远红光],研究不同远红光光照度对生菜生长、光合作... 以植物工厂中水培生菜为试验对象,白光LED光源处理作为对照,在对照基础上添加不同光照度的远红光设置FR1处理[添加10μmol/(m^(2)·s)远红光]和FR2处理[添加20μmol/(m^(2)·s)远红光],研究不同远红光光照度对生菜生长、光合作用及叶绿素荧光特性的影响。结果表明:与对照相比,FR1处理显著提高了生菜株高、最大叶面积、根系长度及干鲜质量;FR2处理的株高、根系长度与对照间差异不显著,且生菜干鲜质量随着远红光照度的增加呈增长变缓趋势。FR2、FR1处理均显著降低了叶片净光合速率,但同时提高了光饱和点及降低了暗呼吸速率,有利于生菜干物质的累积。远红光处理增加了单位面积活性反应中心数量,增加了吸收与捕获的光能;随着远红光强度的增加,FR2处理的PSⅡ供体侧放氧复合体(OEC)遭受严重破坏,用于电子传递的能量显著降低,即吸收的光能用于光化学反应的比例降低;且FR2处理用于热耗散的能量比例显著大于FR1处理。综上所述,在白光LED上添加10μmol/(m^(2)·s)远红光可提高生菜产量。 展开更多
关键词 生菜 LED补光 远红光 生长 光合作用 叶绿素荧光特性
下载PDF
不同红光远红光配比对冰草生长发育、光合特性及品质的影响 被引量:11
20
作者 孟力力 曹凯 +2 位作者 孙倩 柏宗春 张义 《核农学报》 CAS CSCD 北大核心 2022年第1期226-235,共10页
为探明人工光植物工厂中红光远红光配比对水培冰草产量和品质的影响,本研究在光合有效辐射强度200μmol·m^(-2)·s^(-1)的条件下,以白光LED作为CK(R/FR=5.5),在CK基础上添加不同强度远红光,分别设置FR1(R/FR=1.2)和FR2(R/FR=0.... 为探明人工光植物工厂中红光远红光配比对水培冰草产量和品质的影响,本研究在光合有效辐射强度200μmol·m^(-2)·s^(-1)的条件下,以白光LED作为CK(R/FR=5.5),在CK基础上添加不同强度远红光,分别设置FR1(R/FR=1.2)和FR2(R/FR=0.8),研究不同光质组合处理下冰草的生长发育、光合特性及营养品质等指标的变化。结果表明,与CK相比,FR2和FR1的株高分别显著增加32.59%和20.70%,叶面积分别显著增加162.68%和47.33%;FR2的地上部鲜、干质量分别显著增加52.08%和63.66%。FR2和FR1降低了叶片叶绿素含量、叶绿素a/b值及净光合速率,但提高了冰草对弱光的利用能力。低R/FR值对冰草各品质指标有不同程度影响,FR2和FR1的叶片类胡萝卜素较CK分别显著下降27.08%和34.62%;FR2的叶片可溶性糖、可溶性蛋白及维生素C含量较CK分别显著增加23.86%、27.48%和17.73%。FR2和FR1显著增加了冰草中酮类及酯类挥发性物质含量,并显著降低了冰草叶片的硝酸盐含量。综上,植物工厂中白光LED基础上添加远红光设置R/FR值为0.8,可有效提高水培冰草的产量、维生素C、可溶性糖和挥发性酮类及酯类物质含量。本研究为远红光在植物工厂中的应用提供了参考。 展开更多
关键词 冰草 LED补光 红光远红光配比 光合特性 品质
下载PDF
上一页 1 2 5 下一页 到第
使用帮助 返回顶部