期刊文献+
共找到9,881篇文章
< 1 2 250 >
每页显示 20 50 100
Lactobacillus from fermented bamboo shoots prevents inflammation in DSS-induced colitis mice via modulating gut microbiome and serum metabolites
1
作者 Xiangru Liu Xiaoling Lu +6 位作者 Hao Nie Jing Yan Zhiwen Ma Hailin Li Shixin Tang Qi Yin Jingfu Qiu 《Food Science and Human Wellness》 SCIE CAS CSCD 2024年第5期2833-2846,共14页
Fermented bamboo shoots(FBS)is a region-specific food widely consumed in Southwestern China,with Lactobacillus as the predominant fermenting bacteria.However,the probiotic potential of Lactobacillus derived from FBS r... Fermented bamboo shoots(FBS)is a region-specific food widely consumed in Southwestern China,with Lactobacillus as the predominant fermenting bacteria.However,the probiotic potential of Lactobacillus derived from FBS reminds largely unexplored,especially for diseases with a low prevalence in areas consuming FBS,namely,inflammatory bowel disease.In this study,Lactiplantibacillus pentosus YQ001 and Lentilactobacillus senioris YQ005 were screening by in vitro probiotic tests to further investigate the probioticlike bioactivity in dextran sulfate sodium(DSS)-induced ulcerative colitis(UC)mouse.They exhibited more positive probiotic effects than Lactobacillus rhamnosus GG in preventing intestinal inflammatory response.The results revealed that both strains improved the abundance of deficient intestinal microbiota in UC mice,including Muribaculaceae and Akkermansia.In the serum metabolome,they modulated the DSS-disturbed levels of metabolites,with significant increment of cinnamic acid.Meanwhile,they reduced the expression levels of interleukin-1β(IL-1β),interleukin-6(IL-6)inflammatory factors and increased zonula occludens-1(ZO-1),Occludin,and cathelicidin-related antimicrobial peptide(CRAMP)in the colon.Consequently,these results demonstrated that Lactobacillus spp.isolates derived from FBS showed promising probiotic activity based on the gut microbiome homeostasis modulation,anti-inflammation and intestinal barrier protection in UC mice. 展开更多
关键词 Fermented bamboo shoots LACTOBACILLUS Probiotic activity Gut microbiome modulation Ulcerative colitis
下载PDF
Summer Warming Limited Bud Output Drives a Decline in Daughter Shoot Biomass through Reduced Photosynthetis of Parent Shoots in Leymus chinensis Seedlings
2
作者 Song Gao Ruocheng Xu +4 位作者 Lin Li Jiao Wang Nian Liu Johannes M.H.Knops Junfeng Wang 《Phyton-International Journal of Experimental Botany》 SCIE 2024年第7期1667-1675,共9页
Understanding how summer warming influences the parent and daughter shoot production in a perennial clonal grass is vital for comprehending the response of grassland productivity to global warming.Here,we conducted a s... Understanding how summer warming influences the parent and daughter shoot production in a perennial clonal grass is vital for comprehending the response of grassland productivity to global warming.Here,we conducted a simulated experiment using potted Leymus chinensis,to study the relationship between the photosynthetic activ-ity of parent shoots and the production of daughter shoots under a whole(90 days)summer warming scenario(+3°C).The results showed that the biomass of parents and buds decreased by 25.52%and 33.45%,respectively,under warming conditions.The reduction in parent shoot biomass due to warming directly resulted from decreased leaf area(18.03%),chlorophyll a(18.27%),chlorophyll b(29.21%)content,as well as a reduction in net photosynthetic rate(7.32%)and the maximum quantum efficiency of photosystem II(PSII)photochemistry(4.29%).The decline in daughter shoot biomass was linked to a decrease in daughter shoot number(33.33%)by warming.However,the number of belowground buds increased by 46.43%.The results indicated that long-term summer warming reduces biomass accumulation in parent shoot by increasing both limitation of stoma and non-stoma.Consequently,the parent shoot allocates relatively more biomass to the belowground organs to maintain the survival and growth of buds.Overall,buds,as a potential aboveground population,could remedy for the cur-rent loss of parent shoot density by increasing the number of future daughter shoots if summer warming subsides. 展开更多
关键词 Warming parent shoot bud bank photosynthesis chlorophyllfluorescence Leymus chinensis
下载PDF
Multi-Scale Mixed Attention Tea Shoot Instance Segmentation Model
3
作者 Dongmei Chen Peipei Cao +5 位作者 Lijie Yan Huidong Chen Jia Lin Xin Li Lin Yuan Kaihua Wu 《Phyton-International Journal of Experimental Botany》 SCIE 2024年第2期261-275,共15页
Tea leaf picking is a crucial stage in tea production that directly influences the quality and value of the tea.Traditional tea-picking machines may compromise the quality of the tea leaves.High-quality teas are often... Tea leaf picking is a crucial stage in tea production that directly influences the quality and value of the tea.Traditional tea-picking machines may compromise the quality of the tea leaves.High-quality teas are often handpicked and need more delicate operations in intelligent picking machines.Compared with traditional image processing techniques,deep learning models have stronger feature extraction capabilities,and better generalization and are more suitable for practical tea shoot harvesting.However,current research mostly focuses on shoot detection and cannot directly accomplish end-to-end shoot segmentation tasks.We propose a tea shoot instance segmentation model based on multi-scale mixed attention(Mask2FusionNet)using a dataset from the tea garden in Hangzhou.We further analyzed the characteristics of the tea shoot dataset,where the proportion of small to medium-sized targets is 89.9%.Our algorithm is compared with several mainstream object segmentation algorithms,and the results demonstrate that our model achieves an accuracy of 82%in recognizing the tea shoots,showing a better performance compared to other models.Through ablation experiments,we found that ResNet50,PointRend strategy,and the Feature Pyramid Network(FPN)architecture can improve performance by 1.6%,1.4%,and 2.4%,respectively.These experiments demonstrated that our proposed multi-scale and point selection strategy optimizes the feature extraction capability for overlapping small targets.The results indicate that the proposed Mask2FusionNet model can perform the shoot segmentation in unstructured environments,realizing the individual distinction of tea shoots,and complete extraction of the shoot edge contours with a segmentation accuracy of 82.0%.The research results can provide algorithmic support for the segmentation and intelligent harvesting of premium tea shoots at different scales. 展开更多
关键词 Tea shoots attention mechanism multi-scale feature extraction instance segmentation deep learning
下载PDF
Core clock component MtLUX controls shoot architecture through repression of MtTB1/MtTCP1A in Medicago truncatula 被引量:2
4
作者 Liping Wang Anqi Zhou +7 位作者 Lulu Wang Jing Li Mingkang Yang Tingting Duan Jian Jin Liang Chen Liangfa Ge Wei Huang 《The Crop Journal》 SCIE CSCD 2023年第3期723-732,共10页
Plants are capable of regulating their shoot architecture in response to diverse internal and external environments.The circadian clock is an adaptive mechanism that integrates information from internal and ambient co... Plants are capable of regulating their shoot architecture in response to diverse internal and external environments.The circadian clock is an adaptive mechanism that integrates information from internal and ambient conditions to help plants cope with recurring environmental fluctuations.Despite the current understanding of plant circadian clock and genetic framework underlying plant shoot architecture,the intricate connection between these two adaptive mechanisms remains largely unclear.In this study,we elucidated how the core clock gene LUX ARRHYTHMO(LUX)regulates shoot architecture in the model legume plant Medicago truncatula.We show that mtlux mutant displays increased main stem height,reduced lateral shoot length,and decreased the number of lateral branches and biomass yield.Gene expression analysis revealed that Mt LUX regulated shoot architecture by repressing the expression of strigolactone receptor MtD14 and MtTB1/MtTCP1A,a TCP gene that functions centrally in modulating shoot architecture.In vivo and in vitro experiments showed that Mt LUX directly binds to a cis-element in the promoter of MtTB1/MtTCP1A,suggesting that Mt LUX regulates branching by rhythmically suppressing MtTB1/MtTCP1A.This work demonstrates the regulatory effect of the circadian clock on shoot architecture,offering a new understanding underlying the genetic basis towards the flexibility of plant shoot architecture. 展开更多
关键词 Medicago truncatula Circadian clock MtLUX shoot architecture MtTB1/MtTCP1A
下载PDF
Determination of Inorganic Elements Content and Distribution in Bamboo Shoots by Microwave Digestion and ICP-MS 被引量:2
5
作者 Jianzhi Ye Zipeng Su +3 位作者 Ling Lin Yubing Zha Mingyue Wang Chunliang Yang 《Journal of Agricultural Chemistry and Environment》 2016年第3期152-157,共6页
Microwave digestion and inductively coupled plasma mass spectrometry (ICP-MS) method was used to determine the contents of 25 inorganic elements in basal part, meat and shell of bamboo shoots. It could be concluded th... Microwave digestion and inductively coupled plasma mass spectrometry (ICP-MS) method was used to determine the contents of 25 inorganic elements in basal part, meat and shell of bamboo shoots. It could be concluded that the method could be applied to determine 25 inorganic elements in bamboo shoots. The elements with a dry basis content higher than 10 mg/kg were listed in the order of content decrease as follows, basal part of bamboo shoots: K > Ca > Mg > Mn > P > Al > Fe > Zn > Na;bamboo shoots meat: K > P > Ca > Mg > Mn > Fe > Al > Zn > Na > Ba > Sr;bamboo shoots shell: K > P > Mg > Ca > Mn > Al > Fe > Na > Zn;B, Pb, Cu, Cr ranged from 1.0 - 10 mg/kg;Ga, As, Se, Cd, Sn, Sb, V, Co, Ni were lower than 0.80 mg/kg. The harmful elements Cd, As, Cr, Hg, Pb were commonly monitored in feeds. The wet basis content (mg/kg) of Cd, As, Cr was lower than: 0.028, 0.022 and 0.42 respectively;no Hg was found;the content of Pb(mg/kg) in basal part, meat and shell of bamboo shoots was 0.82, 0.35 and 0.41 respectively. The results provide basic data for the development of bamboo shoots and its byproduct. 展开更多
关键词 Bamboo shoots Basal Part of Bamboo shoots Bamboo shoots Meat Bamboo shoots Shell Inorganic Element
下载PDF
A two-parameter multiple shooting method and its application to the natural vibrations of non-prismatic multi-segment beams
6
作者 R.HOŁUBOWSKI K.JARCZEWSKA 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2023年第12期2243-2252,共10页
This paper presents an enhanced version of the standard shooting method that enables problems with two unknown parameters to be solved.A novel approach is applied to the analysis of the natural vibrations of Euler-Ber... This paper presents an enhanced version of the standard shooting method that enables problems with two unknown parameters to be solved.A novel approach is applied to the analysis of the natural vibrations of Euler-Bernoulli beams.The proposed algorithm,named as two-parameter multiple shooting method,is a new powerful numerical tool for calculating the natural frequencies and modes of multi-segment prismatic and non-prismatic beams with different boundary conditions.The impact of the axial force and additional point masses is also taken into account.Due to the fact that the method is based directly on the fourth-order ordinary differential equation,the structures do not have to be divided into many small elements to obtain an accurate enough solution,even though the geometry is very complex.To verify the proposed method,three different examples are considered,i.e.,a three-segment non-prismatic beam,a prismatic column subject to non-uniformly distributed compressive loads,and a two-segment beam with an additional point mass.Numerical analyses are carried out with the software MATHEMATICA.The results are compared with the solutions computed by the commercial finite element program SOFiSTiK.Good agreement is achieved,which confirms the correctness and high effectiveness of the formulated algorithm. 展开更多
关键词 two-parameter multiple shooting method two-point boundary value problem natural vibration non-prismatic beam multi-segment beam
下载PDF
Efficient Decomposition Shooting Method for Solving Third-Order Boundary Value Problems
7
作者 Nawal Al-Zaid Kholoud Alzahrani +1 位作者 Huda Bakodah Mariam Al-Mazmumy 《International Journal of Modern Nonlinear Theory and Application》 2023年第3期81-98,共18页
The present paper proposes a mathematical method to numerically treat a class of third-order linear Boundary Value Problems (BVPs). This method is based on the combination of the Adomian Decomposition Method (ADM) and... The present paper proposes a mathematical method to numerically treat a class of third-order linear Boundary Value Problems (BVPs). This method is based on the combination of the Adomian Decomposition Method (ADM) and, the modified shooting method. A complete derivation of the proposed method has been provided, in addition to its numerical implementation and, validation via the utilization of the Runge-Kutta method and, other existing methods. The method has been applied to diverse test problems and turned out to perform remarkably. Lastly, the simulated numerical results have been graphically illustrated and, also supported by some absolute error comparison tables. 展开更多
关键词 Linear Third Order BVPs shooting Method Adomian Decomposition Method Two-Point Boundary Value Problem
下载PDF
Comparison of Morphological Microstructure of Vitrified and Normal Shoots of Aronia melanocarpa Elloit 被引量:2
8
作者 高晔华 利爽 +2 位作者 吕天舒 胡婷婷 吴荣哲 《Agricultural Science & Technology》 CAS 2014年第10期1667-1670,1683,共5页
The Aronia melanocarpa El oit was used as test material. The microstruc-ture of normal and vitrified shoots and the characteristics of their stomas on leaf surface were compared by paraffin section and leaf epidermis-... The Aronia melanocarpa El oit was used as test material. The microstruc-ture of normal and vitrified shoots and the characteristics of their stomas on leaf surface were compared by paraffin section and leaf epidermis-tearing method. The results showed the palisade tissue of Aronia melanocarpa El oit consists of 2-3 lay-ers of cells. The stomas on lower epidermis cave in, and are smal and dense. There are abundant vessels and sieve tubes in stems. ln contrast, the main veins of vitrified shoots are unobvious, messy and irregular. The boundary between pal-isade tissue and spongy tissue is not obvious. The stomas open circularly and bigly. The stems are swel ing and thick, but the pith parenchyma cells are broken. 展开更多
关键词 Aronia melanocarpa El oit Morphological microstructure Normal shoot Vitrified shoot
下载PDF
Effect of Apple-tea Intercrop on the Growth and Yield of Tea Shoot 被引量:5
9
作者 赵甜甜 蔡新 +5 位作者 汪云刚 陈继伟 刘德和 李岚 罗正飞 李朝云 《Agricultural Science & Technology》 CAS 2011年第2期233-236,共4页
[Objective] The aim was to study the effect of apple-tea intercrop on the growth and yield of tea shoot.[Method] Comparing tea leaves in apple-tea intercrop garden with neighboring tea leaves,the change of tea growth ... [Objective] The aim was to study the effect of apple-tea intercrop on the growth and yield of tea shoot.[Method] Comparing tea leaves in apple-tea intercrop garden with neighboring tea leaves,the change of tea growth and fresh leaves yield in annual growth cycle was observed.[Result] There was obvious difference of tea shoot growth in intercropping and control group in various seasons.In spring,summer and autumn,intercropping tea had lower canopy temperature and higher canopy humidity compared with control tea,while there was no obvious difference of canopy temperature and humidity in intercropping and control tea in winter;the respiratory intensity of intercropping tea was very significantly lower than that of control tea,and its net photosynthetic intensity was very significantly higher than that of control tea,while there was no obvious change law in photosynthetic rate;the effect of intercrop on budding density of tea shoot wasn't obvious,but it promoted early germination of tea bud,increased leaf weight and improved fresh leaf yield.[Conclusion] Our study could provide theoretical foundation for the rational allocation of intercrop in compound ecological tea garden and the production of non-polluted tea. 展开更多
关键词 INTERCROP Tea shoot GROWTH YIELD
下载PDF
Shoot tissue culture of Robinia pseudoacacia f. decaisneana 被引量:5
10
作者 栾庆书 罗凤霞 《Journal of Forestry Research》 SCIE CAS CSCD 2002年第1期51-55,84,共5页
Robinia pseudoacacia f. decaisneana is a transfiguration of Robinia pseudoacacia. For enhancing propagation coefficient of the species, the experiment of shoot tissue culture of Robinia pseudoacacia f. decaisneana was... Robinia pseudoacacia f. decaisneana is a transfiguration of Robinia pseudoacacia. For enhancing propagation coefficient of the species, the experiment of shoot tissue culture of Robinia pseudoacacia f. decaisneana was conducted in Forestry College of Shenyang Agricultural University from July 1999 to July 2001. The experiment included medium selection of explant induction survival, initial culture, subculture as well as rooting culture, and forming seedling with callus. The results showed that shoot segment in vitro survive rate is larger in spring than in autumn, and green dense callus could form plantlet. The best medium for initial culture was SH+0.5mg/L BA+0.05 mg/L NAA, with a propagation coefficient of 4.1 (per micro-cutting in a month), and for subculture it was B5+0.5 mg/L BA+0.05 mg/L NAA+ 10 mg/L Glu., with a propagation coefficient of 4.7. The best rooting medium was 1/2MS+0.5 mg/L NAA+10 mg/L Glu., with a rooting rate of 84.4%. These results provide reference data for reproduction of superior individuals of Robinia pseudoacacia f. decaisneana. 展开更多
关键词 Robinia pseudoacacia f. decaisneana shoot segment Tissue culture MEDIUM
下载PDF
EXPRESSION OF TOMATO ANTISENSE ACC SYNTHASE GENE IN TRANSGENIC TOBACCO AND ITS ROLE IN SHOOT FORMATION 被引量:7
11
作者 马庆虎 宋艳茹 《Acta Botanica Sinica》 CSCD 1997年第11期1047-1052,共6页
An ACC synthase cDNA isolated from tomato (Lycopersicum esculentum Mill.) fruit was constructed in antisense orientation under the transcriptional control of CaMV 35S promoter and then introduced into tobacco (Nicotia... An ACC synthase cDNA isolated from tomato (Lycopersicum esculentum Mill.) fruit was constructed in antisense orientation under the transcriptional control of CaMV 35S promoter and then introduced into tobacco (Nicotiana tabacum L.) . PCR amplification demonstrated the integration of this antisense gene in tobacco genomes. Northern hybridization and reverse transcription-PCR analyses indicated the expression of this heterologous antisense gene in the transgenic tobacco tissues, which caused a decrease in the ethylene production, particularly when shoot regeneration exhibited. The ability of shoot regeneration of the transgenic plant during the culture process was enhanced remarkably as compared with that of the control. These results indicate at the molecular level that ethylene may play a regulatory role in shoot formation. 展开更多
关键词 Heterologous antisense RNA ACC synthase gene shoot regeneration Transgenic tobacco
下载PDF
Comprehensive Pattern of Primordium Initiation in Shoot Apex of Wheat 被引量:2
12
作者 李存东 曹卫星 张月辰 《Acta Botanica Sinica》 CSCD 2002年第3期273-278,共6页
The time course of the initiation of different types of apical primordia on the stem of wheat (Triticum aestivum L.) was investigated to establish a comprehensive pattern of apical primordium development and quantitat... The time course of the initiation of different types of apical primordia on the stem of wheat (Triticum aestivum L.) was investigated to establish a comprehensive pattern of apical primordium development and quantitative dynamic relationships among different primordium initiation. The results showed that the initiation of leaf and bracteal primordia took the S shape, and that of spikelet and floret took the rise stage of parabolic shape in relation to GDD (growing degree days after sowing) in wheat. The bracteal was much like vegetative rather than reproductive organ in terms of the dynamic pattern of primordium initiation. The progress of spikelet and floret primordium initiation could well reflect the characteristics of different genotypes and the impact of different ecological environments on wheat apical development. The integrated model of different primordium initiation in shoot of wheat was an S_shaped curvilinear, and could be divided into three sub_models. The number of leaf primordia was affected by both genotype and environment, while the numbers of bracteal, spikelet and floret primordia were affected mainly by environmental factors. Measured with mean thermochron, the rates of initiation of leaf, bracteal and spikelet primordia in normal planting were the highest among all the sowing date treatments. In contrast to the relationships among leaf, bracteal, spikelet and their initiation duration, the correlation between the number of floret and its initiation duration was highly significant. 展开更多
关键词 WHEAT shoot apex primordium initiation comprehensive pattern dynamic characteristics
下载PDF
Study on Shoot Tip Culture of Illciaceae Ornamental Plants
13
作者 方向明 赵后斌 +2 位作者 刘文倩 郑必平 谈建中 《Agricultural Science & Technology》 CAS 2012年第4期735-738,759,共5页
[Objective] This study aimed to establish a technology system for tissue culture and rapid propagation of Illciaceae ornamental plants. [Method] Effects of medium components and anti-browning agents on the survival an... [Objective] This study aimed to establish a technology system for tissue culture and rapid propagation of Illciaceae ornamental plants. [Method] Effects of medium components and anti-browning agents on the survival and growth of shoot tips were investigated by using apical buds of IItciaceae plant Haierlian as experiment material and MS as basic medium. [Result] The results showed that apical buds at the early germination period in spring were the most suitable explants for tissue culture of IIIciaceae plant Haierlian. Sterilization with 0.1% HgCI2 for 6 min achieved the best effect, while conventional surface-sterilization with ethanol would affect the survival of explants. The optimal medium for primary culture was MS-D (with modifications in major elements and organic components) + anti-browning agents (equa~ volume) + 2.0 mg/L of 6-BA + 0.5 mg/L of NAA. The optimal subculture medi- um was MS-F (with modifications in inorganic and organic components) + anti-brown- ing agents (equal volume) + 2.0 mg/L of 6-BA + 0.1 mg/L of NAA. [Conclusion] This study laid the foundation for establishment of tissue culture and rapid propagation technology system for Haierlian. 展开更多
关键词 Illciaceae plant Haieflian shoot tip culture Sterile system Tissue browning
下载PDF
机械工程trouble-shooting案例分析教学与动手能力培养
14
作者 朱派龙 战祥乐 《广东轻工职业技术学院学报》 2005年第1期38-41,共4页
通过trouble shooting案例的分析、讨论、实例讲解,力图引导、启发和培养学生在实际工作中如何去发现问题、如何对已有知识、经验、技能的灵活处理和技术知识的转移、搬迁、嫁接、变异、变通和改进等方面的技巧和动手能力,目的是使学生... 通过trouble shooting案例的分析、讨论、实例讲解,力图引导、启发和培养学生在实际工作中如何去发现问题、如何对已有知识、经验、技能的灵活处理和技术知识的转移、搬迁、嫁接、变异、变通和改进等方面的技巧和动手能力,目的是使学生学习达到“鱼”、“渔”共获。 展开更多
关键词 机械工程 动手能力 trouble-shooting案例分析 教学内容
下载PDF
Shoot译名之我见
15
作者 王孟本 《科技术语研究》 2001年第3期25-26,共2页
关键词 shoot 译名 植物学 英语 翻译
下载PDF
如何看待shoot一词的中文译名
16
作者 李正理 《科技术语研究》 2001年第3期23-25,共3页
关键词 shoot 中文译名 植物学 翻译 英语
下载PDF
Does the root to shoot ratio show a hormetic response to stress? An ecological and environmental perspective 被引量:9
17
作者 Evgenios Agathokleous Regina G.Belz +2 位作者 Mitsutoshi Kitao Takayoshi Koike Edward J.Calabrese 《Journal of Forestry Research》 SCIE CAS CSCD 2019年第5期1569-1580,共12页
Root/shoot(R/S)ratio is an important index for assessing plant health,and has received increased attention in the last decades as a sensitive indicator of plant stress induced by chemical or physical agents.The R/S ra... Root/shoot(R/S)ratio is an important index for assessing plant health,and has received increased attention in the last decades as a sensitive indicator of plant stress induced by chemical or physical agents.The R/S ratio has been discussed in the context of ecological theory and its potential importance in ecological succession,where species follow different strategies for above-ground growth for light or below-ground competition for water and nutrients.We present evidence showing the R/S ratio follows a biphasic dose–response relationship under stress,typical of hormesis.The R/S ratio in response to stress has been widely compared among species and ecological succession classes.It is constrained by a variety of factors such as ontogeny.Furthermore,the current literature lacks dose-response studies incorporating the full dose–response continuum,hence limiting scientific understanding and possible valuable application.The data presented provide an important perspective for new-generation studies that can advance current ecological understanding and improve carbon storage estimates by R/S ratio considerations.Hormetic response of the R/S ratio can have an important role in forestry for producing seedlings with desired characteristics to achieve maximum health/productivity and resilience under plantation conditions. 展开更多
关键词 Biological plasticity Biphasic RESPONSE HORMESIS Plant STRESS Root/shoot RATIO
下载PDF
Standardization of harvesting age of bamboo shoots with respect to nutritional and anti-nutritional components 被引量:7
18
作者 Ashok K. Pandey Vijayalakshmi Ojha 《Journal of Forestry Research》 SCIE CAS CSCD 2013年第1期83-90,共8页
Bamboo shoots can be harvested at different ages but the data on the changes in nutritional composition with age are scanty. We standardized harvesting age of bamboo shoots in central India to obtain best quality prod... Bamboo shoots can be harvested at different ages but the data on the changes in nutritional composition with age are scanty. We standardized harvesting age of bamboo shoots in central India to obtain best quality produce with respect to nutritional composition. The shoots harvested on different days (2–20 days after emergence from ground) were analyzed for their nutritional (dietary fibres, carbohydrates, proteins, total phenols, ascorbic acid, sodium, potassium, phosphorus, calcium, magnesium and phenolic acids) and anti nutritional (cyanogen) constituents. A significant variation (at p ≤ 0.5) was observed in the nutritional composition of shoots of Dendrocalamus asper, D. strictus and Bambusa tulda harvested at different days. An overall decrease was observed in proteins and total phenols while dietary fibres and carbohydrates increased with ages. Significant variation (at p ≤ 0.5) was also observed in phenolic acids while minerals did not vary significantly. Results revealed that the optimum harvesting age for D. asper, D. strictus and B. tulda was on 10–14 days, 6–10 days and 10–16 days (after emergence from the ground) respectively. These results can be used to obtain quality bamboo shoots. 展开更多
关键词 Bamboo shoots HARVESTING nutritional status central India phenolic acids anti-nutrient
下载PDF
Establishing Submersed Macrophytes via Sinking and Colonization of Shoot Fragments Clipped off Manually 被引量:8
19
作者 WU Zhenbin ZUO Jincheng +3 位作者 MA Jianmin WU Juan CHENG Shuiping LIANG Wei 《Wuhan University Journal of Natural Sciences》 CAS 2007年第3期553-557,共5页
In this paper, sinking and growth of apexes and mid-stems of Myriophyllum spicatum L., Hydrilla verticillata (L.f.) Royle and Ceratophyllum demersum L. in concrete ponds containing eutrophic water and sediment were ... In this paper, sinking and growth of apexes and mid-stems of Myriophyllum spicatum L., Hydrilla verticillata (L.f.) Royle and Ceratophyllum demersum L. in concrete ponds containing eutrophic water and sediment were investigated. Sinking rates of apexes and mid-stems reached 34.8% and 4.4% at the 6 th day and 91.1% and 66.7% at the 22 nd day for M. spicatum, 57.8% and 55.6% at the 6 th day and 100% and 97.8% at the 22 nd day for H. vertieillata, 18.9% and 86.7% at the 6 th day and 95.6% and 100% at the 22 nd day for C. demersum, respectively. Most sunken fragments established themselves successfully with significant growth. Total shoot length ofplantlets developed from apexes and mid-stems increased by 399% and 61% for M. spicatum, 593% and 256% for H. vertieillata and 114% and 104% for C. demersum, respectively. The results showed that it was feasible to establish submersed macrophytes via sinking and colonization of shoot fragments clipped off manually. 展开更多
关键词 EUTROPHICATION submersed macrophyte restoration shoot fragment SINK establish
下载PDF
AtCDC5 regulates the G2 to M transition of the cell cycle and is critical for the function of Arabidopsis shoot apical meristem 被引量:13
20
作者 Zhiqiang Lin Kangquan Yin +3 位作者 Danling Zhu Zhangliang Chen Hongya Gu Li-Jia Qu 《Cell Research》 SCIE CAS CSCD 2007年第9期815-828,共14页
As a cell cycle regulator, the Myb-related CDC5 protein was reported to be essential for the G2 phase of the cell cycle in yeast and animals, but little is known about its function in plants. Here we report the functi... As a cell cycle regulator, the Myb-related CDC5 protein was reported to be essential for the G2 phase of the cell cycle in yeast and animals, but little is known about its function in plants. Here we report the functional characterization of the CDC5 gene in Arabidopsis thaliana. Arabidopsis CDC5 (AtCDC5) is mainly expressed in tissues with high cell division activity, and is expressed throughout the entire process of embryo formation. The AtCDC5 loss-of-function mutant is embryonic lethal. In order to investigate the function of AtCDC5 in vivo, we generated AtCDC5-RNAi plants in which the expression of AtCDC5 was reduced by RNA interference. We found that the G2 to M (G2/M) phase transition was affected in the AtCDC5-RNAi plants, and that endoreduplication was increased. Additionally, the maintenance of shoot apical meristem (SAM) function was disturbed in the AtCDC5-RNAi plants, in which both the WUSCHEL (WUS)- CLAVATA (CLV) and the SHOOT MERISTEMLESS (STM) pathways were impaired. In situ hybridization analysis showed that the expression of STMwas greatly reduced in the shoot apical cells of the AtCDC5-RNAi plants. Moreover, cyclinB1 or Histone4 was found to be expressed in some of these cells when the transcript of STM was undetectable. These results suggest that AtCDC5 is essential for the G2/M phase transition and may regulate the function of SAM by controlling the expression ofSTMand WUS. 展开更多
关键词 AtCDC5 G2/M phase transition shoot apical meristems WUS STM
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部