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Mechanistic action of gibberellins in legume nodulation

Journal of Integrative plant Biology 2014年第10期56卷 971-978页

作者： Satomi Hayashi Peter M.Gresshoff Brett J.Ferguson Centre for Integrative Legume Research The University of Queensland

Legume plants are capable of entering into a symbiotic relationship with rhizobia *** results in the formation of novel organs on their roots,called nodules,in which the bacteria capture atmospheric nitrogen and provide it as ammonium to the host *** molecular and physiological changes are involved in the formation and establishment of such *** phytohormones are known to play key roles in this ***（gibberellic acids;GAs）,a class of phytohormones known to be involved in a wide range of biological processes（i.e.,cell elongation,germination）are reported to be involved in the formation and maturation of legume nodules,highlighted by recent transcriptional analyses of early soybean symbiotic ***,we summarize what is currently known about GAs in legume nodulation and propose a model of GA action during nodule *** from a wide range of studies,including GA application,mutant phenotyping,and gene expression studies,indicate that GAs are required at different stages,with an optimum,tightly regulated level being key to achieve successful *** acids appear to be required at two distinct stages of nodulation：（i）early stages of rhizobia infection and nodule primordium establishment;and（ii）later stages of nodule maturation.

关键词： Gibberellic acid legume nodulation phytohormone plant development rhizobia symbiosis

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Functional Role of miRNAs: Key Players in Soybean Improvement

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Phyton-International Journal of Experimental Botany 2021年第5期90卷 1339-1362页

作者： Kapil Gupta Sujit Kumar Mishra Shubhra Gupta Saurabh Pandey Jogeswar Panigrahi Shabir Hussain Wani CSIR-Central Institute of Medicinal and Aromatic plants Lucknow226015India Department of Zoology School of Applied SciencesCenturion University of Technology and ManagementBhubaneswar751009India Department of Biotechnology Central University of RajasthanAjmer305817India plant Molecular Biology International Center for Genetic Engineering&BiotechnologyNew Delhi110067India Department of Biosciences and Bioinformatics Khallikote UniversityBerhampur761008India Mountain Research Center for Field Crops KhudwaniSher-e-Kashmir University of Agricultural Sciences and Technology of KashmirAnantnag192101India

Soybean(Glycine max(L.)Merr)is an agro-economic crop growing across the world to cater nutrition for both human and animal feed due to the high oil and protein content in its edible *** genes and QTLs associated with important agronomic traits in this crop have already been identified and validated for soybean cyst nematode(SCN),Phytophthora root and stem rot,Pythium root rot and aphid resistance,seed quality,nutrient values,and also employed for genetic improvement in *** the last decade,micro RNAs(miRNAs)have been considered the effector molecules,so the detection and characterization of novel miRNAs in soybean have been taken up by several *** advancement in the strategy of sequencing and tools of bioinformatics during last decade has contributed to the discovery of many soybean miRNAs,thus miRNA can be used as a tool in molecular breeding studies,and this has opened new vistas for miRNA mediated genetic improvement of soybean to augment crop productivity as well as nutritional *** review addresses the current state of understanding of miRNAmediated stress responses,nutrient acquisition,plant development and crop production processes in soybean.

关键词： Soybean miRNA quality improvement plant development genetic engineering molecular breeding

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A Botanist’s Cognitive View on plant Growth: Cross-Talk between developmental and Sensitivity Networks

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American Journal of plant Sciences 2016年第15期7卷 2307-2322页

作者： Dhananjay K. Pandey Bhupendra Chaudhary School of Biotechnology Gautam Buddha University Greater Noida India

An alteration in plant phenotypes assisted by their responses to the environmental stimuli (=tropism) has been fundamental to understand the “plant sensitivity ” that plays a crucial role in plants’ adaptive success. plants succeed through the deployment of moderators controlling polar auxin-transport determining organ bending. Stimulus-specific effectors can be synthesized by the outer peripheral cells at the bending sites where they target highly conserved cellular processes and potentially persuade the plant sensitivity at large. Remarkably, the peripheral cells require different time-intervals to achieve the threshold expression-levels of stimulus-specific molecular responders. After stimulus perception, tropic curvatures (especially at growing root-apices) are duly coordinated via integrated chemical and electrical signalling which is the key to cellular communications. Thus, the acquired phenotypic alterations are the perplexed outcome of plant’s developmental pace, complemented by the sensitivity. A novel aspect of this study is to advance our understanding of plant developmental-programming and the extent of plant-sensitivity, determining the plant growth and their future applications.

关键词： Tropism Anisotropy plant development Polar Auxin Transport Phototropic Response Gravitropic Response

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Altered cell division and plastid biogenesis results from downregulation of a DNA methyltransferase homolog in tomato

Altered cell division and plastid biogenesis results from do...

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2013全国植物生物学大会

作者： TANG Xiaofeng ZHAO Wei CAO Xulv LIU Yongsheng School of Biotechnology and Food Engineering Hefei University of Technology Ministry of Education Key Laboratory for Bio-resource and Eco-environment College of Life ScienceState Key Laboratory of Hydraulics and Mountain River EngineeringSichuan University

Cell cycle regulation is an important feature of plant *** cell division cycle involves nuclear and cytoplasmic events,namely organelle multiplication and distribution between the daughter cells,and also involves division and distribution of organelles such as *** division requires a large number of complicated processes that must be executed in a spatially and temporally controlled *** eukaryotic cell cycle is regulated at multiple points that involve the activation of a special class of serine-threonine protein kinases, named cyclin-dependent kinases(CDKs).Plastid division is performed by the constriction of a protein complex that forms at the division site,spanning both the inside and the outside of the two plastid envelope *** reports have suggested that plastid division is regulated in cell cycle-dependent way. We recently characterized a tomato DNA methyhransferase homolog(SICMT3) via reverse genetics technique and found downregulation of SlCMT3 displayed reduced fruit size, dark green phenotype similar to the high pigment 1(hpl ) mutant fruit whose underlying gene codes for DDB1(UV-damaged DNA binding protein 1),and increased chlorophyll level as well as chloroplast number and *** data showed overexpression of one alternatively spliced tomato DDB1 transcript(DDB1) resulted in reduction of fruit size due to the attenuation of cell division via epigenetic *** hypothesis is that the SlCMT3 and CUL4- DDB1 complex may be involved in the same signaling pathway incorporated cell division with chloroplast biogenesis and development,required for modification of chromatin structure and alternative DNA *** will further take the tomato as research model,combined with the techniques such as the reversed genetics,biochemical and molecular tools,omics and transgenic approaches to investigate the biochemical and biological roles of SlCMT3.

关键词： tomato DNA methylation S1CMT3 CUL4-DDB1 complex chlorophyll plant development

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Lipid metabolism is involved in the development of functional stomata in Arabidopsis

Lipid metabolism is involved in the development of functiona...

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2016年全国植物生物学大会

作者： Sheng-Chao Ge Tao Zhou Jing-Jing He Jirong Huang Yun-Kuan Liang State Key Laboratory of Hybrid Rice Department of Plant SciencesCollege of Life SciencesWuhan University State Key Laboratory of plant Molecular Genetics Institute of Plant Physiology and EcologyShanghaiInstitutes for Biological SciencesChinese Academy of Sciences

Stomata that are bordered by pairs of guard cells are specialized for regulating gas exchange and transpiration in plants. During the past decade immense progress has been made in understanding the early stages of guard cell differentiation,but the downstream development for functional stomatal guard cells remains poorly understood. Here we reported two Arabidopsis mutants,wizened stomata 1(wiz1-1) and wizened stomata 2(wiz2-1),which have 31% and 16% deformed stomata,respectively. These abnormal stomata bear a general resemblance to the flat tires of cars,and the sizes of wizened guard cells in wiz1-1 and wiz2-1 mutants are 85% and 75% of the wild type(WT) ones. Except for the stomatal shape and size,mutations in WIZ1 and WIZ2 did not affect the stomatal density and stomatal indices. In addition,stomatal conductance(g) induced by low [CO] and light illumination was significantly reduced in mutants. When tested with the light-and fusicoccin-induced stomatal opening bioassays,the deformed stomata of wiz1-1 and wiz2-1 showed nearly no aperture changes while the normal shaped stomata behaved comparably to those of WT in terms of stomatal movement. Genetic analysis showed that these two mutants are not allelic. By tracing developmental process of deformed stomata in wiz1-1 and wiz2-1,we found that the morphological defects occurred after guard mother cells were divided to form young stomata,suggesting that both WIZ1 and WIZ2 regulate guard cell differentiation at the late stage. The development of the ventral wall of the wizened guard cells was disturbed,and large lipid drops(LD) accumulated in the wizened guard cells. These results imply that WIZs may play important roles in the development of fully functional stomata through modulating LD biogenesis in Arabidopsis thaliana. We are currently working on the fine gene mapping and dissecting the molecular mechanisms regulating the development of functional stomata by the WIZ genes.

关键词： environmental stress stomatal function guard cell lipid metabolism plant development

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春提前保护栽培方式对厚皮甜瓜生长发育和产量效益的影响

春提前保护栽培方式对厚皮甜瓜生长发育和产量效益的影响

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纪念全国西瓜甜瓜科研与生产协作50周年暨第12次全国西...

作者：陈年来陶永红张文杰甘肃农业大学农学院民勤县瓜果蔬菜局瓜州县农技中心

在三种不同春提前保护栽培方式下,进行了厚皮甜瓜适宜品种筛选和生长发育及产量效益试验。结果表明,大部分中小果型厚皮甜瓜品种均适合在营养钵育苗小拱棚栽培、小拱棚直播栽培和防寒钵保护栽培等三种不同春提前保护方式下栽培;与大田... 详细信息

在三种不同春提前保护栽培方式下,进行了厚皮甜瓜适宜品种筛选和生长发育及产量效益试验。结果表明,大部分中小果型厚皮甜瓜品种均适合在营养钵育苗小拱棚栽培、小拱棚直播栽培和防寒钵保护栽培等三种不同春提前保护方式下栽培;与大田覆膜栽培相比,在三

关键词： Cucumis melo plant development melon yield economical benefit

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