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CsRAXs negatively regulate leaf size and fruiting ability through auxin glycosylation in cucumber

Journal of Integrative Plant Biology 2024年第5期66卷 1024-1037页

作者： Jiacai Chen Liu Liu Guangxin Chen Shaoyun Wang Ye Liu Zeqin Zhang Hongfei Li Liming Wang Zhaoyang Zhou Jianyu Zhao Xiaolan Zhang Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops Department of Vegetable SciencesBeijing key Laboratoy of Growtn and Developmental Regul China Agricultural UniversityBeijing 100193China

Leaves are the main photosynthesis organ that directly determines crop yield and *** the regulatory mechanism of leaf development is crucial for food security and ecosystem ***,we identified the novel function of R2R3-MYB transcription factors CsRAXs in regulating cucumber leaf size and fruiting ***5 single mutant exhibited enlarged leaf size and stem diameter,and Csrax1/2/5 triple mutant displayed further enlargement *** of CsRAX1 or CsRAX5 gave rise to smaller leaf and thinner *** fruiting ability of Csrax1/2/5 plants was significantly enhanced,while that of CsRAX5 overexpression lines was greatly ***,cell number and free auxin level were elevated in mutant plants while decreased in overexpression *** data indicated that CsRAX1/5 directly promoted the expression of auxin glucosyltransferase gene ***,our data suggested that CsRAXs function as repressors for leaf size development by promoting auxin glycosylation to decrease free auxin level and cell division in *** findings provide new gene targets for cucumber breeding with increased leaf size and crop yield.

关键词： auxin glycosylation CsRAXs CsUGT74E2 fruiting ability leaf size

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Natural variation in the SVP contributes to the pleiotropic adaption of Arabidopsis thaliana across contrasted habitats

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Journal of Genetics and Genomics 2023年第12期50卷 993-1003页

作者： Xiang Guo Ruyun Liang Shangling Lou Jing Hou Liyang Chen Xin Liang Xiaoqin Feng Yingjun Yao Jianquan Liu Huanhuan Liu Key Laboratory for Bio-Resource and Eco-Environment of Ministry of Education&Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station College of Life ScienceSichuan UniversityChengduSichuan 610065China

Coordinated plant adaptation involves the interplay of multiple traits driven by habitat-specific selection pressures. Pleiotropic effects, wherein genetic variants of a single gene control multiple traits, can expedite such adaptations. Until present, only a limited number of genes have been reported to exhibit pleiotropy. Here, we create a recombinant inbred line (RIL) population derived from two Arabidopsis thaliana (A. thaliana) ecotypes originating from divergent habitats. Using this RIL population, we identify an allelic variation in a MADS-box transcription factor, SHORT VEGETATIVE PHASE (SVP), which exerts a pleiotropic effect on leaf size and drought-versus-humidity tolerance. Further investigation reveals that a natural null variant of the SVP protein disrupts its normal regulatory interactions with target genes, including GRF3, CYP707A1/3, and AtBG1, leading to increased leaf size, enhanced tolerance to humid conditions, and changes in flowering time of humid conditions in A. thaliana. Remarkably, polymorphic variations in this gene have been traced back to early A. thaliana populations, providing a genetic foundation and plasticity for subsequent colonization of diverse habitats by influencing multiple traits. These findings advance our understanding of how plants rapidly adapt to changing environments by virtue of the pleiotropic effects of individual genes on multiple trait alterations.

关键词： Arabidopsis Evolution leaf size Drought tolerance SVP Pleiotropic

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Shoot-level biomass allocation is affected by shoot type in Fagus sylvatica

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Journal of Plant Ecology 2012年第4期5卷 422-428页

作者： Benjamín Jarcuska Ruben Milla Institute of Forest Ecology Slovak Academy of SciencesSturova 296053 ZvolenSlovakia Area de Biodiversidad y Conservacion Universidad Rey Juan Carlosc/Tulipan s/n.E-28933 Mostoles(Madrid)Spain

Aims The present study aims(i)to examine if recently reported interspecific shoot-level biomass allocational trade-offs,*** trade-offs between leaf mass(LM)and stem mass(SM)and between leaf size and leaf number,hold intraspecifically and(ii)to explore whether those scaling relationships are independent of shoot type(*** *** shoots).Methods In order to address our questions,we used Fagus sylvatica saplings growing under a broad light range that were sampled in theWestern Carpathians Mountains(Slovakia).Important Findings We found that:(i)intraspecific shoot-level biomass allocational trade-offs differ from those reported interspecifically and that(ii)long and short shoots differ in biomass allocation scaling *** relationships with slopes statistically smaller than 1.0 or higher than-1.0,were found between SM and LM and between mean leafing intensity and individual leaf mass,respectively,in long *** contrast,isometric scaling was found in short *** suggests that leaf mass in short shoots is unaffected by shoot stem mass,in contrast to long *** shoots also had a larger fraction of biomass allocated to *** shoots,as has been observed in other shoot dimorphic species,are specialized,with short shoots specializing in carbon gain and long shoots in space acquisition.A greater shift in LM than in SM among species during speciation shifting from allometric intraspecific relationships to an isometric interspecific scaling relationship between those traits could explain the discrepancies between the outputs of the present intraspecific study and others similar *** study draws attention to the importance of considering shoot types in future studies dealing with allocation rules in species with dimorphic shoots.

关键词： biomass allocation dimorphic shoots leaf size stem size scaling relationships

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Downregulation of multiple CDK inhibitor ICK/KRP genes upregulates the E2F pathway and increases cell proliferation,and organ and seed sizes in Arabidopsis

Downregulation of multiple CDK inhibitor ICK/KRP genes upreg...

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第十四届全国植物基因组学大会

作者： Yan Cheng Ling Cao Sheng Wang Yongpeng Li Xianzong Shi Han Liu Lixia Li Zhengli Zhang Larry C.Fowke Hong Wang Yongming Zhou National Key Laboratory of Crop Genetic Improvement College of Plant Science and TechnologyHuazhong Agricultural University Dept.of Biochemistry University of Saskatchewan Dept.of Biology University of Saskatchewan

The ICK/KRP cyclin-dependent kinase(CDK) inhibitors are important plant cell cycle factors sharing only limited similarity with the metazoan CIP/KIP family of CDK *** is known about the specific functions of different... 详细信息

关键词： cell cycle cell size cyclin-dependent kinase inhibitor ICK/KRP leaf size plant growth RBR1 and E2F seed size

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Differentially expressed protein profile of maize seedling leaves between hybrid and its parental lines

Differentially expressed protein profile of maize seedling l...

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第十四届全国植物基因组学大会

作者： Baojian Guo Zhipeng Sui Yangyang Li Wenwen Yan Huimin Li Qixin Sun Zhongfu Ni State Key Laboratory for Agrobiotechnology China Agricultural UniversityNational Plant Gene Research Centre(Beijing)Key Laboratory of Crop Heterosis and UtilizationMinistry of EducationBeijing Key Laboratory of Crop Genetic Improvement

To give an insight into the molecular basis of leaf size heterosis,differentially expressed protein profile of the third leaf on 5th day after germination between maize hybrid Mo17/b73 and its parental lines used for ... 详细信息

关键词： maize leaf size heterosis differentially expressed protein

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