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Strigolactones modulate cotton fiber elongation and secondary cell wall thickening

Journal of Integrative Agriculture 2024年第6期23卷 1850-1863页

作者： Yunze Wen Peng He Xiaohan Bai Huizhi Zhang Yunfeng Zhang Jianing Yu College of Life Sciences Shaanxi Normal UniversityXi’an 710119China

Cotton is one of the most important economic crops in the world,and it is a major source of fiber in the textile ***(SLs)are a class of carotenoid-derived plant hormones involved in many processes of plant growth and development,although the functions of SL in fiber development remain largely ***,we found that the endogenous SLs were significantly higher in fibers at 20 days post-anthesis(DPA).Exogenous SLs significantly increased fiber length and cell wall ***,we cloned three key SL biosynthetic genes,namely GhD27,GhMAX3,and GhMAX4,which were highly expressed in fibers,and subcellular localization analyses revealed that GhD27,GhMAX3,and GhMAX4 were localized in the *** exogenous expression of GhD27,GhMAX3,and GhMAX4 complemented the physiological phenotypes of d27,max3,and max4 mutations in Arabidopsis,*** of GhD27,GhMAX3,and GhMAX4 in cotton resulted in increased numbers of axillary buds and leaves,reduced fiber length,and significantly reduced fiber *** findings revealed that SLs participate in plant growth,fiber elongation,and secondary cell wall formation in *** results provide new and effective genetic resources for improving cotton fiber yield and plant architecture.

关键词： strigolactones fiber elongation secondary cell wall thickening cotton

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ZmMs33 promotes anther elongation via modulating cell elongation regulators,metabolic homeostasis,and cell wall remodeling in maize

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The Crop Journal 2023年第2期11卷 361-373页

作者： Ziwen Li Taotao Zhu Shuangshuang Liu Lina Zhao Xueli An Yan Long Xun Wei Juan Zhang Zhenying Dong Xiangyuan Wan Research Center of Biology and Agriculture Shunde Graduate SchoolUniversity of Science and Technology BeijingBeijing 100024China Zhongzhi International Institute of Agricultural Biosciences Beijing 100192China Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding Beijing International Science and Technology Cooperation Base of Bio-Tech BreedingBeijing Solidwill Sci-Tech Co.Ltd.Beijing 100192China

Plant cell elongation depends on well-defined gene regulations,adequate nutrients,and timely cell wall *** size is positively correlated with the number and viability of pollen grains,while little is known about molecular mechanisms underlying anther cell ***,we found that properly activated cell elongation regulators at transcriptional levels in loss-of-function ZmMs33 mutant(ms33-6038)anthers failed to promote maize anther ***33 deficiency disrupted metabolic homeostasis mainly by inhibiting both photosynthesis in anther endothecium and lipid accumulation in anther ***,ms33-6038 anthers displayed ectopic,premature and excessive secondary cell wall thickening in anther middle layer,which constrained cell elongation structurally and blocked nutrient flows across different anther wall *** metabolic disorder was only found in ms33-6038 mutant rather than several representative male-sterility lines at transcriptional and post-translational ***,the disordered metabolisms and blocked nutrient flows defeated the activated cell elongation regulators,and finally inhibited anther elongation and growth with a unique‘‘idling effect”in ms33-6038 mutant.

关键词： ZmMS33 Anther cell elongation Metabolic homeostasis secondary cell wall thickening Male sterility Maize

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