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Plant cuticles repress organ initiation and development during skotomorphogenesis in Arabidopsis

Plant Communications 2024年第6期5卷 100-116页

作者： Yuru Ma Wenwen Chang Yongpeng Li Jiahui Xu Yongli Song Xinmiao Yao Lei Wang Yu Sun Lin Guo Hao Zhang Xigang Liu Ministry of Education Key Laboratory of Molecular and Cellular Biology College of Life SciencesHebei Normal UniversityShijiazhuangHebei 050024China Hebei Research Center of the Basic Discipline of Cell Biology College of Life SciencesHebei Normal UniversityShijiazhuangHebei 050024China Hebei Collaboration Innovation Center for Cell Signaling and Environmental Adaptation College of Life SciencesHebei Normal UniversityShijiazhuangHebei 050024China Hebei Key Laboratory of Molecular and Cellular Biology College of Life SciencesHebei Normal UniversityShijiazhuangHebei 050024China State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuangHebei 050021China

After germination in the dark,plants produce a shoot apical hook and closed cotyledons to protect the quiescent shoot apical meristem(SAM),which is critical for seedling survival during *** factors that coordinate these processes,particularly SAM repression,remain *** cuticles,multilayered structures of lipid components on the outermost surface of the aerial epidermis of all land plants,provide protection against desiccation and external environmental *** and how cuticles regulate plant development are still ***,we demonstrate that mutants of BODYGUARD1(BDG1)and long-chain acyl-CoA synthetase2(LACS2),key genes involved in cutin biosynthesis,produce a short hypocotyl with an opened apical hook and cotyledons in which the SAM is activated during *** signaling represses expression of BDG1 and LACS2,as well as cutin *** analysis revealed that cuticles are critical for skotomorphogenesis,particularly for the development and function of *** and molecular analyses showed that decreased HOOKLESS1 expression results in apical hook opening in the *** hypoxia-induced expression of LITTLE ZIPPER2 at the SAM promotes organ initiation in the mutants,the de-repressed expression of cell-cycle genes and the cytokinin response induce the growth of true *** results reveal previously unrecognized developmental functions of the plant cuticle during skotomorphogenesis and demonstrate a mechanism by which light initiates photomorphogenesis through dynamic regulation of cuticle synthesis to induce coordinated and systemic changes in organ development and growth during the skotomorphogenesis-to-photomorphogenesis transition.

关键词： plant cuticles SAM quiescence organ initiation skotomorphogenesis photomorphogenesis

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