高粱油菜素类固醇受体BRI1突变体的分子和生理特性

IF 8.1 1区生物学 Q1 PLANT SCIENCES New Phytologist Pub Date : 2025-03-13 DOI:10.1111/nph.20443

Andrés Rico-Medina, Natalie Laibach, Juan B. Fontanet-Manzaneque, David Blasco-Escámez, Fidel Lozano-Elena, Damiano Martignago, Ana I. Caño-Delgado

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引用次数: 0

摘要

拟南芥（AtBRI1）和高粱（SbBRI1）中brassinosteroids （BR）受体的高序列和结构相似性促使我们研究BRI1在这两种生物中的功能保守作用。在拟南芥bri1突变体中引入高粱SbBRI1将缺陷生长和发育表型恢复到野生型水平。SbBRI1突变体在高粱的整个生命周期中表现出BR敏感性缺陷和植株生长发育受损。高粱初生根技术的胚胎分析可以以前所未有的方式追溯根的生长发育早期阶段，揭示了SbBRI1受体在分生组织发育过程中BR感知的功能保守作用。RNA-seq分析揭示了SbBRI1通路在细胞生长过程中细胞壁生物发生中的下游调控。总之，这些结果揭示了高粱SbBRI1蛋白在植物生长发育中发挥功能保守作用，同时鼓励了高粱BR通路的研究及其对提高谷类作物抗逆性的影响。

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Molecular and physiological characterization of brassinosteroid receptor BRI1 mutants in Sorghum bicolor

The high sequence and structural similarities between BRASSINOSTEROID INSENSITIVE 1 (BRI1) brassinosteroid (BR) receptors of Arabidopsis (AtBRI1) and sorghum (SbBRI1) prompted us to study the functionally conserved roles of BRI1 in both organisms.
Introducing sorghum SbBRI1 in Arabidopsis bri1 mutants restores defective growth and developmental phenotypes to wild-type levels.
Sorghum mutants for SbBRI1 show defective BR sensitivity and impaired plant growth and development throughout the entire sorghum life cycle. Embryonic analysis of sorghum primary root techniques permits to trace back root growth and development to early stages in an unprecedented way, revealing the functionally conserved roles of the SbBRI1 receptor in BR perception during meristem development. RNA-seq analysis uncovers the downstream regulation of the SbBRI1 pathway in cell wall biogenesis during cell growth.
Together, these results uncover that the sorghum SbBRI1 protein plays functionally conserved roles in plant growth and development, while encouraging the study of BR pathways in sorghum and its implications for improving resilience in cereal crops.

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来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

发文量

728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.