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ZmDRR206 functions in maintaining cell wall integrity during maize seedling growth and defense response to external stresses

文献类型： 外文期刊

作者： Zhong, Tao 1 ; Deng, Suining 1 ; Zhu, Mang 1 ; Fan, Xingming 2 ; Xu, Mingliang 1 ; Ye, Jianrong 1 ;

作者机构： 1.China Agr Univ, Ctr Crop Funct Genom & Mol Breeding, Natl Maize Improvement Ctr, Beijing 100193, Peoples R China

2.Yunnan Acad Agr Sci, Inst Food Crops, Kunming 650205, Yunnan, Peoples R China

关键词： Cell -wall integrity; Cell -wall biosynthesis; Dirigent protein ZmDRR206; Defense response; Seedling growth

期刊名称：CROP JOURNAL （ 影响因子：6.6； 五年影响因子：6.5 ）

ISSN： 2095-5421

年卷期： 2023 年 11 卷 6 期

页码：

收录情况： SCI

摘要： Plants adaptively change their cell wall composition , structure during their growth, development , interactions with environmental stresses. Dirigent proteins (DIRs) contribute to environmental adapta-tions by dynamically reorganizing the cell wall and/or by generating defense compounds. A maize DIR, ZmDRR206, was previously reported to play a dominant role in regulation of storage nutrient accumula-tion in endosperm during maize kernel development. Here we show that ZmDRR206 mediates maize seedling growth and disease resistance by coordinately regulating biosynthesis of cell wall components for cell-wall integrity (CWI) maintenance. Expression of ZmDRR206 was induced in maize seedlings upon pathogen infection. ZmDRR206 overexpression in maize resulted in reduced seedling growth and photo-synthetic activity but increased disease resistance and drought tolerance, revealing a tradeoff between growth and defense. Consistently, ZmDRR206 overexpression reduced the contents of primary metabo-lites and down-regulated genes involved in photosynthesis, while increasing the contents of major cell wall components, defense phytohormones, and defense metabolites, and up-regulated genes involved in defense and cell-wall biosynthesis in seedlings. ZmDRR206-overexpressing seedlings were resistant to cell-wall stress imposed by isoxaben, and ZmDRR206 physically interacted with ZmCesA10, which is a cellulose synthase unit. Our findings suggest a mechanism by which ZmDRR206 coordinately regu-lates biosynthesis of cell-wall components for CWI maintenance during maize seedling growth, and might be exploited for breeding strong disease resistance in maize.(c) 2023 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC -ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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