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大豆在不同光照强度下响应大豆花叶病毒感染时平衡了生长与防御。

Soybean balanced the growth and defense in response to SMV infection under different light intensities.

作者信息

Shang Jing, Zhao Lu-Ping, Yang Xin-Miao, Qi Xiao-Li, Yu Jin-Feng, Du Jun-Bo, Li Kai, He Cheng-Shan, Wang Wen-Ming, Yang Wen-Yu

机构信息

Sichuan Engineering Research Center for Crop Strip Intercropping System and College of Agronomy, Sichuan Agricultural University, Chengdu, China.

National Center for Soybean Improvement, National Key Laboratory for Crop Genetics and Germplasm Enhancement, Key Laboratory of Biology and Genetic Improvement of Soybean, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China.

出版信息

Front Plant Sci. 2023 Apr 19;14:1150870. doi: 10.3389/fpls.2023.1150870. eCollection 2023.

DOI:10.3389/fpls.2023.1150870
PMID:37152165
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10154679/
Abstract

Light is essential for the growth and defense of soybean. It is not clear how soybeans adjust their defenses to different light environments with different cropping patterns. The mechanism of soybean response to (SMV) infection under different light intensities was analyzed by RNA-seq sequencing method. Enrichment analysis illustrated that most defense-related genes were down-regulated in the dark and the shade, and up-regulated under hard light and normal light. Soybean can resist SMV infection mainly by activating salicylic acid signaling pathway. Light is essential for activating salicylic acid defense signaling pathways. With the increase of light intensity, the oxidative damage of soybean leaves was aggravated, which promoted the infection of virus. When light was insufficient, the growth of soybean was weak, and the plant-pathogen interaction pathway, MAPK pathway and hormone defense pathway in infected soybean was inhibited. Under hard light, some defense genes in infected soybean were down-regulated to reduce the degree of oxidative damage. The expression of differentially expressed genes was verified by real-time fluorescence quantitative RT-PCR. In order to adapt to the change of light intensity, soybean balanced allocation of resources between growth and defense through a series regulation of gene expression. The results of this study will provide a theoretical basis for the research of SMV resistance in intercropping soybean.

摘要

光照对大豆的生长和防御至关重要。目前尚不清楚大豆如何针对不同种植模式下的不同光照环境调整其防御机制。通过RNA测序方法分析了不同光照强度下大豆对大豆花叶病毒（SMV）感染的响应机制。富集分析表明，大多数与防御相关的基因在黑暗和遮荫条件下表达下调，而在强光和正常光照下表达上调。大豆主要通过激活水杨酸信号通路来抵抗SMV感染。光照对于激活水杨酸防御信号通路至关重要。随着光照强度的增加，大豆叶片的氧化损伤加剧，这促进了病毒的感染。当光照不足时，大豆生长较弱，受感染大豆中的植物-病原体相互作用途径、丝裂原活化蛋白激酶（MAPK）途径和激素防御途径受到抑制。在强光下，受感染大豆中的一些防御基因表达下调，以降低氧化损伤程度。通过实时荧光定量RT-PCR验证了差异表达基因的表达。为了适应光照强度的变化，大豆通过一系列基因表达调控在生长和防御之间平衡资源分配。本研究结果将为间作大豆抗SMV研究提供理论依据。

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