数字农科院2.0

Nitric Oxide As A Downstream S.ignaling Molecule In Brassinosteroid-Mediated V irus Susceptibility To Maize Chlorotic Mottle Virus In Maize

文献类型： 外文期刊

作者： Zhou, Xueping;Zhou, Xueping;Cao, Ning;Zhan, Binhui

作者机构：

关键词： maize chlorotic mottle virus; brassinosteroid; nitric oxide; virus susceptibility

期刊名称： VIRUSES-BASEL

ISSN： 1999-4915

年卷期： 2019 年 11 卷 4.0 期

页码：

收录情况： JCR（2021版）

摘要： Maize chlorotic mottle virus (MCMV) infection causes growth abnormalities in maize. Transcriptome sequencing was conducted to compare the global gene expression of MCMV-inoculated plants with that of mock-inoculated plants. Data analyses showed that brassinosteroid (BR)-associated genes were upregulated after MCMV infection. Exogenous 2,4-epibrassinolide (BL) or brassinazole (BRZ) applications indicated that BR pathway was involved in the susceptibility to MCMV infection. In addition, treatment of BL on maize induced the accumulation of nitric oxide (NO), and the changes of NO content played positive roles in the disease incidence of MCMV. Moreover, MCMV infection was delayed when the BL-treated plants were applied with NO scavenger, which suggested that BR induced the susceptibility of maize to MCMV infection in a NO-dependent manner. Further investigation showed the maize plants with knock-down of DWARF4 (ZmDWF4, a key gene of BR synthesis) and nitrate reductase (ZmNR, a key gene of NO synthesis) by virus-induced gene silencing displayed higher resistance to MCMV than control plants. Taken together, our results suggest that BR pathway promotes the susceptibility of maize to MCMV in a NO-dependent manner.

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