数字农科院2.0

Histone ZmH2B regulates resistance to the Southern corn leaf blight pathogen Bipolaris maydis in maize

文献类型： 外文期刊

作者： Ying Ding;Hongliang Wu;Na Ning;Haiyue Yu;Chaotian Liu;Ruoya Lv;Shu Li;Junjie Hao;Xintao Wang;Xuecai Zhang;Xin Xie;Xinfeng Li;Wende Liu;Zhiqiang Li

作者机构：

关键词： Bipolaris maydis;Maize;Transcriptome analysis;Virus-induced gene silencing and overexpression;ZmH2B

期刊名称： BMC Plant Biology

ISSN： 1471-2229

年卷期： 2025 年 25 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： Background: H2B histones play crucial roles in plant responses to biotic stress. However, to date, most research on H2B histones has focused on their roles in post-translational modification, and studies specifically investigating the intrinsic properties of these histones remain relatively limited. Here we identified the ZmH2B in maize (Zea mays) and investigated its role in the response of maize to infection by the Southern corn leaf blight pathogen Bipolaris maydis. Result: In this study, a nucleus-localized ZmH2B was identified from maize. To characterize the role of this histone in disease resistance, we employed virus-induced gene silencing (VIGS) and transient overexpression (VOX) to generate ZmH2B-silenced (FoMV:ZmH2B) and ZmH2B-overexpressing (FoMV:ZmH2B-VOX) lines. FoMV:ZmH2B lines showed enhanced B. maydis infection and an inhibited chitin-induced reactive oxygen species burst, whereas FoMV:ZmH2B-VOX lines exhibited the opposite effects. Furthermore, ZmH2B overexpression induced the expression of various pathogenesis-related genes, suggesting that these genes enhance resistance against B. maydis. Transcriptome analysis of ZmH2B-silenced plants revealed that the differentially expressed genes were predominantly enriched in photosynthesis-related pathways, pointing to a role for photosynthesis in B. maydis resistance. Conclusions: These results suggest that ZmH2B positively regulates maize resistance to B. maydis.

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