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Article Abstract
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 () and investigated its role in the response of maize to infection by the Southern corn leaf blight pathogen .
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 -silenced (FoMV:) and -overexpressing (FoMV:-VOX) lines. FoMV: lines showed enhanced infection and an inhibited chitin-induced reactive oxygen species burst, whereas FoMV:-VOX lines exhibited the opposite effects. Furthermore, overexpression induced the expression of various pathogenesis-related genes, suggesting that these genes enhance resistance against . Transcriptome analysis of -silenced plants revealed that the differentially expressed genes were predominantly enriched in photosynthesis-related pathways, pointing to a role for photosynthesis in resistance.
Conclusions: These results suggest that ZmH2B positively regulates maize resistance to .
Supplementary Information: The online version contains supplementary material available at 10.1186/s12870-025-07020-9.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12362849 | PMC |
| http://dx.doi.org/10.1186/s12870-025-07020-9 | DOI Listing |
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