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Updated: Jun 18, 2025

Genome-wide Analysis of Histone Modifications Distribution using the Chromatin Immunoprecipitation Sequencing Method in Magnaporthe oryzae
Published on: June 2, 2021
A key component Rxt3 in the Rpd3L histone deacetylase complex regulates development, stress tolerance, amylase
Chaofeng Chang1, Herui Wang1, Yiling Liu1
1Engineering Technological Center of Fungus Active Substances of Fujian Province, College of Biological Sciences and Technology, Minnan Normal University, Zhangzhou, 363000, China.
Abstract:
Rpd3L is a highly conserved histone deacetylase complex in eukaryotic cells and participates in various cellular processes. However, the roles of the Rpd3L component in filamentous fungi remain to be delineated ultimately. In this study, we constructed two knockout mutants of Rpd3L's Rxt3 subunit and characterized their biological functions in A. oryzae. Phenotypic analysis showed that AoRxt3 played a positive role in hyphal growth and conidia formation. Deletion of Aorxt3 resulted in augmented tolerance to multiple stresses, including cell wall stress, cell membrane stress, endoplasmic reticulum stress, osmotic stress and oxidative stress. Noteworthily, we found that Aorxt3-deleting mutants showed a higher kojic acid production than the control strain. However, the loss of Aorxt3 led to a significant decrease in amylase synthesis. Our findings lay the foundation for further exploring the role of other Rpd3L subunits and provide a new strategy to improve kojic acid production in A. oryzae.
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