长白参根芽孢杆菌CclA损失在提高绿豆抗枯枯性中的作用。

IF 6.3 1区 生物学 Q1 PLANT SCIENCES
Xinyu Xie, Chenxi Ma, Shan Liu, Ying Gao, Rui Cao, Yu Zhang, Fujuan Feng, Yanfeng Hu, Wei Meng, Lijian Xu
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引用次数: 0

摘要

枯丝核菌是一种土传病原菌,对多种重要经济作物造成破坏性病害。有益的植物和真菌相互作用被公认可以增强植物对生物胁迫的抗性。然而,潜在的机制尚未完全了解,特别是真菌表观遗传调控的贡献仍然知之甚少。本研究认为,长白螺杆藻是一种促进绿豆生长的有益菌,能够增强绿豆对枯枯病的抗性。CclA是COMPASS复合物中参与H3K4甲基化的一个亚基,敲除CclA可降低长白螺杆菌中H3K4me1和h3k4me3的水平,并抑制真菌的生长和分生。然而,PcCclA缺失增强了根定植并进一步增强了抗病性,这与木质素含量增强、干细胞木质素化和活性氧(ROS)清除能力相关,表明启动防御反应增强。综上所述,我们的研究结果不仅支持了PcCclA在真菌生长调控中的保守功能,而且还证明了PcCclA介导的H3K4甲基化在宿主防御启动中的作用,这加深了对真菌表观遗传调控在植物-有益真菌相互作用中的重要性的认识。同时,我们还提出了一种通过表观遗传工程增强植物有益真菌启动防御反应的策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Role of CclA Loss in Parametarhizium changbaiense in Enhancing Priming Resistance of Mung Bean Against Damping Off Induced by Rhizoctonia solani.

Rhizoctonia solani is a soil-borne pathogen causing destructive diseases on various economically important crops. Beneficial plant and fungus interactions are well acknowledged to enhance plant resistance to biotic stresses. However, the underlying mechanisms are not fully understood, especially the contribution of fungal epigenetic regulation remains poorly understood. Here, we characterized Parametarhizium changbaiense as a beneficial fungus that promoted mung bean growth and priming resistance to damping off caused by R. solani. Knockout of CclA, a subunit of the COMPASS complex involved in H3K4 methylation, reduced the H3K4me1 and 3 levels in P. changbaiense and diminished the fungal growth and conidiation. However, PcCclA deletion enhanced the root colonisation and further bolstered disease resistance, which correlated with intensified lignin content, lignification in the stem cells, and reactive oxygen species (ROS) scavenging ability, indicating a boost in priming defense responses. Taken together, our findings not only supported a conserved function of PcCclA in fungal growth regulation, but also demonstrated the role of PcCclA-mediated H3K4 methylation in host defense priming, which deepens the understanding of the importance of fungal epigenetic regulation in the plant-beneficial fungus interaction. Meanwhile, we also provided a strategy to enhance priming defense response through epigenetic engineering of plant-beneficial fungi.

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来源期刊
Plant, Cell & Environment
Plant, Cell & Environment 生物-植物科学
CiteScore
13.30
自引率
4.10%
发文量
253
审稿时长
1.8 months
期刊介绍: Plant, Cell & Environment is a premier plant science journal, offering valuable insights into plant responses to their environment. Committed to publishing high-quality theoretical and experimental research, the journal covers a broad spectrum of factors, spanning from molecular to community levels. Researchers exploring various aspects of plant biology, physiology, and ecology contribute to the journal's comprehensive understanding of plant-environment interactions.
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