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通过Aabrm1介导的黑色素合成对于Alternaria alternata的生长和发育,应激适应和病原性至关重要

Rong Li¹, Yongcai Li¹, Wenyi Xu¹

¹College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China.

Frontiers in microbiology

|January 26, 2024

概括

酶赛他隆脱水酶 (brm1) 对于梨黑斑真菌Alternaria alternata中黑色素的产生至关重要. 它的缺失显著降低了黑色素,损害了真菌感染,并增加了对氧化应激的敏感性.

科学领域:

植物病理学植物病理学
菌类学菌类学是指菌类学.
生物化学生化学

背景情况:

锡塔隆脱水酶 (brm1) 在真菌中对1,8-二氧纳乙烯 (DHN) 黑色素合成至关重要.
它在梨黑点病原体*Alternaria alternata*中的特定作用仍然在很大程度上未被描述.

研究的目的:

在*Alternaria alternata*中调查赛他隆脱水酶 (Aabrm1) 的功能.
确定Aabrm1对黑色素生物合成,真菌发育,抗压力和致病性的影响.

主要方法:

在A. alternata*中克隆和识别了Aabrm1*基因.
产生和分析一个 *Aabrm1*-删除突变 (Δ*Aabrm1*).
评估黑色素的生产,殖民地形态,感染结构,抗压力和毒性.

主要成果:

删除*Aabrm1*显著降低了黑色素的产生,导致色的光滑子.
这种 Δ*Aabrm1* 突变体表现出受损的感染结构形成和减少的透能力.
在 Δ*Aabrm1* 中,对外部压力,特别是对氧化压力的抗性显著减弱,H2O2和O2−水平增加.
在未受伤的梨叶上病毒性降低,但在受伤的梨果上不受影响.

结论:

*Aabrm1*介导的DHN黑色素合成对*A. alternata*的致病性至关重要.
黑色素在保护真菌免受氧化应激和促进感染方面发挥作用,特别是在完整的植物表面.

关键词:

另一个是Alternaria alternata.一个brm1一个brm1 感染感染的感染.黑色素是什么黑色素是什么氧化应激是一种氧化应激.毒性毒性是一种毒性.

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