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收获后果 (Malus x Domestica) 的时间果微生物组和免疫力学动态

Roselane Kithan-Lundquist¹, Hannah M McMillan², Sheng-Yang He^1,3,4,5

¹Department of Microbiology, Genetics, and Immunology, Michigan State University, East Lansing, MI, USA.

Horticulture research

|April 28, 2025

概括

收获后,水果的免疫力下降,允许腐烂微生物生长. 增强这种植物免疫反应可以帮助保持水果的质量并延长保质期.

科学领域:

植物病理学植物病理学
微生物学微生物学
收获后的生物学

背景情况:

植物免疫反应对于保持健康的微生物群至关重要.
收获后对水果免疫力和微生物群相互作用的了解有限.
收获后的水果健康受到水果的免疫系统及其相关微生物的影响.

研究的目的:

在收获后储存期间调查果实微生物群和宿主防御基因表达的时间动态.
了解水果免疫力崩和腐烂微生物的繁殖之间的关系.
探索提高水果质量和保质期的策略.

主要方法:

在果收获后储存期间分析细菌和真菌社区组成.
随着时间的推移,监测宿主防御基因表达,特别是模式触发免疫 (PTI).
使用flg22来试验PTI的诱导,以评估其对病原体耐药性的影响.

主要成果:

在储存期间观察到细菌和真菌群体的显著变化.
PTI基因表达的下降与微生物组成的变化相关.
假定破坏性微生物 (例如,Alternaria,Gluconobacter,Acetobacter) 增加,而潜在的有益微生物减少.
人工PTI诱导延迟了由Penicillium expansum引起的水果腐烂.

结论:

水果的免疫反应有助于塑造水果微生物组.
收获后水果免疫的崩导致腐烂微生物的繁殖和水果腐烂的增加.
这些发现表明了通过免疫系统调节来改善水果质量和延长保质期的潜在策略.

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