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商业蔬菜未发芽和发芽的种子中的内生菌细菌群体
Jacquelinne J Acuña1,2,3, Jingming Hu4,5, Nitza G Inostroza1
1Laboratorio de Ecología Microbiana Aplicada (EMALAB), Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Ave. Francisco Salazar, 01145, Temuco, Chile.
Scientific reports
|November 14, 2023
概括
智利蔬菜种子含有多种不同的内菌. 这些微生物显示出促进植物生长和生物控制的潜力,突出显示了它们对早期植物发育和作物健康的重要性.
科学领域:
- 微生物学 微生物学
- 植物科学 植物科学
- 农业科学 农业科学
背景情况:
- 智利是全球主要的种子出口国,但蔬菜的种子微生物组仍未得到充分研究.
- 种子内菌在植物早期发育中的作用在很大程度上是未知的.
研究的目的:
- 研究智利蔬菜种子 (阿皮亚,阿斯特拉,布拉西卡,索拉纳) 中的内菌群落.
- 分析未发芽和发芽种子中的细菌组成,多样性和潜在功能.
- 评估孤立的内菌的植物生长促进和生物控制特征.
主要方法:
- 对16S rRNA基因进行DNA元编码分析,用于细菌识别.
- 细菌16S rRNA基因副本的量化.
- 阿尔法和β多样性分析 (Chao1,香农,辛普森,PCoA).
- 隔离和表征内菌株的功能特征.
主要成果:
- 内生细菌的丰富程度在每克10^4到10^8个基因拷贝之间.
- Pseudomonadota 和 Bacillota 是种子类型和状态中占主导地位的类型.
- 在未发芽和发芽的种子 (除了阿皮亚科科) 之间观察到β多样性的显著差异.
- 孤立的菌株表现出显著的植物生长促进 (10-64%) 和生物控制 (74-82%) 活动.
结论:
- 蔬菜种子中的内性细菌群体在丰富度,多样性,组成和功能方面表现出很高的变化.
- 发芽状态会影响种子内性细菌群落.
- 种子微生物组中的有益的内性细菌具有增强蔬菜发育和作物保护的潜力.
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