种子内菌微生物Microbacterium testaceum M15增强了大米 (Oryza sativa L.) 的耐寒性和生长
Jintong Zhao1, Xiaoqing Liu2, Ligang Hou3
1Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Gembloux Agro-Bio Tech, University of Liege, TERRA - Teaching & Research Center, Plant Sciences, Gembloux 5030, Belgium; Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Microbiological research
|September 25, 2024
概括
种子内的微生物增强了大米的耐寒性. 微细菌testaceum M15显著改善了冷敏大米的发芽,生存和生理标记,为可持续农业提供了潜力.
科学领域:
- 农业微生物学 农业微生物学
- 植物生理学 植物生理学
- 压力生物学 压力生物学
背景情况:
- 种子内性微生物可以改善植物生长和弹性.
- 它们在缓解大米寒冷压力的作用尚不清楚.
- 微生物社区的复杂性在研究这些相互作用方面带来了挑战.
研究的目的:
- 在寒冷压力下的米品种中调查种子内性微生物多样性.
- 确定特定的微生物,赋予寒冷耐受性.
- 评估已识别的微生物在增强大米寒冷耐受性的有效性.
主要方法:
- 在寒冷敏感 (CB9) 和耐寒 (JG117) 品种的米中比较了内性微生物群落.
- 隔离并确定了一个耐寒的微生物,Microbacterium testaceum M15.
- 带有M15的注射CB9大米和评估在寒冷压力下生长,发芽,生存和生理参数.
主要成果:
- 在寒冷和室温下,JG117的微细菌菌的丰度高于CB9.
- 在JG117种子中发现了微细菌testaceum M15.
- 在14°C下,M15注射增加了CB9发芽率41.7%,在寒冷压力下 (4°C) 的生存率增加了194%.
- M15显著增加了叶绿素含量 (+30%),总蛋白质 (+16.31%) 和催化酶活性 (+26.15%),同时降低了MDA水平 (-37.76%).
结论:
- 种子内的微生物,特别是Microbacterium testaceum M15,可以显著提高米的耐寒性.
- M15改善了与寒冷应激反应相关的关键生理和生化标志物.
- 这些发现支持在可持续农业中使用有益的内微生物,并在寒冷地区提高大米生产率.
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