根部分泌的核酸:是根球细菌的信号化疗吸引剂
Guy Keren1, Galit Yehezkel1, Lakkakula Satish1
1The Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
Frontiers in plant science
|May 27, 2024
概括
植物释放核化物,作为吸引有益和致病细菌到根区的信号. 这一发现揭示了在各种环境中微生物社区聚集的保存机制.
科学领域:
- 微生物学 微生物学
- 植物科学 植物科学
- 生物化学 生物化学
背景情况:
- 树根球微生物群对于植物健康和营养获取至关重要.
- 植物根释放的排泄物塑造了微生物群落.
- 调解根微生物相互作用的特定信号分子在很大程度上仍未被确定.
研究的目的:
- 为了识别根分泌的信号分子,这些分子会吸引根球细菌.
- 为了研究核酸在土壤细菌中介化学反应中的作用.
- 探索不同环境中核酸信号传递的保存性质.
主要方法:
- 有针对性的超高性能液态色谱-质谱/质谱 (UPLC-MS/MS) 用于检测植物根排泄物中的核化物.
- 从植物根中分离草根细菌,包括与菌根菌相关的菌根菌.
- 在实验室和土壤条件下,使用玻璃毛细血管和板板方法进行化学测试.
主要成果:
- 核化物和脱氧核化物在各种植物物种的根排泄物中被确定.
- 核化物诱导了各种有益和致病细菌的显著的积极化学反应,包括*Bacillus pumilus*, *Bacillus subtilis*, *Pseudomonas turukhanskensis*, *Serratia marcescens*, *Xanthomonas campestris* 和 *E. coli*. 这些细菌包括*Bacillus pumilus*, *Bacillus subtilis*, *Pseudomonas turukhanskensis*, *Serratia marcescens*, *Xanthomonas campestris* 和 *E. coli*.
- 核化物在土壤板测试中证明了长距离扩散和化学反应诱导,模仿自然条件.
结论:
- 根部分泌的核酸作为化学吸引剂,在组装树根球细菌群体中发挥关键作用.
- 核酸信号传递是跨王国的保存,通用机制,在植物相关的微生物和动物肠道细菌 (*E. coli*) 中观察到.
- 进一步研究核酸中介化学反应是有必要的,以了解和操纵树根球微生物组的动态.
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