植物病原性无氧细菌使用芳香多基来进入有氧区域
Gulimila Shabuer1, Keishi Ishida1, Sacha J Pidot2
1Department of Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology (HKI), Jena, Germany.
Science (New York, N.Y.)
|November 7, 2015
概括
像Clostridium puniceum这样的植物病原体会造成大量的作物损失. 这些细菌产生克洛斯特鲁宾, 它们是抗生素, 帮助它们在有氧环境中生存, 减少植物疾病.
科学领域:
- 植物病理学
- 微生物学
- 代谢学
背景情况:
- 全球约有25%的蔬菜食物由于传染性植物疾病而丢失.
- 收获的作物,特别是土豆,容易受到无氧细菌的腐蚀,例如Clostridium puniceum,特别是在潮湿的条件下.
- 了解植物病原体的生存机制对于疾病管理至关重要.
研究的目的:
- 调查Clostridium puniceum对植物病变的相关代谢能力.
- 鉴定和描述这种无氧细菌产生的新代谢物.
- 阐明这些代谢物在病原体生存和植物疾病中的功能作用.
主要方法:
- 基因组分析以确定负责代谢物生成的基因位点 (II型多基合成酶).
- 代谢分析以分离和识别产生的多基化合物 (clostrubins).
- 对其他微生物植物病原体的克洛斯特鲁宾活性进行抗菌检测.
主要成果:
- 克洛斯特里有II型多基因合成基因位点.
- 这种位点产生独特的多基基化代谢物,称为clostrubins.
- 克洛斯特鲁宾对其他微生物植物病原体具有抗生素特性,并促进Clostridium puniceum在富含氧气的环境中生存.
结论:
- 克洛斯特鲁宾是一种由植物病原体Clostridium puniceum产生的新型抗生素.
- 这些代谢物为有氧植物组织中的无氧细菌提供了生存优势.
- 这些发现提供了Clostridium puniceum的致病机制和控制土豆腐的潜在目标.
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