草食诱导的挥发物引起了利马豆叶中的防御基因
G Arimura1, R Ozawa, T Shimoda
1Bio-oriented Technology Research Advancement Institution, Tokyo, Japan.
Nature
|August 22, 2000
概括
被攻击的植物释放挥发性物质,这些挥发性物质为邻居提供防御. 利马豆叶在接触草食动物诱导的挥发物质时激活了防御基因,而不是人工伤害,揭示了特定的植物通信机制.
科学领域:
- 植物生物学 植物生物学
- 化学生态化学生态学
- 植物与昆虫的相互作用
背景情况:
- 植物释放挥发性物质,吸引草食动物的自然敌人.
- 邻近的植物可以通过挥发性物质来防御受损的同物种.
- 这种植物间交流的确切机制尚未完全理解.
研究的目的:
- 阐明利马豆植物对草食动物感染同类物质的挥发物反应的分子机制.
- 为了识别特定的挥发性化合物,涉及到植物防护初始化.
- 研究调解这种反应的信号通路.
主要方法:
- 未感染的利马豆叶暴露于蜘蛛感染和人工受伤的同类叶的挥发物.
- 对防御基因表达模式的分析.
- 确定关键的挥发性类物质.
- 研究流入和蛋白质酸化/脱酸化的作用.
主要成果:
- 未被感染的利马豆叶激活了五个防御基因,以应对来自食草动物感染植物的挥发物质,但不是人工受伤的植物.
- 基因表达模式模仿了由莉酸诱导的基因表达模式.
- 至少有三种特异性类被确定为关键激活剂,仅在草食期间释放.
- 基因表达取决于流入和蛋白质酸化/脱酸化.
结论:
- 在草食过程中释放的植物挥发物,特别是主要的邻近植物用于防御.
- 在这种植物间的沟通中,类是关键的信号分子.
- 流入和蛋白质酸化/脱酸化对于调解防御基因激活至关重要.
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