异烯通过启动植物激素反应来阻止昆虫食草
Abira Sahu1,2,3, Mohammad Golam Mostofa1,2,4,5, Yuan Xu1
1Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI, USA.
Science advances
|April 18, 2025
概括
释放异烯的植物通过阻碍毛虫生长和启动素酸 (JA) 防御来阻止昆虫食草. 这种植物防御机制在昆虫攻击期间保持了光合作用效率.
科学领域:
- 植物生物学 植物生物学
- 生态生态学 生态生态学
- 生物化学 生物化学
背景情况:
- 植物释放异烯,一种挥发性化合物,已知可以阻止昆虫食草.
- 基础上的特定的生化和生理机制异烯介导的植物防御昆虫并没有完全理解.
研究的目的:
- 为了研究异在植物防御昆虫草食的作用.
- 阐明与异烯介导的草食动物耐药性相关的生化和生理反应.
主要方法:
- 使用工程控制烟草植物排放异二烯 (IE) 和非排放 (NE).
- 评估了IE和NE植物上的角虫生长和食偏好.
- 测量了莉酸 (JA) 含量和光合作用同化率,以应对草食.
- 分析了伤口诱导的异二烯排放和相关的代谢物变化.
主要成果:
- 与NE植物相比,与IE植物相比,角幼虫的生长出现了缩.
- 昆虫更喜欢吃NE的叶子,这表明异烯具有威作用.
- 食虫诱导了IE叶子中JA的较大增加,这表明JA-priming.
- 在草食期间,IE植物保持了稳定的同化率,这表明异烯在光合作用中的保护作用.
- 伤口诱导的异烯排放与异烯生物合成途径代谢物水平的增加有关.
结论:
- 异烯在植物对抗昆虫草食的防御中起着重要作用.
- 异原始化素酸 (JA) 信号通路,增强植物的耐药性.
- 异烯有助于维持植物生理功能,特别是光合作用效率,在草食动物的攻击下.
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