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为生产用于树木防御的生物生成挥发性有机化合物的最佳季节性时间表
Yoh Iwasa1, Rena Hayashi1, Akiko Satake1
1Department of Biology, Faculty of Science, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan.
Journal of theoretical biology
|November 9, 2024
概括
树木在树叶中产生防御性化学物质,如单烯,以阻止害虫. 最佳的生产取决于缓慢的化学衰变和快速的光合作用,在威胁出现之前定时生产.
科学领域:
- 植物生物化学和生态学
- 化学生态化学生态学
- 林业和生态系统科学 林业和生态系统科学
背景情况:
- 树木会释放生物源的挥发性有机化合物 (BVOCs),以保护它们免受食草动物,病原体和热应激的影响.
- 以前的研究优化了异烯 (一种挥发性BVOC) 的生产,以减轻热量和增加碳.
- 这项研究的重点是缓慢腐烂,储存的BVOCs (单二烯,二烯) 在草食动物攻击时排放.
研究的目的:
- 确定树叶中储存的BVOC的最佳季节性生产计划.
- 分析衰变速率,光合作用速率和威胁大小对BVOC生产的影响.
- 为了解释不同物种和化学类型的BVOC生产的差异.
主要方法:
- 使用Pontryagin的最大原则进行数学建模.
- 分析最佳控制策略,包括单一的控制期.
- 影响BVOC合成的生态和生化因素的整合.
主要成果:
- 缓慢的衰变率和高的光合作用率有利于最佳的BVOC生产.
- 生产的BVOC的数量随着衰变的缓慢和光合作用的加快而增加,但与威胁大小并不是单调的.
- BVOCs是预防性地产生的,在威胁高峰期之前.
结论:
- 储存的BVOC生产的时间和数量是微调的,以平衡国防利益与生产成本.
- 模型预测与不同树木和化学物种中BVOCs观察到的变化保持一致.
- 了解这些动态对于预测森林对环境变化和草食的反应至关重要.
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