对耐受性-抗性权衡的分子约束:有成本吗?
1Department of Evolution, Ecology and Behavior University of Illinois at Urbana-Champaign Urbana Illinois USA.
Plant-environment interactions (Hoboken, N.J.)
|December 13, 2023
概括
移除植物防御物英多尔葡萄糖酸盐,显著增加了94%的植物健康补偿. 这表明,在植物中,与维持耐药性和耐受性战略相关的健身成本.
科学领域:
- 植物生物学 植物生物学
- 化学生态化学生态学
- 进化生物学是进化的生物学.
背景情况:
- 植物对草食动物采用各种防御机制,包括化学耐药性和耐受性 (再生生长).
- 植物的耐药性和耐受性通常通过共享的分子通路联系在一起,例如氧化酸通路.
- 由于共享资源分配,维持抵抗和耐受性可能会产生健康成本.
研究的目的:
- 调查与维持植物耐药性和耐受性策略相关的健康成本.
- 评估消除印糖酸盐生产对植物健康补偿的影响.
主要方法:
- 使用了cyp79B2和cyp79B3的双重淘汰突变,这些酶是印度醇葡萄糖酸盐生物合成中的关键酶.
- 在突变植物中,醇葡萄糖酸盐被消除,从而降低了它们的抵抗力.
- 在草食动物损伤后,突变植物与野生类型哥伦比亚-0相比的健身补偿.
主要成果:
- 淘汰英多尔葡萄酸盐产量导致健身补偿增加了大约94%.
- 伤害后的cyp79B2/cyp79B3双重淘汰将植物从低补偿转变为过度补偿的基因型.
- 这表明在维持基于英多尔葡萄糖酸盐的耐药性方面存在很大的健身成本.
结论:
- 植物在维持抗性和耐受性策略时都会产生健康成本.
- 消除一个关键的抵抗路径 (英多尔葡萄糖酸盐) 可以导致过度补偿,突出了植物防御中的权衡.
- 需要进一步的研究来阐明这些观察到的健身权衡的机制基础.
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