外源性黑色素调节大米对植物养昆虫压力反应的反应
Rahmatullah Jan1, Sajjad Asaf2, Saleem Asif3
1Coastal Agriculture Research Institute, Kyungpook National University, Daegu, South Korea.
Plant, cell & environment
|December 12, 2025
概括
外源性黑激素的应用显著提高了对白背植物 (WBPH) 的抗性. 这种植物激素增强了生存,减少了害虫殖民,并激活了多种防御机制,为作物保护提供了有前途的战略.
科学领域:
- 植物科学 植物科学
- 昆虫学 昆虫学是一门学科.
- 生物化学 生物化学
背景情况:
- 白背虫 (WBPH) 是大米的主要害虫,导致大量的产量损失.
- 黑激素是一种具有已知的信号功能的植物激素,但其在植物对WBPH防御中的作用尚不清楚.
研究的目的:
- 为了调查外源性黑激素对大米中的WBPH的防御作用.
- 为了阐明底层的生理,生化和分子机制,黑色素诱导的抵抗.
主要方法:
- 外源性黑激素在米幼苗中的应用.
- 评估WBPH的生存,殖民和症状的发展.
- 测量氧化应激标记物 (H2O2,O2•-),相对含水量和电解质泄漏.
- 对安托西亚宁生物合成,内源性黑激素合成和植物激素水平 (ABA,SA,JA) 的分析.
- 对抗氧化酶活动和GABA分流代谢的评估.
主要成果:
- 黑素的应用增加了米苗的存活率高达384%,并减少了93%的WBPH殖民.
- 黑色素减轻了氧化损伤,改善了水分含量,减少了电解质泄漏.
- 黑色素刺激了氨酸和内源性黑色素生物合成,并调节了植物激素通路 (ABA,SA,JA).
- 观察到增强的抗氧化能力和恢复的平衡,以及通过GABA分流增加的顺酸积累.
结论:
- 外源性黑激素通过整合多种防御策略,为米提供了对WBPH的显著保护.
- 黑色素通过协调调节生长,防御信号,抗氧化活性和离子平衡来增强植物的弹性.
- 黑色素显示出作为生物调节剂的潜力,可以改善大米对花粉食昆虫的抵抗力.
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