监测杂草的机械和化学损伤压力,基于叶绿素光成像
Longzhe Quan1, Keyong Chen1, Tianbao Chen1
1College of Engineering, Anhui Agricultural University, Hefei, Anhui, China.
Frontiers in plant science
|May 31, 2023
概括
叶绿素光 (CF) 监测揭示了化学和机械压力如何影响杂草生理. 复杂的压力严重影响杂草的光合作用效率,为有针对性的杂草控制策略提供了见解.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 环境科学 环境科学
背景情况:
- 机械和化学损伤是主要的杂草控制方法.
- 叶绿素光 (CF) 提供了对杂草压力的非破坏性监测.
- 了解压力机制对于有效的杂草管理至关重要.
研究的目的:
- 在各种压力条件下调查*Digitaria sanguinalis*和*Erigeron canadensis*的CF参数的变化.
- 分析压力对不同杂草物种,叶子年龄和压力部位的影响.
- 确定化学,机械和联合压力对杂草生理学的影响.
主要方法:
- 模拟现场环境条件被用于应力应用.
- 杂草 (*D. sanguinalis*, *E. canadensis*) 在1-7天内受到化学,机械和联合压力.
- 叶绿素光参数每天使用叶绿素光仪测量.
主要成果:
- 7天后,化学压力导致叶子背部部分严重的光合作用抑制 (R=75%).
- 机械应力在1-2天后显示出一些参数恢复,抑制程度较小 (R=11%).
- 联合压力显著影响CF参数 (R=71%-73%在3-4天内),反映化学压力模式.
结论:
- CF技术有效地监测了杂草对不同压力的生理反应.
- 综合应力对杂草的光合作用效率产生了最显著和最快的影响.
- 结果指导有效的杂草控制操作和未来对压力机制的研究.
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