强化紫外B辐射减轻了由Magnaporthe oryzae感染引起的水叶的结构损伤
Yongmei He1, Hongru Li1, Jiong Wu1
1College of Resources and Environment, Yunnan Agricultural University, Kunming, 650201, Yunnan, China.
Protoplasma
|July 10, 2023
概括
增强的紫外B (UV-B) 辐射可以保护大米免受Magnaporthe oryzae感染. 在感染前或感染期间应用UV-B可增强大米叶的耐药性,改善形态和减轻病原体引起的损伤.
科学领域:
- 植物病理学 植物病理学
- 环境压力生物学
- 农作物科学 农作物科学
背景情况:
- 增强的紫外B (UV-B) 辐射影响作物-病原体相互作用.
- 麦格纳波特虫 (Magnaporthe oryzae) 会对大米叶造成重大损害,影响其形态和超结构.
研究的目的:
- 研究增强的UV-B辐射和M. oryzae感染对大米叶形态,解剖和超结构的影响.
- 为了确定UV-B照射时间对大米对M. oryzae的耐药性的影响.
主要方法:
- 米植物受到增强的UV-B辐射 (5.0 kJ·m−2) 和M. oryzae感染的单一和联合压力.
- 分析了大米叶的形态,解剖和超结构变化.
- 紫外线B应用的时间 (感染前,感染期间或感染后) 是不同的.
主要成果:
- 仅仅M. oryzae感染就减少了叶片面积,厚度,口腔密度,并导致超结构性损伤,包括叶绿体变形.
- 在M. oryzae感染前或感染期间应用的UV-B减少了病原体负荷,增加了叶面积和厚度,改善了口腔密度,并保护了叶绿体.
- 在M. oryzae感染后应用的UV-B显示保护作用减弱.
结论:
- 强化紫外线B辐射应用的时间对于其对米中的M. oryzae的保护作用至关重要.
- 在M. oryzae感染之前或感染期间应用UV-B可增强大米叶对病原体的抵抗力.
- 强化UV-B辐射可以是一个可行的策略,以减轻M. oryzae诱导的米损害,当战略性地应用时.
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