接近环境的相互作用O3,升高的CO2和宿主对冬季小麦的叶子生的抵抗力
Alsayed M Mashaheet1,2, Kent Burkey3, David Marshall4
1Damanhour University Faculty of Agriculture, Plant Pathology, Damanhour, Beheira, Egypt.
Plant disease
|February 5, 2026
概括
接近环境的臭氧 (O3) 和高的二氧化碳 (CO2) 可以加剧小麦叶. 高水平的臭氧会导致明显的伤害,而结合的气体会增加易感小麦的疾病严重程度和瘤大小.
科学领域:
- 植物病理学 植物病理学
- 环境科学 环境科学
- 农业科学 农业科学
背景情况:
- 由Puccinia triticina (Pt) 引起的小麦叶 (LR) 是一个重要的农业疾病.
- 大气中温室气体度的上升,包括臭氧 (O3) 和二氧化碳 (CO2),可能会影响植物疾病的动态.
研究的目的:
- 调查近环境臭氧和未来预测的二氧化碳度对小麦叶的生严重程度和进展的影响.
- 评估不同小麦品种对臭氧暴露的反应,它们具有不同程度的LR抵抗力.
主要方法:
- 四种冬季小麦品种在受控温室条件下 (CSTR) 暴露于不同度的臭氧 (亚环境为100ppb).
- 近环境臭氧 (50ppb) 和高CO2 (570ppm) 的长期影响在户外植物环境室 (OPEC) 中对接种的小麦植物进行了评估.
- 疾病的严重程度,瘤的大小和形成率都是在旗叶上测量.
主要成果:
- 在所有测试品种中,在50ppb以上的度下,暴露于臭氧会引起明显的伤害症状.
- 耐品种NuEast在经过测试的气体处理过程中没有出现LR症状.
- 近环境臭氧,单独或与升高的二氧化碳相结合,显著增加了敏感品种Coker 9553的LR严重性,瘤大小和加速瘤发育.
- 单独增加的二氧化碳并没有显著影响疾病的严重程度.
结论:
- 暴露于臭氧,特别是高水平的臭氧,可以直接对小麦造成叶子损伤.
- 近环境臭氧和高CO2之间的相互作用可能会加剧小麦叶生流行病.
- 随着温室气体度的增加,未来的气候条件可能会对小麦生产构成更大的威胁,原因是疾病的增加.
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