加拿大西部红春小麦作物干旱的叶子水关系和透调整
Gopal Sharma1, Gurcharn S Brar1, Thorsten Knipfer1
1<institution content-type="university">Faculty of Land and Food Systems, The University of British Columbia</institution>, <city>Vancouver</city>, <state>BC</state> <postal-code>V6T 1Z4</postal-code>, <country>Canada</country>.
Functional plant biology : FPB
|October 9, 2023
概括
加拿大西部红春小麦品种表现出不同能力的透调整 (OA),这是对抗干旱耐受性的关键特征.
科学领域:
- 植物生理学 植物生理学
- 农业学是一种农业学.
- 适应气候变化 适应气候变化
背景情况:
- 由于气候变化导致的干旱事件增加,小麦 (Triticum aestivum) 的产量受到威胁.
- 透调整 (OA) 是维持小麦水分,和在缺水的情况下生长的关键机制.
- 加拿大西部红春小麦 (CWRS) 在容易干旱的地区广泛种植.
研究的目的:
- 调查三种商业重要CWRS小麦品种的叶子透调整 (OA) 能力:"Superb"",Stettler"和"AAC Viewfield".
- 确定OA对这些品种干旱耐受性的贡献.
- 为了比较水关系参数和在缺水的情况下的口腔导电性.
主要方法:
- 测量叶子水关系参数:水潜力 (Ψ),溶解物潜力 (Ψs),口腔导电性 (gs) 和相对水含量 (RWC).
- 评估位 (P) 维护及其与溶液潜在变化的关系.
- 通过分析在缺水条件下叶子溶解物潜力的减少来评估OA容量.
主要成果:
- 这三种CWRS品种均在叶子水电位 (Ψ) 为-1.1MPa时达到零流量 (P).
- "超级"和"AAC视野"呈现出显著的OA,分别为0.53MPa和0.73MPa贡献维护.
- 在"斯特特勒"品种中没有发现OA的证据.
- 在缺水的情况下",AAC Viewfield"保持了比"Stettler"更高的口腔导电率 (gs),而"Superb"是中间的.
结论:
- 透调整 (OA) 能力的程度在CWRS小麦品种之间有所不同.
- "AAC视野"和"超级"显示出显著的OA,这表明干旱耐受性的潜力更高.
- "斯特特勒"似乎缺乏OA,这表明与其他两种品种相比,其干旱耐受性机制可能较低.
- 氧化是一种关键因素,有助于CWRS小麦的耐旱性.
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