PEG模拟干旱胁迫下藜麦萌发期抗旱性评价

Drought Resistance Evaluation of Quinoa during Germination under PEG Simulated Drought Stress

【目的】研究与评价PEG模拟干旱胁迫下10个藜麦品种的萌芽期抗旱性。【方法】采用5%~30%不同浓度PEG-6000溶液模拟干旱胁迫条件。【结果】低浓度PEG-6000对藜麦种子萌发及根长具有促进作用,对茎长有一定的抑制作用。随着PEG-6000浓度增大,所有抗旱指标均下降。【结论】利用隶属函数分析得出,10个藜麦品种萌发期抗旱性强弱顺序为:YL2>YL1>YL7>YL3>YL9>YL5>YL10>YL6>YL8>YL4。为较好的反映藜麦品种在不同胁迫程度的耐受能力,将10个藜麦品种划分为三个抗旱级别:YL1、YL2、YL7为强耐旱品种;YL3、YL9为中等耐旱品种;YL4、YL5、YL6、YL8、YL10为弱耐旱品种。

【Objective】 Study the drought resistance of 10 quinoa varieties in germination stage.【Method】 In this experiment, PEG-6000 solution with different concentrations of 5%-30% were used to simulate drought stress conditions.【Result】 The results showed that the low concentrations of PEG-6000 promoted seed germination and root length of quinoa and inhibited stem length.【Conclusion】 According to the analysis of membership function, drought resistance of 10 quinoa varieties at germination stage was: YL2>YL1>YL7>YL3>YL9>YL5>YL10>YL6>YL8>YL4. The quinoa varieties were divided into three drought resistance levels: YL1 , YL2 and YL7 were drought-tolerant varieties,YL3 and YL9 were medium drought-tolerant varieties,YL4, YL5, YL6, YL8 and YL10 were weak drought-tolerant varieties.