不同澳洲坚果品种抗旱性的综合评价

Comprehensive Evaluation of Drought Resistance of Different Macadimia Varieties

以36个澳洲坚果品种为研究对象,在持续干旱胁迫下测定其9项生理指标,并运用隶属函数法对品种的抗旱性进行综合分析,结果表明,‘云澳7号’、‘云澳24号’、‘云澳36号’、‘云澳32号’、‘云澳17’号为高度抗旱品种,‘云澳29号’、‘云澳2号’、‘云澳19号’为抗旱性弱的品种,其余品种为中度抗旱。运用灰色关联分析与主成分分析法,对36个品种的抗旱性与9项指标的相关性进行了分析,结果表明,叶片相对含水量、可溶性糖含量、可溶性蛋白含量、超氧化物歧化酶、游离脯氨酸含量可作为36个澳洲坚果品种重要的抗旱鉴定指标。

Nine physiological indicators of thirty-six macadamia varieties were determined under the prolonged drought stress,and the comprehensive analysis on drought resistance was conducted by using the subordination function method.It was showed that＇YunMac 7＇,＇YunMac 24＇,＇YunMac 36＇,＇YunMac 32＇and＇YunMac 17＇were the most drought-resistant varieties;＇YunMac 29＇,＇YunMac 2＇and＇YunMac 19＇the least drought-resistant varieties,and the other twenty-eight varieties were of the moderate drought resistance.In addition,correlations between the drought resistance and the nine physiological indicators were analyzed by using the gray connection analysis and the principal components analytic method.The result indicated that the leaf blade relative water content,the soluble sugar content,the soluble protein content,the superoxide dismutase and the free proline content could be treated as the important indicators of drought-resistant evaluation for the these macadamia varieties.