应用隶属函数法评价10个紫花苜蓿品种的耐热性

Evaluation of membership function on heattolerance of 10 alfalfa varieties

摘要:

以10个紫花苜蓿(Medicago sativa)品种作为试验材料,采用盆栽法探究38℃/35℃(昼/夜)高温胁迫对其生长和生理特性的影响,并用隶属函数法综合评价其耐热性,筛选耐热性较强及热敏感性紫花苜蓿品种。结果表明:在高温胁迫处理下,紫花苜蓿的各项生长指标和叶绿素含量均低于对照;丙二醛(MDA)含量均大于对照;可溶性糖含量升高。WL-319HQ,WL-656HQ和WL-354 3个紫花苜蓿品种耐热性较高,WL-712,三德利和维多利亚3个紫花苜蓿品种对高温较为敏感。

Abstract:

This study used 10 different varieties of alfalfa(Medicago sativa)to investigate the effects of high temperature stress on the growth and physiological characteristics at 38℃/28℃(day/night),and identify the alfalfa varieties with strong heat resistance and heat sensitivity.The results showed that all growth parameters and chlorophyll content of alfalfa under the heat stress were lower than those of the control,while MDA content and soluble sugar content under heat stress were higher compared with the control.Through the comprehensive evaluation of 10 germplasm materials,three alfalfa varieties(WL-319HQ,WL-656HQ and WL-354)with high heat tolerance and another three alfalfa varieties(Sanditi,WL-712 and Voctoria)with high temperature sensitivity were identified,which provided useful germplasm for further study.