摘要
【目的】评价不同马铃薯品种(系)的耐热性。【方法】以22份马铃薯品种(系)为研究材料,马铃薯出苗后分别对其进行26、30℃的高温胁迫,以22℃为对照;分别处理20、40 d后,测定株高、叶面积、茎粗、结薯数、相对电导率、丙二醛(MDA)和脯氨酸(Pro)含量,采用隶属函数法对马铃薯耐热性进行评价。【结果】不同马铃薯品种(系)对高温的响应各不相同,随着处理温度的升高,马铃薯总体表现为株高、叶片相对电导率、MDA含量和Pro含量增加,植株茎粗和叶面积减小,结薯数减少;30℃高温胁迫下的叶面积明显小于对照和26℃高温胁迫,且随着处理时间的延长,相对电导率也随之增大。隶属函数综合排序前5位为镇薯1号、滇薯187、青薯10号、云薯401和滇同薯1号。【结论】隶属函数综合排序前5位的品种(系)对高温的耐受性较强,可作为进一步研究马铃薯耐热性的良好试验材料,为揭示高温胁迫下马铃薯的抗性机制奠定基础。
[Purpose]To evaluate the heat resistance of different potato varieties(lines).[Method]There will be 22 potato varieties(lines)used as research materials.After emergence of photoes,they were controlled at 26℃and 30℃,respectively,at 22℃as CK.After 20 days and 40 days treatment,the plant height,leaf area,stem diameter,potato number,relative conductivity,malondialdehyde(MDA)and proline(Pro)were evaluated by the membership function method.[Result]Different potato varieties(lines)responded differently to high temperature.With the increase of temperature,the most of potatoes became high and leaf relative conductivity,MDA content and Pro content increased;the leaf area reduced;the number of potatoes reducde.The leaf area under high temperature stress at 30℃was significantly lower than that in CK and 26℃high temperature stress,and the relative conductivity increase with the treatment time.The membership function values in the top five were ZS1,D187,QS10,YS401 and DTS1.[Conclusion]These five potato varieties(lines)were tolerant to high temperature;these varieties(lines)can be used as a good experimental material to further study the heat tolerance of potato,which lays a foundation for revealing the resistance mechan-ism of potato under high temperature stress.
作者
郭新宇
张光海
李凯峰
郭华春
GUO Xinyu;ZHANG Guanghai;LI Kaifeng;GUO Huachun(Yunnan Agricultural University,Institute of Potato Crops,Kunming 650201,China)
出处
《云南农业大学学报（自然科学版）》
CSCD
北大核心
2020年第2期196-205,共10页
Journal of Yunnan Agricultural University:Natural Science
基金
国家马铃薯产业技术体系(CARS-09-P15)
云岭学者人才培养项目(A30086652)
马铃薯化肥农药减施技术集成研究与示范(2018YFD0200808)。
关键词
马铃薯
品种
耐热
隶属函数值
potato
heat resistant
comprehensive evaluation
membership function value
