摘要
【目的】研究马铃薯的耐热机制,为耐热和不耐热的马铃薯品种筛选做参考。【方法】测量高温胁迫下云南本地3个不同熟期马铃薯品种[云薯901(早熟)、云薯305(中晚熟)、合作88(晚熟)]的表型、部分生理指标和保护酶含量。【结果】高温胁迫对马铃薯幼苗的生长表型、SOD活性、POD活性和MDA含量都有影响。云薯901的生长表型优于其他品种;在37℃条件下,云薯901的SOD活性随胁迫时间的延长总体呈下降趋势,而其他品种总体均呈先升高后降低的变化趋势;在30℃条件下,云薯901的POD活性随着胁迫时间的延长总体呈下降趋势,而其他品种总体呈升高的趋势;在23和30℃条件下,云薯901的MDA含量在第5天时明显减少,而其他品种并无该现象。这些结果说明早熟品种云薯901的耐热表现优于其他熟期较晚的品种。【结论】持续的高温胁迫影响马铃薯幼苗的生长表型、抗氧化酶活性和膜质,且熟期较晚的品种受到的影响较大,熟期可能是筛选耐热性马铃薯品种的因素之一。
[Purpose]To study the heat-resistant mechanism of potato and provide reference for the selection of heat-resistant varieties.[Method]Under high temperature stress, the phenotypes, some physiological indexes and protective enzyme contents of three potato varieties [Yunshu901(early maturing), Yunshu305(middle late maturing), Hezuo88(late maturing)]were measured.[Result]The growth phenotype, SOD activity, POD activity and MDA content of potato seedlings were affected by high temperature stress. The growth phenotype of Yunshu901 was better than that of other varieties;at 37 ℃, the SOD activity of Yunshu901 showed a downward trend with the increase of stress time, while the other varieties showed an increase and then decreased;at 30 ℃, the POD activity of Yunshu901 showed a downward trend with the increase of stress time, and other varieties showed an upward trend;at 23 ℃ and 30 ℃, the MDA content of Yunshu901 decreased significantly at 5th day, while other varieties did not appear. These results showed that the heat resistance performance of Yunshu901 was better than that of other varieties with later maturity.[Conclusion]Continuous high temperature stress affected the growth phenotype, antioxidant enzyme activity and membrane quality of potato seedlings, and the later maturing varieties were greatly affected. The maturing period may be one of the factors for selecting heat-resistant potato varieties.
作者
刘长远
李光达
万丽嫱
成京晋
耿仕娴
海梅荣
LIU Changyuan;LI Guangda;WAN Liqiang;CHENG Jingjin;GENG Shixian;HAI Meirong(College of Agriculture and Biotechnology,Yunnan Agricultural University,Kunming 650201,China;National-Local Joint Engineering Research Center on Gemplasm Innovation&Utilization of Chinese Medicinal Materials in Southwest China,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4期596-600,共5页
Journal of Yunnan Agricultural University:Natural Science
关键词
高温胁迫
马铃薯
保护酶
不同熟期
耐热性
high temperature stress
potato
protective enzymes
different maturity
heat resistance
