EVALUATION OF HIGH TEMPERATURE TOLERANCE AND PHYSIOLOGICAL RESPONSES OF DIFFERENT ANOECTOCHILUS GERMPLASM RESOURCES

文献类型： 外文期刊

第一作者： Mei, Y.

作者： Mei, Y.;Xiao, S.;Chen, D.;Mei, Y.;Qiu, D.;Mei, Y.;Qiu, D.;Chen, D.

作者机构：

关键词： Anoectochilus; high temperature stress; heat injury index; physiological indexes; enzymatic activity

期刊名称：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH （ 影响因子：0.711； 五年影响因子：0.796 ）

ISSN： 1589-1623

年卷期： 2018 年 16 卷 5 期

页码：

收录情况： SCI

摘要： Anoectochilus genus is a precious Chinese medicinal plant. High temperature is among the critical factors that threatens plant growth in the Anoectochilus genus. The experiment was conducted at Key Laboratory of Crops Genetics and Improvement of Guangdong Province, Guangzhou, China Two lab experiments were conducted to evaluate the high temperature tolerance of different Anoectochilus germplasm resource and the physiological responses of high-temperature-resistant and sensitive Anoectochilus to high temperature. Heat injury index, recovery index, soluble protein contents, proline content, malondialdehyde (MDA) content, relative electrical conductivity (REC), superoxide dismutase (SOD) activity, and catalase (CAT) activity were investigated. The results showed that, the recovery index was strongly negatively correlated with the heat injury index. The mean heat injury index at 6 h, 12 h, 24 h, 30 h and 36 h under high temperature were 5.17%, 16.90%, 39.96%, 53.70% and 70.61%, respectively. Five high-temperature-resistant species of Anoectochilus were selected. Compared with high-temperature-sensitive species of Anoectochilus germplasm, the high-temperature-resistant Anoectochilus germplasm had higher SOD activity, proline content and lower REC, CAT activity, MDA, and soluble protein content. REC, SOD activity and soluble protein content were strongly related to heat injury index. In conclusion, REC, SOD activity and soluble protein content are important attributes that could help to screen out the high temperature tolerant varieties of Anoectochilus.

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