PHYSIO-BIOCHEMICAL CHARACTERISTICS AND CORRELATION ANALYSIS OF THE SEEDS OF SOME COTTON (GOSSYPIUM HIRSUTUM L.) GENOTYPES UNDER COLD TEMPERATURE STRESS

文献类型： 外文期刊

第一作者： Xia, J.

作者： Xia, J.;Shi, X.;Hao, X.;Li, N.;Khan, A.;Luo, H.;Kong, X.

作者机构：

关键词： seed germination characteristics; water absorption rate; correlation analysis; principle component analysis

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： 2020 年 18 卷 1 期

页码：

收录情况： SCI

摘要： Cotton seed germination and seedling development is severely restricted, when the seed is exposed to low temperature stress. It is urgently needed to explore cotton seed germination characteristics and the mechanism involved in low temperature stress tolerance. Different cotton genotypes (Upland cotton Xinluzao65 and Island cotton Xinhai35), and three temperatures levels i.e. 12-15 degrees C, 18-21 degrees C and 25-28 degrees C (CK) were studied to explore germination characteristics, antioxidant enzymes activities and osmotic adjustment substances responses. The results show that with the decline of temperature, germination characteristics, cold resistance index and that water absorption of cotton seeds significantly decreased at (P < 0.05), and XH35 shows stronger resistance to cold. The activities of antioxidant enzymes and osmotic adjustment substances of cotton seeds were substantially increased under low temperature. Superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) activities, soluble protein (SP), soluble sugar (SS) and free proline (FP) contents of XH35 were increased by 31.06%, 17.03%, 12.33%, 23.80%, 9.63%, and 5.36%, respectively than those of XLZ65. The principal component analysis revealed that SS and FP are the main drivers, hindering cotton seeds germination Therefore, Island cotton shows a higher cold resistance by increasing water absorption rate, antioxidant enzyme activities and osmotic adjustment.

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