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- Title
调节剂对低温胁迫后恢复过程中棉花幼苗生长与生理特性的影响.
- Authors
周小云; 阿达来提·阿布都热依木; 王立红; 李进; 张军高; 刘梦丽; 雷斌; 薄瑞
- Abstract
【Objective】 After chilling stress, cotton seedlings were sprayed with plant growth regulators to explore the repair effects of different plant growth regulators on chilling stress of cotton seedlings, so as to provide technical reference for cotton seedlings to resist chilling. 【Methods】 The cotton variety 'Xinluzao 57' was treated at 4℃ for 24 hours at the cotyledon stage by artificial simulated chilling environment. The leaves were sprayed with clear water as the control, and 7 different plant regulator solutions were sprayed respectively. The effects of growth regulators on the growth and physiological and biochemical characteristics of cotton seedlings during restoration after chilling Stress were analyzed. 【Results】 The results showed that compared with the control, after spraying growth regulator, the plant height of cotton seedlings increased by 5.10% - 9.87%, stem diameter increased by 5.28% - 8.71%, root length increased by 5.24% - 9.33%, fresh weight increased by 2.26% - 5.98%, dry weight increased by 2.38% - 8.61%, chilling injury index decreased by 1.79% - 5.29%, the content of proline increased by 5.04% - 5.58%, the content of soluble protein increased by 5.07% - 5.67%, the content of soluble sugar increased by 5.05% - 5.87%, SOD activity increased by 3.79%-5.56%, POD enzyme activity increased by 2.18%-5.56%, CAT enzyme activity increased by 2.21% - 7.95%.【Conclusion】 After chilling stress, spraying growth regulators on the leaves during the recovery of normal temperature can effectively improve the osmotic adjustment ability and antioxidant ability of cotton seedling leaves, promote plant growth and repair the damage to the plant caused by chilling stress. This is a convenient and practical agronomic measure to improve the resistance of cotton to chilling. For the cotton area in Xinjiang where chilling damage occurs frequently in early spring, the technology of using plant growth regulator to improve the chilling resistance of cotton seedlings has a certain application prospect. Among them, the comprehensive effects of regulators on the restoration of cotton seedlings after chilling stress are as follows: "ATAILIN" > α- Sodium naphthylacetate >Diethyl aminoethyl hexanoate> "BIHU" > Compound Sodium Nitrophenolate > Humic acid >Potassium fulvic acid type II >Control.
- Publication
Xinjiang Agricultural Sciences, 2022, Vol 59, Issue 5, p1060
- ISSN
1001-4330
- Publication type
Article
- DOI
10.6048/j.issn.1001-4330.2022.05.003