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- Title
7.2% 萎锈灵和 40% 拌种灵包衣对棉花幼苗冷胁迫生理生化特征的功效比较.
- Authors
周小云; 雷斌; 张军高; 梁晶; 龚静云; 周广威; 张少民; 李进
- Abstract
【Objective】 To compare the effects of two fungicides with similar active structure,namely,carboxin and amicarthiazol,on improving the ability of cotton seeds to withstand low temperature and cold damage,the difference between the two fungicides in improving the ability of cotton seeds to withstand low temperature and cold damage was analyzed,their physiological mechanism exploreed was preliminarily,and a theoretical basis for developing new products that can improve the ability of cotton to withstand low temperature and cold damage was provided. 【Methods】 The main cultivars of Xinlu Zao 50 cotton species in the cotton area of northern Xinjiang were used as experimental materials,and the basic seed coating agent coated cotton seeds were used as the control,and the seed coating agent of 7.2% carboxin and 40% amicarthiazol were added to the basic seed coating agent,respectively,and the low temperature stress treatment was carried out by artificial simulation of low temperature environment(4℃/16℃),and the physiological response of each coating treatment to cotton germination,seedling growth and cold tolerance under low temperature conditions was observed. 【Results】 Compared with the control,the germination potential of the coating treatment of carboxin and amicarthiazol was increased by 9.67% and 5.33%,respectively. The germination index was increased by 12.00% and 6.00%,the vitality index was increased by 13.33% and 6.67%,the relative conductivity(REC)was increased by -12.5% and -3.75%,the soluble protein(SP) content was increased by 11.00%and 6.00%,the superoxide dismutase(SOD) activity was increased by 10.67% and 6.67%,and the chilling injury index(CI) was decreased by -10.67% and -5.33%,respectively,and the differences were significant. The correlation analysis showed that the CI of cotton seedlings was significantly correlated with REC,SP,SOD and other indicators. Principal component analysis showed that the ability of cotton seedlings to adapt to cold stress was improved by the coating treatment of carboxin,which was better than that of amicarthiazol. 【Conclusion】 Under low temperature stress,the coating treatment of both carboxin and amicarthiazol has a certain impact on cotton seed germination and seedling physiological characteristics,can promote the transformation and synthesis of nutrients in the seeds during germination,improve seed activity,so as to improve seed germination rate. By inducing the activity of enzymes in cotton seedling cells to increase,eliminate active oxygen free radicals in the seedlings,and accelerate the accumulation of MDA content,It can protect the stability of cell membrane structure of cotton seedlings,so as to improve the cold tolerance of cotton seedlings. Among the two agents,the effect of carboxin seed coating agent on inducing cold resistance of cotton seedlings is better than that of amicarthiazol,which can further strengthen product development and large-scale application.
- Publication
Xinjiang Agricultural Sciences, 2024, Vol 61, Issue 1, p176
- ISSN
1001-4330
- Publication type
Article
- DOI
10.6048/j.issn.1001-4330.2024.01.019