中国农业科学2009，Vol.42Issue(12)：4383-4389,7.DOI:10.3864/j.issn.0578-1752.2009.12.033
不同外源激素对花铃期棉花主茎叶生理特性的影响
Effects of Different Exogenous Hormones on Physiological Characteristics of Main Stem Leaves at Flower and Boll Stage in Cotton
摘要
Abstract
[Objective] The effects of spraying exogenous hormones(gibberellin-3, GA_3; brassinolide, BR and 6-benzylaminopurine, 6-BA) at early (July 6) and full (July 17) flowering time on physiological characteristics of main stem functional leaves at flower and boll stage. [Method] Three exogenous hormone treatments were emploid, with two concentration levels each, i.e. GA_310 and 30 mg·L~(-1), BR 0.01 and 0.1 mg·L~(-1), and 6-BA 10 and 100 mg·L~(-1),with spraying water as the control(CK). The contents of chlorophyll, soluble protein, malondialdehyde, soluble sugar, endogenous hormone contents and the activities of superoxide dismutase (SOD) and peroxidase (POD) were measured. (Result] The results showed that the treatment of 100 mg·L~(-1) 6-BA significantly increased the contents of chlorophyll, soluble protein, soluble sugar and the activities of SOD and POD at full flowering stage. The treatments of 6-BA 100 mg·L~(-1) and GA_3 30 mg·L~(-1) significantly increased the contents of GA_3 and ZR, and the ratio of ZR (zeatin riboside) / ABA (abscisic acid ),GA_3 /ABA, and (ZR+GA_3)/ABA at the same stage. The content of MDA greatly decreased. The treatments of BR (0.01 mg·L~(-1)) and GA_3 (10 mg-L~(-1)) also had a positive effect, but the effect was weaker. The treatments of GA3 30 mg·L~(-1) and 6-BA 100 mg·L~(-1) significantly increased the content of soluble protein, the ratio of GA3/ABA, GA_3+ZR/ABA, while the content of MDA significantly decreased at full boiling stage. [Conclusion] Under this experimental condition, spraying 6-BA 100 mg·L~(-1) and GA_3 30 mg·L~(-1) had significantly effects on the physiological functions of main stem functional leaves, it could be used for delaying the senescence of cotton.关键词
棉花/花铃期/主茎叶/外源激素/生理特性Key words
cotton/flower and boll stage/stem leaves/exogenous hormones/physiology characteristics分类
农业科技引用本文复制引用
郑莎莎,孙传范,孙红春,刘连涛,赵金峰,李存东..不同外源激素对花铃期棉花主茎叶生理特性的影响[J].中国农业科学,2009,42(12):4383-4389,7.基金项目
高等学校博士学科点专项科研基金(20050086003)、国家自然科学基金(30771267)、河北省自然科学基金(C2006000436) （20050086003）
