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- Title
Physiological mechanisms of growth regulators 6-BA and ABA in mitigating low temperature stress of cotton fiber development.
- Authors
WANG You-hua; LIU Jia-jie; CHEN Bing-lin; ZHOU Zhi-guo
- Abstract
A field trial with high fiber quality cotton cultivar Kemian 1 was conducted in Nanjing (lower reaches of Yangtze Rive) in 2006-2007 to study the effects of growth regulators 6-BA and ABA on the boll and fiber development and related physiological mechanisms under low temperature stress. The cotton seeds were sown on April 25 and May 25 , respectively, which could result in different temperature for the bolls on the same positions, and the growth regulators were sprayed at flowering stage. Spraying 6-BA increased the boll weight and fiber quality under both normal and low temperature conditions; whereas spraying ABA induced the decrease of fiber quality under normal temperature but decreased the reduction magnitude of fiber quality under low temperature condition. 6-BA increased significantly the boll sucrose content and sucrose synthase and sucrose phosphate synthase activities, while ABA only increased boll β-1 ,3-glucanase activity. Both 6-BA and ABA had less effects on the activity of sucrose invertase, a key enzyme for fiber development. Under low temperature condition, spraying 6-BA or ABA improved fiber quality, but the action mechanisms were different. 6-BA improved fiber quality via enhancing the activities of relevant enzymes; while ABA improved fiber quality via increasing the stress resistance of cotton plants.
- Subjects
NANJING (Jiangsu Sheng, China); CHINA; PLANT regulators; COTTON research; COTTON textiles; PLANT fibers; EFFECT of temperature on plants
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2011, Vol 22, Issue 5, p1233
- ISSN
1001-9332
- Publication type
Article