西南林业大学学报2017，Vol.37Issue(3)：7-13,7.DOI:10.11929/j.issn.2095-1914.2017.03.002
细叶云南松幼苗对PEG-6000模拟干旱胁迫的生理响应
Physiological Responses of Seedlings of Pinus yunnanensis var. tenuifolia to PEG-6000 Simulated Drought Stress
摘要
Abstract
To study the physiological characteristics under the PEG-6000 simulated drought stress, half-year-old Pinus yunnanensis var. tenuifolia seedlings were planted under 6 different soil moisture levels ( CK, 0. 5%, 1. 0%, 1. 5%, 2. 0%, 2. 5%, 3. 0%) . The results showed that with the increasing of concentration of PEG-6000 aqueous solution, the survival rates of P. yunnanensis var. tenuifolia seedlings decreased gradually. Activity of APX increased first and then decrease, SOD significantly increased first and then has no obvious change, and they reached the maximum at 2. 0% PEG-6000. Activity of PPO was 4. 5 times that of CK at 3. 0% PEG-6000. When the concentration of PEG-6000 was equal or greater than 1. 0%, activity of POD increased positively. MDA, soluble sugar and soluble protein tend to increase, chlorophyll content of leaves of P. yunnanensis var. tenuifolia seedling decreased positively. The findings indicated that P. yunnanensis var. tenuifolia seedlings have the drought resistance to protect itself from drought stress by osmotic adjustment and antioxidant enzyme system.关键词
细叶云南松/聚乙二醇/干旱胁迫/生理响应Key words
Pinus yunnanensis var. tenuifolia/PEG-6000/drought stress/physiological characteristics分类
农业科技引用本文复制引用
韦秋梅,黄毅翠,赵毅辉,韩俊学,杨梅..细叶云南松幼苗对PEG-6000模拟干旱胁迫的生理响应[J].西南林业大学学报,2017,37(3):7-13,7.基金项目
广西林业厅科技项目 (桂林科字 [2016] 第20号) 资助 （桂林科字 [2016] 第20号）
广西自然科学基金 (2015GXNSFAA136081) 项目资助. （2015GXNSFAA136081）
