Effects of Spraying Abscisic Acid on Photosynthetic Physiology of Lettuce Seedlings under Salt Stress

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Xie, Yongdong^1 ; Sun, Guochao^2 ; Wang, Liming^1 ; Tang, Yi^2

College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China^1

Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, China^2

关键词: Abscisic acid;    Chlorophyll contents;    Net photosynthetic rate;    Photosynthetic characteristics;    Photosynthetic pigments;    Salt stresss;    Stomatal conductance;    Transpiration rates;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/5/052011/pdf
DOI  :  10.1088/1755-1315/199/5/052011

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The glass lettuce was made as material, the effect of different concentrations (0, 1, 5, 10, 20 μmol•L-1) of exogenous abscisic acid on photosynthetic pigments and photosynthetic characteristics of lettuce seedlings under salt stress was studied. The results showed that when the concentration of abscisic acid was lower than 10 μmol•L-1, the chlorophyll content, carotenoid content, net photosynthetic rate, stomatal conductance, and transpiration rate in leaves of lettuce seedlings were all increased along with increasing of abscisic acid concentration. When the concentration of abscisic acid was higher than 10 μmol•L-1, all indicators decreased. But the opposite trend of intercellular carbon dioxide was presented. Therefore, spraying abscisic acid could increase the resistance of lettuce under salt stress, and the best abscisic acid concentration for lettuce against salt stress was 10 μmol•L-1.