| Effects of soaking seeds with salicylic acid on cotton seedling growth and photosynthetic characteristics under salt stress |
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| DOI：10.7606/j.issn.1000-7601.2017.02.18 |
| Key Words: soaking seeds with salicylic acid NaCl stress cotton seedling plant growth photosynthetic pigment chlorophyll fluorescence kinetics |
| Author Name | Affiliation | | WANG Li-hong | College of Agronomy, Xinjiang University/Research Center of Cotton Engineering, Ministry of Education, Urumqi, Xinjiang 830052, China | | LI Xing-xing | College of Agronomy, Xinjiang University/Research Center of Cotton Engineering, Ministry of Education, Urumqi, Xinjiang 830052, China | | SUN Ying-ying | College of Agronomy, Xinjiang University/Research Center of Cotton Engineering, Ministry of Education, Urumqi, Xinjiang 830052, China | | Amanguli·Maimaitiali | College of Agronomy, Xinjiang University/Research Center of Cotton Engineering, Ministry of Education, Urumqi, Xinjiang 830052, China | | Lazhati·Nuerbulati | College of Agronomy, Xinjiang University/Research Center of Cotton Engineering, Ministry of Education, Urumqi, Xinjiang 830052, China | | ZHANG Ju-song | College of Agronomy, Xinjiang University/Research Center of Cotton Engineering, Ministry of Education, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| To study the effect of soaking seeds with salicylic acid (SA) on cotton seedling's photosynthetic characteristics under salt stress, “Zhongmiansuo 41 (salt tolerance variety)” and “Zhongmiansuo 49 (less salt tolerance variety)” was used in the pot experiment. Cotton seedling’s growth, photosynthesis and chlorophyll fluorescence dynamics under NaCl stress were measured. The result was as follows: (1) For 0.80% NaCl, plant height, leaf area, dry weight, chlorophyll content and net photosynthesis rate were decreased, and leaf PSII reaction center and the acceptor were injured. Compared with no NaCl, net photosynthetic rate of Zhongmiansuo 41 was decreased by 17.19% and Zhongmiansuo49 decreased by 19.46%. (2) Seed SA soaking slowed down the salty stress injury and was helpful for plant growth, photosynthesis structure and stomata opening, and could promote the photosynthesis pigment accumulation as well. (3) SA could initiate the self-resistance against salt stress of cotton seedlings and the effect of 0.05 mmol·L-1 SA was better than 0.10 mmol·L-1, indicating that seed soaking with 0.05 mmol·L-1 SA could promote the growth and resist the damage caused by salt stress. |
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