Effects of strigolactone on photosynthetic and physiological characteristics in salt-stressed rice seedlings

• Published in: Scientific reports 2020-04, Vol.10 (1), p.6183-6183, Article 6183
• Main Authors: Ling, Fenglou, Su, Qingwang, Jiang, Hao, Cui, Jingjing, He, Xiaoliang, Wu, Zhihai, Zhang, Zhian, Liu, Juan, Zhao, Yongjun
• Format: Article
• Language: English
• Subjects: 13/106; 631/449/1741/2672; 631/449/2661; 631/449/711; 96; 96/106; 96/95; Abiotic stress; Aquatic plants; Carbon dioxide; Chlorophyll; Conductance; Crop Production - methods; Crops, Agricultural - drug effects; Crops, Agricultural - physiology; Heterocyclic Compounds, 3-Ring - pharmacology; Humanities and Social Sciences; Lactones - pharmacology; Leaves; multidisciplinary; Nutrients; Oryza - drug effects; Oryza - physiology; Photosynthesis; Photosynthesis - drug effects; Physiology; Phytohormones; Plant growth; Plant hormones; Plant Leaves - drug effects; Plant Leaves - physiology; Rice; Salt; Salt Stress - physiology; Salt Tolerance - drug effects; Salt Tolerance - physiology; Salts; Science; Science (multidisciplinary); Seedlings; Seedlings - drug effects; Seedlings - growth & development; Side effects; Sodium chloride; Stomata; Stomatal conductance; Superoxide dismutase; Transpiration
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-020-63352-6

Saline stress has been identified as the primary factor inhibiting rice seedling growth, which represents a complex abiotic stress process. Most plant hormones have been shown to alleviate the plant damage caused by salt stress. The effects of synthetic strigolactone (GR24) on Jinongda 667 rice seedlings treated with 200 mM NaCl were studied. Photosynthesis and its related physiological characteristics were analyzed in salt-stressed rice seedlings treated with GR24. NaCL stress inhibited the growth of the rice, including plant height and root length, by approximately 14% and 40%, respectively. Compared to the control check group (CK), the adverse effects of salt stress on the growth status, leaf photosynthesis, and physiological/biochemical indices in the rice seedlings were alleviated in the GR24 treatment group. With increases in the GR24 concentration, the plant height and root length of the seedlings increased. The plant height in the groups treated with 1/2 Hoagland’s complete nutrient solution + 200 mM NaCl +1 μM GR24 (T4) and 1/2 Hoagland’s complete nutrient solution + 200 mM NaCl +5 μM GR24 (T5) were significantly different than the 1/2 Hoagland’s complete nutrient solution + 200 mM NaCl group (T1) (P