Acta Agriculturae Boreali-Sinica ›› 2024, Vol. 39 ›› Issue (5): 80-92. doi: 10.7668/hbnxb.20195207

Special Issue: Saline-alkali stress Hot Article Cultivation & Physiology

• Tillage & Cultivation·Physiology & Biochemistry • Previous Articles     Next Articles

Advances and Prospect on Mechanism of Salt Tolerance in Plants

WANG Dajiang1,4, LIU Zhao1,2, LU Xiang1,2, GAO Yuan1,4, SUN Simiao1, GUO Hanxin1, TIAN Wen1,2, WANG Lin1, LI Zichen1, LI Lianwen1, WANG Kun1,4, LIU Jihong2,3   

  1. 1 Research Institute of Pomology,Chinese Academy of Agricultural Sciences,Key Laboratory of Horticultural Crops Germplasm Resources Utilization,Ministry of Agriculture and Rural Affairs of the People's Republic of China,Xingcheng 125100,China
    2 Agricultural College,Shihezi University,Xinjiang Production and Construction Corps Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization,Shihezi 832000,China
    3 College of Horticulture and Forestry Sciences,Huazhong Agricultural University,National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops,Wuhan 430070,China
    4 National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land,Dongying 257000,China
  • Received:2024-05-26 Published:2024-10-28

Abstract:

Plant growth and production are faced with various biological and abiotic stresses,among which salt stress seriously affects the normal growth and development,quality and yield formation of plants.Plants have evolved morphological structure,physiological and biochemical reactions and genetic basis to adapt to salt stress during the long process of evolution.In terms of morphological structure,the leaves of salt-tolerant plants have waxy layer and lower stomatal density than those of salt-sensitive plants,and salt glands,microhairs,salt vesicles,and casparian strip have salt secretion or blocking functions.In terms of physiological activity regulation,on the one hand,salt-tolerant plants have high enzymatic and non-enzymatic antioxidant substances,such as SOD,CAT,phenolic substances,on the other hand,salt-tolerant plants have a high content of osmoregulatory substances,or can synthesize osmoregulatory substances under salt stress,including soluble proteins and sugars of organic substances and inorganic ions.In terms of molecular mechanism,SOS pathway is the most clearly studied ion regulation pathway,which maintains intracellular Na+/K+ balance through the synergistic action of SOS1,SOS2 and SOS3.In addition,plant hormones and carbon metabolism pathways also play an important role in the process of plant salt tolerance.This paper summarizes the research progress of salt-tolerant plants,and discusses the potential research focus and direction of salt-tolerant plants in terms of morphological structure,physiological basis,genetic molecular basis and transgenic methods in response to salt stress,which will help researchers quickly find the breakthrough point,gradually improve the mechanism system of salt-tolerant plants,and accelerate the efficient utilization of salt-tolerant plants.

Key words: Plant, Salt tolerance, Antioxidant, Osmotic regulation, Ion toxicity

Cite this article

WANG Dajiang, LIU Zhao, LU Xiang, GAO Yuan, SUN Simiao, GUO Hanxin, TIAN Wen, WANG Lin, LI Zichen, LI Lianwen, WANG Kun, LIU Jihong. Advances and Prospect on Mechanism of Salt Tolerance in Plants[J]. Acta Agriculturae Boreali-Sinica, 2024, 39(5): 80-92. doi: 10.7668/hbnxb.20195207.

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