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Dynamics of Salt Tolerance: Molecular Perspectives

  • Devinder Sandhu
  • Amita Kaundal
Chapter

Abstract

Plant being sessile has to face many environmental stresses and develop physiological and biochemical mechanisms to withstand those stresses. Salinity is one of the major stresses that affects the plant growth and imposes direct impact on productivity and yield. The lack of good-quality irrigation water is forcing farmers to use alternative or degraded waters of irrigation throughout the world. One of the major considerations for using alternative or degraded water is often its high salinity. Salinity affects various physiological and biochemical mechanisms in plants, including germination and growth, photosynthesis, and plant water relations. Plants, when exposed to external stresses, develop mechanisms and responses to defend themselves. Salt tolerance is regulated by a complex network of different component traits. With the availability of the genome sequences of the most crop species, it became feasible to develop the links between physiological performance and underlying biological mechanisms involved in salinity stress. This article describes the effect of salinity on germination, growth, photosynthesis and plant water relations, and the mechanism plant adopts to protect itself, such as ion exclusion from roots, sequestering ions into vacuole, and high tolerance to ion toxicity. Recent advances in research and technology may play critical role in developing new salt-tolerant cultivars that are vigorous and high yielding.

Keywords

Salt tolerance Salt stress Ion homeostasis Ion content Ion transporters Na+/H+ antiporters Vacuolar compartmentalization 

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.USDA-ARS, US Salinity LabRiversideUSA

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