New Insights on Plant Salt Tolerance Mechanisms and Their Potential Use for Breeding

By Moez Hanin, C. Ebel, Mariama Ngom, L. Laplaze, K. Masmoudi. Frontiers in Plant Science, 2016

650 citations recorded by the source corpus.

Soil salinization is a major threat to agriculture in arid and semi-arid regions, where water scarcity and inadequate drainage of irrigated lands severely reduce crop yield. Salt accumulation inhibits plant growth and reduces the ability to uptake water and nutrients, leading to osmotic or water-deficit stress. Salt is also causing injury of the young photosynthetic leaves and acceleration of their senescence, as the Na+ cation is toxic when accumulating in cell cytosol resulting in ionic imbalance and toxicity of transpiring leaves. To cope with salt stress, plants have evolved mainly two types of tolerance mechanisms based on either limiting the entry of salt by the roots, or controlling its concentration and distribution. Understanding the overall control of Na+ accumulation and functional studies of genes involved in transport processes, will provide a new opportunity to improve the salinity tolerance of plants relevant to food security in arid regions. A better understanding of these tolerance mechanisms can be used to breed crops with improved yield performance under salinity stress. Moreover, associations of cultures with nitrogen-fixing bacteria and arbuscular mycorrhizal fungi could serve as an alternative and sustainable strategy to increase crop yields in salt-affected fields.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/718e8ae64e32b691a75a20142ea4f381a4664b46

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Citations in the corpus

It is not all about sodium: revealing tissue specificity and signalling roles of potassium in plant responses to salt stress (2018, background): “This leads to a rapid loss of K+ from the cytosol which in turn disrupts the homeostasis of cytosolic Na+/K+ ratio, a hallmark of plant overall salt tolerance (Dasgan et al. 2002; Hauser and Horie 2010).”
Polyploidy, the Nucleotype, and Novelty: The Impact of Genome Doubling on the Biology of the Cell (2019, background): “Much is known about themolecular underpinnings of salt stress and tolerance in plants (Deinlein et al. 2014; Ferreira et al. 2015; Hanin et al. 2016; Santos et al. 2017).”
Adaptation of Plants to Salt Stress: Characterization of Na+ and K+ Transporters and Role of CBL Gene Family in Regulating Salt Stress Response (2019, background): “CNGCs are a class of nonselective cation channels that are permeable to monovalent and divalent cations such as Na+, K+, and Ca2+ [89,96,97].”
Effect of salt stress on photosynthesis and chlorophyll fluorescence in Medicago truncatula (2019, background): “Furthermore, several studies indicated that legume homologs of ion transporters were associated with salt stress responses and included Na+ transporters and Na+/H+ antiporters (Maathuis et al. 2014; Hanin et al. 2016).”
Stomata and Xylem Vessels Traits Improved by Melatonin Application Contribute to Enhancing Salt Tolerance and Fatty Acid Composition of Brassica napus L. Plants (2020, background): “The excess generation of ROS damages proteins and nucleic acids and causes lipid peroxidation [10,11].”
The Role of Na+ and K+ Transporters in Salt Stress Adaptation in Glycophytes (2017, background): “They observed that under low-K+ conditions, CBL1/CBL9 is activated by cytosolic Ca2+ to interact with CBL-interacting protein kinase 23 (CIPK23), which in turn phosphorylates AKT1, causing it to take up K+ (Figure 3).”