TY - JOUR
T1 - New insights on plant salt tolerance mechanisms and their potential use for breeding
AU - Hanin, Moez
AU - Ebel, Chantal
AU - Ngom, Mariama
AU - Laplaze, Laurent
AU - Masmoudi, Khaled
N1 - Funding Information:
We are grateful to the College of Food and Agriculture, United Arab Emirates University (UAEU) for funding support of this publication to KM. MN and LL acknowledge support from the IRD and the Joint Genome Institute (Community Sequencing Programme n° CSP-580 to LL).
Publisher Copyright:
© 2016 Hanin, Ebel, Ngom, Laplaze and Masmoudi.
PY - 2016/11/29
Y1 - 2016/11/29
N2 - 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.
AB - 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.
KW - Beneficial soil microorganisms
KW - Detoxification pathways
KW - Engineering of plant salinity tolerance
KW - Salinity
KW - Tolerance mechanisms
KW - Transport of sodium
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U2 - 10.3389/fpls.2016.01787
DO - 10.3389/fpls.2016.01787
M3 - Review article
AN - SCOPUS:85003728111
SN - 1664-462X
VL - 7
JO - Frontiers in Plant Science
JF - Frontiers in Plant Science
IS - NOVEMBER2016
M1 - 1787
ER -