Potassium and Potassium-Permeable Channels in Plant Salt Tolerance

2010 ◽  
pp. 87-110 ◽  
Author(s):  
Sergey Shabala ◽  
Igor I. Pottosin
Keyword(s):  
Salt Tolerance ◽  
Plant Salt Tolerance

A Functional Alternative Oxidase Modulates Plant Salt Tolerance in Physcomitrella patens

2019 ◽  
Vol 60 (8) ◽  
pp. 1829-1841 ◽  
Author(s):  
Guochun Wu ◽  
Sha Li ◽  
Xiaochuan Li ◽  
Yunhong Liu ◽  
Shuangshuang Zhao ◽  
...  
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Stress Responses ◽  
Alternative Oxidase ◽  
Physcomitrella Patens ◽  
Redox Homeostasis ◽  
Respiratory Pathway ◽  
Functional Link ◽  
Salt Stress Condition ◽  
Plant Salt Tolerance

Abstract Alternative oxidase (AOX) has been reported to be involved in mitochondrial function and redox homeostasis, thus playing an essential role in plant growth as well as stress responses. However, its biological functions in nonseed plants have not been well characterized. Here, we report that AOX participates in plant salt tolerance regulation in moss Physcomitrella patens (P. patens). AOX is highly conserved and localizes to mitochondria in P. patens. We observed that PpAOX rescued the impaired cyanide (CN)-resistant alternative (Alt) respiratory pathway in Arabidopsis thaliana (Arabidopsis) aox1a mutant. PpAOX transcription and Alt respiration were induced upon salt stress in P. patens. Using homologous recombination, we generated PpAOX-overexpressing lines (PpAOX OX). PpAOX OX plants exhibited higher Alt respiration and lower total reactive oxygen species accumulation under salt stress condition. Strikingly, we observed that PpAOX OX plants displayed decreased salt tolerance. Overexpression of PpAOX disturbed redox homeostasis in chloroplasts. Meanwhile, chloroplast structure was adversely affected in PpAOX OX plants in contrast to wild-type (WT) P. patens. We found that photosynthetic activity in PpAOX OX plants was also lower compared with that in WT. Together, our work revealed that AOX participates in plant salt tolerance in P. patens and there is a functional link between mitochondria and chloroplast under challenging conditions.

scholarly journals Improvement Salt Tolerance of Safflower Plants by Endophytic Bacteria

2019 ◽  
Vol 5 ◽  
pp. 38-56 ◽  
Author(s):  
Khulod A. Hemida ◽  
Amany M.M. Reyad
Keyword(s):  
Salt Tolerance ◽  
Plant Growth ◽  
Endophytic Bacteria ◽  
Bacterial Species ◽  
Limiting Factors ◽  
Symbiotic Association ◽  
Bacterial Strains ◽  
Growth Promoters ◽  
Wide Range ◽  
Plant Salt Tolerance

Salinity is one of the most dangerous environmental limiting factors of the plant productivity. A wide range of adaptation strategies is required to overcome salinity stress. However, such strategies seem to be long drawn and cost-intensive. It has been confirmed in recent years that plant growth promoting endophytes (PGPEs) that have the ability to further build a symbiotic association with their host to improve host plant salt tolerance. In our investigation try to improve plant salt tolerance using different species of endophytic bacteria. From the total eight endophytic bacterial species were isolated from root, stem, and leaf of Carthamustinctorius (safflower) plant, two isolates were capable of using 1-aminocyclopropane-1-carboxylic acid (ACC) as a sole nitrogen source, and they are of positive results for (ACC) deaminase activity and indole-3-acetic acid (IAA) production. The bacterial isolates were identified using 16S ribosomal DNA technique as Bacillus cereus and Bacillus aerius and had accession numbers MG708176 and MG711593 respectively, by submitting their sequences in GenBank database. This study showed that the bacterial strains B. cereus and B. aerius are valuable biological plant growth promoters that could enhance salt tolerance in Safflower plants under 100, 200, and 300mMNaCl levels resulting in an increase in plant growth and ascorbate-glutathione redox cycle, in comparison with the non-inoculated controls. Our findings reported that the co-inoculation of the two selected endophytic bacteria strains were successfully isolated from Safflower seedlings significantly alleviated the harmful effects of salt stress, promoted plant growth and biomass yield.

Cloning of a cystatin gene from sugar beet M14 that can enhance plant salt tolerance

Plant Science ◽  
2012 ◽  
Vol 191-192 ◽  
pp. 93-99 ◽  
Author(s):  
Yuguang Wang ◽  
Yanan Zhan ◽  
Chuan Wu ◽  
Shilong Gong ◽  
Ning Zhu ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Sugar Beet ◽  
Cystatin Gene ◽  
Plant Salt Tolerance

scholarly journals Plant salt tolerance and Na+ sensing and transport

2018 ◽  
Vol 6 (3) ◽  
pp. 215-225 ◽  
Author(s):  
Honghong Wu
Keyword(s):  
Salt Tolerance ◽  
Plant Salt Tolerance

Plant Salt Tolerance

2011 ◽  
pp. 405-459 ◽  
Author(s):  
Catherine M. Grieve ◽  
Stephen R. Grattan ◽  
Eugene V. Maas
Keyword(s):  
Salt Tolerance ◽  
Plant Salt Tolerance

scholarly journals Patellin1 negatively regulates plant salt tolerance by attenuating nitric oxide accumulation in Arabidopsis

2019 ◽  
Vol 14 (12) ◽  
pp. 1675472
Author(s):  
Xia Sun ◽  
Yufen Zhuang ◽  
Honghui Lin ◽  
Huapeng Zhou
Keyword(s):  
Nitric Oxide ◽  
Salt Tolerance ◽  
Plant Salt Tolerance

scholarly journals Overexpression of Tamarix hispida ThTrx5 Confers Salt Tolerance to Arabidopsis by Activating Stress Response Signals

2020 ◽  
Vol 21 (3) ◽  
pp. 1165
Author(s):  
Jiayu Luan ◽  
Jingxiang Dong ◽  
Xin Song ◽  
Jing Jiang ◽  
Huiyu Li
Keyword(s):  
Salt Stress ◽  
Stress Response ◽  
Salt Tolerance ◽  
Germination Rate ◽  
Nacl Stress ◽  
Tamarix Hispida ◽  
Resistant Varieties ◽  
Transcriptome Comparison ◽  
Plant Salt Tolerance ◽  
Cellular Water

Salt stress inhibits normal plant growth and development by disrupting cellular water absorption and metabolism. Therefore, understanding plant salt tolerance mechanisms should provide a theoretical basis for developing salt-resistant varieties. Here, we cloned ThTrx5 from Tamarix hispida, a salt-resistant woody shrub, and generated ThTrx5-overexpressing transgenic Arabidopsis thaliana lines. Under NaCl stress, the germination rate of overexpressing ThTrx5 lines was significantly increased relative to that of the nontransgenic line; under salt stress, superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and glutathione levels and root length and fresh weight values of transgenic ThTrx5 plants were significantly greater than corresponding values for wild-type plants. Moreover, with regard to the transcriptome, comparison of differential gene expression of transgenic versus nontransgenic lines at 0 h and 3 h of salt stress exposure revealed 500 and 194 differentially expressed genes (DEGs), respectively, that were mainly functionally linked to catalytic activity and binding process. Pull-down experiments showed that ThTrx bound 2-Cys peroxiredoxin BAS1-like protein that influences stress response-associated redox, hormone signal transduction, and transcription factor functions. Therefore, this work provides important insights into ThTrx5 mechanisms that promote salt tolerance in plants.

scholarly journals Soil Bacteria Confer Plant Salt Tolerance by Tissue-Specific Regulation of the Sodium Transporter HKT1

2008 ◽  
Vol 21 (6) ◽  
pp. 737-744 ◽  
Author(s):  
Huiming Zhang ◽  
Mi-Seong Kim ◽  
Yan Sun ◽  
Scot E. Dowd ◽  
Huazhong Shi ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Soil Bacteria ◽  
Tissue Specific ◽  
High Affinity ◽  
Bacterium Bacillus Subtilis ◽  
Microbe Interactions ◽  
Specific Regulation ◽  
Sodium Transporter ◽  
Bacterium Bacillus ◽  
Plant Salt Tolerance

Elevated sodium (Na+) decreases plant growth and, thereby, agricultural productivity. The ion transporter high-affinity K+ transporter (HKT)1 controls Na+ import in roots, yet dysfunction or overexpression of HKT1 fails to increase salt tolerance, raising questions as to HKT1's role in regulating Na+ homeostasis. Here, we report that tissue-specific regulation of HKT1 by the soil bacterium Bacillus subtilis GB03 confers salt tolerance in Arabidopsis thaliana. Under salt stress (100 mM NaCl), GB03 concurrently down- and upregulates HKT1 expression in roots and shoots, respectively, resulting in lower Na+ accumulation throughout the plant compared with controls. Consistent with HKT1 participation in GB03-induced salt tolerance, GB03 fails to rescue salt-stressed athkt1 mutants from stunted foliar growth and elevated total Na+ whereas salt-stressed Na+ export mutants sos3 show GB03-induced salt tolerance with enhanced shoot and root growth as well as reduced total Na+. These results demonstrate that tissue-specific regulation of HKT1 is critical for managing Na+ homeostasis in salt-stressed plants, as well as underscore the breadth and sophistication of plant–microbe interactions.

scholarly journals Inositol Polyphosphate Phosphatidylinositol 5-Phosphatase9 (At5PTase9) Controls Plant Salt Tolerance by Regulating Endocytosis

2013 ◽  
Vol 6 (6) ◽  
pp. 1781-1794 ◽  
Author(s):  
Yael Golani ◽  
Yuval Kaye ◽  
Omri Gilhar ◽  
Mustafa Ercetin ◽  
Glenda Gillaspy ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Inositol Polyphosphate ◽  
Plant Salt Tolerance
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