Alternative oxidase 1 (Aox1) gene expression in roots of Medicago truncatula is a genotype-specific component of salt stress tolerance

2013 ◽  
Vol 170 (1) ◽  
pp. 111-114 ◽  
Author(s):  
Haythem Mhadhbi ◽  
Vasileios Fotopoulos ◽  
Photini V. Mylona ◽  
Moez Jebara ◽  
Mohamed Elarbi Aouani ◽  
...  
Keyword(s):  
Gene Expression ◽  
Salt Stress ◽  
Stress Tolerance ◽  
Medicago Truncatula ◽  
Alternative Oxidase ◽  
Salt Stress Tolerance ◽  
Specific Component

scholarly journals Role of HSP90 in Salt Stress Tolerance via Stabilization and Regulation of Calcineurin

2000 ◽  
Vol 20 (24) ◽  
pp. 9262-9270 ◽  
Author(s):  
Jun Imai ◽  
Ichiro Yahara
Keyword(s):  
Gene Expression ◽  
Saccharomyces Cerevisiae ◽  
Salt Stress ◽  
Stress Tolerance ◽  
Normal Level ◽  
Immune Complexes ◽  
Salt Stress Tolerance ◽  
Stressed Cells ◽  
Calcineurin Activity

ABSTRACT The role of HSP90 in stress tolerance was investigated inSaccharomyces cerevisiae. Cells showing 20-fold overexpression of Hsc82, an HSP90 homologue in yeast, were hypersensitive to high-NaCl or H-LiCl stresses. Hsc82-overexpressing cells appeared similar to calcineurin-defective cells in salt sensitivity and showed reduced levels of calcineurin-dependent gene expression. Co-overexpression of Cna2, the catalytic subunit of calcineurin, suppressed the hypersensitivity. Cna2 and Hsc82 coimmunoprecipitated from control cells grown under normal conditions but not from stressed cells. In contrast, coimmunoprecipitation was detected with Hsc82-overexpressing cells even after exposure to stresses. Cna2 immune complexes from stressed control cells showed a significant level of calcineurin activity, whereas those from stressed Hsc82-overexpressing cells did not. Treatment of extracts from Hsc82-overexpressing cells with Ca2+-calmodulin increased the calcineurin activity associated with Cna2 immune complexes. Geldanamycin, an inhibitor of HSP90 abolished the coimmunoprecipitation but did not activate calcineurin. When the expression level of Hsc82 decreased to below 30% of the normal level, cells also became hypersensitive to salt stress. In these cells, the amount of Cna2 was reduced, likely as a result of degradation. The present results showed that Hsc82 binds to and stabilizes Cna2 and that dissociation of Cna2 from Hsc82 is necessary for its activation.

scholarly journals A Medicago truncatula EF-Hand Family Gene, MtCaMP1, Is Involved in Drought and Salt Stress Tolerance

PLoS ONE ◽  
2013 ◽  
Vol 8 (4) ◽  
pp. e58952 ◽  
Author(s):  
Tian-Zuo Wang ◽  
Jin-Li Zhang ◽  
Qiu-Ying Tian ◽  
Min-Gui Zhao ◽  
Wen-Hao Zhang
Keyword(s):  
Salt Stress ◽  
Stress Tolerance ◽  
Medicago Truncatula ◽  
Salt Stress Tolerance ◽  
Ef Hand ◽  
Drought And Salt Stress ◽  
Family Gene

scholarly journals Overexpression of ThMYB8 mediates salt stress tolerance by directly activating stress-responsive gene expression

Authorea ◽  
2020 ◽  
Author(s):  
zhongyaun liu ◽  
tengqian zhang ◽  
xinping li ◽  
peilong wang ◽  
yuanyuan wang ◽  
...  
Keyword(s):  
Gene Expression ◽  
Salt Stress ◽  
Stress Tolerance ◽  
Salt Stress Tolerance ◽  
Responsive Gene

Silencing of SlHB2 Improves Drought, Salt Stress Tolerance, and Induces Stress-Related Gene Expression in Tomato

2017 ◽  
Vol 36 (3) ◽  
pp. 578-589 ◽  
Author(s):  
Jingtao Hu ◽  
Guoping Chen ◽  
Wencheng Yin ◽  
Baolu Cui ◽  
Xiaohui Yu ◽  
...  
Keyword(s):  
Gene Expression ◽  
Salt Stress ◽  
Stress Tolerance ◽  
Related Gene ◽  
Salt Stress Tolerance

scholarly journals Contribution of Rhizobium–Legume Symbiosis in Salt Stress Tolerance in Medicago truncatula Evaluated through Photosynthesis, Antioxidant Enzymes, and Compatible Solutes Accumulation

2021 ◽  
Vol 13 (6) ◽  
pp. 3369
Author(s):  
Annie Irshad ◽  
Rana Naveed Ur Rehman ◽  
Muhammad Mohsin Abrar ◽  
Qudsia Saeed ◽  
Rahat Sharif ◽  
...  
Keyword(s):  
Salt Stress ◽  
Survival Rate ◽  
Salt Tolerance ◽  
Stress Tolerance ◽  
Medicago Truncatula ◽  
Soluble Sugars ◽  
Compatible Solutes ◽  
N Fixation ◽  
Salt Stress Tolerance ◽  
Legume Symbiosis

The effects of salt stress on the growth, nodulation, and nitrogen (N) fixation of legumes are well known, but the relationship between symbiotic nitrogen fixation (SNF) driven by rhizobium–legume symbiosis and salt tolerance in Medicago truncatula is not well studied. The effects of the active nodulation process on salt stress tolerance of Medicago truncatula were evaluated by quantifying the compatible solutes, soluble sugars, and antioxidants enzymes, as well as growth and survival rate of plants. Eight weeks old plants, divided in three groups: (i) no nodules (NN), (ii) inactive nodules (IN), and (iii) active nodules (AN), were exposed to 150 mM of NaCl salt stress for 0, 8, 16, 24, 32, 40, and 48 h in hydroponic system. AN plants showed a higher survival rate (30.83% and 38.35%), chlorophyll contents (37.18% and 44.51%), and photosynthesis compared to IN and NN plants, respectively. Improved salt tolerance in AN plants was linked with higher activities of enzymatic and nonenzymatic antioxidants and higher K+ (20.45% and 39.21%) and lower Na+ accumulations (17.54% and 24.51%) when compared with IN and NN plants, respectively. Additionally, higher generation of reactive oxygen species (ROS) was indicative of salt stress, causing membrane damage as revealed by higher electrolyte leakage and lipid peroxidation. All such effects were significantly ameliorated in AN plants, showing higher compatible solutes (proline, free amino acids, glycine betaine, soluble sugars, and proteins) and maintaining higher relative water contents (61.34%). This study advocates positive role of Rhizobium meliloti inoculation against salt stress through upregulation of antioxidant system and a higher concentration of compatible solutes.

Overexpression of ThMYB8 mediates salt stress tolerance by directly activating stress-responsive gene expression

Plant Science ◽  
2021 ◽  
Vol 302 ◽  
pp. 110668
Author(s):  
Zhong-Yuan Liu ◽  
Xin-Ping Li ◽  
Teng-Qian Zhang ◽  
Yuan-Yuan Wang ◽  
Chao Wang ◽  
...  
Keyword(s):  
Gene Expression ◽  
Salt Stress ◽  
Stress Tolerance ◽  
Salt Stress Tolerance ◽  
Responsive Gene

Overexpression of a Medicago truncatula stress-associated protein gene (MtSAP1) leads to nitric oxide accumulation and confers osmotic and salt stress tolerance in transgenic tobacco

Planta ◽  
2012 ◽  
Vol 236 (2) ◽  
pp. 567-577 ◽  
Author(s):  
Aurélie Charrier ◽  
Elisabeth Planchet ◽  
Delphine Cerveau ◽  
Christine Gimeno-Gilles ◽  
Isabelle Verdu ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Salt Stress ◽  
Stress Tolerance ◽  
Transgenic Tobacco ◽  
Medicago Truncatula ◽  
Protein Gene ◽  
Salt Stress Tolerance ◽  
Stress Associated Protein
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