Over-expression of dehydrin gene, OsDhn1, improves drought and salt stress tolerance through scavenging of reactive oxygen species in rice (Oryza sativa L.)

2014 ◽  
Vol 57 (6) ◽  
pp. 383-393 ◽  
Author(s):  
Manu Kumar ◽  
Sang-Choon Lee ◽  
Ji-Youn Kim ◽  
Soo-Jin Kim ◽  
San San Aye ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Oryza Sativa ◽  
Salt Stress ◽  
Stress Tolerance ◽  
Oryza Sativa L ◽  
Oxygen Species ◽  
Salt Stress Tolerance ◽  
Over Expression ◽  
Drought And Salt Stress ◽  
Dehydrin Gene

scholarly journals Theanine Improves Salt Stress Tolerance via Modulating Redox Homeostasis in Tea Plants (Camellia sinensis L.)

2021 ◽  
Vol 12 ◽  
Author(s):  
Ziping Chen ◽  
Shijia Lin ◽  
Juan Li ◽  
Tingting Chen ◽  
Quan Gu ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Salt Stress ◽  
Stress Tolerance ◽  
Redox Homeostasis ◽  
Aminobutyric Acid ◽  
Oxygen Species ◽  
Salt Stress Tolerance ◽  
Proteinogenic Amino Acid ◽  
Tea Quality ◽  
Tea Plants

Theanine, a unique non-proteinogenic amino acid, is one of the most abundant secondary metabolites in tea. Its content largely determines green tea quality and price. However, its physiological roles in tea plants remain largely unknown. Here, we showed that salt stress significantly increased the accumulation of glutamate, glutamine, alanine, proline, and γ-aminobutyric acid, as well as theanine, in the new shoots of tea plants. We further found that salt stress induced the expression of theanine biosynthetic genes, including CsGOGATs, CsAlaDC, and CsTSI, suggested that salt stress induced theanine biosynthesis. Importantly, applying theanine to the new shoots significantly enhanced the salt stress tolerance. Similar effects were also found in a model plant Arabidopsis. Notably, exogenous theanine application increased the antioxidant activity of the shoots under salt stress, suggested by reduced the reactive oxygen species accumulation and lipid peroxidation, as well as by the increased SOD, CAT, and APX activities and expression of the corresponding genes. Finally, genetic evidence supported that catalase-mediated antioxidant scavenging pathway is required for theanine-induced salt stress tolerance. Taken together, this study suggested that salt stress induces theanine biosynthesize in tea plants to enhance the salt stress tolerance through a CAT-dependent redox homeostasis pathway.

MusaDHN-1, a novel multiple stress-inducible SK3-type dehydrin gene, contributes affirmatively to drought- and salt-stress tolerance in banana

Planta ◽  
2011 ◽  
Vol 234 (5) ◽  
pp. 915-932 ◽  
Author(s):  
Upendra K. Singh Shekhawat ◽  
Lingam Srinivas ◽  
Thumballi R. Ganapathi
Keyword(s):  
Salt Stress ◽  
Stress Tolerance ◽  
Salt Stress Tolerance ◽  
Multiple Stress ◽  
Drought And Salt Stress ◽  
Dehydrin Gene

scholarly journals β-Aminobutyric Acid Pretreatment Confers Salt Stress Tolerance in Brassica napus L. by Modulating Reactive Oxygen Species Metabolism and Methylglyoxal Detoxification

Plants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 241 ◽  
Author(s):  
Jubayer Al Mahmud ◽  
Mirza Hasanuzzaman ◽  
M. Iqbal R. Khan ◽  
Kamrun Nahar ◽  
Masayuki Fujita
Keyword(s):  
Reactive Oxygen Species ◽  
Salt Stress ◽  
Brassica Napus ◽  
Stress Tolerance ◽  
Photosynthetic Pigments ◽  
Antioxidant Defense ◽  
Aminobutyric Acid ◽  
Oxygen Species ◽  
Salt Stress Tolerance ◽  
Brassica Napus L

Salinity is a serious environmental hazard which limits world agricultural production by adversely affecting plant physiology and biochemistry. Hence, increased tolerance against salt stress is very important. In this study, we explored the function of β-aminobutyric acid (BABA) in enhancing salt stress tolerance in rapeseed (Brassica napus L.). After pretreatment with BABA, seedlings were exposed to NaCl (100 and 150 mM) for 2 days. Salt stress increased Na content and decreased K content in shoot and root. It disrupted the antioxidant defense system by producing reactive oxygen species (ROS; H2O2 and O2•−), methylglyoxal (MG) content and causing oxidative stress. It also reduced the growth and photosynthetic pigments of seedlings but increased proline (Pro) content. However, BABA pretreatment in salt-stressed seedlings increased ascorbate (AsA) and glutathione (GSH) contents; GSH/GSSG ratio; and the activities of ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), glutathione reductase (GR), glutathione peroxidase (GPX), superoxide dismutase (SOD), catalase (CAT), glyoxalase I (Gly I), and glyoxalase II (Gly II) as well as the growth and photosynthetic pigments of plants. In addition, compared to salt stress alone, BABA increased Pro content, reduced the H2O2, MDA and MG contents, and decreased Na content in root and increased K content in shoot and root of rapeseed seedlings. Our findings suggest that BABA plays a double role in rapeseed seedlings by reducing Na uptake and enhancing stress tolerance through upregulating the antioxidant defense and glyoxalase systems.

scholarly journals Receptor-like kinase OsSIK1 improves drought and salt stress tolerance in rice (Oryza sativa) plants

2010 ◽  
Vol 62 (2) ◽  
pp. 316-329 ◽  
Author(s):  
Shou-Qiang Ouyang ◽  
Yun-Feng Liu ◽  
Peng Liu ◽  
Gang Lei ◽  
Si-Jie He ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Salt Stress ◽  
Stress Tolerance ◽  
Salt Stress Tolerance ◽  
Drought And Salt Stress ◽  
Receptor Like Kinase

Salt stress tolerance of transgenic rice (Oryza sativa L.) expressing AtDREB1A gene under inducible or constitutive promoters

Biologia ◽  
2018 ◽  
Vol 73 (1) ◽  
pp. 31-41 ◽  
Author(s):  
Adil Hussain ◽  
Armghan Shahzad ◽  
Sobia Tabassum ◽  
Hina Hafeez ◽  
Jabar Zaman Khan Khattak
Keyword(s):  
Oryza Sativa ◽  
Salt Stress ◽  
Stress Tolerance ◽  
Transgenic Rice ◽  
Oryza Sativa L ◽  
Salt Stress Tolerance
Sign in / Sign up

Export Citation Format

Share Document