SbNAC2 enhances abiotic stress tolerance by upregulating ROS scavenging activities and inducing stress-response genes in sorghum

2021 ◽  
pp. 104664
Author(s):  
Xueying Jin ◽  
Yufei Long ◽  
Shiqi Xiong ◽  
Zhen Yang ◽  
Wei Chen ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Stress Response ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance ◽  
Ros Scavenging ◽  
Stress Response Genes

Enhancement of abiotic stress tolerance in poplar by overexpression of key Arabidopsis stress response genes, AtSRK2C and AtGolS2

2017 ◽  
Vol 37 (5) ◽  
Author(s):  
Xiang Yu ◽  
Misato Ohtani ◽  
Miyako Kusano ◽  
Nobuyuki Nishikubo ◽  
Misa Uenoyama ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Stress Response ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance ◽  
Stress Response Genes

scholarly journals Down-Regulation of SlGRAS10 in Tomato Confers Abiotic Stress Tolerance

Genes ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 623
Author(s):  
Sidra Habib ◽  
Yee Yee Lwin ◽  
Ning Li
Keyword(s):  
Salt Stress ◽  
Abiotic Stress ◽  
Plant Growth ◽  
Stress Tolerance ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Functional Characterization ◽  
Flavonoid Biosynthesis ◽  
Ros Scavenging ◽  
Down Regulation

Adverse environmental factors like salt stress, drought, and extreme temperatures, cause damage to plant growth, development, and crop yield. GRAS transcription factors (TFs) have numerous functions in biological processes. Some studies have reported that the GRAS protein family plays significant functions in plant growth and development under abiotic stresses. In this study, we demonstrated the functional characterization of a tomato SlGRAS10 gene under abiotic stresses such as salt stress and drought. Down-regulation of SlGRAS10 by RNA interference (RNAi) produced dwarf plants with smaller leaves, internode lengths, and enhanced flavonoid accumulation. We studied the effects of abiotic stresses on RNAi and wild-type (WT) plants. Moreover, SlGRAS10-RNAi plants were more tolerant to abiotic stresses (salt, drought, and Abscisic acid) than the WT plants. Down-regulation of SlGRAS10 significantly enhanced the expressions of catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD) to reduce the effects of reactive oxygen species (ROS) such as O2− and H2O2. Malondialdehyde (MDA) and proline contents were remarkably high in SlGRAS10-RNAi plants. Furthermore, the expression levels of chlorophyll biosynthesis, flavonoid biosynthesis, and stress-related genes were also enhanced under abiotic stress conditions. Collectively, our conclusions emphasized the significant function of SlGRAS10 as a stress tolerate transcription factor in a certain variety of abiotic stress tolerance by enhancing osmotic potential, flavonoid biosynthesis, and ROS scavenging system in the tomato plant.

scholarly journals Clustered metallothionein genes are co-regulated in rice and ectopic expression of OsMT1e-P confers multiple abiotic stress tolerance in tobacco via ROS scavenging

2012 ◽  
Vol 12 (1) ◽  
pp. 107 ◽  
Author(s):  
Gautam Kumar ◽  
Hemant Kushwaha ◽  
Vaishali Panjabi-Sabharwal ◽  
Sumita Kumari ◽  
Rohit Joshi ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance ◽  
Ectopic Expression ◽  
Ros Scavenging

scholarly journals The SbMT-2 Gene from a Halophyte Confers Abiotic Stress Tolerance and Modulates ROS Scavenging in Transgenic Tobacco

PLoS ONE ◽  
2014 ◽  
Vol 9 (10) ◽  
pp. e111379 ◽  
Author(s):  
Amit Kumar Chaturvedi ◽  
Manish Kumar Patel ◽  
Avinash Mishra ◽  
Vivekanand Tiwari ◽  
Bhavanath Jha
Keyword(s):  
Abiotic Stress ◽  
Stress Tolerance ◽  
Transgenic Tobacco ◽  
Abiotic Stress Tolerance ◽  
Ros Scavenging

scholarly journals AnDHN, a Dehydrin Protein From Ammopiptanthus nanus, Mitigates the Negative Effects of Drought Stress in Plants

2021 ◽  
Vol 12 ◽  
Author(s):  
Yibo Sun ◽  
Linghao Liu ◽  
Shaokun Sun ◽  
Wangzhen Han ◽  
Muhammad Irfan ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance ◽  
Germination Rate ◽  
Root System Architecture ◽  
Ros Scavenging ◽  
Negative Effects ◽  
Ammopiptanthus Nanus ◽  
Transgenic Lines ◽  
Effects Of Drought

Dehydrins (DHNs) play crucial roles in a broad spectrum of abiotic stresses in model plants. However, the evolutionary role of DHNs has not been explored, and the function of DHN proteins is largely unknown in Ammopiptanthus nanus (A. nanus), an ancient and endangered legume species from the deserts of northwestern China. In this study, we isolated a drought-response gene (c195333_g1_i1) from a drought-induced RNA-seq library of A. nanus. Evolutionary bioinformatics showed that c195333_g1_i1 is an ortholog of Arabidopsis DHN, and we renamed it AnDHN. Moreover, DHN proteins may define a class of proteins that are evolutionarily conserved in all angiosperms that have experienced a contraction during the evolution of legumes. Arabidopsis plants overexpressing AnDHN exhibited morpho-physiological changes, such as an increased germination rate, higher relative water content (RWC), higher proline (PRO) content, increased peroxidase (POD) and catalase (CAT) activities, lower contents of malondialdehyde (MDA), H2O2 and O2–, and longer root length. Our results showed that the transgenic lines had improved drought resistance with deep root system architecture, excellent water retention, increased osmotic adjustment, and enhanced reactive oxygen species (ROS) scavenging. Furthermore, the transgenic lines also had enhanced salt and cold tolerance. Our findings demonstrate that AnDHN may be a good candidate gene for improving abiotic stress tolerance in crops.Key Message: Using transcriptome analysis in Ammopiptanthus nanus, we isolated a drought-responsive gene, AnDHN, that plays a key role in enhancing abiotic stress tolerance in plants, with strong functional diversification in legumes.

scholarly journals ROS Regulation Mechanism for Mitigation of Abiotic Stress in Plants

2021 ◽  
Author(s):  
Asha Kumari ◽  
Mahendar Singh Bhinda ◽  
Sachin Sharma ◽  
Manoj Kumar Chitara ◽  
Ashim Debnath ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Stress Tolerance ◽  
Hydroxyl Radicals ◽  
Stress Responses ◽  
Abiotic Stress Tolerance ◽  
Regulation Mechanism ◽  
Abiotic And Biotic Stress ◽  
Ros Scavenging ◽  
Antioxidant Defense Systems ◽  
Careful Manipulation

Plants respond to various stresses during their lifecycle among which abiotic stress is the most severe one comprising heat, cold, drought, salinity, flooding, etc. which take a heavy toll on crop yield worldwide in every corresponding year. ROS has a dual role in abiotic stress mechanisms where, at high levels, they are toxic to cells while at the same time, the same molecule can function as a signal transducer that activates a local as well as a systemic plant defense response against stress. The most common ROS species are Hydrogen peroxide (H2O2), Superoxide anions (O2-), Hydroxyl radicals (OH-), and Singlet oxygen (1O2) which are results of physiological metabolism often controlled by enzymatic and non-enzymatic antioxidant defense systems. ROS generally accumulate in plants during abiotic and biotic stress conditions resulting in oxidative damage which ultimately leads to programmed cell death. Many ROS scavenging pathways have been well studied against stress responses. Through careful manipulation of ROS levels in plants, we can enhance stress tolerance in plants under unfavorable environmental conditions. This chapter presents an overview of ROS regulation in plants and the essential enzymes involved in the abiotic stress tolerance mechanisms which are thoroughly discussed below.

Calcium-Dependent Protein Kinases (CDPK) in Abiotic Stress Tolerance

2018 ◽  
Vol 34 (2) ◽  
pp. 259-265 ◽  
Author(s):  
Hemant B Kardile ◽  
◽  
Vikrant ◽  
Nirmal Kant Sharma ◽  
Ankita Sharma ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Stress Tolerance ◽  
Protein Kinases ◽  
Abiotic Stress Tolerance ◽  
Calcium Dependent ◽  
Dependent Protein ◽  
Calcium Dependent Protein Kinases

Roles of Nitric Oxide in Conferring Multiple Abiotic Stress Tolerance in Plants and Crosstalk with Other Plant Growth Regulators

2021 ◽  
Author(s):  
Rajesh Kumar Singhal ◽  
Hanuman Singh Jatav ◽  
Tariq Aftab ◽  
Saurabh Pandey ◽  
Udit Nandan Mishra ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Abiotic Stress ◽  
Plant Growth ◽  
Stress Tolerance ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Abiotic Stress Tolerance
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