scholarly journals A Novel WRKY Transcription Factor, MuWRKY3 (Macrotyloma uniflorum Lam. Verdc.) Enhances Drought Stress Tolerance in Transgenic Groundnut (Arachis hypogaea L.) Plants

2018 ◽  
Vol 9 ◽  
Author(s):  
Kurnool Kiranmai ◽  
Gunupuru Lokanadha Rao ◽  
Merum Pandurangaiah ◽  
Ambekar Nareshkumar ◽  
Vennapusa Amaranatha Reddy ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Drought Stress ◽  
Stress Tolerance ◽  
Arachis Hypogaea ◽  
Wrky Transcription Factor ◽  
Drought Stress Tolerance ◽  
Macrotyloma Uniflorum ◽  
Arachis Hypogaea L

Genetic engineering for salt and drought stress tolerance in peanut (Arachis hypogaea L.)

2018 ◽  
Vol 23 (4) ◽  
pp. 647-652 ◽  
Author(s):  
P. B. Kavi Kishor ◽  
K. Venkatesh ◽  
P. Amareshwari ◽  
P. Hima Kumari ◽  
D. L. Punita ◽  
...  
Keyword(s):  
Drought Stress ◽  
Genetic Engineering ◽  
Stress Tolerance ◽  
Arachis Hypogaea ◽  
Drought Stress Tolerance ◽  
Arachis Hypogaea L ◽  
Salt And Drought Stress

scholarly journals Overexpression of StDREB2 Transcription Factor Enhances Drought Stress Tolerance in Cotton (Gossypium barbadense L.)

Genes ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 142 ◽  
Author(s):  
Mohamed El-Esawi ◽  
Aisha Alayafi
Keyword(s):  
Transcription Factor ◽  
Drought Stress ◽  
Gas Exchange ◽  
Stress Tolerance ◽  
Plant Biomass ◽  
Oilseed Crop ◽  
Wild Type ◽  
Ros Scavenging ◽  
Antioxidant Genes ◽  
Drought Stress Tolerance

Drought stress significantly restricts plant growth and crop productivity. Cotton is the most important textile fiber and oilseed crop worldwide, and its cultivation is affected by drought stress, particularly in dry regions. Improving cotton tolerance to drought stress using the advanced genetic engineering technologies is a promising strategy to maintain crop production and fiber quality and meet the increasing worldwide fiber and oil demand. Dehydration-responsive element binding (DREB) transcription factors play a main role in regulating stresses-tolerance pathways in plant. This study investigated whether potato DREB2 (StDREB2) overexpression can improve drought tolerance in cotton. StDREB2 transcription factor was isolated and overexpressed in cotton. Plant biomass, boll number, relative water content, soluble sugars content, soluble protein content, chlorophyll content, proline content, gas-exchange parameters, and antioxidants enzymes (POD, CAT, SOD, GST) activity of the StDREB2-overexpressing cotton plants were higher than those of wild type plants. By contrast, the contents of malondialdehyde, hydrogen peroxide and superoxide anion of StDREB2-overexpressing transgenic plants were significantly lower than that of the wild type plants. Moreover, the transgenic cotton lines revealed higher expression levels of antioxidant genes (SOD, CAT, POD, GST) and stress-tolerant genes (GhERF2, GhNAC3, GhRD22, GhDREB1A, GhDREB1B, GhDREB1C) compared to wild-type plants. Taken together, these findings showed that StDREB2 overexpression augments drought stress tolerance in cotton by inducing plant biomass, gas-exchange characteristics, reactive oxygen species (ROS) scavenging, antioxidant enzymes activities, osmolytes accumulation, and expression of stress-related genes. As a result, StDREB2 could be an important candidate gene for drought-tolerant cotton breeding.

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