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AtGBF3 confers tolerance to Arabidopsis thaliana against combined drought and Pseudomonas syringae stress

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Title AtGBF3 confers tolerance to Arabidopsis thaliana against combined drought and Pseudomonas syringae stress
 
Creator Dixit, Sandeep Kumar
Gupta, Aarti
Fatima, Urooj
Senthil-Kumar, Muthappa
 
Subject AtGBF3
combined stress
drought stress
Pseudomonas syringae
shared response
microarray
 
Description Accepted date: 3rd September 2019
In field conditions, plants are often exposed to a combination of abiotic and biotic stresses, for instance, drought and pathogen infection. Transcriptome studies on Arabidopsis thaliana and other plants under individual and combined drought and pathogen stresses have unveiled the activation of shared molecular defense mechanisms. These shared plant responses are characterized by commonly regulated genes under both individual as well as combined stresses. Therefore, the identification of commonly regulated genes during individual and combined stress conditions can reveal plant responses towards combined stress. Available transcriptome studies on combined-stressed plants have hinted at G-Box Binding Factor 3 (GBF3) as one of the regulatory components of the shared response. However, the mechanistic understanding of the role of AtGBF3 under combined drought and pathogen stress is not yet decoded. In the current study, we used genetic approaches to identify the role of AtGBF3 in conferring tolerance to individual and combined drought and pathogen stress. Atgbf3 mutant plants showed increased susceptibility, while AtGBF3-overexpressing plants were tolerant under individual and combined drought and Pseudomonas syringae pv. tomato infection stresses as compared to wild-type plants. We further analyzed the global transcriptome of Atgbf3 mutant plants under combined stress to identify its downstream targets. We also established a high-throughput method to apply combined polyethylene glycol and pathogen stress on Murashige and Skoog medium-grown plants to further validate the role of AtGBF3 in combined stress.
Projects at MS-K lab are supported by National Institute of Plant Genome Research core funding and DBT-Ramalingaswami re-entry fellowship grant (BT/RLF/re-entry/23/2012). S.K.D. acknowledges DBT-Senior Research Fellowship (DBT/2014/NIPGR/261), U.F. acknowledges DBT-Senior Research Fellowship (DBT/2013/NIPGR/68), and A.G. acknowledges SERB National Post-Doctoral Fellowship (N-PDF/2015/000116). We thank Dr. Ranjita Sinha, Dr. BendangLongchar Chuchang, and Miss Aarzoo Qamar for critical reading of the manuscript. We also thank Mr. Rahim Tarafdar and Mr. Sundar Solanki for extending technical help at the laboratory.
 
Date 2019-09-05T08:33:04Z
2019-09-05T08:33:04Z
2019
 
Type Article
 
Identifier Environmental and Experimental Botany, 168: 103881
0098-8472
http://223.31.159.10:8080/jspui/handle/123456789/975
https://www.sciencedirect.com/science/article/pii/S0098847219308998
https://doi.org/10.1016/j.envexpbot.2019.103881
 
Language en_US
 
Format application/pdf
 
Publisher Elsevier B.V.