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The small GTPase, nucleolar GTP-binding protein 1 (NOG1), has a novel role in plant innate immunity

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Title The small GTPase, nucleolar GTP-binding protein 1 (NOG1), has a novel role in plant innate immunity
 
Creator Lee, Seonghee
Senthil-Kumar, Muthappa
Kang, Miyoung
Rojas, Clemencia M.
Tang, Yuhong
Oh, Sunhee
Choudhury, Swarup Roy
Lee, Hee-Kyung
Ishiga, Yasuhiro
Allen, Randy D.
Pandey, Sona
Mysore, Kirankumar S.
 
Subject Plant stress responses
Stomata
plant innate immunity
GTPase
NOG1
GTPbinding protein 1
 
Description Accepted date: 17 July 2017
Plant defense responses at stomata and apoplast are the most important early events during plant-bacteria interactions. The key components for the signaling of stomatal defense and nonhost resistance have not been fully characterized. Here we report the newly identified small GTPase, Nucleolar GTP-binding protein 1 (NOG1), functions for plant immunity against bacterial pathogens. Virus-induced gene silencing of NOG1 compromised nonhost resistance in N. benthamiana and tomato. Comparative genomic analysis showed that two NOG1 copies are present in all known plant species: NOG1-1 and NOG1-2. Gene downregulation and overexpression studies of NOG1-1 and NOG1-2 in Arabidopsis revealed the novel function of these genes in nonhost resistance and stomatal defense against bacterial pathogens, respectively. Specially, NOG1-2 regulates guard cell signaling in response to biotic and abiotic stimuli through jasmonic acid (JA)- and abscisic acid (ABA)-mediated pathways. The results here provide valuable information on the new functional role of small GTPase, NOG1, in guard cell signaling and early plant defense in response to bacterial pathogens.
Tis work was funded by the Noble Research Institute, LLC. Te authors thank Drs. Elison Blancafor and Jin
Nakashima for assistance with cellular imaging, Takako Ishiga for assistance with inoculations of tomato plants,
Joohyun Lee for providing technical assistance for drought assay, and Jacquelyn Kelley for editing the manuscript.
 
Date 2017-08-28T05:34:54Z
2017-08-28T05:34:54Z
2017
 
Type Article
 
Identifier Scientific Reports, 7(1): 9260
2045-2322
http://223.31.159.10:8080/jspui/handle/123456789/778
https://www.nature.com/articles/s41598-017-08932-9
10.1038/s41598-017-08932-9
 
Language en_US
 
Publisher Nature Publishing Group