The chili pepper CaATL1: an AT-hook motif-containing transcription factor implicated in defence responses against pathogens

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Title
The chili pepper CaATL1: an AT-hook motif-containing transcription factor implicated in defence responses against pathogens
Author(s)
Soo Yong Kim; Y C Kim; E S Seong; Y H Lee; Jeong Mee Park; D Choi
Bibliographic Citation
Molecular Plant Pathology, vol. 8, no. 6, pp. 761-771
Publication Year
2007
Abstract
Using cDNA microarray analysis, we isolated a cDNA clone, CaATL1 (Capsicum annuum L. Bukang AT-hook-Like gene 1), from a chili pepper plant incompatibly interacting with bacterial pathogens. The deduced amino acid sequence has a potential nuclear localization sequence and an AT-hook DNA binding motif which can bind AT-rich sequence elements. Expression of CaATL1 was specifically induced in host- and non-host-resistant responses against bacterial and viral pathogens in pepper plants. In addition, CaATL1 transcripts also increased following salicylic acid and ethephone treatment but were only mildly induced by methyl-jasmonate treatment. CaATL1::smGFP (soluble-modified green fluorescent protein) fusion protein localized to nuclei in tobacco BY2 protoplasts. The C-terminal region of the CaATL1 protein fused to the LexA DNA binding domain was able to activate reporter gene expression in yeast. To analyse further the role of the CaATL1 in pathogen defence response, we generated CaATL1-over-expressing transgenic tomato plants. These transgenic plants showed enhanced disease resistance against bacterial and oomycete pathogens. Taken together, these results provide the first evidence of a role for a plant AT-hook motif-containing transcription factor in pathogen defence response.
ISSN
1464-6722
Publisher
Wiley
DOI
http://dx.doi.org/10.1111/j.1364-3703.2007.00427.x
Type
Article
Appears in Collections:
Ochang Branch Institute > Division of Bioinfrastructure > International Biological Material Research Center > 1. Journal Articles
Division of Biomaterials Research > Plant Systems Engineering Research > 1. Journal Articles
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