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Defense response of a pepper cultivar cv. Sy-2 is induced at temperatures below 24°C.
MedLine Citation:
PMID:  21424609     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Temperature is one of the most important environmental factors that influence plant growth and development. Recent studies imply that plants show various responses to non-extreme ambient temperatures. Previously, we have found that a pepper cultivar cv. Sy-2 (Capsicum chinense) shows developmental defects at temperatures below 24°C. In this study, to gain new insights into the temperature sensitivity of cv. Sy-2, temperature-sensitive genes were screened using microarray techniques. At restrictive temperature of 20°C, almost one-fourth of the 411 up-regulated genes were defense related or predicted to be defense related. Further expression analyses of several defense-related genes showed that defense-related genes in cv. Sy-2 were constitutively expressed at temperatures below 24°C. Moreover, accumulation of high level of salicylic acid (SA) in cv. Sy-2 grown at 20°C suggests that the defense response is activated in the absence of pathogens. To confirm that the defense response is induced in cv. Sy-2 below 24°C, we evaluated the resistance to biotrophic bacterial pathogen Xanthomonas campestris pv. vesicatoria and necrotrophic fungal pathogen Cercospora capsici. Cv. Sy-2 showed enhanced resistance to X. campestris pv. vesicatoria, but not to C. capsici.
Authors:
Sota Koeda; Munetaka Hosokawa; Byoung-Cheorl Kang; Chihiro Tanaka; Doil Choi; Satoshi Sano; Takashi Shiina; Motoaki Doi; Susumu Yazawa
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-20
Journal Detail:
Title:  Journal of plant research     Volume:  -     ISSN:  1618-0860     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9887853     Medline TA:  J Plant Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan, koeda.sota@t02.mbox.media.kyoto-u.ac.jp.
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