Open AccessThe Arabidopsis mutant iop1 exhibits induced over‐expression of the plant defensin gene PDF1.2 and enhanced pathogen resistance
Author(s) -
Penninckx Iris A. M. A.,
Eggermont Kristel,
Schenk Peer M.,
Van den Ackerveken Guido,
Cammue Bruno P. A.,
Thomma Bart P. H. J.
Publication year - 2003
Publication title -
molecular plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.945
H-Index - 103
eISSN - 1364-3703
pISSN - 1464-6722
DOI - 10.1046/j.1364-3703.2003.00193.x
Subject(s) - biology , mutant , arabidopsis , defensin , gene , methyl jasmonate , botany , microbiology and biotechnology , pathogen , reporter gene , plant disease resistance , gene expression , genetics
SUMMARY Jasmonate and ethylene are concomitantly involved in the induction of the Arabidopsis plant defensin gene PDF1.2 . To define genes in the signal transduction pathway leading to the induction of PDF1.2 , we screened for mutants with induced over‐expression of a β‐glucuronidase reporter, under the control of the PDF1.2 promoter. One mutant, iop1 ( i nduced o ver‐expressor of P DF1.2 ) produced small plants that showed induced over‐expression of the pathogenesis‐related genes PR‐3 , PR‐4 and PR‐1,2 ( PDF1.2 ), combined with a down‐regulated induction of PR‐1 upon pathogen inoculation. The iop1 mutant showed enhanced resistance to a number of necrotrophic pathogens.