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- Title
Pathogenesis-related Gene Expression by Specific Calmodulin Isoforms Is Dependent on NIM1, a Key Regulator of Systemic Acquired Resistance.
- Authors
Hyun Mi Ok; Won Do Heo; Jae Hyuk Yoo; Chan Young Park; Ju Huck Lee; Hyun Jin Chun; Byeong Cheol Moon; Ihn Hyeong Kim; Min Chul Kim; Man Soo Choi; Hyeong Cheol Park; Mi Sun Cheong; Sang Min Lee; Ho Soo Kim; Kon Ho Lee; Moo Je Cho; Woo Sik Chung; Chae Oh Lim
- Abstract
Plants produce numerous calmodulin isoforms that exhibit differential gene expression patterns and sense different Ca2+ signals. This diversity results in different physiological responses to particular stimuli. Gm- CaM-4 and -5 are two divergent calmodulin isoforms from the soybean (Glycine max) that have been reported to be involved in plant disease resistance. However, little is known about the pathway by which these specific isoforms transduce the defense signal and upregulate pathogenesis-related (PR) genes. Here we report that overexpression of GmCaM-4/-5 induces constitutive PR gene expression and enhances disease resistance in wild-type Arabidopsis, but not in the nim1 mutant of Arabidopsis. GmCaM-4/-5 also appear to activate trans-acting elements that bind to cis-acting elements in the Arabidopsis PR-1 promoter. Thus upregulation of PR genes by these GmCaM isoforms is dependent on NIM1 (Non immunity 1) and unknown transcription factors.
- Publication
Molecules & Cells (Springer Nature), 2004, Vol 18, Issue 2, p207
- ISSN
1016-8478
- Publication type
Article