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Pathogenesis-related gene expression by specific calmodulin isoforms is dependent on NIM1, a key regulator of systemic acquired resistance.
- Source :
-
Molecules and cells [Mol Cells] 2004 Oct 31; Vol. 18 (2), pp. 207-13. - Publication Year :
- 2004
-
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 up-regulate 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 up-regulation of PR genes by these GmCaM isoforms is dependent on NIM1 (Non immunity 1) and unknown transcription factors.
- Subjects :
- Arabidopsis immunology
Arabidopsis Proteins physiology
Calmodulin genetics
Gene Expression Regulation, Plant drug effects
Plants, Genetically Modified
Protein Isoforms
Glycine max genetics
Transcriptional Activation
Transfection
Calmodulin pharmacology
Gene Expression Regulation, Plant immunology
Immunity, Innate genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1016-8478
- Volume :
- 18
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Molecules and cells
- Publication Type :
- Academic Journal
- Accession number :
- 15528997