Journal
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Volume 40, Issue 6-8, Pages 685-690Publisher
GAUTHIER-VILLARS/EDITIONS ELSEVIER
DOI: 10.1016/S0981-9428(02)01406-7
Keywords
Arabidopsis thaliana; duplication; fungal elicitor; GUS expression; multigenic family; redox; thioredoxin h
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In the model plant Arabidopsis thaliana, cytosolic thioredoxins h (TRXh) are encoded by a multigenic family of eight genes. Genomic studies have revealed that a number of these genes are duplicated genes originating from a common ancestor. This multiplicity of thioredoxin h genes raises questions of the specificity of plant thioredoxins and the function of such a large multigenic family in plant. The results from studies using northern blots, semi-quantitative RT-PCR and transgenic promoter-GUS fusions provide strong evidence that the members of the AtTRXh gene family show expression levels that vary among different plant organs. Moreover, distinct AtTRXh genes are induced in response to pathogenic elicitors. Together, our data suggest that the members of the multigenic family of AtTRXh may not have redundant functions. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
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