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- Title
Reciprocal influence of ethylene and gibberellins on response-gene expression in Arabidopsis thaliana.
- Authors
De Grauwe, Liesbeth; Vriezen, Wim; Bertrand, Sophie; Phillips, Andy; Vidal, Ana; Hedden, Peter; Van Der Straeten, Dominique
- Abstract
The complexity of hormonal responses and their functional overlap support the presence of an intensive cross-talk between hormone signalling pathways. A detailed analysis of responses induced by ethylene and gibberellin (GA) in a GA-insensitive mutant ( gai), an ethylene-resistant mutant ( etr1-3), the gai etr1-3 double-mutant, and in wild-type Arabidopsis thaliana plants, revealed multiple interactions between ethylene and GA signal transduction pathways. Ethylene insensitive mutants and wild-type plants treated with 1-methylcyclopropene (1-MCP), an ethylene perception inhibitor, displayed a stronger responsiveness of genes differentially regulated by GA. In addition, microarray-analysis showed that the GA-response in an ethylene-insensitive background is different from that in the wild-type, confirming the importance of ethylene in a plant’s response towards GA. In this paper, we present a number of genes with an altered response-pattern as a direct consequence of cross-talk between ethylene and GA.
- Subjects
HORMONES; ETHYLENE; ARABIDOPSIS thaliana; GENES; GENE expression; GIBBERELLINS; PLANT hormones; PLANT regulators; MICROBIAL genetics
- Publication
Planta: An International Journal of Plant Biology, 2007, Vol 226, Issue 2, p485
- ISSN
0032-0935
- Publication type
Article
- DOI
10.1007/s00425-007-0499-x