Authors: Liesbeth De Grauwe Wim H Vriezen Sophie Bertrand Andy Phillips Ana M Vidal Peter Hedden Dominique Van Der Straeten
Publish Date: 2007/03/10
Volume: 226, Issue: 2, Pages: 485-498
Abstract
The complexity of hormonal responses and their functional overlap support the presence of an intensive crosstalk between hormone signalling pathways A detailed analysis of responses induced by ethylene and gibberellin GA in a GAinsensitive mutant gai an ethyleneresistant mutant etr13 the gai etr13 doublemutant and in wildtype Arabidopsis thaliana plants revealed multiple interactions between ethylene and GA signal transduction pathways Ethylene insensitive mutants and wildtype plants treated with 1methylcyclopropene 1MCP an ethylene perception inhibitor displayed a stronger responsiveness of genes differentially regulated by GA In addition microarrayanalysis showed that the GAresponse in an ethyleneinsensitive background is different from that in the wildtype confirming the importance of ethylene in a plant’s response towards GA In this paper we present a number of genes with an altered responsepattern as a direct consequence of crosstalk between ethylene and GA
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