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Ethylene-induced flowering in Aechmea fasciata

ABSTRACT: This study aims to understand ethylene-induced flowering in Aechmea fasciata. During ethylene-induced flowering, AfFTL2 expression is induced and targets the EIN3 binding site ‘ATGTAC’ by AfEIL1-like.

ORGANISM(S): Aechmea fasciata

PROVIDER: GSE205799 | GEO | 2022/06/10

REPOSITORIES: GEO

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Ethylene-induced flowering in Aechmea fasciata

Project description:Ethylene-induced flowering in Aechmea fasciata

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ETHYLENE RESPONSE DNA-BINDING FACTORs are transcriptional repressors responsible for hormone cross-regulation during the ethylene response

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Project description:thylene is a gaseous plant growth regulator that controls a multitude of developmental and stress responses. Recently, the levels of Arabidopsis EIN3 protein, a key transcription factor mediating ethylene-regulated gene expression, have been demonstrated to increase in response to the presence of ethylene gas. Furthermore, in the absence ethylene, EIN3 is quickly degraded through a ubiquitin/proteasome pathway mediated by two F box proteins, EBF1 and EBF2 (1-3). Here, we report the identification of ETHYLENE INSENSITIVE5 as the 5'->3' exoribonuclease XRN4. Specifically, we demonstrate that EIN5 is a component of the ethylene signal transduction cascade acting downstream of CTR1 that is required for ethylene-mediated gene expression changes. Furthermore, we find that the ethylene insensitivity of ein5 mutant plants is a consequence of the over-accumulation of EBF1 and EBF2 mRNAs resulting in the under-accumulation of EIN3 even in the presence of ethylene gas. Together, our results suggest that the role of EIN5 in ethylene perception is to antagonize the negative feedback regulation on EIN3 by promoting EBF1 and EBF2 mRNA decay, which consequently allows the accumulation of EIN3 protein to trigger the ethylene response. Keywords: Arabidopsis growth regulation signal transduction

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2017-09-07 | GSE81200 | GEO

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