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Ethylene response pathway is essential for ARABIDOPSIS A-FIFTEEN function in floral induction and leaf senescence.
- Source :
-
Plant signaling & behavior [Plant Signal Behav] 2012 Apr; Vol. 7 (4), pp. 457-60. Date of Electronic Publication: 2012 Apr 01. - Publication Year :
- 2012
-
Abstract
- ARABIDOPSIS A-FIFTEEN (AAF) encodes a plastid protein and was originally identified as a SENESCENCE-ASSOCIATED GENE. Previously, we found that overexpression of AAF (AAF-OX) in Arabidopsis led to accumulated reactive oxygen species and promoted leaf senescence induced by oxidative stress, which was suppressed by a null mutant, ein2-5, in ethylene response pathway. Whether AAF function is involved in ethylene biosynthesis and/or the response pathway remained unknown. Here we show that neither overexpression (AAF-OX) nor a null mutant (aaf-KO) of AAF generates a higher level of ethylene than the wild type and display a typical triple-response phenotype in etiolated seedlings treated with 1-aminocyclopropane-1-carboxylic acid (ACC). Nevertheless, ein2-5 suppresses the phenotypes of early flowering and age-dependent leaf senescence in AAF-OX plants. We reveal that a functional ethylene response is essential for AAF function in leaf senescence and floral induction, but AAF is unlikely a regulatory component integral to the ethylene pathway.
- Subjects :
- Arabidopsis drug effects
Arabidopsis radiation effects
Arabidopsis Proteins genetics
Ethylenes pharmacology
Flowers drug effects
Flowers radiation effects
Germination drug effects
Germination radiation effects
Hypocotyl anatomy & histology
Hypocotyl drug effects
Hypocotyl radiation effects
Light
Models, Biological
Mutation genetics
Plant Growth Regulators metabolism
Plant Growth Regulators pharmacology
Plant Leaves drug effects
Plant Leaves radiation effects
Receptors, Cell Surface genetics
Receptors, Cell Surface metabolism
Seedlings drug effects
Seedlings radiation effects
Arabidopsis growth & development
Arabidopsis metabolism
Arabidopsis Proteins metabolism
Chloroplast Proteins metabolism
Ethylenes metabolism
Flowers growth & development
Plant Leaves growth & development
Signal Transduction drug effects
Signal Transduction radiation effects
Subjects
Details
- Language :
- English
- ISSN :
- 1559-2324
- Volume :
- 7
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Plant signaling & behavior
- Publication Type :
- Academic Journal
- Accession number :
- 22499170
- Full Text :
- https://doi.org/10.4161/psb.19645