Document Detail


An epidermal-specific ethylene signal cascade regulates trans-differentiation of transfer cells in Vicia faba cotyledons.
MedLine Citation:
PMID:  20085619     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
*Transfer cells (TCs) trans-differentiate by developing extensive wall ingrowths that facilitate enhanced plasma membrane transport of nutrients. Signal(s) and signalling cascades responsible for initiating this trans-differentiation event are poorly understood. We tested the hypothesis that ethylene functions as a key inductive signal for wall ingrowth formation in epidermal cells of Vicia faba cotyledons. *Scanning electron microscopy of epidermal cells monitored their propensity for wall ingrowth formation. Spatial and temporal expression profiles of ethylene biosynthetic enzymes and key elements of ethylene signalling cascades (ethylene insensitive 3 (EIN3) and ethylene response factors (ERFs)) were determined. *Wall-ingrowth formation responded positively to manipulation of ethylene biosynthesis and perception. It was preceded by a cell-specific burst in ethylene biosynthesis accompanied by a co-localized post-translational up-regulation of VfEIN3-1 and differential expression of three VfERF genes. Blocking ethylene production arrested ongoing wall ingrowth development. Wound-induced ethylene in pod walls and seed coats caused an in planta activation of ethylene biosynthetic genes in adaxial epidermal cells that coincidentally formed wall ingrowths. *A cell-specific burst of ethylene biosynthesis functions as an inductive signal initiating and sustaining trans-differentiation to a TC morphology in vitro. These events are reproduced for developing V. faba seeds in planta.
Authors:
Yuchan Zhou; Felicity Andriunas; Christina E Offler; David W McCurdy; John W Patrick
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-01-15
Journal Detail:
Title:  The New phytologist     Volume:  185     ISSN:  1469-8137     ISO Abbreviation:  New Phytol.     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-04-01     Completed Date:  2010-06-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882884     Medline TA:  New Phytol     Country:  England    
Other Details:
Languages:  eng     Pagination:  931-43     Citation Subset:  IM    
Affiliation:
School of Environmental & Life Sciences, The University of Newcastle, Callaghan, NSW, Australia.
Data Bank Information
Bank Name/Acc. No.:
GENBANK/EU543653;  EU543654;  EU543655;  EU543656;  EU543657;  EU543658;  EU543659;  EU543660;  EU543661
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MeSH Terms
Descriptor/Qualifier:
Cell Transdifferentiation* / drug effects
Cell Wall / drug effects,  metabolism,  ultrastructure
Cotyledon / cytology*,  drug effects,  metabolism*
Ethylenes / biosynthesis,  metabolism*
Gene Expression Regulation, Plant / drug effects
Genes, Plant / genetics
Glycine / analogs & derivatives,  pharmacology
Indoleacetic Acids / metabolism
Molecular Sequence Data
Organ Specificity / drug effects
Plant Epidermis / cytology,  drug effects,  metabolism*,  ultrastructure
Plant Proteins / genetics,  metabolism
Signal Transduction* / drug effects
Up-Regulation / drug effects
Vicia faba / cytology*,  drug effects,  genetics,  metabolism
Chemical
Reg. No./Substance:
0/Ethylenes; 0/Indoleacetic Acids; 0/Plant Proteins; 56-40-6/Glycine; 56512-51-7/vinylglycine; 74-85-1/ethylene

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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