Document Detail

Extracellular hydrogen peroxide, produced through a respiratory burst oxidase/superoxide dismutase pathway, directs ingrowth wall formation in epidermal transfer cells of Vicia faba cotyledons.
MedLine Citation:
PMID:  22899058     Owner:  NLM     Status:  MEDLINE    
The intricate, and often polarized, ingrowth walls of transfer cells (TCs) amplify their plasma membrane surface areas to confer a transport function of supporting high rates of nutrient exchange across apo-/symplasmic interfaces. The TC ingrowth wall comprises a uniform wall layer on which wall ingrowths are deposited. Signals and signal cascades inducing trans-differentiation events leading to formation of TC ingrowth walls are poorly understood. Vicia faba cotyledons offer a robust experimental model to examine TC induction as, when placed into culture, their adaxial epidermal cells rapidly (h) and synchronously form polarized ingrowth walls accessible for experimental observations. Using this model, we recently reported findings consistent with extracellular hydrogen peroxide, produced through a respiratory burst oxidase homolog/superoxide dismutase pathway, initiating cell wall biosynthetic activity and providing directional information guiding deposition of the polarized uniform wall. Our conclusions rested on observations derived from pharmacological manipulations of hydrogen peroxide production and correlative gene expression data sets. A series of additional studies were undertaken, the results of which verify that extracellular hydrogen peroxide contributes to regulating ingrowth wall formation and is generated by a respiratory burst oxidase homolog/superoxide dismutase pathway.
Xue Xia; Hui-Ming Zhang; Felicity A Andriunas; Christina E Offler; John W Patrick
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Publication Detail:
Type:  Journal Article     Date:  2012-08-17
Journal Detail:
Title:  Plant signaling & behavior     Volume:  7     ISSN:  1559-2324     ISO Abbreviation:  Plant Signal Behav     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-11-16     Completed Date:  2013-04-25     Revised Date:  2013-07-12    
Medline Journal Info:
Nlm Unique ID:  101291431     Medline TA:  Plant Signal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1125-8     Citation Subset:  IM    
School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW Australia.
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MeSH Terms
Biological Transport
Cell Culture Techniques
Cell Membrane / physiology
Cell Transdifferentiation
Cell Wall / metabolism,  physiology*
Cotyledon / physiology
Gene Expression
Hydrogen Peroxide / metabolism*
Models, Biological
Oxidoreductases / metabolism*
Plant Cells / metabolism,  physiology*
Plant Epidermis / growth & development,  metabolism*
Respiratory Burst
Signal Transduction
Superoxide Dismutase / metabolism*
Vicia faba / growth & development,  metabolism,  physiology*
Reg. No./Substance:
7722-84-1/Hydrogen Peroxide; EC 1.-/Oxidoreductases; EC Dismutase

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

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