Document Detail

Lysigenous aerenchyma formation in Arabidopsis is controlled by LESION SIMULATING DISEASE1.
MedLine Citation:
PMID:  18055613     Owner:  NLM     Status:  MEDLINE    
Aerenchyma tissues form gas-conducting tubes that provide roots with oxygen under hypoxic conditions. Although aerenchyma have received considerable attention in Zea mays, the signaling events and genes controlling aerenchyma induction remain elusive. Here, we show that Arabidopsis thaliana hypocotyls form lysigenous aerenchyma in response to hypoxia and that this process involves H(2)O(2) and ethylene signaling. By studying Arabidopsis mutants that are deregulated for excess light acclimation, cell death, and defense responses, we find that the formation of lysigenous aerenchyma depends on the plant defense regulators LESION SIMULATING DISEASE1 (LSD1), ENHANCED DISEASE SUSCEPIBILITY1 (EDS1), and PHYTOALEXIN DEFICIENT4 (PAD4) that operate upstream of ethylene and reactive oxygen species production. The obtained results indicate that programmed cell death of lysigenous aerenchyma in hypocotyls occurs in a similar but independent manner from the foliar programmed cell death. Thus, the induction of aerenchyma is subject to a genetic and tissue-specific program. The data lead us to conclude that the balanced activities of LSD1, EDS1, and PAD4 regulate lysigenous aerenchyma formation in response to hypoxia.
Per Mühlenbock; Malgorzata Plaszczyca; Marian Plaszczyca; Ewa Mellerowicz; Stanislaw Karpinski
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-11-30
Journal Detail:
Title:  The Plant cell     Volume:  19     ISSN:  1040-4651     ISO Abbreviation:  Plant Cell     Publication Date:  2007 Nov 
Date Detail:
Created Date:  2008-01-02     Completed Date:  2008-03-07     Revised Date:  2013-06-06    
Medline Journal Info:
Nlm Unique ID:  9208688     Medline TA:  Plant Cell     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3819-30     Citation Subset:  IM    
Institute of Plant Physiology, Polish Academy of Sciences, 30 239 Krakow, Poland.
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MeSH Terms
Arabidopsis / cytology*,  genetics
Arabidopsis Proteins / genetics,  metabolism*
Cell Hypoxia
DNA-Binding Proteins / metabolism*
Ethylenes / metabolism
Gene Expression Regulation, Plant
Hydrogen Peroxide / metabolism
Hypocotyl / cytology
Models, Biological
Mutation / genetics
Organ Specificity
Plant Roots / cytology
Plant Shoots / cytology
Plant Stomata / cytology
Transcription Factors / metabolism*
Reg. No./Substance:
0/Arabidopsis Proteins; 0/DNA-Binding Proteins; 0/Ethylenes; 0/LSD1 protein, Arabidopsis; 0/Transcription Factors; 7722-84-1/Hydrogen Peroxide; 91GW059KN7/ethylene

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