Document Detail

Plant responses to UV radiation and links to pathogen resistance.
MedLine Citation:
PMID:  17178464     Owner:  NLM     Status:  MEDLINE    
Increased incident ultraviolet (UV) radiation due to ozone depletion has heightened interest in plant responses to UV because solar UV wavelengths can reduce plant genome stability, growth, and productivity. These detrimental effects result from damage to cell components including nucleic acids, proteins, and membrane lipids. As obligate phototrophs, plants must counter the onslaught of cellular damage due to prolonged exposure to sunlight. They do so by attenuating the UV dose received through accumulation of UV-absorbing secondary metabolites, neutralizing reactive oxygen species produced by UV, monomerizing UV-induced pyrimidine dimers by photoreactivation, extracting UV photoproducts from DNA via nucleotide excision repair, and perhaps transiently tolerating the presence of DNA lesions via replicative bypass of the damage. The signaling mechanisms controlling these responses suggest that UV exposure also may be beneficial to plants by increasing cellular immunity to pathogens. Indeed, pathogen resistance can be enhanced by UV treatment, and recent experiments suggest DNA damage and its processing may have a role.
Bernard A Kunz; David M Cahill; Peter G Mohr; Megan J Osmond; Edward J Vonarx
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  International review of cytology     Volume:  255     ISSN:  0074-7696     ISO Abbreviation:  Int. Rev. Cytol.     Publication Date:  2006  
Date Detail:
Created Date:  2006-12-20     Completed Date:  2007-01-26     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  2985180R     Medline TA:  Int Rev Cytol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1-40     Citation Subset:  IM    
School of Life and Environmental Sciences, Deakin University, Geelong, Victoria 3217, Australia.
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MeSH Terms
DNA Damage
DNA Repair
DNA, Plant / metabolism,  radiation effects
Deoxyribodipyrimidine Photo-Lyase / metabolism
Free Radicals / metabolism
Fungi / pathogenicity*,  radiation effects
Gene Expression Regulation, Plant / radiation effects*
Immunity, Innate
Lipid Peroxidation
Membrane Lipids / metabolism,  radiation effects
Oxidative Stress / radiation effects*
Plant Diseases / genetics,  immunology,  microbiology,  virology
Plant Proteins / metabolism,  radiation effects
Plant Viruses / pathogenicity*,  radiation effects
Plants / genetics,  immunology,  metabolism,  radiation effects*
Radiation Tolerance
Ultraviolet Rays*
Reg. No./Substance:
0/DNA, Plant; 0/Free Radicals; 0/Membrane Lipids; 0/Plant Proteins; EC Photo-Lyase

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