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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
1
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pubmed:dateCreated |
2004-1-19
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pubmed:abstractText |
To better understand the role of active oxygen species (AOS) in acquired resistance to increased levels of ultraviolet (UV)-B irradiation in plants, we isolated an Arabidopsis mutant that is resistant to methyl viologen, and its sensitivity to UV-B was investigated. A complementation test revealed that the obtained mutant was allelic to the ozone-sensitive radical-induced cell death1-1 (rcd1-1). Therefore, this mutant was named rcd1-2. rcd1-2 was recessive and nearly 4-fold more resistant to methyl viologen than wild type. It exhibited a higher tolerance to short-term UV-B supplementation treatments than the wild type: UV-B-induced formation of cyclobutane pyrimidine dimers was reduced by one-half after 24 h of exposure; the decrease in quantum yield of photosystem II was also diminished by 40% after 12 h of treatment. Furthermore, rcd1-2 was tolerant to freezing. Steady-state mRNA levels of plastidic Cu/Zn superoxide dismutase and stromal ascorbate peroxidase were higher in rcd1-2 than in wild type, and the mRNA level of the latter enzyme was enhanced by UV-B exposure more effectively in rcd1-2. UV-B-absorbing compounds were more accumulated in rcd1-2 than in wild type after UV-B exposure for 24 h. These findings suggest that rcd1-2 methyl viologen resistance is due to the enhanced activities of the AOS-scavenging enzymes in chloroplasts and that the acquired tolerance to the short-term UV-B exposure results from a higher accumulation of sunscreen pigments. rcd1 appears to be a mutant that constitutively shows stress responses, leading to accumulation of more pigments and AOS-scavenging enzymes without any stresses.
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pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-10230060,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-10402422,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-10631255,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-10758502,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-10760305,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-10920210,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-11041881,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-11080161,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-11080303,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-11169197,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-11199393,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-11457961,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-11756663,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-12011338,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-12226503,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-12878018,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-15012547,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-1780359,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-2152131,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-2263641,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-2672059,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-3217442,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-8106085,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-8290627,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-8372351,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-8434026,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-8580771,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-8990208,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-9144965,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-9291097,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-9681039,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-9750104,
http://linkedlifedata.com/resource/pubmed/commentcorrection/14657410-9765550
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
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pubmed:status |
MEDLINE
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pubmed:month |
Jan
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pubmed:issn |
0032-0889
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
134
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
275-85
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pubmed:dateRevised |
2010-9-21
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pubmed:meshHeading |
pubmed-meshheading:14657410-Alleles,
pubmed-meshheading:14657410-Arabidopsis,
pubmed-meshheading:14657410-Base Sequence,
pubmed-meshheading:14657410-DNA, Plant,
pubmed-meshheading:14657410-DNA Damage,
pubmed-meshheading:14657410-Drug Resistance,
pubmed-meshheading:14657410-Free Radical Scavengers,
pubmed-meshheading:14657410-Freezing,
pubmed-meshheading:14657410-Gene Expression,
pubmed-meshheading:14657410-Genes, Plant,
pubmed-meshheading:14657410-Heat-Shock Response,
pubmed-meshheading:14657410-Hydrogen Peroxide,
pubmed-meshheading:14657410-Mutation,
pubmed-meshheading:14657410-Ozone,
pubmed-meshheading:14657410-Paraquat,
pubmed-meshheading:14657410-Photosynthesis,
pubmed-meshheading:14657410-RNA, Messenger,
pubmed-meshheading:14657410-RNA, Plant,
pubmed-meshheading:14657410-Radiation Tolerance,
pubmed-meshheading:14657410-Ultraviolet Rays
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pubmed:year |
2004
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pubmed:articleTitle |
A methyl viologen-resistant mutant of Arabidopsis, which is allelic to ozone-sensitive rcd1, is tolerant to supplemental ultraviolet-B irradiation.
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pubmed:affiliation |
Division of Biological Sciences, Graduate School of Environmental Earth Science, Hokkaido University, Sapporo, 060-0810 Japan.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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