Publication Date:
1993-09-17
Description:
Plants are continually subjected to ultraviolet-B (UV-B) irradiation (290 to 320 nanometers) as a component of sunlight, which induces a variety of types of damage to the plant DNA. Repair of the two major DNA photoproducts was analyzed in wild-type Arabidopsis thaliana and in a mutant derivative whose growth was sensitive to UV-B radiation. In wild-type seedlings, repair of cyclobutane pyrimidine dimers occurred more slowly in the dark than in the light; repair of this photoproduct was not affected in the mutant. Repair, in the dark, of pyrimidine-pyrimidinone(6-4) dimers was defective in the UV-sensitive mutant.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Britt, A B -- Chen, J J -- Wykoff, D -- Mitchell, D -- New York, N.Y. -- Science. 1993 Sep 17;261(5128):1571-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Botany, University of California at Davis 95616.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8372351" target="_blank"〉PubMed〈/a〉
Keywords:
Arabidopsis/*genetics/growth & development/radiation effects
;
*DNA Repair
;
Darkness
;
Light
;
Mutation
;
Pyrimidine Dimers/*metabolism
;
*Ultraviolet Rays
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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