Journal Article

Development of UV Defense Mechanisms during Growth of Spinach Seedlings

Megumi Hada, Keisuke Hino and Yuichi Takeuchi

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 42, issue 7, pages 784-787
Published in print July 2001 | ISSN: 0032-0781
Published online July 2001 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pce100
Development of UV Defense Mechanisms during Growth of Spinach
Seedlings

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Changes in UV defense mechanisms were studied during the growth periods of spinach seedlings grown under the white light, which did not contain UV-B light. DNA photolyase activity in the photorepair of cyclobutane pyrimidine dimers in spinach seedlings was high in the early growth phase (cell division phase) and declined thereafter, whereas UV-absorbing substances accumulated throughout the growth period acted as a major UV-defense mechanism in the cell expansion phase.

Keywords: Key words: Cyclobutane pyrimidine dimer — DNA photolyase (EC 4.1.99.3) — Spinach — UV-absorbing substance.; Abbreviation: CPD, cyclobutane pyrimidine dimer.

Journal Article.  2508 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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