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Titolo:
Effects of temperature on the photoreactivation of ultraviolet-B-induced DNA damage in Palmaria palmata (Rhodophyta)
Autore:
Pakker, H; Martins, RST; Boelen, P; Buma, AGJ; Nikaido, O; Breeman, AM;
Indirizzi:
Univ Groningen, Dept Marine Biol, NL-9750 AA Haren, Netherlands Univ Groningen Haren Netherlands NL-9750 AA L-9750 AA Haren, Netherlands Kanazawa Univ, Fac Pharmaceut Sci, Div Radiat Biol, Kanazawa, Ishikawa 920, Japan Kanazawa Univ Kanazawa Ishikawa Japan 920 , Kanazawa, Ishikawa 920, Japan
Titolo Testata:
JOURNAL OF PHYCOLOGY
fascicolo: 2, volume: 36, anno: 2000,
pagine: 334 - 341
SICI:
0022-3646(200004)36:2<334:EOTOTP>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
EFFECTIVE UV-RADIATION; DIATOM CYCLOTELLA SP; CUCUMBER COTYLEDONS; PYRIMIDINE DIMERS; ALFALFA SEEDLINGS; REPAIR; PHYTOPLANKTON; ARABIDOPSIS; IRRADIATION; ENVIRONMENT;
Keywords:
dark repair; DNA damage; Palmaria palmata; 6-4 photoproduct; photoreactivation; Rhodophyta; temperature; thymine dimer; WAR; UVBR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Breeman, AM Univ Groningen, Dept Marine Biol, POB 14, NL-9750 AA Haren, Netherlands Univ Groningen POB 14 Haren Netherlands NL-9750 AA etherlands
Citazione:
H. Pakker et al., "Effects of temperature on the photoreactivation of ultraviolet-B-induced DNA damage in Palmaria palmata (Rhodophyta)", J PHYCOLOGY, 36(2), 2000, pp. 334-341

Abstract

The accumulation of DNA damage (thymine dimers and 6-4 photoproducts) induced by ultraviolet-B radiation was studied in Palmaria palmata (L. ) O. Kuntze under different light and temperature conditions, using specific monoclonal antibodies and subsequent chemiluminescent detection. Both types of damage were repaired much faster under ultraviolet-A radiation (WAR) plus photosynthetically active radiation (PAR) than in darkness, which indicates photoreactivating activity, At 12 degrees C, all thymine dimers were repaired after 2 h irradiation with WAR plus PAR, whereas 6-4 photoproducts were almost completely repaired after 4 h, After 19 h of darkness, almost complete repair of 6-4 photoproducts was found, and 67% of the thymine dimers were repaired, In a second set of experiments, repair of DNA damage under UVAR plus PAR was compared at three different temperatures (0, 12, and 25 degrees C), Again, thymine dimers were repaired faster than 6-4 photoproducts at all three temperatures. At 0 degrees C, significant repair of thymine dimers was found but not of 6-4 photoproducts. Significant repair of both thymine dimers and 6-4 photoproducts occurred at 12 and 25 degrees C, Optimal repair efficiency was found at 25 degrees C for thymine dimers but at 12 degreesC for 6-4 photoproducts, which suggests that the two photorepair processeshave different temperature characteristics.

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Documento generato il 02/04/20 alle ore 12:38:35