Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Efficient photoreactivation of UVBR-induced DNA damage in the sublittoral macroalga Rhodymenia pseudopalmata (Rhodophyta)
Autore:
Pakker, H; Beekman, CAC; 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
Titolo Testata:
EUROPEAN JOURNAL OF PHYCOLOGY
fascicolo: 2, volume: 35, anno: 2000,
pagine: 109 - 114
SICI:
0967-0262(200005)35:2<109:EPOUDD>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIATOM CYCLOTELLA SP; HALOBACTERIUM-CUTIRUBRUM; ULTRAVIOLET-RADIATION; CUCUMBER COTYLEDONS; PYRIMIDINE DIMERS; ALFALFA SEEDLINGS; THYMINE DIMERS; PLANT LIFE; REPAIR; PHYTOPLANKTON;
Keywords:
dark repair; DNA damage; photoreactivation; Rhodophyta; Rhodymenia pseudopalmata; temperature; thymine dimer; ultraviolet-B radiation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
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., "Efficient photoreactivation of UVBR-induced DNA damage in the sublittoral macroalga Rhodymenia pseudopalmata (Rhodophyta)", EUR J PHYC, 35(2), 2000, pp. 109-114

Abstract

Repair of DNA damage induced by ultraviolet-B radiation (UVBR) was investigated in the sublittoral red alga Rhodymenia pseudopalmata at different temperatures, using immunofluorescent detection of thymine dimers. Photoreactivation of thymine dimers was completed within about 3 h at 6, 12 and 18 degrees C in the presence of ultraviolet-ii radiation (UVAR) and photosynthetically active radiation (PAR) but no repair was found in dark-incubated fragments after 16-17 h. In plants previously exposed to a low UVBR dose (biologically effective dose: BEDDNA300 = 1.6 kJ m(-2); unweighted irradiance = 0.72 W m(-2) for 4 h), photoreactivation started within the first hour underUVAR + PAR at 18 degrees C but repair only started after 1-2 h at 12 and 6degrees C. At 6 degrees C, repair was more efficient after exposure to a high UVBR dose (BEDDNA300 = 3.9 kJ m(-2); unweighted irradiance = 0.78 W m(-2) for 5 h) than to a lower dose (BEDDNA300 = 1.6 kJ m(-2)); no such difference was found at 18 degrees C. It is concluded that R, pseudopalmata is able to repair DNA damage induced by high UVBR doses efficiently.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 11:59:17