Effects of artificial UV-B and solar radiation on four species of Antarctic rhodophytes SCOPUS KCI OTHER

Title
Effects of artificial UV-B and solar radiation on four species of Antarctic rhodophytes
Author(s)
Han T.; Park S.-J.; Lee M.; Han Y.-S.; Kang S.-H.; Chung H.; Lee S.-H.
Alternative Author(s)
강성호; 정호성; 이상훈
Publication Year
2001
Abstract
During austral summer 1998 we examined the impacts of artificial UV-B and solar radiation on chlorophyll a content and fresh weight of four species of Antarctic red algae namely, Georgiella confluens, Iridaea cordata, Pantoneura plocamioides and Porphyra endiviifolium. These subject species were taken in consideration of clear demarcations of their vertical distribution and classified as shallow water group (Iridaea and Porphyra) and deep water group (Georgiella and Pantoneura). When irradiated with artificial UV-B at the irradiance of 2.0 W m-2 the shallow water inhabitants were much more resistant than the algae from deep water the fresh weight of which was reduced by 40-50 % relative to control apart from loss of pigmentation. Direct solar radiation was lethal to the deep water group with a sign of complete bleaching whereas the shallow water group did not show any change in the physiological parameters. We were unable to discriminate difference in the algal sensitivity between UV-filtered and UV-transparent treatments since samples tested were either all unaffected or dead. Spectrophotometric measurements of methanolic extracts revealed a strong absorption peak in the UV range in the shallow water group of algae, Iridaea and Porphyra, but not in the deep water counterparts. Species difference in sensitivity to artificial UV-B and solar radiation is discussed in relation to biochemical and morphological characteristics and the role of the radiation in the algal vertical distribution is suggested from ecological perspective.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5930
Bibliographic Citation
Ocean and Polar Research, v.23, no.4, pp.389 - 394, 2001
Publisher
Korea Institute of Ocean Science and Technology
Subject
chlorophyll a; red alga; solar radiation; ultraviolet B radiation; Antarctica; algae; Confluens; Georgiella confluens; Iridaea; Iridaea cordata; Iridaea cordata; Pantoneura; Pantoneura plocamioides; Porphyra; Porphyra endiviifolium; Rhodophyta
Keywords
Georgiella; Iridaea; Pantoneura; Porphyra; Solar radiation; UV-B
Type
Article
Language
Korean
Document Type
Article
Publisher
Korea Institute of Ocean Science and Technology
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