THE EFFECT OF UV-B RADIATION ON PHOTOSYNTHESIS AND RESPIRATION OF PHYTOPLANKTON, BENTHIC MACROALGAE AND SEAGRASSES

被引:167
作者
LARKUM, AWD
WOOD, WF
机构
[1] School of Biological Sciences, University of Sydney, 2006, NSW
关键词
OXYGEN EVOLUTION; UV SCREENING COMPOUNDS; VARIABLE FLUORESCENCE;
D O I
10.1007/BF00018071
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Several species of marine benthic algae, four species of phytoplankton and two species of seagrass have been subjected to ultraviolet B irradiation for varying lengths of time and the effects on respiration, photosynthesis and fluorescence rise kinetics studied. No effect on respiration was found. Photosynthesis was inhibited to a variable degree in all groups of plants after irradiation over periods of up to 1 h and variable fluorescence was also inhibited in a similar way. The most sensitive plants were phytoplankton and deep-water benthic algae. Intertidal benthic algae were the least sensitive to UV-B irradiation and this may be related to adaptation, through the accumulation of UV-B screening compounds, to high light/high UV-B levels. Inhibition of variable fluorescence (F(v)) of the fluorescence rise curve was a fast and sensitive indicator of UV-B damage. Two plants studied, a brown alga and a seagrass, showed very poor recovery of F(v) over a period of 32 h.
引用
收藏
页码:17 / 23
页数:7
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