期刊
JOURNAL OF APPLIED PHYCOLOGY
卷 23, 期 2, 页码 283-292出版社
SPRINGER
DOI: 10.1007/s10811-010-9621-8
关键词
Chlorophyll fluorescence; Cyanobacteria; Lipids; MDA formation; Mycosporine-like amino acids; Pigments; Phycobilisomes; Scytonemin; Superoxide dismutase; UV-B
We report the effect of UV-B radiation (0.8 +/- 0.1 mW cm(-2)) and UV-B radiation supplemented with low-intensity PAR (similar to 80 mu mol photons m(-2) s(-1)) on the photosynthesis, photosynthetic pigments, phosphoglycolipids, oxidative damage, enzymatic antioxidants, and UV-absorbing compounds in Phormidium tenue, a marine cyanobacterium. UV-B radiation resulted in a decline in photosynthesis and photosynthetic pigments leading to lower biomass. P. tenue synthesized UV-absorbing compounds like mycosporine-like amino acids (MAAs) and scytonemin in response to UV-B radiation. Quantity of MAAs and scytonemin was higher when UV-B was supplemented with low-level PAR. UV-B treatment also resulted in quantitative changes in phosphoglycolipids of the membrane. The UV-B treatment resulted in a slight increase in the level of peroxidation of cell membrane and very little increase in the activity of superoxide dismutase (SOD). Results indicate that UV-B affected photosynthesis and that the main protective system was the synthesis of MAAs and scytonemin-like compounds rather than antioxidant enzymes such as SOD.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据