کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4551494 | 1328304 | 2009 | 9 صفحه PDF | دانلود رایگان |
Ultraviolet-B (UV-B) radiation (0.5, 1.0, 1.5, and 3.0 W m−2) induced higher H2O2 production and lipid peroxidation in alga Gelidium amansii inhabiting in lower subtidal regions than upper subtidal alga Ptercladiella capillacea. Compared to G. amansii, mycosporine-like amino acid (MAA) concentration in P. capillacea was higher and can be increased by 0.5–1.0 W m−2 UV-B, while carotenoid concentration was lower but also increased by 1.5–3.0 W m−2 UV-B. UV-B increased ascorbate concentration, but to a higher degree in P. capillacea. UV-B decreased glutathione concentration, but to a higher degree in G. amansii. UV-B increased ascorbate peroxidase (APX) and glutathione reductase (GR) activities in P.capillacea but decreased them in G. amansii. UV-B increased superoxide dismutase and catalase activities, but to a higher degree in G. amansii. So, G. amansii suffered greater oxidative stress from UV-B radiation. P. capillacea can effectively reduce UV-B sensitivity by increasing sunscreen ability and antioxidant defense capacity.
Journal: Marine Environmental Research - Volume 67, Issue 1, February 2009, Pages 8–16