کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
30412 44477 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The role of external polyamines on photosynthetic responses, lipid peroxidation, protein and Chlorophyll a content under the UV-A (352 nm) stress in Physcia semipinnata
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
The role of external polyamines on photosynthetic responses, lipid peroxidation, protein and Chlorophyll a content under the UV-A (352 nm) stress in Physcia semipinnata
چکیده انگلیسی

Physcia semipinnata was exposed to UV-A (352 nm) and visible light (210, 800 and 2000 mW/cm2) for 30 min, 1, 2, 24, and 48 h to seek the alterations in the PSII photosynthetic quantum yield, in response to radiation. Chlorophyll a fluorescence did not influence exposure to light, 210, 800 and 2000 mW/cm2. Significant alterations of the photosynthetic quantum yield ratio occurred in response to increase in UV-A exposure time. The photosynthetic quantum yield ratio decreased in P. semipinnata following exposure to UV-A for 24 and 48 h. The thalli of P. semipinnata treated with 1 mM polyamine were not influenced during the exposure to UV-A for 24 and 48 h. It was also found that exogenously spd added samples had higher chla content than spm and put added samples. In this study, we showed that lipid peroxidation levels between UV-A-treated samples and exogenously polyamine treated samples that were previously exposed to UV-A for 24 and 48 h were significantly decreased. This result is the first record to indicate that external polyamines might have some protective role on photosystem II and membrane against UV-A stress.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 90, Issue 1, 30 January 2008, Pages 64–68
نویسندگان
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