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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

Paper ID Volume ID Publish Year Pages File Format Full-Text
30412 44477 2008 5 PDF Available
Title
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
Abstract

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.

Keywords
Polyamine; UV-A stress; Photosystem II; Lipid peroxidation
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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
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 90, Issue 1, 30 January 2008, Pages 64–68
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us