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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/11329

Title: UV-B Effect on Constituents of Azolla caroliniana
Authors: Eazaz M. Mostafa
Mohamed M. Ibrahim
Keywords: Doubling Time,
Relative Growth Rate,
UV-Absorbing Compounds
Issue Date: 2007
Publisher: Journal of Animal & Plant Sciences
Abstract: Changes in growth and ultrastructure of Azolla caroliniana in response to elevated UV-B radiation were investigated. Exposure of plants to UV-B radiation for 1, 8, 16, 24 and 48 h exhibited a significant decrease in biomass and relative growth rate. This decrease resulted in an increase in doubling time over the control. Also, Chl a and b contents were significantly decreased especially after 16 h. The reduction was accompanied by a decrease in 5-aminolaevulinic acid content (precursor of chlorophyll). On the other hand, contents of carotenoid and UV-absorbing phenolic compounds (flavonoids and anthocyanins) were increased.
URI: http://hdl.handle.net/123456789/11329
Appears in Collections:College of Teaching

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