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  • Title: Morphological and metabolic alterations in duckweed (Spirodela polyrhiza) on long-term low-level chronic UV-B exposure.
    Author: Farooq M, Shankar U, Ray RS, Misra RB, Agrawal N, Verma K, Hans RK.
    Journal: Ecotoxicol Environ Saf; 2005 Nov; 62(3):408-14. PubMed ID: 16216635.
    Abstract:
    Laboratory grown duckweed (Spirodela polyrhiza) plants were exposed to 0.72 and 1.44J of UV-B radiation daily for 7 days at 0.4mW/cm(2) intensity. Chlorosis and necrosis were observed along with depletion in protein, pigments (chlorophyll, pheophytin, carotenoids, phycoerythrin, phycocyanin, and flavoxanthin), biomass, root length, and frond size in UV-B-exposed plants. The study confirms morphological and metabolic alterations leading to reduction in the productivity of duckweed following long-term exposure to UV-B radiation.
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