Morphological and metabolic alterations in duckweed (Spirodela polyrhiza) on long-term low-level chronic UV-B exposure.
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.
Farooq
M
M
Photobiology Division, Industrial Toxicology Research Centre, Mahatma Gandhi Marg, Post Box No. 80, Lucknow 226001, India.
Shankar
U
U
Ray
R S
RS
Misra
R B
RB
Agrawal
N
N
Verma
K
K
Hans
R K
RK
D029064:Araceae / Q000254:growth & development / Q000378:metabolism / Q000528:radiation effects*; D010860:Pigments, Biological / Q000378:metabolism; D018515:Plant Leaves / Q000254:growth & development / Q000528:radiation effects; D010940:Plant Proteins / Q000378:metabolism; D018517:Plant Roots / Q000254:growth & development / Q000528:radiation effects; D013213:Starch / Q000378:metabolism; D014466:Ultraviolet Rays / Q000009:adverse effects*
D010860:Pigments, Biological; D010940:Plant Proteins; D013213:Starch