Effect of SO2 on leaf anatomy, chlorophyll content and sulphur accumulation
1994
Niran Juntawong | Pongthep Suwanwaree (Kasetsart Univ., Bangkok (Thailand). Faculty of Science. Dept. of Botany)
Eleven plant species were exposed with 5 sulphurdioxide (SO2) dosages ranged from 0-10 ppm in a closed chamber at temperature 26-32 deg C, relative humidity 90-95 percent and light intensity 5.35-10.45 micro mol/s/m for 1 h. After exposing to SO2 18 h, the interveinal and marginal chlorosis and necrosis of leaf were found. Chlorophyll a and total chlorophyll content in leaf decreased drastically. More sensitivity response to SO2 was detected in Teak (Tectona grandis), Peep (Millingtonia hortensis) (0.5 ppm) Haang nok yuung farang (Delonix regia), Mahokkaanee (Swietenia mahogani), Foen phaeng (Selaginella involuta) (1.0 ppm) Chomphuu phanthip (Tabebuia pentaphylla), Huu kwaang (Terminalia catappa) (2.0 ppm) Praduu baan (Pterocarpus indicus), Makhaa mong (Afzelia xylocarpa), Thon (Albizzia procera) and Saap suea (Eupatorium odoratum) (10.0 ppm). Total sulphur content in leaf was found to be increased significantly. Maximum sulphur accumulation was found in the plants treated with 5 ppm SO2 and the ranking from higher to lower content was in the order of Chomphuu phanthip (Tabebuia pentaphylla), Makhaa mong (Afzelia xylocarpa), Mahokkaanee (Swietenia mahogani), Saap suea (Eupatorium odoratum), Praduu baan (Pterocarpus indicus), Huu kwaang (Teminalia catappa), Teak (Tectona grandis), Thon (Albizzia procera), Peep (Millingtonia hortensis), Haang nok yuung farang (Delonix regia) and Foen phaeng (Selaginella involuta), respectively.
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Эту запись предоставил Kasetsart University