Botany
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Item Effects of Fusarium moniliforme culture extracts and fumonisin B1 on DNA, RNA and protein synthesis by baby hamster kidney cells(Springer Netherlands., 1998) Abeywickrama, K.; Bean, G.A.; Kennedy, K..A.Baby hamster kidney cells (BHK-21) were exposed to culture filtrates of 4 Fusarium moniliforme isolates containing varying levels of fumonisin B1 (FMB1) and the effects upon RNA, DNA and protein synthesis were monitored. Cells were also grown on medium amended with FMB1 only for comparison. After 24 h incubation FMB1 (100 μg/100 ml medium) reduced protein synthesis by 4% and by 18% after 48 h. Culture filtrates containing the highest levels of FMB1 also caused the greatest inhibition in protein synthesis after 24 h but after 48 h protein synthesis levels were the same as controls even though the FMB1 level was 360 μg/100 ml. Only FMB1 reduced DNA synthesis, by 8% after 24 h but after 48 h DNA levels had increased by 40 % over controls. The culture filtrates containing the highest levels of FMB1 (360 μg/100 ml) reduced DNA synthesis more than 50% after 24 h and 48 h. Culture filtrates containing lesser amounts of FMB1 in some instances stimulated DNA synthesis and inhibited it in others. There was also no correlation in the level of FMB1 with the inhibition of RNA synthesis by BHK cells. It appears that metabolites other than fumonisin produced by F. moniliforme in culture can affect and both stimulate and inhibit RNA, DNA and protein synthesis by BHK cells.Item Isolation and identification of fungi from mushroom composts and evaluation their biological activity(1999) Wickremasinghe, R.; Abeywickrama, K.P.; Abeythunga, D.T.U.Item Studies on the composition and biodegradation of cane molasses distillery slop of the Sevanagala sugar factory(Sri Lanka Association for the Advancement of Science, 1991) Chandrasena, G.; Widanapathirana, G.S.Item Effect of Sodium chloride (NaCl) salinity on some physiological traits of rice (Oryza sativa L.)(Sri Lanka Association for the Advancement of Science, 1991) Ranasinghe, A.; Peiris, B.Item Floristic composition of the undergrowth at a selected site in Hurulu forest reserve (sigiriya)(Sri Lanka Association for the Advancement of Science, 1991) Perera, B.M.S.; Solangaarachchi, S.M.Item Intraspecific neighbor effects on the growth and morphological plasticity of Salvinia molesta(Natural Resources, Energy and Science Authority of Sri Lanka, 1995) Solangaarachchi, S.M.; Hapuarachchi, H.T.Item Isolation and characterization of cellulolytic bacteria from decomposing rice straw(Natural Resources, Energy and Science Authority of Sri Lanka, 1995) Sirisena, D.M.; Manamendra, T.P.Item Pod yield on winged bean after chemical treatment for choanephora blight disease(Natural Resources, Energy and Science Authority of Sri Lanka, 1990) Gunasekera, S.A.; Shanthichandra, W.K.N.Item Some aquatic hyphomycetes from Sri Lanka(Natural Resources, Energy and Science Authority of Sri Lanka, 1984) Gunasekera, S.A.; Rukmani, M.P.R.Item Human influence on structure of mangrove vegetation in Negombo estuary(Sri Lanka Association for Fisheries and Aquatic Resources, 1999) Perera, K.A.R.S.; Amarasinghe, M.D.