Prof. P.A. Nimal Punyasiri
Institute of Biochemistry, Molecular Biology and Biotechnology (IBMBB)
Publications
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Mohotti A. J., Amarathunga A. M. and Punyasiri P. A. N. (2008). Allelochemicals in tea (Camellia sinensis L.) grown soils. In: Proceedings of the 28th Annual Sessions of the Institute of Biology, held on 26 September, 2008, Colombo, Sri Lanka, 32. Abstract
High-Speed Counter-Current Chromatography for the Isolation of proanthocyanidins from tea flush
Wijekoon, W.M.A.M.B, Kumar N.S. and Punyasiri, P.A.N (2007). High-Speed Counter-Current Chromatography for the Isolation of proanthocyanidins from tea flush. In Proceedings of the Peradeniya University Research Sessions Purse 2007 , 292. Full Paper
Biosynthesis of catechins by leucoanthocyanidin reductases and anthocyanidin reductases in grape (Vitis vinifera), apple (Malus x domestica) and some other crops
Pfeiffer, J., Kühnel, C., Puhl, I., Duy, D., Punyasiri, P.A.N., Treutter, D., Forkmann, G., Fischer, T. (2006). Biosynthesis of catechins by leucoanthocyanidin reductases and anthocyanidin reductases in grape (Vitis vinifera), apple (Malus x domestica) and some other crops. Plant Physiology and Biochemistry 44, 323-334.
Preformed and Induced Chemical Resistance of tea plant against Exobasidium vexans infection
Punyasiri, P.A.N., Abeysinghe, I.S.B., Kumar. (2005). Preformed and Induced Chemical Resistance of tea plant against Exobasidium vexans infection. Journal of Chemical Ecology 31,1315-1323.
Preformed and Induced Chemical Resisatnce of tea plant against Exobasidium vexans infection
Punyasiri, P.A.N., Tanner.G, Abeysinghe, I.S.B., Kumar, V., Campbell, P.M and Pradeepa, N.H.L (2004). Preformed and Induced Chemical Resisatnce of tea plant against Exobasidium vexans infection. In Proceedings of first Symposium on Plantation Crop Research, July 8-9, 2004, Colombo, Sri Lanka. Full Paper
Host Responses to infection by Exobasidium vexasns in the tea leaves (Camellia sinensis)
Punyasiri, P.A.N., Abeysinghe, I.S.B., Kumar, V, Pradeepa , N.H.L (2004). Host Responses to infection by Exobasidium vexasns in the tea leaves (Camellia sinensis). In Proceedings of International Conference on Biodiversity and Natural Products, 26–31 January 2004, New Delhi; India Abstract
Flavonoid Biosynthesis in the Tea plant Camellia sinensis: Properties of prominent Epicatechin and Catechin Pathways
Punyasiri, P.A.N., Abeysinghe, I.S.B., Kumar, V., Treutter, D., Duy, D., Gosch, C., Maretns, S., Forkmann, G., and Fischer, T.C. (2004). Flavonoid Biosynthesis in the Tea plant Camellia sinensis: Properties of prominent Epicatechin and Catechin Pathways. Archives of Biochemistry and Biophysics 431 (1), 22-30.
Punyasiri, P.A.N., Abeysinghe, I.S.B., Kumar, V., Treutter, D., Duy, D., Gosch, C., Maretns, S., Forkmann, G., and Fischer, T.C. (2004). Flavonoid Biosynthesis in the Tea plant Camellia sinensis: In Polyphenol Communications, 22nd International Conference on Polyphenols, August 24-29,2004 Helsinki, Finland. Abstract
Punyasiri, P.A.N., Abeysinghe, I.S.B., Kumar, V., Treutter, D., Duy, D., Gosch, C., Maretns, S., Forkmann, G., and Fischer, T.C. (2004). Flavonoid Biosynthesis in the Tea plant Camellia sinensis: In Proceedings of the AFASSA Regional Symposium on Natural Products, June 16-19, 2004,Peradeniya, Sri Lanka. Abstract
Exobasidium vexans infection of leaves of tea (Camellia sinensis) increases 2,3-cis isomers and gallate esterification of proanthocyanidins
Punyasiri, P.A.N., Tanner.G, Abeysinghe, I.S.B., Kumar, V., Campbell, P.M and Pradeepa, N.H.L (2004). Exobasidium vexans infection of leaves of tea (Camellia sinensis) increases 2,3-cis isomers and gallate esterification of proanthocyanidins Phytochemistry 65, 2987–2994.
Liyange A.C, Punyasiri, P.A.N, Bandara, U.B.S and Mohamed, M.T Ziyad (2003). Two-stage drying of black tea using microwave energy. Sri Lanka Journal of Tea Science, 68 (2), 27-33
Liyange A.C, Punyasiri, P.A.N, Bandara, U.B.S and Mohamed, M.T Ziyad (2003). Microwave drying of black tea. Sri Lanka Journal of Tea Science, 68 (2), 34-43.
Chemical and biochemical basis of the resistance and susceptibility of Sri Lankan tea cultivars to blister blight leaf disease (Exobasidium vexans)
Punyasiri, P.A.N., Abeysinghe, I.S.B., Kumar, V. (2001). Chemical and biochemical basis of the resistance and susceptibility of Sri Lankan tea cultivars to blister blight leaf disease (Exobasidium vexans). In: Proceedings of International Symposium on Tea Culture, October 4-9,2001, Shizuoka, Japan. Full Paper
Study of the changes of ployphenol oxidase and peroxidase activity during drying and storage of tea
Liyange A.C, Punyasiri, P.A.N, Perera, P.S,F and Mohamed, M.T Ziyad (1997). Study of the changes of ployphenol oxidase and peroxidase activity during drying and storage of tea. Sri Lanka Journal of Tea Science, 65 (2), 56-66.
A Preliminary study of the phytoalexins produced in the tea leaf in relation to blister blight leaf disease caused by Exobasidium vexans of Tea
Nagahaulla, S.M, Herath, N.L and Punyasiri, P.A.N (1996). A Preliminary study of the phytoalexins produced in the tea leaf in relation to blister blight leaf disease caused by Exobasidium vexans of Tea. Sri Lanka Journal of Tea Science, 64 (1/2), 5-11.
High performance liquid chromatography of chlorophylls in tea leaf (Camellia sinensis)
Liyange A.C, Punyasiri, P.A.N (1993). High performance liquid chromatography of chlorophylls in tea leaf (Camellia sinensis). Sri Lanka Journal of Tea Science, 62 (1), 32-37.
Correlation of major flavanols of some tea cultivars with quality of tea
Herath, N.L, Punyasiri, P.A.N and De Silva, M.J (1993). Correlation of major flavanols of some tea cultivars with quality of tea. Sri Lanka Journal of Tea Science, 62 (1), 4-10.
An improved procedure for the separation of flavanols from tea leaves
Punyasiri, P.A.N, Herath, N.L and Amarakoon, A.M. T (1990). An improved procedure for the separation of flavanols from tea leaves. Sri Lanka Journal of Tea Science, 59 (1), 24-28.
Effect of additives on the phytoxicity of glyphosate to Panicum repens
Kathirvetpillai, A and Punyasiri, P.A.N (1989). Effect of additives on the phytoxicity of glyphosate to Panicum repens. Sri Lanka Journal of Tea Science, 62 (1), 4-10.
Effect of interplanting dadaps (Erythrina lithoperma) in tea (Camellia sinensis) on soil physical properties of an ultisol
Ananthacumaraswamy, A, Lakshmie, M.S.D and Punyasiri, P.A.N (1988). Effect of interplanting dadaps (Erythrina lithoperma) in tea (Camellia sinensis) on soil physical properties of an ultisol. Sri Lanka Journal of Tea Science, 57 (1), 11-15.
A New procedure for the separation of unoxidized polyphenol from the fresh tea flush using thin layer chromatography
Punyasiri, N, Kariyawasam, W and Herath, N (1988). A New procedure for the separation of unoxidized polyphenol from the fresh tea flush using thin layer chromatography. Proceedings of the44th Annual Sessions, Sri Lanka Society for Advancement of Science, Section E–2 (E2-43),207.Abstract
The influence of methods of weed management in tea on the surface layer properties of an ultisol
Ananthacumaraswamy, A, Watson, M, Amarasekara, A.R and Punyasiri, P.A.N (1986). The influence of methods of weed management in tea on the surface layer properties of an ultisol. Sri Lanka Journal of Tea Science, 55 (1) 28-35.
Sandanam, S, Punyasiri, P.A.N and Gamage A.K (1985). Use of Oxyflurfen as pre-emergent weed killer in young tea. Sri Lanka Journal of Tea Science, 54 (2), 73-77.
Kathirvetpillai, A and Punyasiri, P.A.N (1985). Use of Oxyfluorfen as a pre-emergent herbicide in tea. Sri Lanka Journal of Tea Science, 54 (1), 42-45.
Sandanam, S, Punyasiri, P.A.N, Perera, K.L.S.D and Gamage A.K (1982). Chemical control of illuk (Imperata cylindrica). Sri Lanka Journal of Tea Science 51 (4), 180-184.