Tropical Agricultural Research & Extension
Permanent URI for this collectionhttps://dl.nsf.gov.lk/handle/1/7960
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Item Physiological responses for moisture stress and development of an index for screening coconut (Cocos nucifera L.) genotypes for drought tolerance(Faculty of Agriculture-University of Ruhuna. Kamburupitiya, 2006) Lakmini. W.G.D.; Nainanayake, N.P.A.D.; De Costa, W.A.J.M.Item Water relations of clonal tea (camellia sinensis L.) with reference to drought resistance ii. effect of water stress(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Wijeratne, M.A.; Fordham, R.; Anandacumaraswamy, A.Item Varietal variation in stmatal conductance, transpiration and photosynthesis of commercial sugarcane varieties under two con-trasting water regimes(University of Ruhuna. Matara, 2009) De Silva, A.L.C.; De Costa, W.A.J.M.Item Water relations of clonal tea (Camellia sinensis L.) with reference to drought resistance I. diurnal variations(University of Ruhuna. Kamburupitiya, 1998) Wijeratne, M.A.; Fordham, R.; Anandacumaraswamy, A.The diurnal variations of water relations of the tea plant were studied using potted young tea plants with particular reference to drought tolerance. Glasshouse experiments showed that the diurnal changes of plant water relations of tea are largely governed by the environmental factors such as solar radiation and saturation vapour pressure deficit. Accordingly, diffusive resistance and relative water content of both drought tolerant and susceptible clones were low during the mid day. Drought tolerant tea clones possess higher stomatal diffusive resistance, lower transpiration rates and higher leaf turgidity over the day time. Moreover, they conserve moisture by reducing transpiration rate at the latter part of the day earlier than that of drought susceptible clones.