Browsing by Author "Damayanthi, M.M.N."

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Identification of Drought Tolerance Accessions of Tea (Camellia Sinensis) in Uva Region of Sri Lanka
    (Uva Wellassa University of Sri Lanka, 2012) Rasith, M.J.A.; Damayanthi, M.M.N.; Alwis, L.M.H.R.
    Droughts are one of the major and ever present threats that adversely effect on the plant growth and yield all over the world (Stephens and Carr, 1989). Plant water stress, caused by drought has major impact on plant growth and development. Growth of tea is also adversely affected by the plant water deficits created by lack of soil moisture (Smith, et al., 1994). Drought causes the losses to the tea industry. Planting of drought tolerant cultivars is the most efficient solution to maintain the productivity. Hence this study attempted to identify drought tolerant ability of TAI 5000 series accessions that can be grown in Uva region.
  • Thumbnail Image
    Item
    Selection of Climate Resilient Tea Cultivars for Uva Region
    (Uva Wellassa University of Sri Lanka, 2019) Weerasinghe, D.N.; Wijeratne, T.L.; Ranawana, S.R.W.M.C.J.K.; Damayanthi, M.M.N.
    Tea being a highly climate sensitive plant, the climate change drastically affects on its productivity. Therefore, an experiment was conducted to identify climate resilient tea cultivars specifically for Uva region. Two standard cultivars (TRI 2023 – drought susceptible and TRI 2025 – drought tolerant) and five accessions (17, 89, 199, 208 and 243 taken from the upcoming series) were evaluated for C stocks, N stocks, yield components and physiological parameters. C stock, N stock, weight of shoots per unit area and dry weight per shoot, photosynthetic rate, leaf temperature, stomatal conductance, transpiration rate, relative water content and water use efficiency were significantly differed among cultivars. The climate resilient ability of these cultivars was statistically analyzed using cluster analysis. Two accessions (199 and 17) were clustered with TRI 2025 showing the highest C and N stocks while having higher dry weight per shoot, weight of shoots per unit area, relative water content and water use efficiency. Other three accessions (89, 208 and 243) were clustered together and appeared in an intermediate group. No any cultivar was clustered with TRI 2023. According to early results, TRI 2025, accessions 199 and 17 can be considered as climate resilient and the accessions 89, 208 and 243 can be suggested as intermediately climate resilient. The climate resilience ability of TRI 2023 is appeared to be very poor. Experiment will be repeated to confirm these results.