Abstract
Plants of teak (Tectona grandis L.f.) growing after transplantation to fertile soil for 5 - 6 months were subjected to water stress by withholding watering continuously for 3 weeks. The growth rates of both plants in height and developing leaves in length were unaffected during the first week after withholding watering, but they were decreased by about 50 % during the second week and became negligible during the third week of water stress treatment. The rate of leaf production and internodal elongation were also decreased in plants experienced 2 weeks of water stress. However, after rewatering, these plants regained growth potential and exhibited high rates of leaf expansion and plant growth comparable to those of well-watered plants. Diurnal course of net photosynthetic rate (PN) of plants subjected to water stress for 2 weeks was similar as that of well-watered plants. However, PN of plants subjected to water stress for 3 weeks was reduced in the afternoon. Similarly, stomatal conductance (gs) and transpiration rate (E) of plants experiencing 3-week water stress were decreased in the afternoon. Soon after rewatering, PN, gs and E reached similar values to those of well-watered plants.
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Rajendrudu, G., Naidu, C. Effects of water stress on leaf growth and photosynthetic and transpiration rates of Tectona grandis. Biologia Plantarum 40, 229–234 (1997). https://doi.org/10.1023/A:1001016619707
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DOI: https://doi.org/10.1023/A:1001016619707