Abstract
Various clones of tea [Camellia sinensis (L.) O. Kuntze] such as TTL-1, TTL-2, TTL-4, TTL-5, TTL-6, UPASI-2 and UPASI-3 planted in the field were subjected to soil moisture stress conditions by withholding irrigation. A control set of the same clones were maintained by watering regularly. The soil water content of the irrigated and non irrigated plants was monitored through the soil moisture status. The extent of effect of drought on tea plants were monitored through various physiological parameters such as shoot weight, leaf water potential, chlorophyll and carotenoid content, chlorophyll fluorescence (Fv/Fm), net photosynthetic rate, transpiration rate, stomatal conductance and biochemical parameters such as extent of proline accumulation and free radical generation. These parameters were studied on the 30 d of non irrigation and on the 5 d during recovery from drought. The plants recovered when re-irrigated after 30 d of non-irrigation, which suggests that permanent wilting did not occur due to non-irrigation up to 30 d. On the 30 d of non-irrigation the clones TTL-1, TTL-6 and UPASI-2 showed lesser reduction of shoot weight, leaf water potential, chlorophyll fluorescence, photosynthetic rate, transpiration rate and stomatal conductance and increased proline and lesser lipid peroxidation as compared to the other clones. From these results it can be concluded that the clones TTL-1, TTL-6 and UPASI-2 are comparatively more drought tolerant than the clones TTL-2, TTL-4, TTL-5 and UPASI-3.
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The authors are grateful to M/s. KDHP Co. Pvt. Ltd. for providing all the facilities for carrying out the study.
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Netto, L.A., Jayaram, K.M. & Puthur, J.T. Clonal variation of tea [Camellia sinensis (L.) O. Kuntze] in countering water deficiency. Physiol Mol Biol Plants 16, 359–367 (2010). https://doi.org/10.1007/s12298-010-0040-8
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DOI: https://doi.org/10.1007/s12298-010-0040-8