Changes in Antioxidative Responses to Low Temperature in Tea[Camellia sinensis (L) O. Kuntze] Cultivars
نویسنده
چکیده
Effect of low temperature stress treatment in five selected clones of Camellia sinensis (T-17, TV-19, TV-25, TV-29, TV-30) was found to be significant. Guaiacol Peroxidase (GPX) decreased with decreasing temperature. PPO decreased with decreasing temperature showing highest activities at 20°C in all clones. CAT activit ies decreased in T-17, TV29, and TV-30 with decrease in temperature with exceptions in TV-19, and TV25 which showed increase catalase ( CAT) and guaiacol peroxidase (GPX) activ ities. A decreasing trend of lip id peroxidation was observed in all the clones with decreasing temperature. Total phenolics content was highest in all clones at 20°C with exception in TV30, which showed lowest at 20°C. Total sugar content was found to be highest in all clones treated at 20°C. The present study indicates that various clones of tea showed a range of physiological and biochemical sensitivities under a low temperature stress
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