Comparison of total polyphenol content in the tea plant (Camellia sinensis) under drought stress
سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 259
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شناسه ملی سند علمی:
BIOCONF20_721
تاریخ نمایه سازی: 28 اردیبهشت 1398
چکیده مقاله:
Tea is one of the most-consumed beverages in the world that is obtained from the processed young leaves of the tea plant (Camellia sinensis). Polyphenols are the major antioxidant compounds of tea leaves, which are responsible for health and beneficial properties of it. In addition, polyphenols are non-enzymatic antioxidants that reduce stress levels in plants, which are exposed to drought stress. In the present study, in order to induce drought stress in solid culture medium and evaluating the changes of total polyphenol content in young leaves of tea, we used polyethylene glycol 6000 (in two levels of zero and 20% w/v). The measurements of total polyphenol changes in treatments were performed at intervals of 0, 12, 24 and 72 hours after stress. This experiment was arranged in a completely randomized design with three replications. According to the results, the maximum amount of total polyphenols increased at 20% drought stress level after 12 hours which is around 16.8%. Over time, the levels of polyphenol compounds under drought stress samples were reduced, so that after 72 hours, the total polyphenol content is about 5%. Drought stress significantly decreased the content of total polyphenols in p<0.05. However, the quality of tea leaves is reduced under drought stress
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نویسندگان
Amineh Zeinali
Plant Physiology & Genetic Department, Applied Science Institute (ACECR)
Mona Kashanchi,
Plant Physiology & Genetic Department, Applied Science Institute (ACECR)
Mitra Parsa
Plant Physiology & Genetic Department, Applied Science Institute (ACECR)