온도구배터널 내 재배온도 차이에 의한 찻잎의 생육시기, 아미노산 및 카테킨 함량 비교

Abstract

The growth time and quality of tea leaf was differed temperature during development and growth for tea plants. The study was to compare growth time, amino acid, theanine and catechin contents by difference of cultivation temperature during development and growth for Camellia sinensis var. sinensis cv. ‘Kemsull; and ‘Yabukita’ from the first harvesting season to the third harvesting season in the temperature gradient tunnel system(TGTS). The sprouting time and growth time of tea leaf in the inner region was earlier compared with the middle and the outer regions at the first harvest season and it was not differed by cultivation temperature at the second and third harvesting seasons in the TGTS. The growth and development period (from 1 bud 1 leaf to 1 bud 5 leaves) at the inner region was earlier from 3 to 17 days compared to the middle and outer regions at the first harvesting season. However, there was no difference of cultivation temperature at the second and third harvesting seasons. Also, the difference of the amino acid and theanine contents was greater by cultivation temperature (inner, middle and outer regions) at the first harvesting season than the second and third harvesting seasons. The catechin content was higher than the second harvesting seasons > the third harvesting season > the first harvesting season, and there was few difference between (-)-epigallocatechin–3- gallate(EGCG) and (-) epicatechin-3- gallate(ECG) contents in cultivars and cultivation temperature in the TGTS. The growth and development time, amino acid and theanine contents were very different at the low time about 20∼22℃ (the first harvesting season) of means cultivation temperature compared with above about 20∼22℃ of means cultivation temperature (the second and third harvesting seasons). Therefore, growth and development time, amino acid and theanine contents for tea leaf may be affected by below and above 20∼22℃ of means cultivation temperature.