• 한국자원식물학회지
• /
• 제4권1호
• /
• pp.13-16
• /
• 1991

Tea plant has been mllainly grown in shade aild wet flace of several temple surroundings for a long years in sourthern area of Korea, since it has been introduced about1,000 years ago In those rlaces, it has been mostly grown in semi-wild, but recentlycultivated in a part of Bosung-gun, Cheonnanl province. External forms of tea plantwere considered that those have a little changed according to geographic andclimatic conditions of growing places. To investigate how is the variation of teaplant by the difference of environment conditions under growing places, we had ex-amined the protein and isozyme patterns of seeds of tea plant. In spite of difference ofgeographic and climatic conditions, the patterns of catalase, esterase, acid phosphat-ase isozyme and protein showed the same aspects.

• 농업과학연구
• /
• 제38권2호
• /
• pp.295-299
• /
• 2011

The content of hesperidin in the mixed tea, which was composed of dried orange peel, laurel leaf, mulberry leaf, silver magnolia leaf, oriental melon tap, cassia seed, and licorice root, was determined by high performance liquid chromatography (HPLC). Hesperidin was quantified by a reverse phase column with gradient solvent system (watcr:acetonitrile = 80:20 to 35:65 for 30 min) and UV/VIS detection (280 nm). The How rate was kept constant at 1.0 ml/min. The content of hesperidin in the mixed tea was measured in depending on extraction time 1, 2, 3, and 4 min (29.07, 52.39, 52.45, and 88.35 mg/g, respectively).

• 한국식생활문화학회지
• /
• 제24권3호
• /
• pp.308-314
• /
• 2009

In this study, we examined the composition of catechins, theaflavins and alkaloids in leaves during processing to fermented black tea, which is produced by withering, roll breaking, and fermentation of Korean Yabukida tea plant. In addition, we determined the optimal conditions for the production of fermented black tea. The average moisture content in fresh leaves was 70.85%, which dropped to 3.07% in fermented black tea at the last stage of production. When the leaves were analyzed by HPLC, seven types of catechins, four types of theaflavins and three types of alkaloids were identified. The levels of catechins, theaflavins, and alkaloids were then evaluated after being processed into fermented tea. From these experiments, we found that the level of theaflavins, which determines the property of the tea, increased during fermentation. This effect resulted from the change in EGCG, ECG, EGC, EC during the process of fermentation. We also found that the maximal amount of theaflavins was created after 1-2 hours of fermentation. Thus, our results imply that the best condition for producing fermented black tea would be to ferment for 1-2 hours.

• 한국자원식물학회:학술대회논문집
• /
• 한국자원식물학회 2019년도 춘계학술대회
• /
• pp.63-63
• /
• 2019

Tea plant (Camellia sinensis (L.) O. Kuntze) has been cultivated widely in many developing Asian, African, and South American countries, where it is the most widely consumed beverage in the world next to water. It has critical importance to understand the genetic diversity and population sturcutre for effective collection, conservation, and utilization of tea germplasm. In this study, 410 tea accessions collected from South Korea were analyzed using 21 SSR markers. Among 410 tea accessions, 85.4% (310 accessions) accessions were collected from Jeollanam-do. A total of 286 alleles were observed, and the genetic diversity and evenness were estimated to be averagely 0.79 and 0.61, respectively, across all the tested samples. Using discriminant analysis of principal components, the four clusters were detected in 410 tea accessions. Among them, cluster 1 showed higher frequency of rare alleles (less than 1%) than other clusters. Using calculation of the index of association and rbaD value, each cluster showed a clonal mode of reproduction. The result of AMOVA showed that most of the variation observed was within populations (99%) rather than among populations (1%). Our results might contribute to provide data about genetic diversity for the conservation of tea germplasm and for future breeding programs.

• 한국식물병리학회:학술대회논문집
• /
• 한국식물병리학회 1999년도 정기총회 및 춘계 학술발표회
• /
• pp.27.1-27
• /
• 1999

• 한국자원식물학회:학술대회논문집
• /
• 한국자원식물학회 2003년도 제10차 국제학술회의 및 추계정기 학술발표회
• /
• pp.34-35
• /
• 2003

Before making of tea, the number of leaf, plant height and node length in young shoot were 5.2, 14.9cm and 1,9cm respectively. These contents caused problems in leaf rolling and uniformity. No significant difference in quality and comoposition of roasted and steamed were observed, external shape and internal quality, however, were good from 1st to 3rd leaf. Chemical nutrition consists of leaf position, Total nitrogen content of terminal leaf was 4.88%, total free amino acid 21.12%, and caffein 3%. Vitamin C content was increased with increasing of leaf age. Making of roasted tea was required long time because camellia leaf was very hard and smoothly. Products had lower water color, perfume and taste. Internal quality of steamed tea was good in water color and taste. The contents of total nitrogen, total free amino acid, catechin, caffeine and vitamin C were 4.24%, 1.01, 17.7%, 2.6% and 75.7mg/ml.(중략)

• Journal of Microbiology and Biotechnology
• /
• 제20권12호
• /
• pp.1724-1734
• /
• 2010

A phosphate-solubilizing bacterial strain isolated from Hippophae rhamnoides rhizosphere was identified as Rahnella sp. based on its phenotypic features and 16S rRNA gene sequence. The bacterial strain showed the growth characteristics of a cold-adapted psychrotroph, with the multiple plant growth-promoting traits of inorganic and organic phosphate solubilization, 1-aminocyclopropane-1-carboxylate-deaminase activity, ammonia generation, and siderophore production. The strain also produced indole-3-acetic acid, indole-3-acetaldehyde, indole-3-acetamide, indole-3-acetonitrile, indole-3-lactic acid, and indole-3-pyruvic acid in tryptophan-supplemented nutrient broth. Gluconic, citric and isocitric acids were the major organic acids detected during tricalcium phosphate solubilization. A rifampicin-resistant mutant of the strain exhibited high rhizosphere competence without disturbance to the resident microbial populations in pea rhizosphere. Seed bacterization with a charcoal-based inoculum significantly increased growth in barley, chickpea, pea, and maize under the controlled environment. Microplot testing of the inoculum at two different locations in pea also showed significant increase in growth and yield. The attributes of cold-tolerance, high rhizosphere competence, and broad-spectrum plant growth-promoting activity exhibited the potential of Rahnella sp. BIHB 783 for increasing agriculture productivity.

• 동아시아식생활학회:학술대회논문집
• /
• 동아시아식생활학회 2007년도 추계학술대회
• /
• pp.15-23
• /
• 2007

Tea plant(Camellia sinensis) is one of a very few plants containing caffeine, a kind of narcotics, originates from Yunnan in China and was utilized as a medicine at the beginning and then as a drink as well as a food. The tea was introduced to Japan from China. Japanese people well developed tea manufacturing technology to produce unique teas such as Matcha(抹茶) and Sencha(煎茶), resulting in creating a culture, Tea ceremony [Chado or Sado(茶道)].

• 한국식물병리학회지
• /
• 제12권4호
• /
• pp.463-465
• /
• 1996

1992∼1994년 전남 보성지방 다원에서 2번차 수확 및 전지후의 차나무에 겹둥근무늬병의 발생이 관찰되었다. 잎에는 다갈색의 원형 내지 부정형의 병반 위에 겹둥근무늬가 형성되었고, 후기에는 병반 위에 겹둥근무늬의 소혹점(분생자층)이 다수 형성되었다. 이 병원균은 Pestalotiopsis longiseta (Spegazzini) Dai et Kobayashi로 분리, 동정되었고, 균 접종 11일 후에 병징이 관찰되기 시작하였다.

• 한국환경농학회지
• /
• 제24권1호
• /
• pp.66-70
• /
• 2005

The experiment was carried out to investigate the effects of gamma radiation on the early growth performance and physiological traits of BT2 clone tea, the most promising cultivar released by Bangladesh Tea Research Institute. The fresh shoot cuttings were irradiated with seven different levels of gamma radiation such as 0, 10, 20, 30, 40, 50 and 60 Gy from Cobalt 60Co source (Dept. of PlantBreeding, Bangladesh Institute of Nuclear Agriculture). Thereafter, the irradiated shoot cuttings were planted in polythene bags and kept under natural conditions. It was observed that callusing was initiated from 8th weeks after placement of tea shoot cuttings in the polythene bags and completed by 12th weeks. The morphological growth of tea shoot cuttings were recorded under varying levels of gamma radiation and growth stages. It was observed that the number of leaves, number of primary branches, base diameter, root length and total leaf area per plant significantly increased with the progress of time and increasing levels of gamma radiation, however, the plant height showed decreasing trend with the increasing levels of gamma radiation, which could be due to the change in chromosomal structure and genetic makeup. After 56 weeks of planting, the plant height, the number of leaves and primary branches per plant, base diameter, root length and total leaf area per plant recorded were 65.70 cm, 30.67, 7.33, 1.48 cm, 23.50 cm, and 1250.67 cm2 per plant respectively under the radiation level 60 Gy, whereas the corresponding figures of the above parameters at the control treatment were 76.21 cm, 18.33, 3.67, 0.92 cm, 17.75 cm and 778.33 cm2 per plant, respectively. A significant relationship was observed among the physiological growth parameters with the increasing levels of gamma radiation. The total dry matter gain, leaf area index, absolute growth rate and relative growth rate were significantly influenced with the rising levels of gamma radiation (up to 60 Gy), whereas the net assimilation rate of individual tea plant non-significantly responded as compared to those of control treatment. Finally after 56 weeks of planting, the maximum total dry weight gain, leaf area index, absolute growth rate, relative growth rate and net assimilation rate recorded under 60 Gay radiation level were 40.25 g/plant/week, 4.25, 1.18 g/week, 0.0621g/g/week and 17.07 g/m2/week respectively.