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노린재 흡즙이 차엽의 카테킨 및 아미노산 함량에 미치는 영향
송연상(Yeon-Sang Song),한선경(Seon-Kyeong Han),문윤호(Youn-Ho Moon),정병춘(Byeong-Choon Jeong),방진기(Jin-Ki Bang) 한국차학회 2008 한국차학회지 Vol.14 No.2
차나무 재배시 문제해충 중의 하나인 노린재의 흡즙피해를 받은 차엽의 기능성분 변화를 알아보기 위하여 실험한 결과를 요약하면 다음과 같다. 1. 피해엽의 수분함량, 탄닌함량, 총질소 함량은 정상엽에 비하여 낮은 수준을 나타내었다. 2. 카페인 함량은 차이가 미미하였으며 카테킨 함량은 피해엽이 정상엽에 비하여 훨씬 낮아졌다. 특히 EGCG의 함량변화가 크게 나타났다. 3. 아미노산함량 또한 피해엽이 정상엽보다 낮았는데 프로린과 페닐알라닌 함량에서 큰 차이를 보였다. 4. 차나무 계통 W2-1은 피해엽에서 정상엽보다 더 높은 아미노산 함량을 나타내었다. The true bugs are one of the problem insect decreasing tea quality by sucking to young leaves of tea plant. The purpose of this study was to understand the quality changes of tea leaves according to the sucking by true bugs. The damaged 8 accessions and the normal 8 accessions were selected on the tea germplasm garden and analyzed. Water content in damaged tea leaves showed lower than that of normal leaves. In case of average tannin content, it was observed slightly low in damaged leaves, whereas the normal leaves showed low tannin content among the same accessions. Total nitrogen, caffeine, and amino acid content, the important factors related to tea quality, showed highly in normal tea leaves compare to damaged tea leaves. It showed more difference between damaged and normal tea leaves in the same 3 accessions than that of among different 16 accessions. Therefore, it is important that we have to carefully control to insect in tea cultivation, because bugs sucking will be decrease tea quality. In addition, W2-1, accession name, showed high amino acid content in damaged tea leaves as 1,145 mg% compare to normal tea leaves with 973 mg%. It was considered that it is need to further study to understand the reason.
Variation of Total Nitrogen and Tannin Contents in Collected Wild Tea Trees
Yeon Sang Song(송연상),Seon Kyeong Han(한선경),Youn Ho Moon(문윤호),Byeong Choon Jeong(정병춘),Jin Ki Bang(방진기) 한국차학회 2005 한국차학회지 Vol.11 No.3
The purpose of this study was to select the predominant tea trees with high contents of nitrogen and tannin in the wild tea germplasms collected at Jeonnam province in 1988. The tea germplasms were first grown in the same field, and then analyzed for total nitrogen and tannin contents in 263 and 293 accessions, respectively. No fertilizer or any similar treatment has been applied to the tea trees since they were planted. Ninety-six percent of the analyzed 263 accessions had mainly 3.0-5.0% total nitrogen content. However, Wolchul 1-10, the accessions name, showed the highest total nitrogen content as 6.34percent. On the other hand, the average tannin content was 9.88±3.98% and ranged from 4.29% to 22.64%. The Moodeung group showed the highest tannin content as 12.55±3.4%, while the Boseong group had the lowest tannin as 6.78±2.0%. The tannin content was distributed mainly from 5 to 15%. Among the 293 accessions, 18 accessions had below 5% tannin content and 4 accessions had more than 20%.
송연상(Yeon-Sang Song),한선경(Seon-Kyeong Han),문윤호(Youn-Ho Moon),정병춘(Byeong-Choon Jeong),방진기(Jin-Ki Bang) 한국차학회 2008 한국차학회지 Vol.14 No.1
Unlike vegetative parts, the reproductive parts of tea plant are more discrete and show relatively less variation. They therefore provide more reliable diagnostic criteria. The purpose of the study is to got informations of the flower structure and variations on the wild tea germplasm collected from Jeonnam province in Korea. 331 wild tea samples were used in this study, namely, 144 accessions from Wolchul mountain, 178 accessions from Moodeung mountain, and 9 accessions from Boseong district, and all were collected within the Jeonnam province. Another 9 improved cultivars from Japan were also used for comparison. The collected wild tea plants and the Japanese tea cultivars have mainly medium flowers except for the 16 accessions (9%) from Moodeung mountain have large flowers. The length of stigma and stamen differed among the Korean tea accessions, whereas the Japanese cultivars were similar. Many Korean wild tea plants (over 65%) showed high position of stigma with 98 accessions (55.1%) from the Moodeung mountain group and 82 accessions (56.9%) from the Wolchul mountain, but the Japanese tea cultivars showed low position (below 65%). In the density of ovary pubescence, the Japanese tea cultivars showed medium character due to artificial crossing between Camellia assamica and Camellia sinenses. It was considered that the Korean wild tea plants have varietal distribution due to many natural crossing with unknown pathways.
송연상(Yeon-Sang Song),문윤호(Youn-Ho Moon),한선경(Seon-Kyeong Han),정병춘(Byeong-Choon Jeong),방진기(Jin-Ki Bang) 한국차학회 2005 한국차학회지 Vol.11 No.2
수집된 야생 차나무 유전자원을 동일포장에 재식한 후 집단 간, 집단 내 형태적 특성과 변이를 조사 분석하였다. 차나무는 집단 간, 집단 내 변이가 매우 크게 나타났는데 특히 신아수, 신아장, 엽면적, 생체중, 엽색의 변이가 컸다. 엽형지수는 2.5±0.3으로 나타났고 잎의 엽록소 함량은 엽차계의 L, b 값과는 역의 상관, a값과는 정의 상관을 보였으며 그 값은 -0.98였다. 신아수와 신아장, 신아당 엽수는 부의 상관이었고 엽폭, 거치수, 엽맥수, 엽병장은 엽장과 유의적인 상관관계가 없고 서로 독립적이었다. 집단간 엽형지수는 보성군 수집집단이 2.50으로 가장 큰 경향을 보였고 무등산 수집집단이 가장 작게 나타났다. 차의 엽색은 월출산 수집집단의 L값이 26.4±7, a값이 -17.2±6.4, b값이 25.1±11.8로 잎이 어두운 농록색을 나타내었으며 보성군 수집집단과 무등산 수집집단은 L값이 높아 잎 표면이 밝은 색이지만 연녹색으로 보이는 계통이 많았다. 월출산 수집집단은 신아장, 엽수, 엽장, 엽면적, 총엽면적, 생체중, 엽색에 있어서 비교우위에 있었고 보성군 수집집단은 신아수, 엽두께에서 우세하였으며 무등산 수집집단은 엽병장, 엽맥수, 거치수에서 우세하였다. The purpose of this study was to improve the understanding of the morphological characteristics and variations on the wild tea germplasm collected from Jeonnam province in 1988. Within the limits of this investigation among the morphological characteristics, many variations were observed in the number of stem, stem length, leaf area, fresh weight and leaf color. Index of leaf shape showed as 2.5±0.3 and chlorophyll contents of tea leaf showed significantly negative correlation with a value of colorimeter as -0.98. Negative correlation was observed in the number of stem and stem length, number of leaf. No correlation was observed in leaf width, number of serration, number of vein and petiole length. Number of shoot in the group collected from Boseong was more abundant than those from Moodeung Mountain and Wolchul Mountain. But the group collected from Wolchul Mt. showed the longest length of shoot among the collected groups. Also, number of leaf per shoot, leaf area, leaf length, and fresh weight were highest in the group collected from Wolchul Mt. The color of tea leaf of the group collected from Wolchul Mt. was more dark green than that from other groups.