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김판기,이갑연,허성두,김선희,이은주,Kim, Pan-Gi,Lee, Kab-Yeon,Hur, Seong-Doo,Kim, Sun-Hee,Lee, Eun-Ju 한국생태학회 2003 Journal of Ecology and Environment Vol.26 No.6
차광처리에 의한 가시오갈피의 생상촉진현상을 구명하기 위해서, 차광막으로 전천광을 55%, 75%, 90% 차광 처리한 조건과 노지에서 3년간 생장한 개체의 기관별 건물중을 조사하고, 광-광합성곡선과 A-Ci곡선을 통하여 광합성계의 특성을 조사하였다. 그 결과 75%의 차광조건에서는 지하부에 대한 지상부의 비율이 높아지는 현상이 있었으나, 가장 높은 건물중을 나타내 생장촉진에 효율적임이 확인되었다. 그리고 차광처리에 의해서 엽면적당의 엽록소 a+b 함량과 a/b가 감소하고 잎이 얇아지는 반응을 나타냈으며, 개엽 및 개체 당의 엽면적이 증가하는 등의 낮은 광도에 대한 적응반응이 확인되었다. 광합성계에서는 차광처리에 의해서 순양자수율(apparent quantum yield)이 높아지고 광보상점이 낮아졌으며, 탄소고정효율(carboxylation efficiency)과 재인산화속도가 상승하였다. 그러나 순양자수율은 차광처리구의 건물중 상승과는 대응되지 않는 결과를 나타내는 반면에 탄소고정효율은 건물중 상승과 대응된 결과를 나타내, 차광처리구의 광합성능력 증가가 탄소고정계의 활성증가에 기인함이 시사되었다. 광합성에 대한 수분이용효율은 차광처리구가 대조구에 비하여 약간 낮았으나, 모든 차광처리구가 포플러류와 같은 양수에 비해 높은 값을 나타냈다. This study was conducted to investigate and effects of shading treatment on photosynthetic activity of Acanthopanax senticosus. We investigated plant growth, light response curve and A-Ci curve to photosynthesis of A. senticosus at 55%, 75%, and 90% shading treatment. As results, the ratio of above-ground/under-ground biomass was increased at 75% shaded condition and showed highest dry biomass. Under shaded conditions, plants had lower chlorophyll a+b content and a/b ratio and also showed thinner leave. But shaded plants showed higher leaf area and higher total leaf area per a plant. This apparently indicates adapted responses to shaded treatment. Effects of shading treatments on photosynthetic activity were higher in apparent quantum yield, carboxylation efficiency, re-phosphrylation but lower in light compensation point. These results suggested that higher photosynthesis rates in shaded treatments were due to activated carboxylation efficiency. Shading treatment had lower water use efficiency thatn controls but still higher than other tree species.
우리 나라 野生 차나무(Camellia sinensis L.) 集團의 葉型變異
송정호(Jeong-Ho Song),이갑연(Kab-Yeon Lee),박용구(Young-Goo Park) 한국차학회 2010 한국차학회지 Vol.16 No.1
Thirty-eight wild tea populations were subjected to multivariate analysis for 10 characteristics of leaf morphology. Wild tea plants were distributed in the region from 340 41' north to 360 03' north latitude, but most were grown in the region of350 north latitude. For the ten leaf morphological characteristics, the mean values were 7.83 cm for blade length, 3.28 cm for maximum width, 2.41 cm for blade length/maximum width, 2.76 cm for upper 1/3 width, 2.54 cm for lower 1/3 width , 1.11 for upper 1/3 width / lower 1/3 width, 0.45 cm for petiole length, 0.1 7 mm for leaf thickness, 18.6 cm 2 for leaf area, and 23 .9 ea. for number of serrations. Nested analysis showed statistically significant differences for the 10 quantitative characteristics among populations as well as among individuals with in populations Contributions of variance between individuals within a population regarding the leaf characteristics, excluding blade length, upper 1/3 width / lower 1/3 width, and number of serrations, were higher than those between populations. Cluster analysis using complete linkage method showed three groups to Euclidean distance 1.9. However, populations that were close geographically did not show a tendency to cluster into the same group. Based on the results of the principal component analysis for morphological characteristics, 3 principal components (PC) appeared to be major variables due to a load ing contribution of84.9%. The first PC was blade length, maximum width, upper 1/3 width, lower 1/3 width, and leaf area, the second was blade length/maximum width and number of serrations, and the third was petiole length.