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RISS 인기검색어
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- 저자 : 堀裕(Hori Yutaka) (검색결과 6 건)
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金鎭漢,堀裕 충북대학교 농업과학기술연구소 1990 農業科學硏究 Vol.8 No.1
Effect of air temperature on internal and external leaf morphology and their relationship with photosynthesis rate in eggplant were studied. The results obtained were summarized as follows; 1.High temperature resulted in more vigorous growth and earlier flowering in eggplant. At 25 days after treatment, stem length and fruit weight were greater but total weight was smaller at higher temparature. On the other hand, stem diameter, stem weight, leaf weight and root weight were greater, i. e., healthier stem and leaf growth at medium temperature. Eggplant showed poor growth at low temperature. 2.Length and width of leaves and petiol length were greater in the order of medium > high > low temperature for L3 and high > medium > low temperature for L5 and L8. Leaf thickness was greater at low temperature in late growth stage. SLW was considerably greater at low temperature and the difference between medium and high temperatures was small. SLW/leaf weight of L3 was greater than that of L5 and it was increased according to the growth of leaves at low temperature, while it was decreased at other treatments. Dry weight and dry matter ratio were also greater at low temperature. 3.Although major axis of palisade cell was longer at low temperature than at medium temeprature. shorter minor axis resulted in insignificant effects of temperature on surface area and volume of the cell. Number of palisade cells and leaf cells decreased after unfolding of leaves and kept unchanged thereafter. The final value was higher in L8 than L5 and at low temperature than at medium temperature. Number of chloroplast per cell was higher in L5 than in L8 and the effect of temperature was not noticed. 4.Contents of chloroplast and soluble proteinic content were increased along with leaf growth and, then, decreased after the maximum point was reached. They were high in L8 than in L5 and at low temperature than at medium temperature. Photosynthesis rate showed the same tendency as chloroplast and soluble protenic nitrogen.
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金鎭漢,堀裕 충북대학교 농업과학기술연구소 1989 農業科學硏究 Vol.7 No.2
This study was carried out to study on the relationship between leaf development and translocation and distribution of 14^C in eggplant. L3, L4 and L5 leaves at L7, L8 and L9 leaf stage and L7, L8, L9 and L10 leaves at flowering and 3 weeks after flowering were treated with 14^C, respectively. Translocation and distribution of 14^C-photosynthate were measured to analyze the relationships and the results were summarized as follows. 1.No significant difference between total translocation rate was observed between leaf stages be-fore the first flowering. Distribution to lower leaves from treated leaf was greater at higher leaves and the rate was increased as more leaves were developed. At lower leaves, distribution to leaves was not observed and distribution ratio to stem and root was almost equal. RSS of L3 was low and influenced greatly on the distribution ratio to lower part. 2.Regardless of leaf stage, RSS was higher at near meristem and the 1st and 2nd leaf right below the meristem, while the lower leaves lost function as sink. The distribution ratio to upper leaves was great when the upper leaves were at the same row or horizontal row as the source leaf, while the ratio was low when they were at the opposite row. This indicated the possible influence of leaf position on the distribution ratio. The effect of leaf position appeared to be the same as in tomato. 3.Total translocation rate at flowering was lower in the plants at 1st flower blooming and fruit growing, and thereafter increased again during the fruit growing. 4.At flowering stage, distribution ratio to lower part was greater at the lower leaves. Although the distribtuion ratio to stem was high at the lower part, L10 distributed more to roots. On the other hand, the upper the leaves were, the lower the distribution ratio was. The distribution to leaf and stem was nearly equal, while those to flower and meristem were very low. It was appeared that the side branch and main stem depended on L9 and L10 for the supply of photosynthate, respectively. 5.The first fruit was the strongest sink at 3 weeks after flowering. Therefore, the distribution to upper parts including the 1st fruit increased considerably. However, the order of sink strength was in the order of L8 > L7 > L10 > L9. Although the difference in RSS among different plant parts was small, meristem and flower at side branch, and meristem at main stem were appeared as the strong sink to L9 and L10, respectively.
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