Carbon-Nitrogen Transport in Response to Control of Leaf-Pod Ratio in Soybean

콩의 엽-협 비율 조절에 따른 탄소와 질소의 전류

Effects of translocation on seed yield and carbon-nitrogen compounds at five leaf-pod ratios of soybean [Glycine max. (L.)Merr. ] culti bars, 'Paldalkong', 'Baekunkong', and 'Danyeobkong' were measured. The upper 50 and lower 50% of leaves and pods were subjected to treatments at growth stage R3. Three soybean cultivars showed the similar trends on changes in dry matter accumulation and on the contents of soluble sugar, starch and protein in seeds among the treatments. Mean stem dry weight was increased with upper leaf-lower pod and lower leaf-upper pod removals, and decreased with upper leaf and lower leaf removals. Leaf dry weight was appeared higher at the upper leaves among the treatments. Seed numbers and dry weights were decreased with leaf and leaf-pod removals, and were higher in lower part of the plants. Soluble sugar and starch contents in seeds were also showed slightly higher in lower part. Protein content of seeds was decreased in upper part with upper leaf removal and in lower part with lower leaf removal, however, that of the upper seeds was the highest with lower leaf removal. The results of this study are assumed that carbon and nitrogen compounds were translocated opposite directions and protein source was weak in remobilization for the long distance transport during the reproductive growth period of soybean plants.

콩의 생식생장기인 착협시(R3)에 상부 50%와 하부 50％로 구분하여 엽제거 및 엽-협제거처리 하여 줄기, 엽 및 종실건물중과 가용성 당, 전분 및 단백질함량에 미치는 영향을 구명하기 위하여 1990년과 1991년에 고려대학교 자연자원대학 덕소 농장에 팔달콩, 백운콩 및 단엽콩을 공시하여 실시한 시험결과를 요약하면 다음과 같다. 1. 팔달콩, 백운콩 및 단엽콩 모두 건물축적과 가용성 당, 전분 및 단백질함량에 처리간 같은 경향을 보였다. 2. 평균 줄기건물중은 상엽-하협제거와 하엽-상협제거로 높았고 상엽제거와 하엽제거는 낮았다. 3. 엽건물중은 처리중에서 상부엽이 높은 경향을 나타냈다. 4. 종실수와 종실건물중은 엽 및 엽-협제거로 감소되었으나 하엽제거와 하엽-상협제거의 하부에서 높았다. 5. 가용성 당과 전분함량도 처리중에서 하부종실에서 높은 경향이었다. 6. 단백질함량은 상엽제거의 상부와 하엽제거의 하부에 감소되었으나 하엽제거의 상부종실에서 가장 높았다.