| Project/Area Number |
07456017
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
園芸・造園学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SUGIYAMA Noboru The University of Tokyo, Graduate School of Agricultural and Life Sciences, Associate professor, 大学院・農学生命科学研究科, 助教授 (30012040)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥6,600,000 (Direct Cost: ¥6,600,000)
Fiscal Year 1996: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1995: ¥5,500,000 (Direct Cost: ¥5,500,000)
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| Keywords | Head formation / Lettuce / Fructan / 結球現象 / 炭水化物 |
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| Research Abstract |
Remobilization of carbohydrates accumulated in stem tissues was investigated by monitoring changes in carbohydrate types and quantities in leaves and stems during the growth of crisphead lettuce (Lactuca sativa L.var.Gokuwasesisuko). Fructose, glucose and sucrose were the main non-structural carbohydrates in leaves. No accumulation of fructan was detected in leaves, with the exception of wrapper leaves. On the other hand, fructan and sucrose were the dominant non-structural carbohydrates in stems, with fructose and glucose present at low concentrations. Fructans with a degree of polymerization (DP) 3 decreased at the latter stage of head formation, with a concomitantly increase in Fructans with a high DP.DP3-10 fructans increased or stayd constant at the latter stage of the head formation. Fructan accumulations was correlated with an increase in the ratio of stems to aerial parts in terms of dry matter. These results suggested that fructans accumulated in stem tissues are not hydrolyzed and translocated into head leaves.
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