甜菜主根の発育にともなうヌクレオチド類の消長,特にショ糖の生合成に関して  [in Japanese] Changes in nucleic acid related substances in the developing sugar beets, with reference to sucrose biosynthesis  [in Japanese]

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Abstract

甜菜主根の生育にともなう炭水化物,ヌクレオチド類および酵素などの量的変化を調べた。1.全可溶性糖(ショ糖)の蓄積は甜菜主根の肥大にともなって急速に増加し,それに反し還元糖は減少した。2.生育期主根から分離したヌクレオチド,糖ヌクレオチド類はAMP,ADP,ATP,UMP,UDPG,GMP,GDP,CMPである。これらのヌクレオチド類のうちUDPGは甜菜主根の生育初期には含量が少ないが生育にともなって増加した。AMP,ADP,ATP,UMPは主根の生育とともに増加した。3.ショ糖分解酵素の活性は主根の生育初期に大きくしだいに低下するが,ショ糖合成酵素活性およびホスファターゼ活性は主根の生育とともに増加した。以上の実験結果をもとに甜菜主根におけるショ糖合成の機構について考察した。

Changes in the composition of carbohydrates, soluble nucleotides and enzymes were investigated during the development of sugar beet roots. Total soluble sugars increased and accumulated during the stage of active development, whereas reducing sugars decreased. Throughout the periods of development, the compositions of nucleotides and related substances assayed by anion exchange column chromatography were adenosine monophosphate, adenosine diphosphate, adenosine triphosphate, uridine monophosphate, uridine diphosphate-glucose, guanosine diphosphate and cytidine monophosphate. Of these nucleotides, the level of uridine diphosphate-glucose was low in the initial developing stage, and then increased gradually. Adenosine monophosphate, adenosine diphosphate, adenosine triphosphate and uridine monophosphate increased throughout the stage of active development. Sucrose cleaving activity was high in young sugar beet roots and decreased gradually during later development. On the contrast, sucrose synthesizing and phosphatase activity increased throughout the stage of sugar beet root development. The mechanism of sucrose biosynthesis in sugar beet roots is discussed with reference to changes in nucleotides.

Journal

  • Research bulletin of Obihiro University Series 1

    Research bulletin of Obihiro University Series 1 7(4), 641-649, 1973-01

    Obihiro University of Agriculture and Veterinary Medicine

Codes

  • NII Article ID (NAID)
    110006453618
  • NII NACSIS-CAT ID (NCID)
    AN00034123
  • Text Lang
    JPN
  • Article Type
    departmental bulletin paper
  • Journal Type
    大学紀要
  • ISSN
    0470925X
  • NDL Article ID
    7506812
  • NDL Source Classification
    ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-435
  • Data Source
    NDL  NII-ELS  IR 
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