ダイコンのすいり現象に関する研究 (第1報)

DOI Web Site Web Site

書誌事項

タイトル別名
  • Studies on the pithiness of radish. I.
  • ダイコンのすいり現象に関する研究〔英文〕-1-
  • ダイコンノス イリ ゲンショウ ニ カンスル ケンキュウ エイブン 1
  • Relationship between the degree of pithiness and organic constituents in radish root

この論文をさがす

抄録

In the present study was attempted a gross analysis of the radish root to perceive the relationship between the the degree of pithiness and organic constituents. In analysing them, the author repeated the formic acid method by LEHMANN to separate organic constituents.<br>The root of Rhaphanus sativus LINN., variety Rapid Red, has been used as the material. The concentration of soluble matter tends to decreases when the tissue becomes pithy. In the fresh tissue, however, its concentration varies with the water content of individual roots. Therefore the concentration of soluble matter cannot be used as a measure of the degree of pithiness.<br>The specific gravity of tissue powder is high in non-pithy root and in the root of a strain resistant to the occurrence of pithiness. Judging from these results, the differences in the contents of cell wall material must be significant between the non-pithy tissue and the pithy one.<br>The vacuolar and protoplasmic contents, such as crude fat, starch and protein, were low in the pithy tissue, but the content of total cell wall material was inversely relative to them. These findings support the view that there is a shortage of assimilate supply in vacuole and protoplasm of pithy tissues. On the other hand total cell wall material increased slightly and the pectic substances decreased markedly in content in the root showing a high degree of pithiness. The content of hemicellulose did not change greatly in the process of pithiness in the root. This was associated not only with deposition of woody elements, but also with decrease in content of pectic substances. In conclusion, then, the occurrence of schizogenous intercellular spaces among the parenchymatous cells is due to the disappearing of pectates in the middle lamella. This isolation of cells would result in the difficulty in assimilate supply from the conducting tissue to the parenchyma and in its shortage in vacuolar and protoplasmic contents.

収録刊行物

  • 園芸学会雑誌

    園芸学会雑誌 32 (2), 114-120, 1963

    一般社団法人　園芸学会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ