Changes in the Activities of Sucrose and Fructosan Hydrolyzing Enzymes in the Haplocorm of Timothy Plant (Phleum pratense, L.) after Cutting

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  • MINO Yosuke
    Laboratory of Environmental Botany, Obihiro University of Agriculture and Veterinary Medicine
  • MAEDA Kanzo
    Laboratory of Environmental Botany, Obihiro University of Agriculture and Veterinary Medicine

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Other Title
  • 刈取後におけるチモシー球茎中の庶糖およびフルクトサン加水分解酵素の消長について
  • 刈取後におけるチモシー球茎中の庶糖およびフルクトサン加水分解酵素の消長について〔英文〕
  • カリトリゴ ニ オケル チモシー キュウケイチュウ ノ ショ トウ オヨビ フ

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In this study were examined the changes in carbohydrates, sucrose hydrolyzing activity (SHA) (opt. pH 5.0) and fructosan hydrolyzing activity (FHA) (opt. pH 5.5) in the soluble fraction in the haplocorm of timothy plant (Phleum pratense, L.) during the regrowth after cutting. The mean fresh weight of a haplocorm was almost constant during the first 4 days and then decreased to about 5/6 of initial level. The total sugar in a haplocorm also decreased up to 20% in 20 days after cutting. Protein concentration in a haplocorm increased during the first 12 days, followed by drastic decrease. Fructosan content in the haplocorm declined gradually at the early stage and then decreased markedly during 8 to 12 days. SHA was maximum at 4 and 12 days, while FHA only at 12 day.

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