ダイコン子葉の葉緑体発生に関する研究(4) : リンゴ酸脱水素酵素について

島根大学農学部研究報告 Volume 7 Page 129-134 published_at 1973-12-15
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Title
ダイコン子葉の葉緑体発生に関する研究(4) : リンゴ酸脱水素酵素について
Title
Studies on the Chloroplast Development in Radish Cotyledons(4) : on Malate Dehydrogenases
Title Transcription
ダイコン シヨウ ノ ヨウリョクタイ ハッセイ ニ カンスル ケンキュウ 4 リンゴサン ダツ スイソ コウソ ニツイテ
Creator
Ochiai Hideo
Kono Yasuhisa
Source Title
島根大学農学部研究報告
Bulletin of the Faculty of Agriculture, Shimane University
Volume 7
Start Page 129
End Page 134
Journal Identifire
ISSN 0370940X
Descriptions
ocalization, properties and time courses of malate dehydrogenases in greening radish cotyledons were studied as well as an inhibitory effect of 4-thiouridine upon the enzymes. Results obtained are as follow.
1) Chloroplast fraction isolated from the radish cotyledon cells contained <NAD>^+ specific malate dehydrogenase, the specific activity of which decreased as the development of the chloroplast proceeded on illumination.
2) Non-chloroplast fraction contained <NADP>^+-malate dehydrogenase and malic enzyme. Cofactor of the <NADP>^+_malate dehydrogenase could be replaced by <NAD>^+ with a slight decrease of the specific activity. Malic enzyme required <NADP>^+ as a specific cofactor. Specific activities of both the enzymes remained unchanged with illumination time.
3) <NAD>^+_malate dehydrogenase of the chloroplast was inhibited by the presence of 4-thiouridine (1-5mM), but malic enzyme in the cytoplasm was not.
Based upon these observations, biological significance of <NAD>^+_malate dehydrogenase in the developing chloroplast was discussed.
Language
jpn
Resource Type departmental bulletin paper
Publisher
島根大学農学部
Shimane University, Faculty of Agriculture
Date of Issued 1973-12-15
Access Rights open access
Relation
[NCID] AN00108015