Alicyclic acid metabolism in plants 2. Enzymes related to the shikimate pathway in developing mung bean seedlings
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概要
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A study was made of chages in the activities of enzymes related to the biosynthesis of aromatic compounds in etiolated mung bean seedlings during their growth Shikimate: NADP oxidoreductase activity in the root-shoot axes increased rapidly to attain its highest activity the 4th day after sowing, and remained at that level over the experimental period of 7 days. 5-Dehydroquinate hydro-lyase activity continuously increased for at least 7 days. In the cotyledons, a gradual decrease in the activities of these enzymes occurred. Phenylalanine ammonia-lyase activity in root-shoot axes gradually increased showing a maximum on the 6th day. The highest specific activity, on a protein basis, of this enzyme was seen in the initial stage of growth. In the cotyledons, a rise in total activity appeared on the 2nd day. Tyrosine ammonia-lyase activity was very low as compared with phenylalanine ammonia-lyase. The enzyme activities of light-germinated seedlings were compared to those of dark-germinated seedlings on the 7th day. Light had practically no significant effect on the appearance of shikimate: NADP oxidoreductase and 5-dehydroquinate hydro-lyase activities. On the other hand, a marked effect from the light on the rise of phenylalanine ammonia-lyase and tyrosine ammonia-lyase activities was found, especially in the epicotyl-plumules. The results are discussed with respect to the metabolism of alicyclic acids such as shikimic acid in the developing mung bean seedlings.
- 日本植物生理学会の論文
著者
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Yoshida Seiichi
Department Of Hygiene Chemistry Faculty Of Pharmaceutical Sciences Science University Of Tokyo
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Minamikawa Takao
Department Of Biological Sciences Tokyo Metropolitan University
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Minamikawa Takao
Department Of Biology Tokyo Metropolitan University
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OYAMA IKUO
Department of Biology,Tokyo Metropolitan University
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Yoshida Seiichi
Deparhllent Of Biology Tokyo Metropolitan University
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Oyama Ikuo
Department Of Biology Tokyo Metropolitan University
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Minamikawa Takao
Departmen T Of Biology Tokyo Metropolitan University
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MINAMIKAWA TAKAO
Department of Biology,Tokyo Metropolitan University,
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