Inhibitory Action of Dissoled Humic Substances on the Growth of Soil Bacteria Degrading DDT
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概要
- 論文の詳細を見る
Dissolved humic acid (HA) and fulvic acid (FA) prepared from a Dando brown forest soil (Typic Dystrochrept) inhibited the growth of soil bacteria degrading DDT (1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane) in the culture. The population of DDT-degrading Gram-variable rod B116 decreased by the application of both HA and FA, suggesting the presence of bactericidal effect. Such inhibitory effect was stronger for HA and resulted in a lower degrading activity of DDT in the culture of B116. No inhibitory effect was observed on the growth of DDT-degrading Bacillus sp. B75. The electron spin resonance spectra showed the presence of organic free radicals in both HA and FA. The relative concentration of the radicals was higher in HA. Storage of HA solution for 3 months at 4℃ decreased the concentration of the radicals as well as the inhibitory action. The addition of catalase decreased the inhibitory effect of humic acid. It is suggested that a hydroxy radical, which is derived from free radicals of humic substances, is involve in the inhibition of bacterial growth and degradation of DDT.
- 社団法人日本土壌肥料学会の論文
著者
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Katayama A
Nagoya Univ. Nagoya Jpn
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Katayama Arata
Graduate Schooi Of Bioagricultural Sciences Nagoya University:(present Address)research Center For A
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Katayama Arata
School Of Agricultural Sciences Nagoya University
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Katayama Arata
Department Of Civil Engineering Nagoya University:department Of Civil Engineering Nagoya Universityd
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Katayama Arata
Laboratory Of Soil Science School Of Agriculture Nagoya University
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KUWATSUKA Shozo
Laboratory of Soil Science, School of Agriculture, Nagoya University
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Kuwatsuka S
Graduate School Of Bioagricultural Sciences Nagoya University
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Kuwatsuka Shozo
Laboratory Of Soil Science Faculty Of Agriculture Nagoya University
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Fujimura Yoshiki
School of Agricultural Sciences, Nagoya University
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Fujimura Yoshiki
Laboratory of Soil Biology and Chemistry, School of Agriculture, Nagoya University
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Katayama Arata
Laboratory Of Soil Biology And Chemistry School Of Agricultural Sciences Nagoya University
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Fujimura Yoshiki
School Of Agricultural Sciences Nagoya University
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