The effect of rhizodeposition from helophytes on bacterial degradation of phenolic compounds

Acta Biotechnologica Pub Date : 2002-05-01 DOI:10.1002/1521-3846(200205)22:1/2<107::AID-ABIO107>3.0.CO;2-#

H. Moormann, P. Kuschk, U. Stottmeister

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引用次数: 20

Abstract

The effect of rhizodeposition from helophytes (aquatic plants) on the bacterial degradation of toxic compounds such as phenolic substances was tested. Investigations were carried out as batch experiments with rhizodeposition products obtained from helophytes. DOC concentrations, which were used as points of reference for rhizodeposition, were between 2.5 and 12 mg per litre. Rhizodeposition was found to advance the biodegradation of 4-chlorophenol when using a mixed bacterial culture and pure cultures of bacteria previously isolated from Phalaris arundinacea roots. This stimulation is a result of rhizodeposition products serving as growth substrates for the bacteria. Investigations with Ralstonia eutropha (DSMZ Braunschweig, strain 5536) confirmed the function of rhizodeposition products as growth substrates. Degradation by Acinetobacter baumannii and Ralstonia sp. obtained from Phalaris arundinacea was'accompanied by the dechlorination of 4-chlorophenol. There was no enhancing impact on the degradation of the substances phenol and 2,6-dimethylphenol by rhizodeposition products.

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植物根沉积对细菌降解酚类化合物的影响

研究了水生植物(水生植物)的根沉积对细菌降解有毒化合物(如酚类物质)的影响。对从植物中获得的根沉积产物进行了批量试验。作为根沉积参考点的DOC浓度在每升2.5至12毫克之间。当使用混合细菌培养和先前从环凤尾根中分离的细菌纯培养时，发现根沉积促进了4-氯酚的生物降解。这种刺激是根沉积产物作为细菌生长基质的结果。对富营养化Ralstonia eutropha (DSMZ Braunschweig，菌株5536)的研究证实了根沉积产物作为生长基质的功能。从蝴蝶兰中获得的鲍曼不动杆菌和拉尔斯顿菌的降解伴随着4-氯酚的脱氯作用。根沉积产物对苯酚和2,6-二甲基苯酚的降解没有增强作用。

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Acta Biotechnologica

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