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应用生态学报 ›› 1993, Vol. 4 ›› Issue (1): 78-84.

• 研究论文 • 上一篇    下一篇

凤眼莲根分泌物对Enterobacter sp.nov.苯酚代谢的影响

吴辉2, 郑师章1   

  1. 1. 复旦大学环境与资源生物系, 上海 200433;
    2. 中国科学院上海植物生理研究所
  • 收稿日期:1992-04-06 修回日期:1992-07-27 出版日期:1993-01-25 发布日期:1993-01-25
  • 基金资助:

    国家自然科学基金资助项目

Effect of root exudates from Eichhornia crassipes on phenol-degrading Enterobacter sp. nov

Wu Hui2, Zheng Shizhang1   

  1. Department of Environmental and Resources Biology, Fudan University, Shanghai 200433
  • Received:1992-04-06 Revised:1992-07-27 Online:1993-01-25 Published:1993-01-25

摘要: 本文利用从含酚废水中筛选出新的高效降酚菌株(Enterobactersp.nov.)和凤眼莲根分泌物来探讨风眼莲与细菌之间松散的、非特异性的降酚机理.研究了风眼莲分泌物及其不同的组分对Enterobactersp.nov.生长、降酚酶活性和降酚效率的影响.结果表明,低浓度的根分泌物(≤1%V/V)促进细菌生长,提高降酚效率,而高浓度的根分泌物(≥10%V/V)虽能促进细菌生长,但会抑制细菌降酚酶的诱导,降低降酚效率.凤眼莲根分泌物各组分中还原糖是影响Enterobactersp.nov.降酚的关键因子.提出了人工组建凤眼莲和Enterobactersp.nov.系统,提高降酚效率的可能性.

关键词: 凤眼莲, 根分泌物, Enterobacter sp. nov., 降酚

Abstract: This paper studies the effect of root exudates and their fractions (amino acid, organic acid and reducing sugars) from Eichhornia crassipes on the growth, enzyme activity and phenol-degrading efficiency of Enterobacter sp. nov. The root exudates and their fractions at low concentrations (≤1%) show a stimulatory effect, but at high eoneentrations (≥10%), they inhibit the induction of phenol-degrading enzymes and reduce the efficiency of phenol-degradation while stimulate the growth of Enterobacter sp. nov. It is demonstrated that sugar fractions of root exudates are effective on phenoldegradation, and hence, it is possible to establish a phenol-degrading system with E. crassipes and Enterobacter sp. nov.

Key words: Eichhornia crassipes, Root exudates, Enterobacter sp. nov., Phenol-degradation