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应用生态学报 ›› 1994, Vol. 5 ›› Issue (4): 403-408.

• 研究论文 • 上一篇    下一篇

凤眼莲及其根际微生物共同代谢和协同降酚机理的研究

郑师章, 乐毅全, 吴辉, 汪敏, 赵大君   

  1. 复旦大学环境与资源生物系, 上海 200433
  • 收稿日期:1993-12-10 修回日期:1994-02-18 出版日期:1994-10-24 发布日期:1994-10-24
  • 基金资助:

    国家自然科学基金;国家教委博士点基金

Co-metabolic and synergic phenol-degradation mechanisms of Eichhornia crassipes and its rhizospheric microorganisms

Zheng Shizhang, Le Yiquan, Wu Hui, Wang Ming, Zhao Dajun   

  1. Fudan University, Shanghai 200433
  • Received:1993-12-10 Revised:1994-02-18 Online:1994-10-24 Published:1994-10-24

摘要: 研究表明凤眼莲在苯酚浓度不超过150μg·ml-1的水体中,不但可以在体内富集酚,而且可以通过多酚氧化酶、过氧化物酶、酚糖苷等途径降解水体中的酚类化合物;其根际微生物可以通过meta或orth途径降酚,起到共同降酚的作用。当两者结合构成生物系统,便会产生协同效应,其降酚效果可达97.5%,大大超过两者分别降酚效果之和(含酚50μg·ml-1的培养液中,10h内,无菌凤眼莲降酚仅为1.9%,假单胞菌No.5降酚37.9%).

关键词: 凤眼莲, 根际微生物, 协同降酚, 共同代谢

Abstract: The study shows that Eichhornia crassipes can not only concentrate exotic phenol compounds, but also transfer them to other non-toxic ones when grown in an environment containing <150μg. ml-1 of phenol. Its rhizospheric microorganisms can degradate the exotic phenolic compounds through meta-and orth-pathway. The co-metabolism of phenols by Eichhornia crassipes and its rhizospheric microorganisms could construct a high efficient synergic phenol-degradation biosystem: in media containing 50μg. ml-1 of phenol, Eichhoria crassing and its rhizospheric microorganisms can degradate phenol only about 1.9% and 37.9%, respectively in 10 hours, but the biosystem can degradate it up to 97.5% under the same condition.

Key words: Eichhornia crassipes, Rhizospheric microorganisms, Synergic phenol-degradation, Co-metabolism