Lookup NU author(s): Dr Jan Dolfing,
Dr Yonghong Wu
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© 2020 Elsevier LtdDue to its extensive application in agriculture as a germinating agent and growth promoter, indole acetic acid (IAA) is present in a variety of aquatic ecosystems. To explore the response of microbial aggregates to exogenous IAA in aquatic ecosystems, periphytic biofilm, a typical microbial aggregate, was exposed to IAA at different concentrations. Results reveal an unexpected concentration-dependent effect of IAA on periphytic biofilm. Concentrations of IAA less than 10 mg/L inhibit periphytic growth, but stimulate growth when the IAA concentration exceeds 50 mg/L. Periphytic biofilm adapts to different IAA concentrations by antioxidant enzyme activation, community structure optimization and carbon-metabolism pattern change, and promotes bioremediation of IAA contaminated water in the process. The removal rates of IAA reached up to 95%–100%. This study reveals the capacity of periphytic biofilm for IAA removal in practice.
Author(s): Wang S, Ma L, Xu Y, Wang Y, Zhu N, Liu J, Dolfing J, Kerr P, Wu Y
Publication type: Article
Publication status: Published
Journal: Bioresource Technology
Print publication date: 01/05/2020
Online publication date: 29/01/2020
Acceptance date: 25/01/2020
ISSN (print): 0960-8524
ISSN (electronic): 1873-2976
Publisher: Elsevier Ltd
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