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Detection of Acylated Homoserine Lactone (AHL) in the Heterotrophic Bacteria Z-TG01 and Its Ecological Action on the Algae, Chlorella vulgaris

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Title:Detection of Acylated Homoserine Lactone (AHL) in the Heterotrophic Bacteria Z-TG01 and Its Ecological Action on the Algae, Chlorella vulgaris
Authors:Tang, Xuexi
Bi, Xiangdong
Xing, Kezhi
Zhou, Wenli
Keywords:Chlorella vulgaris
bacteria Z-TG01
quorum sensing
acylated homoserine lactones (AHL)
ecological action
LC Subject Headings:Fish culture--Israel.
Fish culture.
Date Issued:2012
Series:The Israeli Journal of Aquaculture - Bamidgeh
Abstract:Heterotrophic bacteria Z-TG01 was isolated from the phycosphere of Chlorella vulgaris and identified as Sphingomonas paucimobilis by VITEK 2 Compact automated system with an excellent confidence level (99.0% probability). We detected acylated homoserine lactones (AHL) bioactivity in the growth process of Z-TG01 using Agrobacterium tumefaciens KYC55. The effects of C. vulgaris on AHL bioactivity, as well as the mutual influence of C. vulgaris and Z-TG01 in a co-culture system, were investigated. Results showed that AHL bioactivity of bacteria Z-TG01 varied with the bacteria density and was inhibited by supernatants of C. vulgaris culture in the early and middle exponential phases within 2 h (p<0.01), and in the late exponential phase within 1.5 h (p<0.05 or p<0.01). Within a certain cell density, bacteria Z-TG01 and C. vulgaris promote mutual growth in a co-culture system.
Pages/Duration:7 pages
URI/DOI:http://hdl.handle.net/10524/31822
ISSN:0792-156X
Appears in Collections: Volume 64, 2012


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