IMR Press / FBL / Volume 11 / Issue 2 / DOI: 10.2741/1934

Frontiers in Bioscience-Landmark (FBL) is published by IMR Press from Volume 26 Issue 5 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.

Open Access Article

A novel bacterium Saprospira sp. strain PdY3 forms bundles and lyses cyanobacteria

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1 National Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences, Peking University, Beijing 100871, P.R. China
2 Forestry Department, North-East Forestry University, Harbin 150040
3 Key Laboratory of Yunnan Agriculture Biotechnology, Kunming 650223
4 College of Environmental Sciences, Peking University, Beijing 100871, P. R. China
Front. Biosci. (Landmark Ed) 2006, 11(2), 1916–1923; https://doi.org/10.2741/1934
Published: 1 May 2006
Abstract

A helical filamentous cyanobactericidal bacterium was isolated from Dianchi Lake, a eutrophic freshwater lake in Kunming City of the Yunnan Province in China using a special solid medium. This species was designated strain PdY3. This bacterium was identified as a novel Saprospira sp. on the basis of its morphological characteristics and 16S rDNA sequence. Strain PdY3 showed apparent group behavior on the solid medium, forming orderly, bundle-like group structures. These bundles moved as groups. Individuals in a bundle responded to the bundle as a whole. PdY3 also showed group behavior and formed a three-dimensional reticular structure when co-cultured with Anabaena in liquid media. This helical bacterium lysed cyanobacteria through direct contact and its group behavior greatly accelerated the cyanobactericidal process. Our experiments showed that PdY3 caused lysis of 64% of Anabaena cells within 1 day and that its cyanobactericidal range was broad. These results underscore potential application of Saprospira on the control of blooms of cyanobacteria. PdY3 group behavior might allow a more efficient capture of bacterial prey.

Keywords
Saprospira
caynobactericidal activities
group behavior
16S rDNA
isolation
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