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Phosphorus cycling between the colonial cyanobacterium Microcystis aeruginosa and attached bacteria, Pseudomonas

Phosphorus cycling between the colonial cyanobacterium Microcystis aeruginosa and attached... Phosphorus (P) transfer between Microcystis aeruginosa and the attached bacterium Pseudomonas was studied using radioactive P (32P) and green fluorescence protein-labeled Pseudomonas. M. aeruginosa in P-starved condition took up most 32P (70%) in water and about 50% of 32P in 32P-saturated bacteria in individual experiments. However, only 26% of 32P in the 32P-saturated M. aeruginosa was transferred to P-starved bacteria. The P-starved M. aeruginosa had an advantage to take up P over the bacteria and its growth rates and abundance were higher in combined cultures, with bacteria as the biotic P source. The rate of P transfer from bacteria to the cyanobacteria was slow. P cycles predominantly between M. aeruginosa and Pseudomonas with little variation in the water. This ability is very useful for the colony-forming M. aeruginosa, especially if phosphate concentrations in water are low during water bloom periods. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aquatic Ecology Springer Journals

Phosphorus cycling between the colonial cyanobacterium Microcystis aeruginosa and attached bacteria, Pseudomonas

Yuan, Lina; Zhu, Wei; Xiao, Lin; Yang, Liuyan
Aquatic Ecology , Volume 43 (4) – Dec 20, 2008
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References (32)

Publisher
Springer Journals
Copyright
Copyright © 2008 by Springer Science+Business Media B.V.
Subject
Life Sciences; Ecosystems; Freshwater & Marine Ecology
ISSN
1386-2588
eISSN
1573-5125
DOI
10.1007/s10452-008-9227-2
Publisher site
See Article on Publisher Site

Abstract

Phosphorus (P) transfer between Microcystis aeruginosa and the attached bacterium Pseudomonas was studied using radioactive P (32P) and green fluorescence protein-labeled Pseudomonas. M. aeruginosa in P-starved condition took up most 32P (70%) in water and about 50% of 32P in 32P-saturated bacteria in individual experiments. However, only 26% of 32P in the 32P-saturated M. aeruginosa was transferred to P-starved bacteria. The P-starved M. aeruginosa had an advantage to take up P over the bacteria and its growth rates and abundance were higher in combined cultures, with bacteria as the biotic P source. The rate of P transfer from bacteria to the cyanobacteria was slow. P cycles predominantly between M. aeruginosa and Pseudomonas with little variation in the water. This ability is very useful for the colony-forming M. aeruginosa, especially if phosphate concentrations in water are low during water bloom periods.

Journal

Aquatic Ecology – Springer Journals

Published: Dec 20, 2008

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