Variation of bacterial community associated with Phaeodactylum tricornutum in response to different inorganic nitrogen concentrations
Specific bacterial communities interact with phytoplankton in laboratory algal cultures. These communities influence phytoplankton physiology and metabolism by transforming and exchanging phytoplankton-derived organic matter. Functional bacterial groups may participate in various critical nutrients...
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Published in | Acta oceanologica Sinica Vol. 37; no. 12; pp. 118 - 128 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Beijing
The Chinese Society of Oceanography
01.12.2018
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Specific bacterial communities interact with phytoplankton in laboratory algal cultures. These communities influence phytoplankton physiology and metabolism by transforming and exchanging phytoplankton-derived organic matter. Functional bacterial groups may participate in various critical nutrients fluxes within these associations, including nitrogen (N) metabolism. However, it is unclear how bacterial communities and the associated algae respond to changes of phycosphere N conditions. This response may have far-reaching implications for global nutrient cycling, algal bloom formation, and ecosystem function. Here, we identified changes in the bacterial communities associated with
Phaeodactylum tricornutum
when co-cultured with different forms and concentrations of N based on the Illumina HiSeq sequencing of 16S rRNA amplicons. Phylogenetic analysis identified Proteobacteria and Bacteroidetes as the dominant phyla, accounting for 99.5% of all sequences. Importantly, bacterial abundance and community structure were more affected by algal abundance than by the form or concentration of inorganic N. The relative abundance of three gammaproteobacterial genera (
Marinobacter, Algiphilus
and
Methylophaga
) markedly increased in N-deficient cultures. Thus, some bacterial groups may play a role in the regulation of N metabolism when co-cultured with
P. tricornutum
. |
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ISSN: | 0253-505X 1869-1099 |
DOI: | 10.1007/s13131-018-1272-7 |