Zwirglmaier, Katrin, Spence, Edward M., Zubkov, Mikhail V., Scanlan, David J. and Mann, Nicholas H.. (2009) Differential grazing of two heterotrophic nanoflagellates on marine Synechococcus strains. Environmental Microbiology, Vol.11 (No.7). pp. 1767-1776. ISSN 1462-2912

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Abstract

Grazing of heterotrophic nanoflagellates on marine picophytoplankton presents a major mortality factor for this important group of primary producers. However, little is known of the selectivity of the grazing process, often merely being thought of as a general feature of cell size and motility. In this study, we tested grazing of two heterotrophic nanoflagellates, Paraphysomonas imperforata and Pteridomonas danica, on strains of marine Synechococcus. Both nanoflagellates proved to be selective in their grazing, with Paraphysomonas being able to grow on 5, and Pteridomonas on 11, of 37 Synechococcus strains tested. Additionally, a number of strains (11 for Paraphysomonas, 9 for Pteridomonas) were shown to be ingested, but not digested (and thus did not support growth of the grazer). Both the range of prey strains that supported growth as well as those that were ingested but not digested was very similar for the two grazers, suggesting a common property of these prey strains that lent them susceptible to grazing. Subsequent experiments on selected Synechococcus strains showed a pronounced difference in grazing susceptibility between wild-type Synechococcus sp. WH7803 and a spontaneous phage-resistant mutant derivative, WH7803PHR, suggesting that cell surface properties of the Synechococcus prey are an important attribute influencing grazing vulnerability.

Item Type:	Journal Article
Subjects:	Q Science > QR Microbiology
Divisions:	Faculty of Science > Life Sciences (2010- ) > Biological Sciences ( -2010)
Journal or Publication Title:	Environmental Microbiology
Publisher:	Blackwell
ISSN:	1462-2912
Official Date:	July 2009
Volume:	Vol.11
Number:	No.7
Number of Pages:	10
Page Range:	pp. 1767-1776
Identification Number:	10.1111/j.1462-2920.2009.01902.x
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	UK Natural Environment Research Council
Grant number:	NE/D010586/1
URI:	http://wrap.warwick.ac.uk/id/eprint/27698

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