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Diversity 2011, 3(3), 356-374; doi:10.3390/d3030356
Article

Infection Dynamics Vary between Symbiodinium Types and Cell Surface Treatments during Establishment of Endosymbiosis with Coral Larvae

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Received: 12 July 2011; Accepted: 18 July 2011 / Published: 19 July 2011
(This article belongs to the Special Issue Coral Reef Diversity: Climate Change and Coral Reef Degradation)
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Abstract: Symbioses between microbes and higher organisms underpin high diversity in many ecosystems, including coral reefs, however mechanisms underlying the early establishment of symbioses remain unclear. Here we examine the roles of Symbiodinium type and cell surface recognition in the establishment of algal endosymbiosis in the reef-building coral, Acropora tenuis. We found 20–70% higher infection success (proportion of larvae infected) and five-fold higher Symbiodinium abundance in larvae exposed to ITS-1 type C1 compared to ITS-1 type D in the first 96 h following exposure. The highest abundance of Symbiodinium within larvae occurred when C1-type cells were treated with enzymes that modified the 40–100 kD glycome, including glycoproteins and long chain starch residues. Our finding of declining densities of Symbiodinium C1 through time in the presence of intact cell surface molecules supports a role for cell surface recognition molecules in controlling post-phagocytosis processes, leading to rejection of some Symbiodinium types in early ontogeny. Reductions in the densities of unmodified C1 symbionts after 96 h, in contrast to increases in D symbionts may suggest the early initiation of a winnowing process contributing to the establishment of Symbiodinium D as the dominant type in one-month old juveniles of A. tenuis.
Keywords: symbiosis; coral; Symbiodinium; Acropora tenuis; glycan; lectin; glycome; winnowing; symbiont dynamics; host selection symbiosis; coral; Symbiodinium; Acropora tenuis; glycan; lectin; glycome; winnowing; symbiont dynamics; host selection
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Bay, L.K.; Cumbo, V.R.; Abrego, D.; Kool, J.T.; Ainsworth, T.D.; Willis, B.L. Infection Dynamics Vary between Symbiodinium Types and Cell Surface Treatments during Establishment of Endosymbiosis with Coral Larvae. Diversity 2011, 3, 356-374.

AMA Style

Bay LK, Cumbo VR, Abrego D, Kool JT, Ainsworth TD, Willis BL. Infection Dynamics Vary between Symbiodinium Types and Cell Surface Treatments during Establishment of Endosymbiosis with Coral Larvae. Diversity. 2011; 3(3):356-374.

Chicago/Turabian Style

Bay, Line Kolind; Cumbo, Vivian Ruth; Abrego, David; Kool, Johnathan Travis; Ainsworth, Tracy Danielle; Willis, Bette Lynn. 2011. "Infection Dynamics Vary between Symbiodinium Types and Cell Surface Treatments during Establishment of Endosymbiosis with Coral Larvae." Diversity 3, no. 3: 356-374.

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