Global diversity and distribution of close relatives of apicomplexan parasites

0498758 - BC 2019 RIV GB eng J - Článek v odborném periodiku
Mathur, V. - del Campo, J. - Kolísko, Martin - Keeling, P. J.
Global diversity and distribution of close relatives of apicomplexan parasites.
Environmental Microbiology. Roč. 20, č. 8 (2018), s. 2824-2833. ISSN 1462-2912. E-ISSN 1462-2920
Grant ostatní: Marie Curie Outgoing Fellowship grant (FP7-PEOPLE-2012-IOF)(ES) 331450 CAARL
Institucionální podpora: RVO:60077344
Klíčová slova: COMPLEX AMVRAKIKOS GULF * BACTERIAL COMMUNITIES * CHROMERA-VELIA * MONTASTRAEA-ANNULARIS * ARCTIC-OCEAN * REEF CORALS * LIFE-CYCLE * IONIAN SEA * BALTIC SEA
Obor OECD: Biochemistry and molecular biology
Impakt faktor: 5.147, rok: 2018

The closest relatives of apicomplexans include photosynthetic chromerid algae (e.g., Chromera and Vitrella), non-photosynthetic colpodellid predators (e.g., Colpodella) and several environmental clades collectively called Apicomplexan-Related Lineages (ARLs). Here we investigate the global distribution and inferred ecology of the ARLs by expansively searching for apicomplexan-related plastid small ribosomal subunit (SSU) genes in large-scale high-throughput bacterial amplicon surveys. Searching more than 220 million sequences from 224 geographical sites worldwide revealed 94 324 ARL plastid SSU sequences. Meta-analyses confirm that all ARLs are coral reef associated and not to marine environments generally, but only a subset is actually associated with coral itself. Most unexpectedly, Chromera was found exclusively in coral biogenous sediments, and not within coral tissue, indicating that it is not a coral symbiont, as typically thought. In contrast, ARL-V is the most diverse, geographically widespread and abundant of all ARL clades and is strictly associated with coral tissue and mucus. ARL-V was found in 19 coral species in reefs, including azooxanthellate corals at depths greater than 500 m. We suggest this is indicative of a parasitic or commensal relationship, and not of photosynthetic symbiosis, further underscoring the importance of isolating ARL-V and determining its relationship with the coral host.
Trvalý link: http://hdl.handle.net/11104/0291025