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The first isolation and characterisation of the protist Labyrinthula sp. in Southeastern Australia

Version 2 2024-06-04, 07:23
Version 1 2017-09-28, 16:29
journal contribution
posted on 2024-06-04, 07:23 authored by BK Sullivan, KL Robinson, Stacey Trevathan-TackettStacey Trevathan-Tackett, ES Lilje, FH Gleason, O Lilje
As a result of anthropogenic influences and global climate change, emerging infectious marine diseases are thought to be increasingly more common and more severe than in the past. The aim of our investigation was to confirm the presence of Labyrinthula, the aetiological agent of the seagrass wasting disease, in Southeastern Australia and provide the first isolation and characterisation of this protist, in Australia. Colonies and individual cells were positively identified as Labyrinthula using published descriptions, diagrams, and photographs. Their identity was then confirmed using DNA barcoding of a region of the 18S rRNA gene. Species level identification of isolates was not possible as the taxonomy of the Labyrinthula is still poorly resolved. Still, a diversity of Labyrinthula was isolated from small sections of the southeast coast of Australia. The isolates were grouped into three haplotypes that are biogeographically restricted. These haplotypes are closely related to previously identified saprotrophic clades. The study highlights the need for further investigation into the global distribution of Labyrinthula, including phylogenetic pathogenicity and analysis of host-parasite interactions in response to stressors. Given the results of our analyses, it is prudent to continue research into disease and epidemic agents to better prepare researchers for potential future outbreaks.

History

Journal

Journal of Eukaryotic Microbiology

Volume

64

Pagination

504-513

Location

Hoboken, N.J.

ISSN

1066-5234

eISSN

1550-7408

Language

eng

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2016, The Authors

Issue

4

Publisher

Wiley-Blackwell Publishing