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Endophytic Fungi from Marine Macroalgae in Nova Scotia

Caryn Cooper1 and Allison K. Walker2,*

1Department of Botany, University of British Columbia, 170-6371 Crescent Road, Vancouver, BC V6T 1Z2, Canada. 2Department of Biology, Acadia University, 33 Westwood Avenue, Wolfville, NS B4P 2R6, Canada. *Corresponding author.

Northeastern Naturalist, Volume 29, Issue 2 (2022): 295–310

Marine macroalgae are a polyphyletic group of photosynthetic eukaryotes and play critical roles in oxygen production, as primary producers, and in providing physical habitat structure. They harbor diverse microbial communities, including mutualistic, commensalistic, and parasitic fungi. These fungi may be obligately or facultatively marine and symbiotic. In this investigation, we isolated endophytic algicolous fungi from marine macroalgae collected from 5 intertidal sites in Nova Scotia. Fungi were cultured from surface-sterilized algal tissue and identified using ITS rDNA barcoding. From 21 marine macroalgal species collected, 11 algal species harbored endophytic fungi. We identified 23 endophytic algicolous fungi from the Bay of Fundy and Atlantic coasts of Nova Scotia. Marine endophytes are a promising new resource for bioactive compounds.

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