RT Journal Article
SR Electronic
T1 Convergent evolution and horizontal gene transfer in Arctic Ocean microalgae
JF Life Science Alliance
JO Life Sci. Alliance
FD Life Science Alliance LLC
SP e202201833
DO 10.26508/lsa.202201833
VO 6
IS 3
A1 Richard G Dorrell
A1 Alan Kuo
A1 Zoltan Füssy
A1 Elisabeth H Richardson
A1 Asaf Salamov
A1 Nikola Zarevski
A1 Nastasia J Freyria
A1 Federico M Ibarbalz
A1 Jerry Jenkins
A1 Juan Jose Pierella Karlusich
A1 Andrei Stecca Steindorff
A1 Robyn E Edgar
A1 Lori Handley
A1 Kathleen Lail
A1 Anna Lipzen
A1 Vincent Lombard
A1 John McFarlane
A1 Charlotte Nef
A1 Anna MG Novák Vanclová
A1 Yi Peng
A1 Chris Plott
A1 Marianne Potvin
A1 Fabio Rocha Jimenez Vieira
A1 Kerrie Barry
A1 Colomban de Vargas
A1 Bernard Henrissat
A1 Eric Pelletier
A1 Jeremy Schmutz
A1 Patrick Wincker
A1 Joel B Dacks
A1 Chris Bowler
A1 Igor V Grigoriev
A1 Connie Lovejoy
YR 2023
UL https://www.life-science-alliance.org/content/6/3/e202201833.abstract
AB Microbial communities in the world ocean are affected strongly by oceanic circulation, creating characteristic marine biomes. The high connectivity of most of the ocean makes it difficult to disentangle selective retention of colonizing genotypes (with traits suited to biome specific conditions) from evolutionary selection, which would act on founder genotypes over time. The Arctic Ocean is exceptional with limited exchange with other oceans and ice covered since the last ice age. To test whether Arctic microalgal lineages evolved apart from algae in the global ocean, we sequenced four lineages of microalgae isolated from Arctic waters and sea ice. Here we show convergent evolution and highlight geographically limited HGT as an ecological adaptive force in the form of PFAM complements and horizontal acquisition of key adaptive genes. Notably, ice-binding proteins were acquired and horizontally transferred among Arctic strains. A comparison with Tara Oceans metagenomes and metatranscriptomes confirmed mostly Arctic distributions of these IBPs. The phylogeny of Arctic-specific genes indicated that these events were independent of bacterial-sourced HGTs in Antarctic Southern Ocean microalgae.