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Seagrass genomes reveal ancient polyploidy and adaptations to the marine environment
Ma, X.; Vanneste, S.; Chang, J.; Ambrosino, L.; Barry, K.; Bayer, T.; Bobrov, A.A.; Boston, L.; Campbell, J.E.; Chen, H.; Chiusano, M.L.; Dattolo, E.; Grimwood, J.; He, G.F.; Jenkins, J.; Khachaturyan, M.; Marin-Guirao, L.; Mesterhazy, A.; Muhd, D.D.; Pazzaglia, J.; Plott, C.; Rajasekar, S.; Rombauts, S.; Ruocco, M.; Scott, A.; Tan, M.P.; Van de Velde, J.; Vanholme, B.; Webber, J.; Wong, L.L.; Yan, M.; Sung, Y.Y.; Novikova, P.; Schmutz, J.; Reusch, T.B.H.; Procaccini, G.; Olsen, J.L.; Van de Peer, Y. (2024). Seagrass genomes reveal ancient polyploidy and adaptations to the marine environment. Nature Plants 10(2): 240-255. https://dx.doi.org/10.1038/s41477-023-01608-5
In: Nature Plants. Nature Publishing Group: London. ISSN 2055-026X; e-ISSN 2055-0278
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  • Ma, X.
  • Vanneste, S.
  • Chang, J.
  • Ambrosino, L.
  • Barry, K.
  • Bayer, T.
  • Bobrov, A.A.
  • Boston, L.
  • Campbell, J.E.
  • Chen, H.
  • Chiusano, M.L.
  • Dattolo, E.
  • Grimwood, J.
  • He, G.F.
  • Jenkins, J.
  • Khachaturyan, M.
  • Marin-Guirao, L.
  • Mesterhazy, A.
  • Muhd, D.D.
  • Pazzaglia, J.
  • Plott, C.
  • Rajasekar, S.
  • Rombauts, S.
  • Ruocco, M.
  • Scott, A.
  • Tan, M.P.
  • Van de Velde, J.
  • Vanholme, B.
  • Webber, J.
  • Wong, L.L.
  • Yan, M.
  • Sung, Y.Y.
  • Novikova, P.
  • Schmutz, J.
  • Reusch, T.B.H.
  • Procaccini, G.
  • Olsen, J.L.
  • Van de Peer, Y.
Abstract
    We present chromosome-level genome assemblies from representative species of three independently evolved seagrass lineages: Posidonia oceanica, Cymodocea nodosa, Thalassia testudinum and Zostera marina. We also include a draft genome of Potamogeton acutifolius, belonging to a freshwater sister lineage to Zosteraceae. All seagrass species share an ancient whole-genome triplication, while additional whole-genome duplications were uncovered for C. nodosa, Z. marina and P. acutifolius. Comparative analysis of selected gene families suggests that the transition from submerged-freshwater to submerged-marine environments mainly involved fine-tuning of multiple processes (such as osmoregulation, salinity, light capture, carbon acquisition and temperature) that all had to happen in parallel, probably explaining why adaptation to a marine lifestyle has been exceedingly rare. Major gene losses related to stomata, volatiles, defence and lignification are probably a consequence of the return to the sea rather than the cause of it. These new genomes will accelerate functional studies and solutions, as continuing losses of the ‘savannahs of the sea’ are of major concern in times of climate change and loss of biodiversity.
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