Exposé
The private life of coccolithophores
Frada, Miguel J.; Bendif, El Mahdi; Keuter, Sabine; Probert, Ian
Perspectives in Phycology Vol. 6 No. 1-2 (2019), p. 11 - 30
publié: Jul 1, 2019
publication en ligne: Aug 25, 2018
manuscrit accepté: Jul 23, 2018
revision du manuscrit reçu: Jul 23, 2018
révision du manuscrit demandée: Apr 25, 2018
manuscrit reçu: Mar 3, 2018
ArtNo. ESP271000601001, Prix: 24.80 €
Abstract
Coccolithophores are a group of unicellular calcifying algae that are major contributors to phytoplankton communities and ocean biogeochemistry. Coccolithophores display complex sexual haplo-diplontic life cycles comprising diploid and haploid phases that can multiply independently by mitosis and that are markedly distinct in terms of morphology and eco-physiological properties. Here, we summarize current knowledge on the diversity, eco-physiology and evolution of coccolithophore life cycle strategies. We also discuss the mechanisms driving life cycle phase transitions and the limited evidence for sexuality in natural settings. A deeper understanding of the properties, plasticity and controls of coccolithophore life cycles is critical to comprehensively unveil their ecological and biogeochemical impact as well as evolutionary success.
Mots-clefs
coccolithophores • life cycle • haplo-diplontic • heteromorphy • sex