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* Corresponding author 1 School of Biosciences 2 LBI2M - Laboratoire de Biologie Intégrative des Modèles Marins

Abstract : Living organisms are unicellular, composed of a single cell, or multicellular, where a group of up to ~1012 cells functions co-operatively Kaiser, 2001. All multicellular organisms evolved from single-celled ancestors; every individual organism arises from a unicell and reproduces by forming unicells. Multicellularity enables competitive advantages, and may have shaped our oxygen-rich atmosphere Grosberg and Strathmann, 1998; Kaiser, 2001; Schirrmeister et al., 2013. Multicellularity has evolved multiple times: animals, plants, algae, amoebae, fungi, and bacteria are or can all be multicellular King, 2004; Grosberg and Strathmann, 2007; Rokas, 2008; Claessen et al., 2014. Multicellularity can be clonal arising from division of a single cell or aggregative aggregation of genetically diverse cells, with clonal multicellularity considered evolutionarily more stable Grosberg and Strathmann, 1998. The molecular mechanisms by which organisms become multicellular are not well understood. In this article, we outline eukaryotic multicellular evolution, and discuss how to increase our future understanding.

Keywords : multicellularity transitions life-cycles toolkit macroalgae plants





Autor: Juliet C. Coates - Umm-E Aiman - Bénédicte Charrier -

Fuente: https://hal.archives-ouvertes.fr/



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