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Resolving the first steps to multicellularity.

Research paper by Joel L JL Sachs

Indexed on: 01 Apr '08Published on: 01 Apr '08Published in: Trends in Ecology & Evolution



Abstract

Multicellular life has evolved many times, yet each origin requires free cells to integrate unselfishly into a higher-level individual. How can such transitions evolve? In a new paper, Herron and Michod investigate the recent origins of multicellularity in colonial algae. Their phylogenetic reconstructions provide a striking dissection of early steps, and altruistic traits are at the crux of it. Key evolutionary reversals are also revealed, where cellular selfishness might have thwarted multicellular integration.