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Coleochaete as a model system for plant morphogenesis

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This genus of green algae shows some of the earliest and simplest features of multicellular plant growth. Haploid zoospores initiate the growth of discoid multicellular colonies. The colonies adhere to the substrate and grow as a cell monolayer. The circular morphology of the colonies is maintained by precisely coordinated sequences of anticlinal and periclinal divisions. Cultures are easy to maintain, and are ideal for microscopy. Coleochaete has been little studied as a developmental system, and we are transferring some of the molecular genetic and imaging tools that we have developed for Arabidopsis studies to Coleochaete.