Multicellularity in a Heterocyst-Forming Cyanobacterium: Pathways for Intercellular Communication

Conference paper
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 675)


The filamentous, heterocyst-forming cyanobacteria are among the simplest multicellular prokaryotes, and Anabaena sp. strain PCC 7120 is being used as a model for studying multicellularity in these organisms. In the absence of combined nitrogen two interdependent cell types are present in an Anabaena filament: vegetative cells and heterocysts. Vegetative cells perform oxygenic photosynthesis and supply carbon compounds to the heterocysts, which are specialized in the assimilation of atmospheric N2 and supply nitrogenous compounds to the vegetative cells. In this chapter, we discuss two possible pathways for the exchange of metabolites and regulatory signals between vegetative cells and heterocysts: the continuous periplasm that surrounds the cells in the filament and some septal proteinaceous complexes that could allow the direct intercellular transfer of small molecules.


Green Fluorescent Protein Cytoplasmic Membrane Fluorescence Recovery After Photobleaching Green Fluorescent Protein Fluorescence Filamentous Cyanobacterium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We thank Antonia Herrero for a critical reading of the manuscript. Work on this project was made possible by grant no. BFU2008-03811 from Ministerio de Ciencia e Innovación and Proyecto de Excelencia CVI1896 from Junta de Andalucía (Spain).


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© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Instituto de Bioquímica Vegetal y FotosíntesisC.S.I.C. and Universidad de SevillaSevilleSpain

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