Nitrogen (N) available to plants mostly originates from N₂ fixation carried out by prokaryotes. Certain cyanobacterial species contribute to this energetically expensive process related to carbon (C) ...
This is a preview. Log in through your library . Abstract A study has been made of the cytology of the heterocysts of Anabaena cylindrica Lemm. at different stages during the growth of this alga in ...
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This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...
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