Cultures of Azolla caroliniana Willd. free of the symbiotic blue-green alga, Anabaena azollae, were obtained by treatment of Azolla fronds with a regimen of antibiotics. These symbiont-free plants can ...
KNOWLEDGE of the nature of the heterocysts of blue-green algae has been limited by the lack of suitable techniques for investigation of the physiology and biochemistry of these puzzling structures.
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