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 ...
Over the last 20 years, Lake Erie has been heaving up ever-larger blooms of cyanobacteria that are so toxic they shut down Toledo, Ohio’s drinking water system in 2014. Scientists say that a warming ...
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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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