Abstract
Plant-Fungal Ecology Despite being unrelated, free-living algae and fungi can learn to help one another out. Hom and Murray raised the green alga Chlamydomonas reinhardtii in CO2-restricted environments in the presence of the yeast Saccharomyces cerevisiae (see the Perspective by Aanen and Bisseling). The experimental setup forced the two species to depend on one another for the metabolic production of CO2, which is provided by the yeast as it consumes glucose and is needed by the alga, and ammonia, which conversely can be made from nitrite by the alga and then used by the yeast. This dependence was seen under a broad range of environmental conditions. Similar tests between other Chlamydomonas and fungal species revealed the ability to create a phylogenetically broad range of mutualisms. Science , this issue p. [94][1]; see also p. [29][2] [1]: /lookup/doi/10.1126/science.1253320 [2]: /lookup/doi/10.1126/science.1256542
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