Spores of the mycorrhizal fungus <Emphasis Type="Italic">Glomus mosseae</Emphasis> host yeasts that solubilize phosphate and accumulate polyphosphates |
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| Authors: | Loreli Mirabal Alonso Diethelm Kleiner Eduardo Ortega |
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| Institution: | (1) National Institute of Agricultural Sciences (INCA), Havana, Cuba;(2) University of Bayreuth, Bayreuth, Germany;(3) Plant Physiology Laboratory, Plant Biology Department,Biology Faculty, University of Havana, Havana, Cuba |
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| Abstract: | The present paper reports the presence of bacteria and yeasts tightly associated with spores of an isolate of Glomus mosseae. Healthy spores were surface disinfected by combining chloramine-T 5%, Tween-40, and cephalexin 2.5 g L−1 (CTCf). Macerates of these spores were incubated on agar media, microorganisms were isolated, and two yeasts were characterized
(EndoGm1, EndoGm11). Both yeasts were able to solubilize low-soluble P sources (Ca and Fe phosphates) and accumulate polyphosphates
(polyPs). Sequence analysis of 18S ribosomal deoxyribonucleic acid showed that the yeasts belong to the genera Rhodotorula or Rhodosporidium (EndoGm1) and Cryptococcus (EndoGm11). Results from inoculation experiments showed an effect of the spore-associated yeasts on the root growth of rice,
suggesting potential tripartite interactions with mycorrhizal fungi and plants. |
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| Keywords: | Mycorrhizal fungi Associated yeast Spore disinfection Glomus mosseae Phosphate solubilization |
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