Among fungi isolated from healthy root mycobiomes of Populus, we discovered a new endorrhizal fungal species belonging to the rust lineage Pucciniomycotina, described here as Atractiella rhizophila.
We characterized this species by transmission electron microscopy
(TEM), phylogenetic analysis, and plant bioassay experiments.
Phylogenetic sequence analysis of isolates and available environmental
and reference sequences indicates that this new species, A. rhizophila, has a broad geographical and host range. Atractiella rhizophila
appears to be present in North America, Australia, Asia and Africa, and
is associated with trees, orchids and other agriculturally important
species including soybean, corn and rice. Despite the large geographic
and host range of this species sampling, A. rhizophila appears to
have exceptionally low sequence variation within nuclear rDNA markers
examined. With inoculation studies, we demonstrate that A. rhizophila
is non-pathogenic, asymptomatically colonizes plant roots, and appears
to foster plant-growth and elevated photosynthesis rates.
Bonito, G., K. Hameed, M. Toome-Heller, R. Healy, C. Reid, H.-L. Liao, M. C. Aime, C. Schadt and R. Vilgalys (2017). "Atractiella rhizophila, sp. nov., an endorrhizal fungus isolated from the Populus root microbiome." Mycologia 109(1): 18-26.