skip to main content


Title: Atractiella rhizophila , sp. nov., an endorrhizal fungus isolated from the Populus root microbiome

We discovered a new endorrhizal fungal species belonging to the rust lineage Pucciniomycotina among fungi isolated from healthy root mycobiomes of Populus and described here as Atractiella rhizophila. Here, 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 geographic 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 show that A. rhizophila is nonpathogenic, asymptomatically colonizes plant roots, and appears to foster plant growth and elevated photosynthesis rates.
 [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [4] ;  [5] ;  [6] ;  [2]
  1. Michigan State Univ., East Lansing, MI (United States). Dept. of Plant Soil and Microbial Sciences
  2. Duke Univ., Durham, NC (United States). Biology Dept.
  3. Ministry for Primary Industries, Auckland (New Zealand). Dept. of Plant Pathology
  4. Univ. of Florida, Gainesville, FL (United States). Botany and Plant Pathology
  5. Purdue Univ., West Lafayette, IN (United States). Botany and Plant Pathology
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmental Science Division
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Additional Journal Information:
Journal Volume: 109; Journal Issue: 1; Journal ID: ISSN 0027-5514
Taylor & Francis
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
59 BASIC BIOLOGICAL SCIENCES; 60 APPLIED LIFE SCIENCES; Basidiomycete; plant microbiome; root endophyte; sterile mycelium
OSTI Identifier: