Characterization of a novel, ubiquitous fungal endophyte from the rhizosphere and root endosphere of Populus trees Public
Jessica M. Vélez,Timothy J. Tschaplinski,Rytas Vilgalys,Christopher W. Schadt,Gregory Bonito,Khalid Hameed,Nancy Engle,Cyd E. Hamilton
2017 April 11 Fungal Ecology 27 Part A: 78-86
We examined variation in growth rate, patterns of nitrogen utilization, and competitive interactions of Atractiella rhizophila isolates from the roots of Populus hosts. Atractiella
grew significantly faster on media substituted with inorganic nitrogen
sources and slower in the presence of another fungal genus. To determine
plausible causal mechanisms we used metabolomics to explore competitive
interactions between Atractiella strains and Fusarium oxysporum or Leptosphaerulina chartarum. Metabolomic screening of potential microbial inhibitors showed increased levels of glycosides produced in vitro by Atractiella when grown with a different fungal genus, relative to when grown alone. Cumulatively, these results suggest Atractiella
is a poor competitor with other fungi via direct routes e.g. faster
growth rates, but may utilize chemical interactions and possibly
nitrogen sources to defend itself, and niche partition its way to
abundance in the plant host root and rhizosphere.
Vélez, J. M., T. J. Tschaplinski, R. Vilgalys, C. W. Schadt, G. Bonito, K. Hameed, N. Engle and C. E. Hamilton (2017). "Characterization of a novel, ubiquitous fungal endophyte from the rhizosphere and root endosphere of Populus trees." Fungal Ecology 27, Part A: 78-86.