AI Article Synopsis
- A native fungal pathogen in western North America causes black stain root disease (BSRD) in conifers, with three specialized varieties affecting different host trees.
- DNA-based analyses were conducted to assess genetic relationships among these varieties, revealing strong evidence for their separation at the species level.
- The study emphasizes the ecological differences and evolutionary relationships of these pathogens, aiding in the management of black stain root disease.
Article Abstract
is a native fungal pathogen in western North America that causes black stain root disease (BSRD) of conifers. Three host-specialized varieties of this pathogen were previously described: var. on pinyon pines ( and . ); var. , primarily on hard pines (e.g., . , . ); and var. on Douglas-fir (). Morphological, physiological, and ecological differences among the three pathogen varieties have been previously determined; however, DNA-based characterization and analyses are needed to determine the genetic relationships among these varieties. The objective of this study was to use DNA sequences of 10 gene regions to assess phylogenetic relationships among isolates collected from different hosts. The multigene phylogenetic analyses, based on maximum likelihood and Bayesian inference, strongly supported species-level separation of the three varieties. These results, in conjunction with previously established phenotypic differences, support the elevation of var. and var. to the species level as . comb. nov. and . comb. nov., respectively, while maintaining var. as . Characterization of the three species, each with distinct host ranges, provides a baseline to further understand the ecological interactions and evolutionary relationships of these forest pathogens, which informs management of black stain root disease.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10777841 | PMC |
| http://dx.doi.org/10.3389/fpls.2023.1286157 | DOI Listing |
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