RECORD

Sydowia polyspora is both a Foliar Endophyte and a Preemergent Seed Pathogen in Pinus ponderosa

Title:
Sydowia polyspora is both a Foliar Endophyte and a Preemergent Seed Pathogen in Pinus ponderosa
Creator:
Ridout, Mary; Newcombe, George
Date Created:
2018-01-18
Description:
Poor seedling performance and reduced seed emergence are often ascribed to known pathogens that cause low seedling recruitment and poor seed emergence in forest nurseries and regeneration plantings. On the other hand, foliar endophytes are often overlooked as a source of poor emergence or tree seedling disease. Here, we show that an endophytic fungus common to the foliar microbiome of Pinus ponderosa acts as a cryptic pathogen in delaying emergence. In a series of experiments, we inoculated seed of P. ponderosa with a suspension of Sydowia polyspora 12 h prior to sowing. S. polyspora reduced seed emergence of its host, P. ponderosa, by as much as 30%. A tetrazolium chloride viability assay showed that S. polyspora reduces emergence by preventing germination; seed remained viable. In sum, pathogens affecting tree seed emergence and seedling recruitment may be endophytic as well as in seed and soil and deserve greater attention in studies of natural regeneration.
Document Type:
Research Article
Subjects:
UIEF foliar microbes seedling performance seedling survival foliar endophytes endophytic fungus forest pathology
Location:
UIEF
Latitude:
46.869607
Longitude:
-116.733856
Publisher:
American Phytopathological Society
Department:
Forest, Rangeland, and Fire Sciences
Type:
Text

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Preferred Citation:
"Sydowia polyspora is both a Foliar Endophyte and a Preemergent Seed Pathogen in Pinus ponderosa ", UIEF Research Exchange, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/uief/items/uief_0219.html
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