Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (2.0 MB bytes)

Title: Seed isolates of Alternaria and Aspergillus fungi increase germination of Astragalus utahensis

Author: Eldredge, Sean D.; Geary, Brad; Jensen, Scott L.;

Date: 2016

Source: Native Plants Journal. 17(2): 89-94.

Publication Series: Scientific Journal (JRNL)


Astragalus utahensis (Torr.) Torr. & A. Gray (Fabaceae) (Utah milkvetch) is native lo the arid Great Basin and has desirable attributes that make it a good candidate for restoration in arid, noncompetitive situations. Seed dormancy is a significant barrier to consistent establishment for this species. Species of Alternaria and Aspergillus fungi have potential to enhance germination of A. utahensis seed; therefore, we conducted trials to investigate Alternaria and Aspergillus effects on germination and emergence under controlled in vitro conditions or in soil in a growth chamber, in a greenhouse, and in the field . Seed was either acid scarified or left untreated and then inoculated with spores from Alternaria and Aspergillus. Under in vitro and greenhouse conditions, rates of germination or emergence increased significantly for seed inoculated with the 2 fungi. Inoculated seed in field experiments planted at Fountain Green and Nephi, Utah, had significantly higher emergence rates than the non-scarified/non-inoculated control, and Aspergillus-inoculated seed outperformed seed treated with Alternaria. Inoculation of seed planted at Spanish Fork did not provide an advantage over acid scarification, but all treatments showed greater emergence than the non-scarified/non-inoculated control. This study demonstrates that inoculating A. utahensis seed with Alternaria or Aspergillus prior to planting has a positive impact on rates of emergence in a field setting.

Keywords: fungal-seed interactions, seed germination, Fabaceae

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.



Eldredge, Sean D.; Geary, Brad; Jensen, Scott L. 2016. Seed isolates of Alternaria and Aspergillus fungi increase germination of Astragalus utahensis. Native Plants Journal. 17(2): 89-94.


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.