D
Daniel Grum
Researcher at United States Department of Agriculture
Publications - 11
Citations - 325
Daniel Grum is an academic researcher from United States Department of Agriculture. The author has contributed to research in topics: Oxytropis & Swainsonine. The author has an hindex of 8, co-authored 10 publications receiving 283 citations. Previous affiliations of Daniel Grum include Agricultural Research Service.
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Journal ArticleDOI
Production of the alkaloid swainsonine by a fungal endosymbiont of the Ascomycete order Chaetothyriales in the host Ipomoea carnea.
Daniel Cook,Wesley T. Beaulieu,Ivan W. Mott,Franklin Riet-Correa,Dale R. Gardner,Daniel Grum,James A. Pfister,Keith Clay,Clairton Marcolongo-Pereira +8 more
TL;DR: It is demonstrated that I. carnea plants are infected with a fungal endosymbiont that was cultured from its seeds and which produced swainsonine in pure culture but not the calystegines, which are glycosidase inhibitors.
Journal ArticleDOI
Production of the alkaloid swainsonine by a fungal endophyte in the host Swainsona canescens.
Daniel Grum,Daniel Cook,Deana L. Baucom,Ivan W. Mott,Dale R. Gardner,Rebecca Creamer,Jeremy G. Allen +6 more
TL;DR: Swainsona canescens is shown to harbor an endophyte that is closely related to Undifilum species previously cultured from locoweeds of North America and Asia, and was characterized as an UndifILum species using morphological and phylogenetic analyses.
Journal ArticleDOI
Swainsonine and endophyte relationships in Astragalus mollissimus and Astragalus lentiginosus.
Daniel Cook,Dale R. Gardner,Daniel Grum,James A. Pfister,Michael H. Ralphs,Kevin D. Welch,Benedict T. Green +6 more
TL;DR: Findings suggest several possible reasons for differential concentrations of swainsonine that will be tested in future work, including sequence variants of U. oxytropis that exist within populations of A. mollissimus, A. lentiginosus, and Oxytropis and do not correlate with chemotype.
Journal ArticleDOI
Transmission of the locoweed endophyte to the next generation of plants
TL;DR: It appears that U. oxytropis has near perfect vertical transmission to the next generation of seedlings, however, a small proportion of the progeny had low endophyte/low or no swainsonine, and this characteristic was inherited in the nextgeneration.
Journal ArticleDOI
Influence of Phenological Stage on Swainsonine and Endophyte Concentrations in Oxytropis sericea
Daniel Cook,Lei Shi,Dale R. Gardner,James A. Pfister,Daniel Grum,Kevin D. Welch,Michael H. Ralphs +6 more
TL;DR: Locoweeds are defined as Astragalus and Oxytropis species that cause intoxication due to the alkaloid swainsonine and endophyte amounts generally increased over the growing season in above ground parts and remained static in the crowns at all four locations.