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- Publications
- Influence
Glucosinolate composition of seeds from 297 species of wild plants
- M. E. Daxenbichler, G. F. Spencer, Diana G. Carlson, G. B. Rose, Anita M. Brinker, R. G. Powell
- Biology
- 1991
Abstract Seed samples from 22 species of the Capparidaceae (eight genera), one Caricaceae, 259 Cruciferae (88 genera), two Moringaceae, three Phytolaccaceae, one Pittosporaceae, six Resedaceae, one… Expand
Modification and evaluation of the potato disc assay and antitumor screening of euphorbiaceae seeds.
- N. Ferrigni, J. Putnam, +6 authors C. R. Smith
- Biology, Medicine
- Journal of natural products
- 1 November 1982
Galsky et al. (10, 11) have reported that the inhibition and growth of crown gall tumors, initiated on potato discs by Agrobacterium tumefaciens, apparently has good agreement with 3PS in vivo… Expand
Analysis of ergopeptine alkaloids in endophyte-infected tall fescue
- S. G. Yates, R. G. Powell
- Biology
- 1 March 1988
Naturally-Occurring and Synthetic Loline Alkaloid Derivatives: Insect Feeding Behavior Modification and Toxicity2
- W. Riedell, R. Kieckhefer, R. J. Petroski, R. G. Powell
- Biology
- 1991
Methanol extracts of tall fescue plants (Festuca arundinacea Schreb.) infected with an endophytic fungus (Acremonium coenophialum Morgan-Jones and Gams) contain loline alkaloids which deter feeding… Expand
Analyses of selected endophyte-infected grasses for the presence of loline-type and ergot-type alkaloids
- M. TePaske, R. G. Powell, S. Clement
- Biology
- 1 December 1993
Selected endophyte-free and endophyte-infected grasses from the genera Festuca, Lolium, Hordeum, Stipa, and Poa were analyzed for the presence of loline- and ergot-type alkaloids. Loline alkaloids… Expand
In vitro and in vivo ruminal and physiological responses to endophyte-infected tall fescue.
- M. L. Westendorf, G. E. Mitchell, R. Tucker, L. Bush, R. J. Petroski, R. G. Powell
- Biology, Medicine
- Journal of dairy science
- 1 February 1993
Relationships between alkaloid compounds in endophyte-infected tall fescue and ruminal metabolism were studied in two experiments. In the first experiment, different combinations of the pyrrolizidine… Expand
Alkaloid toxins in endophyte-infected grasses.
- R. G. Powell, R. J. Petroski
- Biology, Medicine
- Natural toxins
- 1 May 1993
Grasses infected with clavicipitaceous fungi have been associated with a variety of diseases including classical ergotism in humans and animals, fescue foot and summer syndrome in cattle, and… Expand
Alkaloids of Stipa robusta (sleepygrass) infected with an Acremonium endophyte.
- R. J. Petroski, R. G. Powell, K. Clay
- Biology, Medicine
- Natural toxins
- 1 March 1992
Stipa robusta (= Stipa vaseyi) is a perennial grass found in certain areas of the southwestern United States. It is commonly known as sleepygrass, as horses that ingest this grass may become… Expand
Isolation, semi-synthesis, and NMR spectral studies of loline alkaloids
- R. J. Petroski, S. G. Yates, D. Weisleder, R. G. Powell
- Biology
- 1 July 1989
Loline, a saturated pyrrolizidine-type alkaloid, was isolated from tall fescue (Festuca arundinacea) seed infected with the endophytic fungus Acremonium coenophialum. Procedures are described for the… Expand
Limonoid antifeedants from seed of Sandoricum koetjape.
- R. G. Powell, K. Mikolajczak, B. Zilkowski, E. Mantus, D. Cherry, J. Clardy
- Biology, Medicine
- Journal of natural products
- 1991
An extract of the seed of Sandoricum koetjape has yielded two new limonoids, sandoricin [1] and 6-hydroxysandoricin [2]. Both compounds are effective antifeedants when incorporated into artificial… Expand