Results 21 to 30 of about 529 (159)
Tall fescue seed extraction and partial purification of ergot alkaloids
Frontiers in Chemistry, 2014 Many substances in the tall fescue/endophyte association (Schedonorus arundinaceus/Epichloë coenophiala) have biological activity. Of these compounds only the ergot alkaloids are known to have significant mammalian toxicity and the predominant ergot ...
Lowell eBush
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Ergot alkaloids in New Zealand pastures and their impact
New Zealand Journal of Agricultural Research, Volume 65, Issue 1, Page 1-41, February 2022., 2022 ABSTRACT In identifying endophytes for use in pastures in New Zealand there have been two strategies used, either exclusion of ergopeptine and lolitrem alkaloids or, retaining some ergopeptine expression to enhance the stability of natural defences against invertebrate pests. Both have their strengths and weaknesses.
John R. Caradus +6 more
wiley +1 more source
Animal, 2014 Ergot alkaloids in endophyte-infected (Neotyphodium coenophialum) tall fescue (Lolium arundinaceum) have been shown to cause a reduction in blood flow to the rumen epithelium as well as a decrease in volatile fatty acids (VFA) absorption from the washed ...
A.P. Foote +6 more
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Ergovaline, an endophytic alkaloid. 1. Animal physiology and metabolism [PDF]
Animal Production Science, 2016 Ergovaline is an ergot alkaloid found in some endophyte-infected ryegrasses and it has been implicated in the expression of ergotism-like symptoms of grazing livestock, as well as in the protection of the plant against invertebrate predation and abiotic stresses. These selection pressures have resulted in a conflict between the needs of the pasture for
J. L. Klotz, A. M. Nicol
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Animals, 2022 Ergot alkaloids produced by a fungal endophyte that infects tall fescue (Lolium arundinaceum; (E+ TF) can induce constriction of the vasculature in ruminants, resulting in “fescue toxicosis”.
Brittany E. Harlow +4 more
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Frontiers in Ecology and Evolution, 2018 Host organisms can acquire new functional traits through symbiosis. Seed-transmitted Epichloë fungal endophytes are known to protect host plants against herbivores and increase tolerance to abiotic stresses by alkaloids and antioxidants, respectively ...
Pedro E. Gundel +9 more
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Determination of ergovaline in tall fescue by a specific monoclonal antibody [PDF]
Food and Agricultural Immunology, 1998 A monoclonal antibody (EV5B3) was developed using a conjugate of ergovaline and bovine serum albumin linked at the indole N(1) of the ergovaline molecule. This resulted in an antibody specific for the distal cyclol peptide moiety of ergovaline. As a result the antibody was specific for ergot peptide alkaloids having an isopropyl group at the C(5 ...
Richard A. Shelby +3 more
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Animal, 2015 Two experiments were conducted to assess preference by sheep for endophyte-infected tall fescue growing in monoculture at least 5 m away from alfalfa (fescue-middle (FM)) over endophyte-infected tall fescue growing adjacent (0.2 to 1 m; fescue–alfalfa ...
M.A. Friend +2 more
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Feeding Tall Fescue Seed Reduces Ewe Milk Production, Lamb Birth Weight and Pre-Weaning Growth Rate
Animals, 2020 Endophyte-infected tall fescue (E+) produces ergovaline and ergovalinine, which are mycotoxins that act as dopamine agonists to suppress prolactin and induce vasoconstriction.
Jessica L. Britt +8 more
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Toxins, 2021 In the past centuries consumption of bread made of ergot-infected flour resulted in mass poisonings and miscarriages. The reason was the sclerotia of Claviceps purpurea (Fr.) Tul.—a source of noxious ergot alkaloids (ergotamine and ergovaline).
Aleksander Smakosz +3 more
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