Results 11 to 20 of about 497 (146)

Ergovaline Stability in Tall Fescue Based on Sample Handling and Storage Methods [PDF]

Frontiers in Chemistry, 2014
Ergovaline is an ergot alkaloid produced by the endophyte Neotyphodium coenophialum (Morgan-Jones and Gams) found in tall fescue (Schedonorus arundinacea (Schreb.) Dumort.) and blamed for a multitude of livestock disorders.
Krista La Moen Lea, Lori eSmith, Cynthia eGaskill, Robert eColeman, S. Ray Smith   +4 more
doaj   +3 more sources

Duration of ergovaline exposure influences serotonin-mediated vasoactivity of bovine mesenteric vasculature. [PDF]

J Anim Sci, 2023
Abstract Ergovaline (ERV), produced in toxic endophyte-infected tall fescue, causes potent vasoconstriction of bovine peripheral and visceral vasculature. Ergovaline acts as both an agonist and an antagonist in bovine gut blood vessels through serotonin (5-HT) receptors and it appears that the type of action could be influenced by the ...
Trotta RJ, Harmon DL, Ji H, Klotz JL.
europepmc   +3 more sources

Toxicokinetics of ergovaline in the horse after an intravenous administration [PDF]

Veterinary Research, 2001
The toxicokinetics of ergovaline (an ergopeptine mycotoxin present in some grasses infected with endophytic fungus of the genus Neotyphodium) were studied after intravenous administration of a single dose of 15 microg/kg bwt in four gelding horses. Plasma ergovaline concentrations were measured by high performance liquid chromatography, and the kinetic
Bony, Sylvie, Durix, Andrée, Leblond, Agnès, Jaussaud, Philippe   +3 more
openaire   +5 more sources

A Complex Ergovaline Gene Cluster in Epichloë Endophytes of Grasses [PDF]

Applied and Environmental Microbiology, 2007
ABSTRACT Clavicipitaceous fungal endophytes of the genera Epichloë and Neotyphodium form symbioses with grasses of the subfamily Pooideae, in which they can synthesize an array of bioprotective alkaloids. Some strains produce the ergopeptine alkaloid ergovaline, which is implicated
Damien J, Fleetwood, Barry, Scott, Geoffrey A, Lane, Aiko, Tanaka, Richard D, Johnson   +4 more
openaire   +2 more sources

Silicon and Epichloë‐endophyte defences in a model temperate grass diminish feeding efficiency and immunity of an insect folivore

Functional Ecology, Volume 37, Issue 12, Page 3177-3192, December 2023., 2023
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plants deploy diverse anti‐herbivore defences which reduce feeding and performance of herbivores. Temperate grasses use silicon (Si) accumulation and Epichloë‐endophytes for physical and chemical (i.e. endophytic‐alkaloids) defence against insect herbivores.
X. Cibils‐Stewart, R. Putra, T. Islam, D. J. Fanna, R. Wuhrer, W. J. Mace, S. E. Hartley, A. J. Popay, S. N. Johnson   +8 more
wiley   +1 more source

Pastoral agriculture, a significant driver of New Zealand's economy, based on an introduced grassland ecology and technological advances

Journal of the Royal Society of New Zealand, Volume 53, Issue 3, Page 259-303, June 2023., 2023
ABSTRACT The New Zealand economy is export‐driven and heavily reliant on the productivity of the pastoral sector. The transformation of native forest and tussock grassland ecologies to temperate grasslands occurred rapidly with the arrival of Europeans.
John R. Caradus, Stephen L. Goldson, Derrick J. Moot, Jacqueline S. Rowarth, Alan V. Stewart   +4 more
wiley   +1 more source

Elevated atmospheric CO2 suppresses silicon accumulation and exacerbates endophyte reductions in plant phosphorus

Functional Ecology, Volume 37, Issue 6, Page 1567-1579, June 2023., 2023
Read the free Plain Language Summary for this article on the Journal blog. Abstract Many temperate grasses are both hyper‐accumulators of silicon (Si) and hosts of Epichloë fungal endophytes, functional traits which may alleviate environmental stresses such as herbivore attack.
Scott N. Johnson, Craig V. M. Barton, Fikadu N. Biru, Tarikul Islam, Wade J. Mace, Rhiannon C. Rowe, Ximena Cibils–Stewart   +6 more
wiley   +1 more source

Biological control of plant diseases – What has been achieved and what is the direction?

Plant Pathology, Volume 71, Issue 5, Page 1024-1047, June 2022., 2022
Biological control is coming of age and many products are commercially available. This review emphasizes the biology of the three‐way interactions involved and the long route to commercialization. Abstract The global sustainability agenda is increasing the demand for reduction in inputs into agricultural production while maintaining profitable yield of
David B. Collinge, Dan Funck Jensen, Mojgan Rabiey, Sabrina Sarrocco, Michael W. Shaw, Richard H. Shaw   +5 more
wiley   +1 more source

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
openaire   +1 more source

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, Stuart D. Card, Sarah C. Finch, David E. Hume, Linda J. Johnson, Wade J. Mace, Alison J. Popay   +6 more
wiley   +1 more source