Results 51 to 60 of about 497 (146)

Physiological responses to known intake of ergot alkaloids by steers at environmental temperatures within or greater than their thermoneutral zone

Frontiers in Chemistry, 2014
Two studies separated effects of dietary ergot alkaloids from effects of feed intake or ambient temperature on respiration rate (RR), heart rate (HR), surface temperature (ST), rectal temperature (RT), blood pressure (BP), serum hormone, and plasma ...
Joan eEisemann, Gerald eHuntington, Megan eWilliamson, Michelle eHanna, Matthew ePoore   +4 more
doaj   +1 more source

A Fungal Endophyte Alters Poplar Leaf Chemistry, Deters Insect Feeding and Shapes Insect Community Assembly

Ecology Letters, Volume 28, Issue 2, February 2025.
It is already known that endophytic fungi can influence plant defence against natural enemies such as herbivorous insects. However, our understanding of the underlying mechanisms is still limited. We investigated the influence of an endophytic fungus on the metabolome of poplars and the consequences for the preference and performance of herbivorous ...
Christin Walther, Marine Vallet, Michael Reichelt, Prajakta Giri, Beate Rothe, Elina J. Negwer, Pamela Medina van Berkum, Jonathan Gershenzon, Sybille B. Unsicker   +8 more
wiley   +1 more source

Lolitrem B and Indole Diterpene Alkaloids Produced by Endophytic Fungi of the Genus Epichloë and Their Toxic Effects in Livestock

Toxins, 2016
Different group of alkaloids are produced during the symbiotic development of fungal endophytes of the genus Epichloë in grass. The structure and toxicity of the compounds vary considerably in mammalian herbivores and in crop pests.
Guerre Philippe
doaj   +1 more source

Phosphorus fertiliser is associated with reduced grass grub (Costelytra giveni) fitness in Epichloë endophyte‐infected meadow fescue and perennial ryegrass

Pest Management Science, Volume 80, Issue 12, Page 6409-6423, December 2024.
Grass grub (Costelytra giveni) is a major agricultural pasture pest. This study demonstrated a decline in grass grub survival as soil Olsen P levels increased. Epichloë endophytes, such as the MaxR strain, provide protection under different phosphorus fertiliser regimes.
Katrin G. Hewitt, Rainer W. Hofmann, Olivier J. Ball, Dongwen Luo, Sarah C. Finch, Racheal H. Bryant, Alison J. Popay   +6 more
wiley   +1 more source

Ruminal motility, reticuloruminal fill, and eating patterns in steers exposed to ergovaline

Journal of Animal Science, 2019
Abstract Fescue toxicosis is problematic for growing steers, causing lower DMI and productivity when fed endophyte-infected (E+) tall fescue. A complete understanding of underlying mechanisms of how fescue toxicosis affects growing steers is lacking.
Gyuchul, Ahn, Kara, Ricconi, Suelen, Avila, James L, Klotz, David L, Harmon   +4 more
openaire   +3 more sources

Epichloë fungal endophytes – a vital component for perennial ryegrass survival in New Zealand

New Zealand Journal of Agricultural Research, Volume 67, Issue 4, Page 451-468, August 2024.
ABSTRACT Pastoral agriculture underpins the New Zealand economy. Its success in generating export income is due to a mild and moist temperate climate, productive soils, innovative farmers supported by an effective research and development system, and an energy efficient production system based on year‐round grazing.
John R. Caradus
wiley   +1 more source

The growth promotion in endophyte symbiotic plants does not penalise the resistance to herbivores and bacterial microbiota

Plant, Cell &Environment, Volume 47, Issue 8, Page 2865-2878, August 2024.
Abstract A trade‐off between growth and defence against biotic stresses is common in plants. Fungal endophytes of the genus Epichloë may relieve this trade‐off in their host grasses since they can simultaneously induce plant growth and produce antiherbivore alkaloids that circumvent the need for host defence. The Epichloë ability to decouple the growth‐
Wei Zhang, Pedro E. Gundel, Ruy Jáuregui, Stuart D. Card, Wade J. Mace, Richard D. Johnson, Daniel A. Bastías   +6 more
wiley   +1 more source

Physiological Effects of Ergot Alkaloid and Indole-Diterpene Consumption on Sheep under Hot and Thermoneutral Ambient Temperature Conditions

Animals, 2016
A controlled feeding study was undertaken to determine the physiological and production effects of consuming perennial ryegrass alkaloids (fed via seed) under extreme heat in sheep. Twenty-four Merino ewe weaners (6 months; initial BW 30.8 ± 1.0 kg) were
Michelle L. E. Henry, Stuart Kemp, Frank R. Dunshea, Brian J. Leury   +3 more
doaj   +1 more source

Serotonin receptor‐mediated vasorelaxation occurs primarily through 5‐HT4 activation in bovine lateral saphenous vein

Physiological Reports, Volume 12, Issue 13, July 2024.
Abstract To better understand mechanisms of serotonin‐ (5‐HT) mediated vasorelaxation, isolated lateral saphenous veins from cattle were assessed for vasoactivity using myography in response to increasing concentrations of 5‐HT or selective 5‐HT receptor agonists.
Ronald J. Trotta, David L. Harmon, James L. Klotz   +2 more
wiley   +1 more source

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, Roger C. Bridgman, Forrest T. Smith, Venkatram R. Atigadda   +3 more
openaire   +1 more source