Results 21 to 30 of about 948 (186)

Improved Extraction and HPLC Methods for Ergovaline from Plant Material and Rumen Fluid

Journal of Veterinary Diagnostic Investigation, 1994
Ergovaline, the main ergopeptine alkaloid produced in tall fescue infected with Acremonium coenophialum, is known to cause tall fescue toxicosis. Current methods in use for quantifying ergovaline in plant material have several disadvantages, including large solvent volumes and long analysis time.
A M, Cràig, D, Bilich, J T, Hovermale, R E, Welty   +3 more
openaire   +3 more sources

Occurrence of ergovaline in endophyte infected grasses from mediterranean grasslands. [PDF]

, 2000
We are grateful to J.e. Estévez and M. Hernández for technical assistance. Ergovaline standard sample was generously provided by Dr. Forrest Smith, Auburn University. This work was financed by the Spanish "Comisión Interministerial de Ciencia y Tecnología" (CICYT, project AGF96-0423) and "Junta de Castilla y León" (project CSI3/ 98).
Vázquez de Aldana, Beatriz R., García Criado, Balbino, Zabalgogeazcoa, Iñigo, García Ciudad, Antonia   +3 more
openaire   +1 more source

Variation of the alkaloids ergovaline and peramine in wild populations of endophyte infected Festuca rubra [PDF]

, 2004
Resumen del trabajo presentado en la 20th General Meeting of the European Grassland Federation, celebrada en Luzern (Suiza), del 21 al 24 de junio de ...
Vázquez de Aldana, Beatriz R., Zabalgogeazcoa, Iñigo, García Criado, Balbino, García Ciudad, Antonia   +3 more
openaire   +2 more sources

Ergovaline poisoning in a herd of dairy cows – a case report [PDF]

Medycyna Weterynaryjna, 2019
Endophytes are fungi of the genus Neotyphodium that live in symbiosis with grasses. The effects of this symbiosis can be both negative and positive. The negative effect may be due to alkaloids produced by endophytes that in higher concentrations are toxic to animals. The most common alkaloids produced by Neotyphodium fungi are ergovaline and lolitrem B.
JAN MARCZUK, JERZY ZIĘTEK, KATARZYNA ZWIERZ, STANISŁAW WINIARCZYK, KRZYSZTOF LUTNICKI, PIOTR BRODZKI, ŁUKASZ ADASZEK   +6 more
openaire   +1 more source

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

Effect of Sample Handling and Storage on Ergovaline Concentration in Fresh Tall Fescue Samples [PDF]

, 2020
Ergovaline is an ergot alkaloid produced by an endophyte (Neotyphodium coenophialum Morgan-Jones and Gams), found in tall fescue (Schedonorus arundinacea=Festuca arundinacea Schreb.) and causes a range of disorders across livestock species.
Smith, Lori, Coleman, Robert, Smith, S. Ray, Cotten, Krista L., Gaskill, Cynthia L.   +4 more
core   +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

Occurrence of Alkaloids in Grass Seeds Symbiotic With Vertically-Transmitted Epichloë Fungal Endophytes and Its Relationship With Antioxidants

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, Charlotte E. Seal, Fernando Biganzoli, Marco A. Molina-Montenegro, Marco A. Molina-Montenegro, Beatriz R. Vázquez-de-Aldana, Iñigo Zabalgogeazcoa, Lowell P. Bush, María A. Martínez-Ghersa, Claudio M. Ghersa   +9 more
doaj   +1 more source