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Saturday, August 1, 2020 | History

2 edition of Studies of the fungal endophyte Acremonium coenophialum in tall fescue found in the catalog.

Studies of the fungal endophyte Acremonium coenophialum in tall fescue

Mark D. Azevedo

Studies of the fungal endophyte Acremonium coenophialum in tall fescue

by Mark D. Azevedo

  • 289 Want to read
  • 37 Currently reading

Published .
Written in English

    Subjects:
  • Tall fescue -- Diseases and pests.,
  • Acremonium.,
  • Plant-fungi relationships.

  • Edition Notes

    Statementby Mark D. Azevedo.
    The Physical Object
    Pagination140 leaves, bound :
    Number of Pages140
    ID Numbers
    Open LibraryOL15184959M

      A study of the fungal endophyte Acremonium coenophialum in the roots of tall fescue seedlings. Coronavirus: A study of the fungal endophyte Acremonium coenophialum in the roots of tall fescue seedlings. Azevedo MD, Welty RE. Mycologia, 01 Jun , 87(3): DOI: / Epichloë coenophiala is a systemic and seed-transmissible endophyte of tall fescue, a grass endemic to Eurasia and North Africa, but widely naturalized in North America, Australia and New endophyte has been identified as the cause of the "fescue toxicosis" syndrome sometimes suffered by livestock that graze the infected le symptoms include poor weight gain, elevated.

    are known hosts for fungal endophytes (Clay, ). This system has been well studied in an agri-cultural setting in Festuca arundinacea Schreb. var. KY31, tall fescue, infected with the asexual Acremonium coenophialum Morgan-Jones and Gams. Tall fescue is a widely planted forage grass in the Southeastern USA. Alkaloids produced by its fungal. A study of the fungal endophyte Acremonium coenophialum in the roots of tall fescue seedlings. Mycologia Baker, G.M. Mycorrhizal infection influences Acremonium -induced resistance to Argentine stem weevil in ryegrass. p.

    Effects of the Fungal Endophyte Acremonium coenophialum on Nitrogen Accumulation and Metabolism in Tall Fescue Philip C. Lyons1, John J. Evans, and Charles W. Bacon* Department of Plant Pathology, University of Georgia, Athens, Georgia (P.C.L.), and Richard B. Russell Agricultural Research Center, U.S. Department of Agriculture. Tall fescue endophyte description. Initially, Bacon et al. identified the tall fescue endophytes as E. typhina, which was later renamed Acremonium coenophialum to acknowledge the anomorphic state of Epichloë species (Morgan-Jones and Gams, ).Christensen and Latch described variation among isolates of A. coenophialum from tall fescue, and in the taxonomy of these endophytes was.


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Studies of the fungal endophyte Acremonium coenophialum in tall fescue by Mark D. Azevedo Download PDF EPUB FB2

Title: STUDIES OF THE FUNGAL ENDOPHYTE ACREMONIUM COENOPHIALUM IN TALL FESCUE Signature redacted for privacy.

AN ABSTRACT OF THE THESIS OF Mark D. Azevedo for the degree of Master of Science in Botany and Plant Patholocry presented on June 9, A Study of the Fungal Endophyte Acremonium coenophialum in the Roots of Tall Fescue Seedlings Mycologia, 87(3),pp.by The New York Botanical Garden, Bronx, NY Issued6 July Tall fescue is thought to have co-evolved with the fungal endophyte Acremonium coenophialum to form a mutualistic relationship.

Endophyte-infected (EI) plants can have increased growth and survival when compared with endophyte-free (EF) plants. Responses to endophyte-infection vary and are host-genotype and fungal-biotype : Mark D.

Azevedo. This study was undertaken to determine the effect of the fungal endophyte, Acremonium coenophialum Morgan‐Jones and Gams [syn. Epichloe typhina (Fries) Tulasne], on weight gains and symptoms of tall fescue toxicity of cattle. Grazing studies were started in the spring of and continued through the – and – grazing periods, on ‘Kenhy’ tall fescue having high and low levels of endophyte infection Cited by: Studies of the fungal endophyte Acremonium coenophialum in tall fescue.

Presentation date: Tall fescue is thought to have co-evolved with the fungal endophyte Acremonium coenophialum to form a mutualistic relationship. Endophyte-infected (EI) plants can have increased growth and survival when compared with endophyte-free. The fungal endophyte Acremonium coenophialum has been implicated in fescue toxicosis, an animal disorder common on the 14 × 10⁶ ha of tall fescue (Festuca arundinacea) grown in.

Because E. coenophialum lives endophytically in tall fescue seeds, we hypothesized that PGP bacteria also live within the seeds and could provide fitness advantages to the host.

Endophyte-infected (E+) and endophyte-free (E−) Kentucky tall fescue seeds were surface sterilized to remove epiphytic bacteria. Pregnancy rates reported for cows grazing endophyte-infected (Acremonium coenophialum) tall fescue are 67%, 55%, 33%, 80%, %, and 39%, whereas pregnancy rates for control cows grazing uninfected or low-endophyte fescue pastures are 86%, 96%, 93%, 90%, %, and 65%, respectively.

35 Plasma prolactin concentrations are decreased in cows that consume endophyte. Azevedo M. and Welty R. (): A study on the fungal endophyte Acremonium coenophialum in the roots of tall fescue seedlings.

Mycologia, 87 (3), of fescue plants were infected with an endophyte (Acremonium coenophialum). “endophyte” means internal fungus; it grows inside fescue plants.

soon thereafter it was learned that this endophyte can produce toxins (specifically, ergot alkaloids) that can have profound negative effects on grazing animals. however, the endophyte. Increased plant growth and morphological alterations are characteristics of tall fescue (Festuca arundinacea Schreb.) infected with a fungal endophyte (Acremonium coenophialum Morgan‐Jones & Gams).

A study was conducted to determine if there were ancillary plant growth regulators produced by the endophyte, which could account for these vegetative characteristics. fied as Acremonium coenophialum) was not associat- ed with animal disorders until the late s.

Since then our understanding of tall fescue/ endophyte/ ani- mal relationships has greatly increased. Two characteristics of the endophyte are of great practical importance. First, the fungus lives within. Although there is some evidence to suggest that shoot-specific fungal endophytes in tall fescue play a role in altering classes of chemical compounds in root exudates (e.g., phenolics, carbohydrates, etc.), there are currently no detailed studies on whether this symbiosis influences the release of specific chemical compounds.

The greatest problem in detecting N. coenophialum in tall fescue is the lack of morphological characteristics of infected tillers or seeds that point clearly to endophyte presence (see Chapter 14).Factors such as poor utilization by grazing livestock, greenness during drought, and absence of insect damage are associated with endophyte presence, but are not definitive characteristics of.

trials with EI Effects of Acremonium coenophialum infestation, bermuda grass and nitrogen or clover on steers grazing condition because of tall fescue pastures. Prod. Agric. and EF fescue Crawford, RJ., JR Forwood, RL.

Belyea and Relationship between level of. Infection by the fungal endophyte Acremonium coenophialum affected the accumulation of inorganic and organic N in leaf blades and leaf sheaths of KY31 tall fescue (Festuca arundinacea Schreb.) grown under greenhouse conditions.

Total soluble amino acid concentrations were increased in either the blade or sheath of the leaf from infected plants. Azevedo, MD, Welty, RE A study of the fungal endophyte Acremonium coenophialum in the roots of tall fescue seedlings Mycologia 87 Google Scholar Bacon, C W Abiotic stress tolerances (moisture, nutrients) and photosynthesis in endophyte-infected tall fescue Agric.

Ecosyst. Williams et al.-Chemical control of tall fescue endophyte Table 1 Effect of systemic fungicides on the incidence of tall fescue endophyte in mature plants in the greenhouse.

% infection I Rate Foliar /application Total With Without treatment (kg a.i./ha) (kg a.i./ha) propiconazole2 propiconazole x Benomyl 50 WP 40 a1 a The bird-cherry oat aphid Rhopalosiphum padi L.

avoided tall fescue (Festuca arundinacea Schreb.) plants infected with the endophyte Acremonium coenophialum Morgan-Jones & Gams but settled on tall fescue infected with a Phialophora-like endophyte and on endophyte-free presence of either Acremonium loliae Latch, Christensen & Samuels or a Gliocladium-like endophyte in perennial.

Tall fescue [Lolium arundinaceum (Schreb.)] is a cool-season perennial grass used in pastures throughout the Southeastern United States. The grass can harbor a shoot-specific fungal endophyte (Epichloë coenophiala) thought to provide the plant with enhanced resistance to biotic and abiotic stresses.

Because alkaloids produced by the common variety of the endophyte cause severe animal. Grazing studies were started in the spring of and continued through the and grazing periods, on 'Kenhy' tall fescue having high and low levels of endophyte infection, at Dallas, TX, on Houston black clay soil (fine, montmorillonic, thermic Udic Pellusterts).

Av. daily gains were kg and kg for the high- and low-infested pastures, respectively.Infection by A. coenophialum affected the accumulation of inorganic and organic N in leaf blades and leaf sheaths of KY 31 tall fescue (Festuca arundinacea.) grown under greenhouse conditions.

Total soluble amino acid concn were increased in either the blade or sheath of the leaf from infected plants. A number of amino acids were significantly increased in the sheath, but only asparagine.The endophyte, Acremonimum coenophialum, grows symbiotically with tall fescue.

It is similar to the ergot fungus although A. coenophialum is evolutionarily derived from Epicloe typhina. This fungus is the reason for some of the advantages of fescue, such as insect resistance.

However, it .