Effect of Various Essential Oils Isolated from Douglas Fir Needles upon Sheep and Deer Rumen Microbial Activity

Oh, Hi Kon; Sakai, T.; Jones, M. B.; Longhurst, William M.

doi:10.1128/aem.15.4.777-784.1967

Cited by 132 publications

(47 citation statements)

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“…The adverse effect of E. citriodora on DMD may be due to citronellal as it has been shown to strongly inhibits rumen microbial activity and exhibit activity against both Gram-positive and Gram-negative bacteria. 34,36 M. piperita is rich in menthol and menthone, and in agreement with our results, Patra and Yu 23 observed negligible effects on DMD while GP (DM incubated basis) decreased from ground alfalfa hay:dairy concentrate (50:50) when it was included at 250 mg L −1 . In contrast, DMD of ground alfalfa hay: concentrate at (50:50) and (80:20) were adversely affected by M. piperita (menthol type) when it was included at dosages of 500-1000 mg L −1 and 1 mL L −1 , respectively.…”

Section: Effects Of Essential Oils On In Vitro Digestibilitysupporting

confidence: 90%

Effects of essential oils from medicinal plants acclimated to Benin on in vitro ruminal fermentation of Andropogon gayanus grass

Kouazounde

Jin

Assogba

et al. 2014

J. Sci. Food Agric.

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Section: Effects Of Essential Oils On In Vitro Digestibilitysupporting

confidence: 90%

Effects of essential oils from medicinal plants acclimated to Benin on in vitro ruminal fermentation of Andropogon gayanus grass

Kouazounde

Jin

Assogba

et al. 2014

J. Sci. Food Agric.

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“…Monoterpenes deter feeding by cervids (Welch et al 1981, Elliott and Loudon 1987, Duncan et al 1994 demonstrated that the five monoterpenes identified in Western redcedar in this paper were repellent to wild Sitka black-tailed deer when offered in feeding choice experiment at the concentration of lightlybrowsed young Western redcedar. Monoterpenes, being volatile, could act as olfactory deterrent signals and/or have toxic effects on ruminal microbial fermentation or nervous system (Nagy et al 1964, Oh et al 1967, Millet et al 1981, Provenza et al 1992, Villalba and Provenza 2000. Diterpenes occurred in much lower concentrations than monoterpenes.…”

Section: Variation In Damage Is Correlated With Defensesmentioning

confidence: 99%

Disentangling the causes of damage variation by deer browsing on young Thuja plicata

Vourc’H¹,

Vila²,

Gillon³

et al. 2002

Oikos

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Long‐lived trees experience different levels of damage due to mammalian herbivores. To untangle the mechanisms that underlie this variation, we combined chemical with dendrochronological analyses to study variation in browsing on Western redcedars (Thuja plicata) on Haida Gwaii (British Columbia, Canada). Since the last glaciation, Haida Gwaii forests had lacked large herbivore browser until Sitka black‐tailed deer (Odocoileus hemionus sitkensis) were introduced at the beginning of the 20th century. Dendrochronology yielded information on radial growth and plant annual responses to environmental stresses including herbivory. Secondary metabolite content and plant nutritional quality provided insights into proximate causes of food choices made by herbivores. We sampled lightly‐ and heavily‐browsed young trees at four sites: three clear‐cut sites with high browsing pressure and one old‐growth forest site where browsing pressure had, until recently, been lower. Heavily‐browsed young trees had lower concentrations of secondary metabolites and were of lower nutritive value than lightly‐browsed trees at all sites. Under high browsing pressure, tree growth patterns suggested that all young trees were initially severely browsed until some trees, currently scored as lightly‐browsed, started to escape deer. At the old‐growth site, both lightly‐ and heavily‐browsed trees tended to have lower overall average secondary metabolite concentrations than those of all other sites, a trend possibly related to greater canopy closure. Lightly‐browsed trees were older than heavily‐browsed ones which resulted, during the period of lower browsing pressure, in higher growth rate and a same pattern of change in growth from one year to the next year. This suggests that, under low browsing pressure, selection of young trees related to chemical defense was weak and that growth differences due to other factors than browsing could be expressed. Under strong browsing pressure, however, all young trees had equally low growth rates until trees with better genetic potential to produce effective defenses were able to escape deer. This suggests that selection by deer could occur on a long‐lived tree.

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“…1989) at very low concentrations. It has been reported that some essential oils have an antibacterial action to some ruminal bacteria of sheep and deer (Oh et al . 1967; Nagy & Tengerdy 1968).…”

Section: Introductionmentioning

confidence: 99%

Effects of the essential oil cyclodextrin complexes on ruminal methane production in vitro

Tatsuoka¹,

Hara²,

Mikuni³

et al. 2008

Animal Science Journal

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The effects of including essential oil cyclodextrin (CD) complexes on ruminal methane and hydrogen production, volatile fatty acid (VFA) and protozoa were studied in vitro. The essential oil CD complexes used in the present study were both aCD and bCD with cineol, eucalyptus, menthol, peppermint, thyme and wasabi. Diluted rumen fluid (60 mL) was incubated anaerobically at 38°C for 6 h with the essential oil CD complex (1-40 mg as oil). Eucalyptus-aCD reduced methane production by 40% with 10 mg as oil along with decreasing the protozoal number and increasing total VFA and proportion of propionic acid. Both wasabi-aCD and wasabi-bCD reduced methane production by 85% and 97%, respectively, with 10 mg as oil, though they increased hydrogen production notably. The protozoal number was unchanged by wasabi-bCD and decreased to 50% by wasabi-aCD. Propionic acid was increased by both wasabi-aCD and wasabi-bCD. The other essential oil-CD showed no significant effect on reducing methane production. The combined use of 20 mM of fumaric acid with wasabi-aCD (1 mg as oil) caused about a 50% depression of methane production compared to the control without increasing hydrogen production. Fumaric acid was more effective than malic acid in reducing methane production. The addition of eucalyptus-aCD, wasabi-aCD or wasabi-bCD together with organic acid to rumen fluid turned out to be effective for reducing methane production with no increase in hydrogen production.Animal Science Journal (2008) 79, 68-75 ABCD; means in the same column within each CD compound having different superscripts are significantly different (P < 0.05).

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Effect of Various Essential Oils Isolated from Douglas Fir Needles upon Sheep and Deer Rumen Microbial Activity

Cited by 132 publications

References 0 publications

Effects of essential oils from medicinal plants acclimated to Benin on in vitro ruminal fermentation of Andropogon gayanus grass

Effects of essential oils from medicinal plants acclimated to Benin on in vitro ruminal fermentation of Andropogon gayanus grass

Disentangling the causes of damage variation by deer browsing on young Thuja plicata

Effects of the essential oil cyclodextrin complexes on ruminal methane production in vitro

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