Influence ofSaccharomyces cerevisiaeDose on Ruminal Fermentation and Digestion in Sheep Fed a Corn Stover Diet

Crosby, M.M.; Mendoza, G. D.; Bárcena, R.; González, S.; Aranda, E. M.

doi:10.1080/09712119.2004.9706465

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…The higher digestibility values could be explained by a higher population of cellulolytic bacteria, which is one of the most consistent effects of yeast (Martin & Nisbet, 1992;Wallace & Newbold, 1993). However, the positive effects are not consistent, even in experiments with increasing doses of yeast (Crosby et al, 2004) where cell viability was not certified.…”

Section: Discussionmentioning

confidence: 89%

“…This may be explained by the lignocellulosic characteristic of the substrates, because the doses used by Tang et al (2008) were higher than in the current experiment. Several studies have confirmed that substrates with low digestibility do not respond to yeast supplementation in vivo (Roa et al, 1997;Arcos-García et al, 2000;Crosby et al, 2004). It is possible that the variability in response to yeast supplementation in terms of forage quality is a function of the potentially digestible fraction, as has been suggested for the response to fibrolytic enzymes (Mendoza et al, 2014), which is another factor that needs to be considered in yeast evaluation assays.…”

Section: Discussionmentioning

confidence: 98%

“…They have thus been regarded as rumen pH stabilisers (Chaucheyras-Durand et al, 2008;Desnoyers et al, 2009). In most in vivo evaluations of commercial products that contain Saccharomyces cerevisiae, researchers confirmed that the amounts of live cells were described by the commercial manufactures (Crosby et al, 2004;Pinloche et al, 2013;Ahmed et al, 2015;Pienaar et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Effects of types and doses of yeast on gas production and in vitro digestibility of diets containing maize (Zea mays) and lucerne (Medicago sativa) or oat hay

et al. 2016

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Two yeast products formulated with Saccharomyces cerevisiae were evaluated at the same colonyforming units (CFUs) per gram of substrate. Samples of maize, lucerne and oat hays were mixed (0.5 kg) to a proportion of 80% forage (lucerne or oat) with 20% maize (DM basis) and combined with each yeast to obtain 1.5 x 10 7 or 3.0 x 10 7 CFU/g DM. There was also a control without yeast. In vitro gas production was measured at 0, 2, 4, 6, 8, 10, 14, 18, 24, 30, 36, 42, 48, 60, and 72 h incubation. There was no forage/yeast interaction. Both yeast products tended to reduce the maximum volume produced quadratically and lag time linearly, while in vitro dry matter digestibility (IVDMD) increased linearly. Ruminal ammonia N and lactic acid were not affected, whereas methane and carbon dioxide tended to be reduced with the intermediate dose of yeast. When the mixture included oat hay, the total volume of gas increased, the lag time decreased, and there was higher IVDMD than in the lucerne-based mixtures, which were associated with lower methane production. Ammonia and lactic acid remained unchanged. The two yeast products showed the same effects on the dynamics of gas production and in vitro digestibility when dosed at the same number of viable cells or CFUs, and there was no interaction with forage quality.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Effects of types and doses of yeast on gas production and in vitro digestibility of diets containing maize (Zea mays) and lucerne (Medicago sativa) or oat hay

et al. 2016

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“…According to these results, Ferriere (2017) [41] found no effect of two commercial yeasts (Ganadero PLUS ® and LEVUCELL SC-10 ® ) when studying the digestibility percentages of NDF and ADF (43.88% and 39.84%, respectively) for 72 h of in vitro fermentation with alfalfa hay as a substrate, also coinciding with what was reported by Suntara (2020) [42], who found no differences in the apparent digestibility of DM, NDF, and ADF when adding two yeast strains (Pichia kudriavzevii and Candida tropicalis) in the in vitro ruminal fermentation of rice straw silage. Using corn stubble as a substrate, Angeles et al (1999) [43] and Crosby et al (2011) [44] also did not find improvements in ruminal fermentation when adding commercial yeast strains (S. cerevisiae) in increasing doses from 0.015 to 7 g/day, and the digestibility results range over 55-64% DM, 57-61% NDF, and 25.28% ADF. On the other hand, some studies showed improvements in the DM and NDF digestibility indicators when fibrous diets were evaluated, fundamentally because they increased the number of cellulolytic bacteria and fungi and their fibrolytic activities [16,36,[45][46][47][48].…”

Section: Resultsmentioning

confidence: 98%

Effect of Live Yeasts (Pichia guilliermondii) on In Vitro Fermentation of Corn Stover as a Fibrous Substrate

et al. 2022

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The objective of the present study was to examine the potential utilization of the yeast strain Pichia guilliermondii (Levica 27) on the ruminal fermentation of corn stover. Two in vitro treatments were evaluated: A) filtered rumen liquid + powdered corn stover + yeast-free culture medium and B) filtered rumen liquid + powdered corn stover + culture medium inoculated with yeast. Samples were collected at 0, 6, 12, and 24 h and examined for effects on culture pH, ammonia nitrogen (NH3-N), the fiber digestibility percentages of neutral detergent fiber and acid detergent fiber, the digestibility of dry matter, and the concentration of volatile fatty acids (VFAs). The results showed that the addition of Levica 27 had no effect on the ruminal pH, NH3-N or the digestibility indicators (p > 0.05). However, at 12 h, the inclusion of Levica 27 increased (p < 0.05) the molar concentrations of total VFAs and acetic and propionic acids in ruminal fluid and decreased (p < 0.05) the C2:C3 ratio. It is concluded that Levica 27 seems to have a stimulating effect on ruminal fermentation over a range within 6 and 12 h, a result that should be taken into account when in vivo studies are performed with this yeast strain.

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Current awareness on yeast

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Yeast

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In order to keep subscribers up‐to‐date with the latest developments in their field, this current awareness service is provided by John Wiley & Sons and contains newly‐published material on yeasts. Each bibliography is divided into 10 sections. 1 Books, Reviews & Symposia; 2 General; 3 Biochemistry; 4 Biotechnology; 5 Cell Biology; 6 Gene Expression; 7 Genetics; 8 Physiology; 9 Medical Mycology; 10 Recombinant DNA Technology. Within each section, articles are listed in alphabetical order with respect to author. If, in the preceding period, no publications are located relevant to any one of these headings, that section will be omitted. (5 weeks journals ‐ search completed 21st. July 2004)

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Influence ofSaccharomyces cerevisiaeDose on Ruminal Fermentation and Digestion in Sheep Fed a Corn Stover Diet

Cited by 6 publications

References 10 publications

Effects of types and doses of yeast on gas production and <i>in vitro</i> digestibility of diets containing maize (<i>Zea mays</i>) and lucerne (<i>Medicago sativa</i>) or oat hay

Effects of types and doses of yeast on gas production and <i>in vitro</i> digestibility of diets containing maize (<i>Zea mays</i>) and lucerne (<i>Medicago sativa</i>) or oat hay

Effect of Live Yeasts (Pichia guilliermondii) on In Vitro Fermentation of Corn Stover as a Fibrous Substrate

Current awareness on yeast

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