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Journals
Microorganisms
Special Issues
Gastrointestinal Fermentation and Microbiota
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Gastrointestinal Fermentation and Microbiota

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Gut Microbiota".

Deadline for manuscript submissions: 15 September 2024 | Viewed by 3815

Special Issue Editors

Prof. Dr. Hucheng Wang

E-Mail Website
Guest Editor
College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730030, China
Interests: rumen bacteria; fermentation
Prof. Dr. Guo Yang

E-Mail Website
Assistant Guest Editor
1. Chinese Academy of Sciences, Lanzhou, China
2. Key Laboratory of Stress Physiology and Ecology, Lanzhou, China
Interests: nutrient metabolism and regulation in ruminants
Prof. Dr. Shengguo Zhao

E-Mail Website
Assistant Guest Editor
College of Animal Science and Technology/Gansu Key Laboratory of Herbivorous Animal Biotechnology, Gansu Agricultural University, Lanzhou 730070, China
Interests: protection and utilization of livestock genetic resources and the efficient production system of ruminant including livestock; genetics diversity; genetic resources; stress resistance; rumen microorganism

Special Issue Information

Dear Colleagues,

The gastrointestinal tract, the place in which organisms digest and utilise food, contains an abundance of microorganisms in addition to a wide range of digestive enzymes. These microorganisms are able to use matter, breaking it down into volatile fatty acids, carbon dioxide, and methane, and these products are also involved in the metabolic processes of microbial growth. It is worth noting that although the dominant microbial species are similar within the same species, their abundance and species are regulated by a number of factors including the host, diet, lifestyle, age, sampling site, etc. In recent decades, the assessment of microbial function in the gastrointestinal tract has increased due to the widespread use of high-throughput sequencing technologies. However, the specificity of the environment in which the microorganisms live makes artificial culture more difficult, and further research for specific strains is limited. The combination of advanced -omics techniques with classical biochemistry and microbiology methods contribute to high-resolution characterization of the gastrointestinal microbiome as well as to understanding its relationship with fermentation performance. Moreover, these studies can reveal the health mechanism of microorganisms and hosts and provide theoretical and technical support for the development and utilization of environment-friendly microecological agents.

In this context, for this Special Issue, we invite you to submit relevant contributions on the fermentation properties and microbial diversity found in the gastrointestinal tract of any living organism, or the potential of the bacteria, archaea, or eukaryotes that inhabit it. This Special Issue will cover research and review papers focusing on an in-depth exploration of the microbial and fermentation properties of the gastrointestinal tract, the exploration of its regulatory factors, the analysis of the correlation between microbial and environmental factors to reveal the mechanisms of their interactions, and the potential biotechnological applications of some specific strains obtained from isolated cultures.

Prof. Dr. Hucheng Wang
Guest Editor

Prof. Dr. Guo Yang
Prof. Dr. Shengguo Zhao
Assistant Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Microorganisms is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • animal (swine, poultry, cow, beef cattle, sheep, goat, aquatic life)
  • gastrointestinal tract
  • growth performance
  • gut bacterial metabolite
  • gut microbial profile
  • microbiome
  • microbe-host interact
  • intestinal inflammation
  • rumen fermentation
  • silage

Published Papers (2 papers)

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Research

16 pages, 2984 KiB  
Article
Effects of Different Yeast Selenium Levels on Rumen Fermentation Parameters, Digestive Enzyme Activity and Gastrointestinal Microflora of Sika Deer during Antler Growth
by Weili Sun, Hongpeng Shi, Chengyan Gong, Keyuan Liu and Guangyu Li
Microorganisms 2023, 11(6), 1444; https://doi.org/10.3390/microorganisms11061444 - 30 May 2023
Cited by 4 | Viewed by 1145
Abstract
The aim of this experiment was to study the effects of different selenium supplemental levels on rumen fermentation microflora of sika deer at the velvet antler growth stage. A total of 20 5-year-old, healthy sika deer at the velvet antler growth stage with [...] Read more.
The aim of this experiment was to study the effects of different selenium supplemental levels on rumen fermentation microflora of sika deer at the velvet antler growth stage. A total of 20 5-year-old, healthy sika deer at the velvet antler growth stage with an average body weight of (98.08 ± 4.93) kg were randomly divided into 4 groups, and each group was fed in a single house. The SY1 group was the control group, and the SY2 group, SY3 group and SY4 group were fed a basal diet supplemented with 0.3, 1.2 and 4.8 mg/kg selenium, respectively. The pretest lasted for 7 days, and the formal trial period lasted for 110 days. The results show that: At the velvet antler growth stage, the digestibility of neutral detergent fiber and acid detergent fiber of sika deer in the SY2 group was significantly higher than that in the control group (p < 0.01). The digestibility of cellulose and crude fiber of sika deer in the SY2 group was significantly higher than those in the SY3 and SY4 groups (p < 0.01) and significantly higher than that in the control group (p < 0.05). The contents of acetic acid and propionic acid in the rumen fluid of sika deer in the SY2 group were significantly higher than those in the SY1 group (p < 0.05). Digestive enzyme analysis of rumen fluid at the velvet antler growth stage showed that the activity of protease in rumen fluid in the SY2 group was significantly lower than those in the SY1 group and SY4 group (p < 0.05). The relative abundance of Fibrobacter succinogenes in the SY2 group was significantly higher than that in the SY1 group (p < 0.05) and extremely significantly higher than those in the SY3 and SY4 groups (p < 0.01). Correlation analysis between yeast selenium level and bacterial abundance showed that the yeast selenium content in rumen fluid was significantly positively correlated with Butyrivibrio and Succiniclasticum (p < 0.01). Further verification of bacterial flora functioning showed that the SY2 group was more inclined to the degradation and utilization of fiber. In conclusion, 0.3 mg/kg selenium supplementation can increase the abundance of Prevotella ruminicola and Fibrobacter succinogenes in the rumen of sika deer and improve the degradation of fibrous substances by mediating the catabolite repression process. Full article
(This article belongs to the Special Issue Gastrointestinal Fermentation and Microbiota)
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18 pages, 1072 KiB  
Article
The Impact of Mineral and Energy Supplementation and Phytogenic Compounds on Rumen Microbial Diversity and Nitrogen Utilization in Grazing Beef Cattle
by Ronyatta Weich Teobaldo, Yury Tatiana Granja-Salcedo, Abmael da Silva Cardoso, Milena Tavares Lima Constancio, Thais Ribeiro Brito, Eliéder Prates Romanzini and Ricardo Andrade Reis
Microorganisms 2023, 11(3), 810; https://doi.org/10.3390/microorganisms11030810 - 22 Mar 2023
Cited by 2 | Viewed by 1574
Abstract
The objective of this study was to evaluate the effect of the addition of a phytogenic compound blend (PHA) containing hydrolyzable tannins, carvacrol, and cinnamaldehyde oil to mineral salt or energy supplementation on the rumen microbiota and nitrogen metabolism of grazing Nellore cattle. [...] Read more.
The objective of this study was to evaluate the effect of the addition of a phytogenic compound blend (PHA) containing hydrolyzable tannins, carvacrol, and cinnamaldehyde oil to mineral salt or energy supplementation on the rumen microbiota and nitrogen metabolism of grazing Nellore cattle. Eight castrated Nellore steers were distributed in a double-Latin-square 4 × 4 design, with a 2 × 2 factorial arrangement (two types of supplements with or without the addition of the PHA), as follows: energy supplement without the PHA addition (EW); energy supplement with the PHA addition (EPHA); mineral supplement without the addition of the PHA (MW); mineral supplement with the PHA addition (MPHA). Steers that received supplements with the PHA have a lower ruminal proportion of valerate (with the PHA, 1.06%; without the PHA, 1.15%), a lower ruminal abundance of Verrucomicrobia, and a tendency for lower DM digestibility (with the PHA, 62.8%; without the PHA, 64.8%). Energy supplements allowed for higher ammonia concentrations (+2.28 mg of NH3-N/dL), increased the propionate proportion (+0.29% of total VFA), and had a higher ruminal abundance of Proteobacteria and Spirochaetae phyla in the rumen. The PHA addition in the supplement did not improve nitrogen retention, reduced the ruminal proportion of valerate, and had a negative impact on both the total dry-matter digestibility and the abundance of several ruminal bacterial groups belonging to the Firmicutes and Verrucomicrobia phyla. Full article
(This article belongs to the Special Issue Gastrointestinal Fermentation and Microbiota)
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