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Microorganisms
Special Issues
Key Role of Rumen Microbial Community for Improving Production
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Key Role of Rumen Microbial Community for Improving Production

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

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 6943

Special Issue Editors

Dr. Yutaka Uyeno

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Guest Editor
Faculty of Agriculture, Shinshu University, Nagano, Japan
Interests: rumen microbial community; ruminant feeding; nutrition; methane emission
Dr. Pradeep Kumar Malik

E-Mail Website
Guest Editor
Bioenergetics and Environmental Sciences Division, ICAR-National Institute of Animal Nutrition and Physiology, Bengaluru, India
Interests: methane measurement; plant secondary metabolites; microbial diversity, functional genomics, methane mitigation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Research interests in the rumen microbial consortium of ruminants have increased among investigators in various fields, such as applied microbiology, animal nutrition, veterinary science, etc. Recent findings by these researchers, particularly those based on “-omics” technology, have also contributed to unveiling the "hidden world" of the community’s structure and its functions. Moreover, increasing concerns about greenhouse gas emissions from ruminants need effective solutions to address global warming and improve production efficiency. As such, the more we recognize interests in rumen ecology, the more researchers have to be accountable about what is going on within the ruminant. However, I personally ask myself whether scientific discovery has succeeded in keeping in line with social demands. How can we continue to give satisfiable answers to questions from producers and consumers?

There is an emerging demand for research progress in the rumen microbial community, which is closely related to advances in production technology and in animal science. To elevate this Special Issue to help future industrial progress, the Guest Editors invite you to submit original research papers that deal with investigations into the rumen microbial community, linking this research to ruminant production, animal health, feeding, production, and reproduction. In particular, in vivo studies that use limited numbers of animals, making it difficult to find statistical significance but giving enough evidence to illuminate a corner of knowledge connected to future innovation, are welcome.

Dr. Yutaka Uyeno
Dr. Pradeep Kumar Malik
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

  • rumen
  • omics technology
  • ruminant production
  • global warming
  • microbial community

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Published Papers (2 papers)

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19 pages, 4151 KiB  
Article
Effect of Tea Saponins on Rumen Microbiota and Rumen Function in Qinchuan Beef Cattle
by Xiaopeng Qu, Sayed Haidar Abbas Raza, Yanqing Zhao, Jiahan Deng, Jing Ma, Juze Wang, Nada Alkhorayef, Samia S. Alkhalil, Sameer D. Pant, Hongtao Lei and Linsen Zan
Microorganisms 2023, 11(2), 374; https://doi.org/10.3390/microorganisms11020374 - 1 Feb 2023
Cited by 7 | Viewed by 2616
Abstract
Antibiotics can promote livestock growth but have side effects, so the search for safe and effective alternatives to antibiotics is urgent. This study aimed to evaluate the effect of supplementing cattle feed with tea saponins on ruminal bacteria and fungi. Sixteen Qinchuan beef [...] Read more.
Antibiotics can promote livestock growth but have side effects, so the search for safe and effective alternatives to antibiotics is urgent. This study aimed to evaluate the effect of supplementing cattle feed with tea saponins on ruminal bacteria and fungi. Sixteen Qinchuan beef cattle with a live body weight of 250 ± 10 kg were divided into four groups (four animals in each group) using a completely randomized experimental design. Four different levels of tea saponins were provided to the Qinchuan cattle as treatments, including 0 g/cattle per day control, CON), 10 g/cattle per day (low-level, LT), 20 g/cattle per day (medium-level, MT) and 30 g/cattle per day (high-level, HT). The pre-feeding period was 10 days and the official period was 80 days in this experiment. After 90 days of feeding, the rumen fluid from sixteen Qinchuan beef cattle was collected using an oral stomach tube for evaluating changes in ruminal microbiota and rumen fermentation parameters. Results indicate that the total VFAs and proportions of propionate in the LT group was significantly higher than that in the CON and HT groups (p < 0.05). For ruminal bacteria, results indicate that the Chao1 index of the MT group was significantly lower than the CON and HT groups (p < 0.05). The phyla Bacteroidetes and Firmicutes were found to be the most abundant in all treatment groups, with the LT group having significantly increased relative abundances of Proteobacteria, Actinobacteria and Ascomycota at the phylum level (p < 0.05). The relative abundance of Bacteroides was found to be relatively lower in the LT, MT and HT treatment groups compared with the CON treatment group at the genus level (p < 0.05). For ruminal fungi, the LT treatment group was found to have higher relative abundances of Saccharomyces and Aspergillus, and lower relative abundances of Succiniclasticum and Bacteroides at the at the phylum level (p < 0.05). Compared with the CON treatment group, a significant increase in the relative abundance of Saccharomyces and Aspergillus were observed in the LT treatment group at the genus level (p < 0.05). PICRUSt analyses identified pathways associated with Xenobiotic biodegradation and metabolism and glycolysisIII to be significantly enriched in the LT and HT treatment groups (p < 0.05). These findings could provide insights on how tea saponins may influence ruminal bacteria and fungi, providing a theoretical basis for replacing antibiotics with tea saponins for promoting growth in cattle. Full article
(This article belongs to the Special Issue Key Role of Rumen Microbial Community for Improving Production)
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17 pages, 11370 KiB  
Article
Rumen and Fecal Microbiota Characteristics of Qinchuan Cattle with Divergent Residual Feed Intake
by Xiaonan Zhou, Ying Ma, Chaoyun Yang, Zhiyan Zhao, Yanling Ding, Yanfeng Zhang, Pengfei Wang, Lei Zhao, Chenglong Li, Zonghua Su, Xiaowei Wang, Wenxun Ming, Ling Zeng and Xiaolong Kang
Microorganisms 2023, 11(2), 358; https://doi.org/10.3390/microorganisms11020358 - 31 Jan 2023
Cited by 11 | Viewed by 3419
Abstract
Residual feed intake (RFI) is one of the indicators of feed efficiency. To investigate the microbial characteristics and differences in the gastrointestinal tract of beef cattle with different RFI, a metagenome methodology was used to explore the characteristics of the rumen and fecal [...] Read more.
Residual feed intake (RFI) is one of the indicators of feed efficiency. To investigate the microbial characteristics and differences in the gastrointestinal tract of beef cattle with different RFI, a metagenome methodology was used to explore the characteristics of the rumen and fecal microbiota in 10 Qinchuan cattle (five in each of the extremely high and extremely low RFI groups). The results of taxonomic annotation revealed that Bacteroidetes and Firmicutes were the most dominant phyla in rumen and feces. Prevotella was identified as a potential biomarker in the rumen of the LRFI group by the LEfSe method, while Turicibacter and Prevotella might be potential biomarkers of the HRFI and LRFI group in feces, respectively. Functional annotation revealed that the microbiota in the rumen of the HRFI group had a greater ability to utilize dietary polysaccharides and dietary protein. Association analysis of rumen microbes (genus level) with host genes revealed that microbiota including Prevotella, Paraprevotella, Treponema, Oscillibacter, and Muribaculum, were significantly associated with differentially expressed genes regulating RFI. This study discovered variances in the microbial composition of rumen and feces of beef cattle with different RFIs, demonstrating that differences in microbes may play a critical role in regulating the bovine divergent RFI phenotype variations. Full article
(This article belongs to the Special Issue Key Role of Rumen Microbial Community for Improving Production)
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