Transformation of bacterial community structure in rumen liquid anaerobic digestion of rice straw

Liang, Jinsong; Zheng, Wenge; Zhang, Haibo; Zhang, Panyue; Cai, Yajing; Wang, Qingyan; Zhou, Zeyan; Ding, Yiran

doi:10.1016/j.envpol.2020.116130

Cited by 50 publications

(17 citation statements)

References 53 publications

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“…The potential of ruminal microbiomes to convert plant biomass to various high- value compounds in vitro was developed through the research of in vitro ruminal fermentation 2, 26, 29 . However, the control of fermentation environment in vitro is one of the main factors leading to various results.…”

Section: Resultsmentioning

confidence: 99%

Copresent microbiome and short-chain fatty acids profiles of plant biomass utilization in rumen simulation technique system

Shi

Zhang

Wang

et al. 2022

Preprint

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Rumen contents have considerable utility in converting plant biomass to short-chain fatty acids (SCFAs) when used as inoculum for in vitro fermentation. To better understand the microbial communities and their functions when in vitro ruminal fermentation, the microbiome and SCFAs production were investigated using rumen simulation technique (RUSITEC) system which was inoculated/co-inoculated with rumen contents from goat and cow. This study reconstructed 1677 microbial metagenome-assembled genomes (MAGs) from metagenomic sequencing. The copresent microbiome containing 298 MAGs were found in metagenomic data of these contents and previous ruminal representative samples. These copresent MAGs were overrepresented in decomposing various substrates, especially pectin and xylan. Additionally, the SCFAs productions in RUSITEC were linked with copresent MAGs. Copresent MAGs obtained from this study shows promise to point out the direction for further research on in vitro ruminal fermentation, and enables a better understanding of rumen microbiotal structures and functions under in vitro condition.

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Section: Resultsmentioning

confidence: 99%

Copresent microbiome and short-chain fatty acids profiles of plant biomass utilization in rumen simulation technique system

Shi

Zhang

Wang

et al. 2022

Preprint

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“…The primary role of Bacteroidetes is connected to degrading diverse plant polysaccharides and improving the nutrient utilization of the host to enhance the host’s immunity ( Bayliss and Houston, 1984 ; Bäckhed et al, 2005 ). Firmicutes is another important role in the degradation of fiber and cellulose and is associated with the decomposition of polysaccharide and the utilization of energy ( Crisol-Martínez et al, 2017 ; Liang et al, 2021 ). In this study, the bacterial richness and taxonomic composition in the HA, MA, and LA groups were similar, and no significant difference was observed at the phylum level.…”

Section: Discussionmentioning

confidence: 99%

Effects of Replacing Alfalfa Hay With Native Grass Hay in Pelleted Total Mixed Ration on Physicochemical Parameters, Fatty Acid Profile, and Rumen Microbiota in Lamb

Du¹,

You

Sun

et al. 2022

Front. Microbiol.

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This study aimed to investigate the effects of replacing alfalfa with native grass on growth performance, meat quality, and rumen microbiota of lambs. Forty-five 6-month-old Ujimqin lambs with live body weight (BW) of 29.50 ± 0.26 kg were used for the experiment, and the lambs were assigned to three diet treatments (three pens per treatment and five lambs per pen) with 30 square meters per pen in semi-open housing based on similar BW. The lambs have received 30% alfalfa (HA, high alfalfa percentage group), 20% alfalfa (MA, moderate alfalfa percentage group), and 10% alfalfa (LA, low alfalfa percentage group) diets, respectively (dry matter basis). The diet treatments had a significant (P < 0.05) influence on the dry matter intake of lambs and the dry matter intake increased with the increasing percentages of native grass hay, while the significantly (P < 0.05) lower final BW and average daily gain were observed in the MA and LA groups compared with that in the HA group. The diet had a significant (P < 0.05) difference in meat pH value, water loss rate, cooked meat rate, moisture, and intramuscular fat, while no significant (P > 0.05) difference was found in protein. As native grass hay percentages increased in the diet, the contents of palmitic (C16:0) and palmitoleic (C16:1 cis-9) in the HA and MA groups were significantly (P < 0.05) lower than that in the LA groups, and compared with the HA group, the contents of elaidic (C18:1 trans-9), oleic (C18:1 cis-9), and linoleic (C18:2 cis-9–cis-12) were significantly (P < 0.05) increased in the MA and LA groups. The content of α-linolenic (C18:3n3) was significantly (P < 0.05) higher in the LA group than that in the HA and MA groups. The principal coordinate analysis profile displayed that the composition of the bacterial community of these groups was distinctly separated from each other. No significant (P > 0.05) difference was observed in the dominant rumen bacteria at the phyla and genus levels. In conclusion, the meat quality and fatty acid profile analysis revealed that replacing alfalfa hay with native grass hay is more beneficial for Mongolian lambs, and the meat from LA diet treatment is better than the others. In addition, correlation analysis of the association of rumen microbiome with growth performance, meat quality, and fatty acid profile provides us with a comprehensive understanding of the composition and function of rumen microbiota. These findings could provide knowledge of how the diet affects the animal performance, meat quality of lambs, and microbiota of the rumen, laying a theoretical basis for replacing alfalfa with native grass.

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“…In the Eukaryota , both Neocallimastix and Anaeromyces have a positive association with 2-hydroxystearic acid (serum) ( Figure 6 and Supplementary Table 12 ). Ruminococcaceae and Lachnospiraceae both specialize in the degradation of polysaccharides ( Liang et al, 2021 ) while some species of Butyrivibrio ( B. fibrisolvens ) were reported to be involved in xylan fermentation and butyrate production ( Emerson and Weimer, 2017 ). In the current study, correlation analysis revealed a strong and positive association between propionate percentage and some bacteria genera ( Ruminococcus , Eubacterium , Intestinibaculum , and Oribacterium ), signifying their role in the production of propionate.…”

Section: Discussionmentioning

confidence: 99%

Metagenomic and Metabolomic Insights Into the Mechanism Underlying the Disparity in Milk Yield of Holstein Cows

Amin

Zhang

et al. 2022

Front. Microbiol.

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This study was conducted to investigate the metabolic mechanism underlying the disparity in the milk yield of Holstein cows. Eighteen lactating Holstein cows in their second parity and 56 (±14.81 SD) days in milking (DIM) were selected from 94 cows. Based on the milk yield of the cows, they were divided into two groups of nine cows each, the high milk yield group (HP) (44.57 ± 2.11 kg/day) and the low milk yield group (LP) (26.71 ± 0.70 kg/day). The experimental cows were fed the same diet and kept under the same management system for more than 60 days. Rumen metagenomics revealed that two Archaea genera, one Bacteria genus, eight Eukaryota genera, and two Virus genera differ between the HP and LP groups. The analysis of metabolites in the rumen fluid, milk, and serum showed that several metabolites differed between the HP and LP groups. Correlation analysis between the predominant microbiota and milk yield-associated metabolites (MP-metabolites) revealed that four Bacteria and two Eukaryota genera have a positive relationship with MP-metabolites. Pathway enrichment analysis of the differential metabolites revealed that five pathways were enriched in all the samples (two pathways in the milk, two pathways in the serum, and one pathway in the rumen fluid). Further investigation revealed that the low milk yield observed in the LP group might be due to an upregulation in dopamine levels in the rumen fluid and milk, which could inhibit the release of prolactin or suppress the action of oxytocin in the udder resulting in reduced milk yield. On the other hand, the high milk yield in the HP group is attributed to an upregulation in citrulline, and N-acetylornithine, which could be used as substrates for energy metabolism in the citric acid cycle and ultimately gluconeogenesis.

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Transformation of bacterial community structure in rumen liquid anaerobic digestion of rice straw

Cited by 50 publications

References 53 publications

Copresent microbiome and short-chain fatty acids profiles of plant biomass utilization in rumen simulation technique system

Copresent microbiome and short-chain fatty acids profiles of plant biomass utilization in rumen simulation technique system

Effects of Replacing Alfalfa Hay With Native Grass Hay in Pelleted Total Mixed Ration on Physicochemical Parameters, Fatty Acid Profile, and Rumen Microbiota in Lamb

Metagenomic and Metabolomic Insights Into the Mechanism Underlying the Disparity in Milk Yield of Holstein Cows

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