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Heat stress mediates changes in fecal microbiome and functional pathways of laying hens

  • Environmental biotechnology
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Abstract

Chicken gastrointestinal microbiota plays important roles in health, productivity, and disease. However, knowledge of the relationship between heat stress and the gut microbial ecosystem of poultry, especially laying hens, is still limited. Here, we aimed to provide important knowledge for heat stress intervention in the egg industry. We performed high-throughput sequencing metagenomics on fecal contents to unravel the microbial taxa and functional capacity of the gut microbiome of caged laying hens under heat stress. Results showed that the fecal microbial communities of laying hens were dominated by Firmicutes, Bacteroidetes, and Proteobacteria phyla. The Firmicutes were significantly decreased, and Bacteroidetes were increased in the fecal microbiota under heat stress. Functional prediction of these changes in microbiota revealed that metabolism-related pathways, including cysteine and methionine metabolism and benzoate degradation, were more abundant. Conversely, retinol metabolism and phenylpropanoid biosynthesis were decreased by heat stress, suggesting differences in metabolism between layers in different temperature environments. Clear contributions were identified between active taxa (genus level) and metabolic pathways, which were associated with the liver and intestinal dysfunction in layers. These data revealed that heat stress induced a significant taxonomic perturbation in the gut microbiome of caged laying hens. This was related to the negative effects of heat stress in poultry and provided important basic knowledge for heat stress intervention.

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Funding

This study was supported by grants from the SAAS Program for Excellent Research Team (SPERT) and China Agriculture Research System (CARS-40-K03).

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Correspondence to Lihui Zhu or Changsuo Yang.

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This study was consistent with those approved by the Animal Ethics and Use Committee of Shanghai Academy of Agricultural Sciences that adopted the Animal Care and Use guidelines.

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The authors declare that they have no conflict of interest.

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This article does not contain any studies with human participants performed by any of the authors.

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Zhu, L., Liao, R., Wu, N. et al. Heat stress mediates changes in fecal microbiome and functional pathways of laying hens. Appl Microbiol Biotechnol 103, 461–472 (2019). https://doi.org/10.1007/s00253-018-9465-8

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  • DOI: https://doi.org/10.1007/s00253-018-9465-8

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