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Effects of acute and chronic heat stress on the rumen microbiome in dairy goats

  • Min Li (College of Animal Sciences, Zhejiang University) ;
  • Lian-Bin Xu (College of Animal Sciences, Zhejiang University) ;
  • Chen Zhang (College of Animal Sciences, Zhejiang University) ;
  • Pei-Hua Zhang (College of Animal Science and Technology, Hunan Agricultural University) ;
  • Sha Tao (Department of Animal and Dairy Science, University of Georgia) ;
  • Hong-Yun Liu (College of Animal Sciences, Zhejiang University)
  • Received : 2024.02.28
  • Accepted : 2024.06.18
  • Published : 2024.12.01

Abstract

Objective: The objective of this study was to reveal the influence of acute and chronic heat stress (HS) on the abundance and function of rumen microbiome and host metabolism. Methods: Forty mid-lactation goats were randomly divided into two artificial environments: control group and heat-stressed group. This study was recorded from two periods, 1 day and 28 days. The first day was defined as control 1 (CT1) and HS 1 (acute HS), and the last day was defined as CT28 and HS28 (chronic HS). On the first and last day, 6 dairy goats in each group were randomly selected to collect rumen liquid after the morning feeding through oral stomach tubes. The barn temperature and humidity were recorded every day. Results: Disruption of the rumen microbiome was observed under chronic HS, represented by an increase in the abundance of Prevotella and Bacteroidales (p<0.05), and upregulation of carbohydrate transport and metabolism functions (p<0.05). Additionally, the abundance of Succinimonas and Ruminobacter in chronic HS is lower than in acute HS (p<0.05), and the functions of intracellular trafficking, secretion and vesicular transport, and the cytoskeleton were downregulated (p<0.05). Conclusion: The HS affected the interaction between the microbiota and host, thereby regulated milk production in dairy goats. These findings increased understanding of the crosstalk between hosts and bacteria.

Keywords

Acknowledgement

This work is supported by the National Key Research and Development Program of China (2022YFD1301001) and the China Agricultural Research System (CARS-36).

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