ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2018, Vol. 49 ›› Issue (11): 2359-2370.doi: 10.11843/j.issn.0366-6964.2018.11.007

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Transcriptome Reveals the Adapting Mechanism of Colon Tissues of Bactrian Camel in Water-deficient Environment

LING Yu, QI Yu, CAO Jun-wei, WANG Shen-yuan, ZHOU Huan-min, ZHANG Yan-ru*   

  1. College of Life Sciences, Inner Mongolia Agricultural University, Hohhot 010019, China
  • Received:2018-06-08 Online:2018-11-23 Published:2019-01-23

Abstract:

The aim of this study was to understand the mechanism of tissue environmental adaptation in the absence of water in Camelus. In this study, six 6-9 years old adult Alashan Bactrian camels were randomly divided into 2 groups, the first group was the control group (colon1_3), in which the animals were fed with normal feed and water, the second group was the no drinking water group (colon3), in which the animals were in the absence of water for 24 d, other treatment (forage) was the same as the control group. The Illumina HiSeq 2000 sequencing platform was used to sequence the transcriptome of Bactrian camel colon tissue in the control and no drinking water groups, and the transcriptome data were used to perform quality-controlled, alignment, differentially expressed, GO and KEGG analysis. The results showed that, compared with control group, a total of 2 122 differentially expressed genes were obtained in the no drinking water group, among which 813 genes were up-regulated and 1 309 genes were down-regulated. GO enrichment analysis results showed that 30 terms in the no drinking water group were significantly enriched by down-regulated expression genes. There was no statistically significant enrichment term by the up-regulated expression genes. The KEGG pathway analysis showed that the down-regulated expression genes in no drinking water group were significantly enriched in multiply pathways, including spliceosome, protein export, protein processing in endoplasmic reticulum, RNA transport, ribosome biogenesis in eukaryotes, mRNA detection, RNA degradation metabolic pathways. The up-regulated expression genes in no drinking water group were enriched in focal adhesion, lysosome function, and so on. The results of this study indicate that the number of down-regulated expression genes in colon are more than up-regulated expressed genes in water-deficient environments, and the functions of these down-regulated expression genes are mainly associated with RNA processes and protein synthesis pathways. These genes are favorable for camels to reduce the RNA synthesis and the metabolic rate of colon tissue in water-deficient environments.

Key words: bactrian camel, colon, transcriptome, water metabolism

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