Metabolomic analysis of Apis cerana cerana in the Changbai Mountain during the overwintering period based on liquid chromatography mass spectrometry
Author of the article:LIU Nan-Nan1** XING Li1 SAN Zhi-Hao1 WANG Jing2 LIU Li-Ying3***
Author's Workplace:1. Jilin Agricultural Science and Technology University, Jilin 132101, China; 2. Mudanjiang Branch of Heilongjiang Academy of Agricultural Science, Mudanjiang 157000, China; 3. Liaoning Agricultural Vocational and Technical College, Yingkou 115009, China
Key Words: Apis cerana cerana in Changbai Mountain; overwintering; metabolomics methods; liquid chromatography mass spectrometry; cold-resistence
Abstract:
[Aim] To investigate the metabolites and metabolic
pathways related to cold-resistance in the honeybee Apis cerana cerana,
an ecological type of A. cerana native to the Changbai Mountains, during
the overwintering period. [Methods] Changes in metabolites in the guts of
overwintering (December) and non-overwintering (August) honeybees were detected
using a non-targeted metabolomics methods based on liquid chromatography mass
spectrometry. [Results] 125 positive and 219 negative ion mode,
differentially expressed metabolites were detected in overwintering and
non-overwintering honeybees. Of these, 180 were upregulated and 164 were
downregulated. The VIP top 30 metabolites included various differential
metabolites, many of which appear related to reducing antioxidant damage,
antimicrobic activity, cold resistance, synthesis and the metabolism of
nutrients or energy substances, such as melatonin, isorhamnetin, delphinidin,
linoleic acid, Y-linolenic acid, quinolinic acid, kynurenine, thiamine,
pyridoxine, and syringin. The most significant difference was among the
positive and negative ion modes. In addition, the purine metabolism, pentose
phosphate pathway, glycosylphosphatidylinositol (GPI) anchor biosynthesis, as
well as the sulfur relay system, nicotinate and nicotinamide metabolism,
alanine, aspartic acid, and glutamate metabolism, were the most significantly
downregulated and upregulated KEGG pathways. Differential metabolites were
significantly enriched in KEGG pathways such as the purine metabolism, pentose
phosphate pathway, glycosylphosphatidylinositol (GPI) anchor biosynthesis,
sulfur relay system, nicotinate and nicotinamide metabolism, alanine, aspartic
acid, and glutamate metabolism. [Conclusion] A. c. cerana mainly responds to
overwintering stress by regulating its antioxidant metabolism, energy substance
synthesis and metabolic rate. These results shed light on the metabolic
characteristics and regulatory basis of cold-resistance in A. c. cerana in the Changbai Mountains.