Effects of different doses of electron beam irradiation on bacterial community of Portunus trituberculatus

Abstract

Electron beam irradiation (EBI) can effectively kill microorganisms that cause food decay and thus, prolong the shelf life of food. However, different doses of EBI on the impact of Portunus trituberculatus microbial community structure remain to be seen. This study adopted high-throughput sequencing technologies to compare the effect of different doses of EBI on the microbial community structure of the swimming crab and found that the crab microbial community structure was changed significantly upon treatment with different doses of EBI. We combined alpha and beta diversity analysis, relative abundance analysis of species, and linear discriminant analysis effect size analysis, and our results focused on Psychrilyobacter, Clostridium, Vagococcus, Psychrobacter, and Carnobacterium. In addition, the richness and diversity of microorganisms initially decreased and then increased with the increasing of radiation dose. The results showed that the minimum dose of EBI was 6 kGy. This study provides a theoretical basis for the preservation of crabs.