Effects on growth performance and immunity of Monopterus albus after high temperature stress

文献类型： 外文期刊

第一作者： Mao, Yifan

作者： Mao, Yifan;Li, Mingyou;Lv, Weiwei;Huang, Weiwei;Yuan, Quan;Yang, Hang;Zhou, Wenzong

作者机构：

关键词： Monopterus albus; high temperature stress; immunity; liver; intestinal microorganisms

期刊名称：FRONTIERS IN PHYSIOLOGY （ 影响因子：4.0； 五年影响因子：4.7 ）

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年卷期： 2024 年 15 卷

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收录情况： SCI

摘要： To investigate the impact of the effect of high temperature stimulation on Monopterus albus larvae after a certain period of time, five experimental groups were established at different temperatures. Then, the M. albus under high temperature stress was fed at 30 degrees C for 70 days. After that, the growth index of the M. albus was counted and analyzed. In terms of growth index, high temperature stress had significant effects on FCR, FBW, WGR, and SGR of M. albus (p < 0.05). The SR increased after being stimulated by temperature (p < 0.1). The study revealed that liver cells of M. albus were harmed by elevated temperatures of 36 degrees C and 38 degrees C. In the experimental group, the activities of digestive enzymes changed in the same trend, reaching the highest point in the 32 degrees C group and then decreasing, and the AMS activity in the 38 degrees C group was significantly different from that in the 30 degrees C group (p < 0.05). The activities of antioxidase in liver reached the highest at 34 degrees C, which was significantly different from those at 30 degrees C (p < 0.05). In addition, the expression levels of TLR1, C3, TNF-alpha, and other genes increased in the experimental group, reaching the highest point at 34 degrees C, and the expression level of the IL-1 beta gene reached the highest point at 32 degrees C, which was significantly different from that at 30 degrees C (p < 0.05). However, the expression level of the IRAK3 gene decreased in the experimental group and reached its lowest point at 34 degrees C (p < 0.05). The expression level of the HSP90 alpha gene increased with the highest temperature stimulus and reached its highest point at 38 degrees C (p < 0.05). In the alpha diversity index of intestinal microorganisms in the experimental group, the observed species, Shannon, and Chao1 indexes in the 34 degrees C group were the highest (p < 0.05), and beta diversity analysis revealed that the intestinal microbial community in the experimental group was separated after high temperature stimulation. At the phylum level, the three dominant flora are Proteus, Firmicutes, and Bacteroides. Bacteroides and Macrococcus abundance increased at the genus level, but Vibrio and Aeromonas abundance decreased. To sum up, appropriate high-temperature stress can enhance the immunity and adaptability of M. albus. These results show that the high temperature stimulation of 32 degrees C-34 degrees C is beneficial to the industrial culture of M. albus.

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