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中国农学通报 ›› 2019, Vol. 35 ›› Issue (5): 160-164.doi: 10.11924/j.issn.1000-6850.casb18030058

所属专题: 生物技术

• 畜牧 动物医学 蚕 蜂 • 上一篇    

喂食细菌对家蚕血淋巴酚氧化酶活性及其基因表达的影响

杨伟克, 唐芬芬, 刘增虎, 钟健, 董占鹏   

  1. 云南省农业科学院蚕桑蜜蜂研究所
  • 收稿日期:2018-03-12 修回日期:2019-01-10 接受日期:2018-04-24 出版日期:2019-02-13 发布日期:2019-02-13
  • 通讯作者: 董占鹏
  • 基金资助:
    国家自然科学基金地区基金项目“云南琥珀茧色形成机理研究”(31360586);云南省现代农业蚕桑产业技术体系建设项目“首席科学家经 费”(2013K-JTX006)。

Feeding Bacteria: Effect on Phenoloxidase Activity and Its Gene Expression in Hemolymph of Bombyx mori

  • Received:2018-03-12 Revised:2019-01-10 Accepted:2018-04-24 Online:2019-02-13 Published:2019-02-13

摘要: [目的]为研究细菌刺激后,家蚕血淋巴酚氧化酶活性及其基因表达变化情况,[方法]利用实时荧光定量PCR的方法检测了喂食大肠杆菌和金黄色葡萄球菌后不同时间(6、12、24、48h)酚氧化酶原基因PPO1和PPO2的表达情况,同时测定了酚氧化酶的活性。[结果]喂食两种细菌6h、12h和24h,家蚕血淋巴中PPO1和PPO2基因上调表达,酚氧化酶活性显著高于对照组。喂食革兰氏阴性菌大肠杆菌后,PPO1和PPO2基因相对表达量及酚氧化酶活性在12h达到最高值,而喂食革兰氏阳性菌金黄色葡萄球菌在24h达到最高值。[结论]家蚕感染革兰氏阳性菌和革兰氏阴性菌,酚氧化酶活性及其基因表达存在一定差异,暗示感染不同细菌后诱发的家蚕免疫机制并不完全相同。。

关键词: 玛咖, 玛咖, 相关分析, 通径分析

Abstract: To investigate the effect of bacteria infection on phenoloxidase activity and its gene expression in hemolymph of Bombyx mori, the real-time fluorescent quantitative PCR is applied to detect the expression of PPO1 and PPO2 in different time (6、12、24、48 h) after feeding Escherichia coli and Staphylococcus aureus, meanwhile the phenoloxidase activity is determined. The results showed that the expression of PPO1 and PPO2 increased at 6 h, 12 h and 24 h after oral infection with the two bacteria, the phenoloxidase activity was significantly higher than that of the control. In addition, the gene expression of PPO1 and PPO2 and the phenoloxidase activity reached peaks at 12 h after Escherichia coli infection, while they reached peaks at 24 h after Staphylococcus aureus infection. The phenoloxidase activity and gene expression were different after Gram positive bacteria and Gram negative bacteria infection, indicating that the immune mechanisms of silkworm induced by different bacteria were different.