河南农业科学 ›› 2021, Vol. 50 ›› Issue (9): 157-162.DOI: 10.15933/j.cnki.1004-3268.2021.09.019

• 畜牧·兽医 • 上一篇    下一篇

BmNPV对家蚕海藻糖酶活性及其基因表达的影响

唐芬芬1,杨伟克2,谢昆1,袁盛勇1,沈登荣1,何超1,张睿1,刘娜1   

  1. (1.红河学院生物科学与农学学院,云南蒙自661101;2.云南省农业科学院蚕桑蜜蜂研究所,云南蒙自661101)
  • 收稿日期:2021-03-03 出版日期:2021-09-15 发布日期:2021-10-13
  • 通讯作者: 谢昆(1975-),男,云南富民人,教授,博士,主要从事生物化学与分子生物学研究。E-mail:cfyjs_tg@163.com
  • 作者简介:唐芬芬(1985-),女,云南耿马人,副研究员,博士,主要从事家蚕病理与分子生物学研究。E-mail:tfflove1985@163.com
  • 基金资助:
    红河学院博士专项(BS2003);云南省农业科学院应用基础研究专项(YJM201710);国家自然科学基金项目(31760638);
    红河学院生物学重点建设学科资助项目(SZ1520)

Effect of BmNPV on the Activity of Trehalase and Its Gene Expression of Bombyx mori

TANG Fenfen1,YANG Weike2,XIE Kun1,YUAN Shengyong1,SHEN Dengrong1,HE Chao1,ZHANG Rui1,LIU Na1   

  1. (1.College of Biological and Agricultural Sciences,Honghe University,Mengzi 661101,China;2.Sericulture and Apiculture Research Institute,Yunnan Academy of Agricultural Sciences,Mengzi 661101,China)
  • Received:2021-03-03 Published:2021-09-15 Online:2021-10-13

摘要: 为了明确家蚕核型多角体病毒(Bombyx mori nuclear polyhedrovirus,BmNPV)对家蚕不同组织海藻糖酶活性及其基因BmTre 表达水平的影响,以五龄起蚕为试验材料,经口喂食BmNPV,分析血淋巴、脂肪体和中肠BmTre 基因及海藻糖酶活性的变化情况。结果显示,家蚕血淋巴、脂肪体和中肠BmTre 均在感染BmNPV 前期或中期开始上调表达,感染后期呈下调表达趋势。血淋巴海藻糖酶活性在感染BmNPV后6 h开始显著高于对照组,9 h达到最高值,为对照组的2.2倍;在24 h酶活性开始降低,48 h酶活性极显著低于对照组。中肠海藻糖酶活性从3 h开始显著增加,在6 h和9 h持续升高;在12 h酶活性开始降低,24 h和48 h海藻糖酶活性均极显著低于对照组。脂肪体海藻糖酶活性在9 h开始增加,12 h和24 h均持续高于对照组,在48 h酶活性降低至对照组的21%,差异达到极显著水平。综合分析可知,经口喂食BmNPV后,家蚕BmTre 基因的表达水平与海藻糖酶活性变化趋势一致,提示海藻糖酶可能作为一类免疫效应因子参与家蚕抵御病毒的侵染过程。

关键词: 家蚕, 家蚕核型多角体病毒, 组织, 海藻糖酶, 酶活性, 基因表达

Abstract: In order to clarify the effect of Bombyx mori nuclear polyhedrovirus(BmNPV)on the trehalase activity and the BmTre expression in different tissues of silkworm,with the fifth instar silkworm as test materials,the BmTre expression and trehalose activity were analyzed in hemolymph,fat body and midgut after oral infection with BmNPV.The results showed that the expression of BmTre in the hemolymph,fat body and midgut of silkworm began to be up⁃regulated in the early⁃ or mid⁃stage and showed a downward⁃regulated expression trend in the later stage after infection with BmNPV.The trehalase activity was significantly higher than that of the control group at 6 h in hemolymph after BmNPV infection and reached the highest value at 9 h,which was 2.2 times that of the control group. However,the enzyme activity began to decrease at 24 h and was significantly lower than the control group at 48 h.In midgut,the activity of trehalase,which was increased significantly from 3 h and continued to increaseat 6 h and 9 h,began to decrease at 12 h.The trehalase activity was significantly lower than that of the control group at 24 h and 48 h after infection with BmNPV. The trehalase activity in fat body began to increase at 9 h and was consistently higher than the control group at 12 h and 24 h.However,the enzyme activity decreased to 21% of that of the control group at 48 h and the difference reached an extremely significant level.In conclusion,the BmTre expression level is consistent with the change of trehalase activity in silkworm after oral infection with BmNPV,which suggests that the trehalase may be participated in the process of silkworm resisting virus infection as a kind of immune effector.

Key words: Bombyx mori, Bombyx mori nuclear polyhedrovirus, Tissue, Trehalase, Enzymatic activity, Gene expression

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