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中国生物防治学报 ›› 2026, Vol. 42 ›› Issue (5): 1087-1095.DOI: 10.16409/j.cnki.2095-039x.2026.01.001

• 研究论文 • 上一篇    

LmFKBP35基因对飞蝗Toll通路调控作用及对金龟子绿僵菌侵染的影响

黄蕾1,2, 杨文静1,2, 张靖涵2, 王晓玲3, 李健美4, 娜木日嘎4, 闫冲5, 刘文强5, 殷怡婷2, 涂雄兵2, 王广君2, 常静1   

  1. 1. 内蒙古农业大学园艺与植物保护学院, 呼和浩特 010018;
    2. 中国农业科学院植物保护研究所/植物病虫害综合治理全国重点实验室, 北京 100193;
    3. 锡林郭勒盟农牧技术推广中心, 锡林郭勒 026000;
    4. 锡林郭勒盟草原工作站, 锡林郭勒 026000;
    5. 巴彦淖尔市林业和草原局, 巴彦淖尔 015006
  • 收稿日期:2025-09-11 发布日期:2026-10-21
  • 通讯作者: 王广君,博士,副研究员,E-mail:wangguangjun@caas.cn;常静,博士,副教授,E-mail:changjing10220@sina.com。
  • 作者简介:黄蕾,硕士,E-mail:huanglei9371@163.com。
  • 基金资助:
    国家重点研发计划(2023YFE0100100);现代农业技术产业体系(CARS-34-18);中央公益性科研机构基础研究基金(S2026XM03,S2025XM04)

The Regulation of LmFKBP35 on Toll Pathway of Locusts migratoria and Its Effect on the Infection of Metarhizium anisopliae

HANG Lei1,2, YANG Wenjing1,2, ZHANG Jinghan2, WANG Xiaoling3, LI Jianmei4, NAMU Riga4, YAN Chong5, LIU Wenqiang5, YIN Yiting2, TU Xiongbing2, WANG Guangjun2, CHANG Jing1   

  1. 1. College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Hohhot 010019, China;
    2. State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    3. Xilingol League Agricultural and Animal Husbandry Technology Promotion Center, Xilinhot 026000, China;
    4. Xilingol League Grassland Workstation, Xilinhot 026000, China;
    5. Bayannur Forestry and Grassland Bureau, Bayannur 015006, China
  • Received:2025-09-11 Published:2026-10-21

摘要: FK506结合蛋白(FKBPs)是一类免疫亲和素,可以与免疫抑制剂FK506结合抑制生物体的免疫反应。LmFKBP35为飞蝗FKBPs蛋白家族中的一员,前期研究发现LmFKBP35与金龟子绿僵菌混合,可以增强绿僵菌对飞蝗的致病力。为进一步明确LmFKBP35基因的功能,本研究克隆了LmFKBP35基因,采用定量PCR技术,对金龟子绿僵菌侵染前后飞蝗中LmFKBP35基因表达量进行了测定;使用RNAi技术,干扰LmFKBP35后,测定了Toll通路中免疫相关基因表达情况以及对绿僵菌侵染的影响。研究结果表明,LmFKBP35基因编码区全长为987 bp,编码328个氨基酸,具有保守FKBP-C超家族结构域和TPR结构域,属于FKBP-C超家族成员;绿僵菌侵染后LmFKBP35基因表达量升高89%,与对照差异显著;对LmFKBP35干扰24 h后,其表达量较对照组显著降低,Toll通路相关基因spätzle、cactus和抗菌肽defensin表达量分别显著升高72%、47%和82%;干扰LmFKBP35后绿僵菌处理飞蝗,飞蝗的存活率与单独绿僵菌处理相比显著提高22%。据上述研究结果推测LmFKBP35基因可抑制飞蝗免疫,促进绿僵菌的侵染。

关键词: 飞蝗, LmFKBP35, 金龟子绿僵菌, 免疫机制

Abstract: FK506-binding proteins (FKBPs) are a kind of immunophilins that bind the immunosuppressant FK506 and inhibit immune responses. LmFKBP35, a member of the FKBPs family in the Locusta migratoria, was previously demonstrated to enhance the pathogenicity of Metarhizium anisopliae when they were mixed together. The function of the LmFKBP35 gene was clarified by cloning the gene and determining the expression of the gene in L. migratoria before and after infection with M. anisopliae by quantitative PCR (qPCR). Furthermore, employing RNA interference (RNAi), we investigated the influence of LmFKBP35 knockdown on the expression of immune-related genes in the Toll pathway and on M. anisopliae pathogenicity. The results showed that LmFKBP35 gene has a 987-bp coding sequence encoding a 328-amino acid protein containing conserved FKBP-C and TPR domains, confirming its membership in the FKBP-C superfamily. LmFKBP35 expression increased significantly by 89% after M. anisopliae infection. Twenty-four hours after RNAi knockdown, LmFKBP35 expression was significantly reduced by 92% compared to controls, while expression of spätzle, cactus, and defensin significantly increased by 72%, 47%, and 82%, respectively. When L. migratoria received simultaneous LmFKBP35 knockdown and M. anisopliae infection (via oral delivery), they exhibited a significantly higher survival rate (45%) compared to the control group (23%), representing a 22% increase. Based on the above results, it is inferred that the LmFKBP35 gene can suppresses the immune responses in L. migratoria.

Key words: Locusta migratoria, LmFKBP35, Metarhizium anisopliae, immune mechanism

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