Journal of Integrative Agriculture ›› 2025, Vol. 24 ›› Issue (7): 2719-2731.DOI: 10.1016/j.jia.2024.09.021

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烟粉虱MED隐种中温度胁迫相关microRNAs的特征和功能分析

  

  • 收稿日期:2024-07-02 修回日期:2024-09-24 接受日期:2024-08-23 出版日期:2025-07-20 发布日期:2025-06-17

Characterization and functions of temperature stress-associated microRNAs in invasive insect Bemisia tabaci Mediterranean cryptic species

Xiaona Shen1, 2, Jianyang Guo2, Fanghao Wan2, Zhichuang Lü2#, Jianying Guo2#, Wanxue Liu2   

  1. 1 Department of Basic Medicine, Changzhi Medical College, Changzhi 046000, 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

  • Received:2024-07-02 Revised:2024-09-24 Accepted:2024-08-23 Online:2025-07-20 Published:2025-06-17
  • About author:#Correspondence Zhichuang Lü, E-mail: lvzhichuang@caas.cn; Jianying Guo, E-mail: guojianying@caas.cn
  • Supported by:

    This work was funded by the National Natural Science Foundation of China (32072494), the Fundamental Research Program of Shanxi Province, China (202203021212165) and the Shanxi Province Higher Education Technology Innovation Project, China (2022L363).

摘要:

随着当前国际贸易的发展和人员的频繁交流,生物入侵在全球范围内正呈现快速增长趋势。昆虫是变温动物,它们的地理分布很大程度上取决于温度耐受性的强弱。为了研究入侵种烟粉虱MED隐种的温度响应机制,我们采用miRNA-seq技术分别对三个具有不同环境温度条件的烟粉虱田间种群(吐鲁番哈尔滨和海口市进行sRNA高通量测序。结果表明在烟粉虱MED隐种中存在12个响应温度胁迫并发生差异表达的miRNA其中Bta-miR-998Bta-miR-129与温度耐受性相关。此外,我们预测并验证了Bta-miR-998Bta-miR-129靶基因中与耐温性相关的靶基因。结果显示高温种群中Bta-miR-129表达量降低,靶基因BtMGAT3表达增加并导致其耐热性提升。而低温种群中Bta-miR-129表达量增加,靶基因BtRGS7表达显著下调并使其耐寒性显著提升。本研究结果表明miRNA调控基因表达的调节方式是烟粉虱MED隐种中重要的温度响应机制揭示了miRNA在昆虫温度响应中的重要调节作用,为研究miRNA对昆虫基因表达的调节提供了新的途径。

Abstract:

With the development of international trade and frequent personnel exchanges, biological invasion is showing a rapidly growing trend worldwide.  Insects are ectothermic animals, so their geographical distribution is due largely to their high and low temperature tolerances.  To study the temperature response mechanisms of Bemisia tabaci Mediterranean cryptic species (MED), miRNA-seq technology was used to unravel the miRNA library of Btabaci MED in three field populations (TP, HB, and HK) from cities with different environmental temperatures.  We identified 12 differentially expressed miRNAs in response to temperature stress, and Bta-miR-998 and Bta-miR-129 were shown to be associated with temperature tolerance.  In addition, we predicted and verified the target genes associated with the temperature tolerance imparted by Bta-miR-998 and Bta-miR-129.  The results showed that the down-regulated target gene of Bta-miR-129, BtMGAT3, significantly reduced the heat tolerance and another down-regulated target gene, BtRGS7, affected the cold tolerance of Btabaci MED.  These results indicate that gene expression regulated by miRNAs is an important temperature response mechanism in Btabaci MED.  This study reveals the important regulatory role of miRNA in insect temperature adaptation and provides a new avenue for studying the regulation of insect gene expression by miRNA


Key words: miRNA , invasive insects ,  temperature stress ,  response mechanisms