Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (2): 329-336.DOI: 10.3969/j.issn.1004-1524.2022.02.14

• Plant Protection • Previous Articles     Next Articles

Cloning and expression analysis of AgoATPb gene in cotton-melon aphid, Aphis gossypi

YANG Weijun1,2(), DONG Yanlei1, WU Qiufang1,2, ZHANG Meiling1,2, HAN Libin1,2, ZHANG Yuanchen1,2,*()   

  1. 1. College of Biological and Food Engineering, Anyang Institude of Technology, Anyang 455000, Henan, China
    2. Taihang Mountain, Forest Pests Observation and Research Station of Henan Province, Linzhou 456550, Henan, China
  • Received:2021-08-03 Online:2022-02-25 Published:2022-03-02
  • Contact: ZHANG Yuanchen

Abstract:

To evaluate the effects of tissue, age and host plant on expression of ATP synthase subunit B gene (AgoATPb) of Aphis gossypii, cotton aphid was taken as the research object, full-length cDNA sequence of AgoATPb gene was obtained by RT-PCR and RACE (rapid amplification cDNA ends) technology, and the bioinformatics analysis was carried out using online tools such as Expasy and SignalP-4.0 Server. Expression level of AgoATPb gene was also studied by real-time quantitative PCR technology in different tissues and different day ages of cotton aphid and when feeding on different plants. Full-length cDNA sequence of AgoATPb gene was 1 247 bp, and its open reading frame (ORF) was 822 bp, encoding 273 amino acids. The 5' noncoding region and 3' noncoding region of AgoATPb gene were 128 bp and 297 bp, respectively. Theoretical molecular weight and isoelectric point of amino acid sequence coded by AgoATPb gene were 31.40 ku and 8.95, respectively. There were no signal peptide and no transmembrane region in AgoATPb.Amino acid sequence analysis showed that the sequence identity of AgoATPb with the homologous protein from other insect were between 47% and 99%. Apart from not expressed in the embryonic stage, AgoATPb gene was transcribed throughout all developmental stages and tissues of A. gossypii, but expression levels significantly differed among the developmental stages and among the different tissues. After feeding on different plants, the highest levels of AgoATPb expression were observed on cotton, followed by cucumber and zucchin, and the lowest expression levels was observed on melon. It was speculated that AgoATPb gene might be related to adaptation of cotton aphids to host plants.

Key words: cotton aphid, ATP synthase subunit B, bioinformatics, gene cloning, host

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