生物技术通报 ›› 2023, Vol. 39 ›› Issue (3): 254-266.doi: 10.13560/j.cnki.biotech.bull.1985.2022-0773

• 研究报告 • 上一篇    下一篇

最短尾短体线虫转录组及潜在效应蛋白分析

扈丽丽1,2(), 林柏荣2,3, 王宏洪4, 陈建松2,3, 廖金铃4(), 卓侃2,3()   

  1. 1.广东省森林培育与保护利用重点实验室 广东省林业科学研究院,广州 510520
    2.华南农业大学植物线虫研究室,广州 510642
    3.广东省微生物信号与病害防治重点实验室,广州 510642
    4.广东生态工程职业学院,广州 510520
  • 收稿日期:2022-06-25 出版日期:2023-03-26 发布日期:2023-04-10
  • 通讯作者: 廖金铃,男,博士,教授,研究方向:植物病原线虫学;E-mail: jlliao@scau.edu.cn
    卓侃,男,博士,教授,研究方向:植物病原线虫学;E-mail: zhuokan@scau.edu.cn
  • 作者简介:扈丽丽,女,博士,副研究员,研究方向:植物病原线虫学及林业有害生物综合防控;E-mail: hulili0113@163.com
  • 基金资助:
    国家自然科学基金项目(31401716);国家自然科学基金项目(31772136);国家自然科学基金项目(31672007)

Transcriptome and Candidate Effectors Analysis of Pratylenchus brachyurus

HU Li-li1,2(), LIN Bo-rong2,3, WANG Hong-hong4, CHEN Jian-song2,3, LIAO Jin-ling4(), ZHUO Kan2,3()   

  1. 1. Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou 510520
    2. Laboratory of Plant Nematology, South China Agricultural University, Guangzhou 510642
    3. Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Guangzhou 510642
    4. Guangdong Eco-Engineering Polytechnic, Guangzhou 510520
  • Received:2022-06-25 Published:2023-03-26 Online:2023-04-10

摘要:

最短尾短体线虫(Pratylenchus brachyurus)是一种重要的迁移性内寄生植物病原线虫。对其转录组进行测序和分析,是进一步研究其寄生特点和致病机理的重要基础。通过转录组测序和分析,得到72 516个unigenes,其中38 266个(52.76%)unigenes注释到7个蛋白质数据库中。Cazyme分析预测到 541 条具有植物/真菌细胞壁降解活性的蛋白质序列,分别属于 GH5、GH30、GH53、GH28、PL3、GH16、GH18和GH20家族。转录组中有56个蛋白序列与秀丽隐杆线虫(Caenorhabditis elegans)的RNAi通路蛋白具有同源性。鉴定到51个与已知植物寄生线虫效应蛋白具有同源性的蛋白序列,检测了9个潜在效应蛋白在抑制植物防卫反应中的作用,其中7个能够抑制由Gpa2/Rbp-1引起的细胞程序性死亡反应。研究结果表明最短尾短体线虫转录组与同属的短体线虫基因分布特点相似,其潜在效应蛋白具有抑制植物防卫反应的特点。

关键词: 最短尾短体线虫, 转录组, 效应蛋白, 细胞程序性死亡

Abstract:

Pratylenchus brachyurus is an important migratory endoparasitic phytopathogenic nematode. Analysis of the transcriptome is an important basis for further research on its parasitic characteristics and pathogenic mechanism. In the transcriptome of P. brachyurus, 72 516 unigenes were generated and 38 266(52.76%)unigenes were annotated against seven protein databases. In the carbohydrate-active enzymes analysis, 541 proteins were predicted to have plant/fungal cell wall degrading activities, and belonged to the families of GH5, GH30, GH53, GH28, PL3, GH16, GH18 and GH20 respectively. There were 56 protein sequences in the transcriptome demonstrating similarities with orthologues involved in RNAi pathway of Caenorhabditis elegans. Further analysis showed that 51 protein sequences with homology to known plant-parasitic nematode effector proteins were identified. Nine candidate effectors were selected and their potential ability in suppressing plant defense was tested. Seven of them suppressed programmed cell death(PCD)triggered by Gpa2/Rbp-1. The results revealed that the gene distribution characteristics of P. brachyurus were similar to of the same genus of Pratylenchus spp. The candidate effectors may play a critical role in suppressing plant defense.

Key words: Pratylenchus brachyurus, transcriptome, effector, programmed cell death