Subtropical Plant Science ›› 2022, Vol. 51 ›› Issue (6): 497-504.DOI: 10.3969/j.issn.1009-7791.2022.06.011

• Plant protection • Previous Articles     Next Articles

UV-B Stress Increases Resistance of Spodoptera litura to Metarhizium anisopliae

HUANG Yuan-yuan1, WANG Ming-hui1, HE Li-yan1, XIONG Ze-en1, CHEN Jie1, Shaukat ALI 1, MENG Jian-yu2*, SANG Wen1*   

  1. (1. College of Plant Protection, South China Agricultural University / Engineering Research Center of Biological Control, Ministry of Education, Guangzhou 510640, Guangdong China; 2. Guizhou Institute of Tobacco Science Research, Guiyang 550081, Guizhou China)
  • Received:2022-11-02 Accepted:2022-12-02 Published:2023-03-28
  • Contact: MENG Jian-yu

UV-B胁迫提高斜纹夜蛾对绿僵菌的抗性研究

黄圆圆1,王明慧1,何丽艳1,熊泽恩1,陈 洁1,Shaukat ALI1,孟建玉2*,桑 文1*   

  1. (1. 华南农业大学植物保护学院 / 生物防治教育部工程研究中心,广东 广州 510640;2. 贵州省烟草科学研究院,贵州 贵阳 550081)
  • 通讯作者: 孟建玉
  • 基金资助:
    中国烟草总公司贵州省公司项目(2021XM09);广州市科技计划项目(202206010042);“十四五”广东省农业科技创新十大主攻方向——柑橘黄龙病综合防控技术(2022SDZG06);广东省现代农业产业技术体系创新团队建设专项(2022KJ108)

Abstract: Metarhizium anisopliae is a broad spectrum insect pathogen, which can be used as a fungal insecticide to control various insect pests. The interaction between M. anisopliae and insects is very complex, and various factors may affect its infection effect. In this study, a strain of M. anisopliae with good insecticidal effect was obtained. The mortality, haemocyte number in haemolymph, phagocytosis and anti-fungal activity in plasma were analyzed in fungal infected Spodoptera litoptera after UV-B stress treatment. The results showed that within 4 to 8 h after treatment (UV-B stress for 0.5 h followed by infection with M. anisopliae), there was a significant increase in indicators related to the immune response. These results indicated that the sensitivity of insects to entomopathogenic fungi was affected by UV-B stress, and UV-B could change the immune response of insects, making them resistant to pathogenic fungi.

Key words: UV-B; Metarhizium anisopliae; Spodoptera litura; mortality; immune response

摘要: 金龟子绿僵菌(Metarhizium anisopliae)是一种广谱的昆虫病原菌,可作为真菌杀虫剂防治多种害虫。绿僵菌与昆虫的相互作用十分复杂,诸多因素均可影响其侵染效果。本研究筛选出一株对斜纹夜蛾(Spodoptera litoptera)有较好杀虫效果的绿僵菌菌株,随后分析紫外线-B (UV-B)胁迫处理的斜纹夜蛾被真菌感染后的死亡率、血细胞数量、体内吞噬作用、血浆抗真菌活性等。结果表明,UV-B前期照射能显著降低斜纹夜蛾幼虫被绿僵菌侵染的死亡率。UV-B照射斜纹夜蛾幼虫0.5 h后用绿僵菌侵染处理4~8 h,免疫反应相关的指标明显增加。说明昆虫对昆虫病原真菌的敏感性受紫外线胁迫的影响,紫外线能改变昆虫体内的免疫反应,促使昆虫抵御病原真菌的侵染。

关键词: UV-B, 绿僵菌, 斜纹夜蛾, 死亡率, 免疫反应

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