努利虫疠霉感染桃蚜过程的扫描电镜观察

›› 2007, Vol. 50 ›› Issue (2): 202-206.

• 研究论文 • 上一篇

努利虫疠霉感染桃蚜过程的扫描电镜观察

李伟，甘雅玲，盛承发^*

（中国海洋大学生命科学与技术学部，山东青岛266003）

出版日期:2007-03-08 发布日期:2007-11-20
通讯作者: 盛承发

Invasive processes of Pandora nouryi (Remaudière & Hennebert) Humber in green peach aphid Myzus persicae (Sulzer) observed with scanning electronic microscopy

LI Wei, GAN Ya-Ling, SHENG Cheng-Fa

(Department of Life Science and Technology, Ocean University of China, Qingdao, Shandong 266003, China)

Online:2007-03-08 Published:2007-11-20
Contact: SHENG Cheng-Fa

摘要/Abstract

摘要： 利用扫描电镜观察了努利虫疠霉Pandora nouryi (Remaudière & Hennebert) Humber初生分生孢子接种桃蚜Myzus persicae (Sulzer)后孢子萌发、入侵以及菌体突破虫体的整个侵染过程。结果表明：附着于虫体表面的初生分生孢子在3～5 h后即有60%以上的萌发率，萌发的孢子形成芽管或产生球形或棍棒状的附着胞；12 h后大部分孢子均已萌发，并成功入侵寄主虫体；接种60 h后，呈掌状分枝的假根首先从桃蚜胸部的腹面突破虫体长出体外，明显区别于新蚜虫疠霉Pandora neoaphidis (Remaudière & Hennebert) Humber假根突破虫体的位置；假囊状体不多见，且仅分布于蚜虫身体两侧，这可在一定程度上解释努利虫疠霉产孢对湿度条件要求较高的生物学现象。

关键词: 努利虫疠霉, 桃蚜, 感染过程, 接种, 扫描电镜

Abstract: The invasive processes of Pandora nouryi (Remaudière & Hennebert) Humber in the host aphid Myzus persicae (Sulzer) was observed with scanning electronic microscopy. It was found that the conidia attached to the surface of aphid germinated rapidly. About 60% conidia germinated to germ tube or globose appressorium for invasion within 3－5 h after attachment. By 12 h after attachment almost all conidia had germinated and invaded into the host successfully. By 60 h postinoculation the digital rhizoids were the first structures to emerge from the breast region of aphid body, attaching the host to the plant. Few pseudocystidia were found and just distributed at the two sides of aphid body, which may explain why existence of more moisture conditions is necessary for free discharge of conidial sporulation from cadavers killed by P. nouryi.

Key words: Pandora nouryi, Myzus persicae, invasive process, inoculation, scanning electronic microscopy

李伟，甘雅玲，盛承发^*. 努利虫疠霉感染桃蚜过程的扫描电镜观察[J]. , 2007, 50(2): 202-206.

LI Wei, GAN Ya-Ling, SHENG Cheng-Fa. Invasive processes of Pandora nouryi (Remaudière & Hennebert) Humber in green peach aphid Myzus persicae (Sulzer) observed with scanning electronic microscopy[J]. , 2007, 50(2): 202-206.

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努利虫疠霉感染桃蚜过程的扫描电镜观察

Invasive processes of Pandora nouryi (Remaudière & Hennebert) Humber in green peach aphid Myzus persicae (Sulzer) observed with scanning electronic microscopy

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