Resistance of the termite, Coptotermes formosanus Shiraki to Metarhizium anisopliae due to grooming
Resistance of the termite, Coptotermes formosanus Shiraki to Metarhizium anisopliae due to grooming
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DOI：
10.1007/s10526-006-9020-x
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发表时间：
2007-02-01
期刊：
影响因子：
2.5
通讯作者：
Shimizu, S.
中科院分区：
文献类型：
--
作者：
Yanagawa, A.;Shimizu, S.
白蚁，Coptotermes formosanus，单独饲养，是高度敏感的昆虫病原真菌，金龟子绿僵菌，而白蚁饲养的群体是高度抵抗。当白蚁成组饲养时，用绿僵菌分生孢子处理过的白蚁，由其巢友梳理其体表，3 h内80%以上的分生孢子从表皮脱落。然而，单独饲养的白蚁体表分生孢子的数量并没有显著减少。在群体饲养的白蚁中，分生孢子在前肠、中肠和后肠中均有分布，而在个体饲养的白蚁中，分生孢子很少。分生孢子在消化道内不萌发，但仍有部分存活。结果，似乎从角质层去除异物，如真菌分生孢子，是白蚁相互梳理行为的一个功能，并且从角质层去除的分生孢子通过消化道消除。研究表明，相互理毛行为对保护这些白蚁免受绿僵菌感染非常有效。
Termites, Coptotermes formosanus, reared individually, were highly susceptible to the entomopathogenic fungus, Metarhizium anisopliae, while termites reared in groups were highly resistant. When reared in groups, the termites treated with M.anisopliae conidia on the body surface were groomed by their nestmates and more than 80% of the conidia were removed from the cuticle within 3 h. However, there was not a significant reduction in the numbers of conidia on the body surfaces of termites reared individually. For the termites maintained in groups, conidia were found in foreguts, midguts and hindguts, but very few conidia were detected in the guts of termites reared individually. Conidia in the alimentary tracts did not germinate, but some of were alive. As a result, it seems that the removal of foreign bodies, such as fungal conidia, from the cuticle is one function of termite mutual grooming behavior and that conidia removed from the cuticle are eliminated through alimentary tracts. This study indicates that mutual grooming behavior is very effective in protecting these termites from M.anisopliae infection.