Fukatsu T, Tsuchida T, Nikoh N, Koga R
National Institute of Bioscience and Human-Technology, Agency of Industrial Science and Technology, Tsukuba 305-8566, Japan.
Appl Environ Microbiol. 2001 Mar;67(3):1284-91. doi: 10.1128/AEM.67.3.1284-1291.2001.
From a laboratory strain of the pea aphid, Acyrthosiphon pisum, we discovered a previously unknown facultative endosymbiotic bacterium. Molecular phylogenetic analysis based on 16S ribosomal DNA revealed that the bacterium is a member of the genus Spiroplasma. The Spiroplasma organism showed stable vertical transmission through successive generations of the host. Injection of hemolymph from infected insects into uninfected insects established a stable infection in the recipients. The Spiroplasma symbiont exhibited negative effects on growth, reproduction, and longevity of the host, particularly in older adults. Of 58 clonal strains of A. pisum established from natural populations in central Japan, 4 strains possessed the Spiroplasma organism.
从豌豆蚜(Acyrthosiphon pisum)的一个实验室品系中,我们发现了一种此前未知的兼性内共生细菌。基于16S核糖体DNA的分子系统发育分析表明,该细菌是螺旋体属(Spiroplasma)的一个成员。这种螺旋体生物在宿主的连续世代中表现出稳定的垂直传播。将受感染昆虫的血淋巴注射到未受感染的昆虫中,能在受体中建立稳定的感染。这种螺旋体共生体对宿主的生长、繁殖和寿命产生负面影响,尤其是在老龄成虫中。从日本中部自然种群中建立的58个豌豆蚜克隆品系中,有4个品系含有这种螺旋体生物。