8) Koga, R., Tsuchida, T., Sakurai, M., Fukatsu, T. “Selective elimination of aphid endosymbionts: effects of antibiotic dose and host genotype, and fitness consequences.” FEMS microbiology Ecology 60, 229-239. （2007年）
7) Tsuchida, T., Koga, R., Sakurai, M., Fukatsu, T. “Facultative bacterial endosymbionts of three aphid species Aphis craccivora, Megoura crassicauda and Acyrthosiphon pisum, sympatrically found on the same host plants.” Applied Entomology and Zoology 41, 129-137. （2006年）
6) Sakurai, M., Koga, R., Tsuchida, T., Meng, X.Y., Fukatsu, T. “Rickettsia symbiont in the pea aphid Acyrthosiphon pisum: Novel cellular tropism, effect on host host fitness, and interaction with the essential symbiont Buchnera.” Applied and Environmental Microbiology 71, 4069-4075. （2005年）
5) Tsuchida, T., Koga, R., Meng, X.Y., Matsumoto, T., Fukatsu, T. “Characterization of a facultative endosymbiotic bacterium from the pea aphid Acyrthosiphon pisum.” Microbial Ecology 49, 126-133. （2005年）
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3) Koga R., Tsuchida T., Fukatsu T. “Changing partners in an obligate symbiosis: a facultative endosymbiont can compensate for loss of the essential endosymbiont Buchnera in an aphid.” Proceedings of the Royal Society of London Series B, 270: 2543-2550 (2003年)
2) Tsuchida T., Koga R., shibao H., Matsumoto T., Fukatsu T. “Diversity and geographic distribution of secondary endosymbiotic bacteria in natural population of the pea aphid, Acyrthosiphon pisum.” Molecular Ecology 11: 2123-2135. (2002年)
1) Fukatsu T., Tsuchida T., Nikoh N., Koga R. “Spiroplasma symbiont of the pea aphid, Acyrthosiphon pisum (Insecta: Homoptera).” Applied and Environmental Microbiology 67: 1284-1291. (2001年)
