LIU Xiangdong,ZHANG Yuanchen.Infection pattern and dynamics of endosymbionts in aphids and their effects on population differentiation of hosts[J].Journal of Nanjing Agricultural University,2018,41(2):209-217.[doi:10.7685/jnau.201709009]





Infection pattern and dynamics of endosymbionts in aphids and their effects on population differentiation of hosts
刘向东 张元臣
南京农业大学昆虫学系, 江苏 南京 210095
LIU Xiangdong ZHANG Yuanchen
Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China
endosymbiontdiversitypopulation densityenvironmental stresshost useinterrelation
Infection with endosymbiont is very common in aphid populations. Endosymbionts play key roles in determining survival,reproduction and responses to environmental stress of aphids. The endosymbiont species and infection patterns are various in aphids. The diversity of endosymbionts is advantageous for aphids to deal with different environmental conditions. Endosymbionts parasitize insect hosts. The species and population fluctuations of endosymbionts are determined by several factors including genetic background and fitness of insect hosts and environmental stress. Endosymbionts can synthesize essential substances for host aphids,digest plant tissues and neutralize plant toxins. Consequently,host utilization of insects might be affected by endosymbionts. It has been revealed that the primary and secondary endosymbionts could result in host shift of aphids,and confer the ability on aphids to use a novel host plant which they naturally cannot use. Therefore,the endosymbionts promote the population differentiation of aphids. Co-infection of endosymbionts is found in aphids. Interspecific relations between endosymbionts will affect the population dynamics and roles of endosymbionts. The study on relations among aphid-endosymbiont-host plant at community level will be attracting more and more attention from researchers.


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