title: Role of host nutrition in symbiont regulation: impact of dietary nitrogen on proliferation of obligate and facultative bacterial endosymbionts of the pea aphid Acyrthosiphon pisum.
abstract: The impact of host nutrition on symbiont regulation in the pea aphid Acyrthosiphon pisum was investigated. The population density of the obligate symbiont Buchnera aphidicola positively correlated with dietary nitrogen levels. In contrast, the population density of the facultative symbiont Serratia symbiotica increased in aphids reared on low-nitrogen diets, indicating distinct regulatory mechanisms in the same insect host.
authors.affiliation: UCD School of Biology and Environmental Science, University College Dublin, Belfield, Dublin 4, Ireland. tom.wilkinson@ucd.ie
authors.forename: T L
authors.initials: TL
authors.lastname: Wilkinson
authors.forename: R
authors.initials: R
authors.lastname: Koga
authors.forename: T
authors.initials: T
authors.lastname: Fukatsu
mesh_terms: D000818:Animals; D001042:Aphids / Q000382:microbiology* / Q000502:physiology; D018407:Bacterial Physiological Phenomena; D009584:Nitrogen / Q000494:pharmacology*; D018532:Pisum sativum / Q000469:parasitology; D012705:Serratia / Q000502:physiology*; D013559:Symbiosis / Q000502:physiology*
chemical_list: D009584:Nitrogen