title: The mechanism controlling phenotypic plasticity of body color in the desert locust: some recent progress.
abstract: Schistocerca gregaria exhibits density-dependent body color polyphenism. Nymphs occurring at low population densities show green-brown polyphenism. They show phase polyphenism and develop black patterns at high population densities. Recent studies suggest a third type of polyphensim, that is, homochromy, a response to background color. Laboratory experiments that considered homochromy suggest that humidity is not directly involved in green-brown polyphenism and that odor from other individuals does not induce black patterns. Black patterns can be induced in isolated nymphs by video images of locusts and tadpoles. Juvenile hormone and [His7]-corazonin control body color in locusts. The gene encoding the latter has been identified for S. gregaria and Locusta migratoria, and its key role in controlling black patterning has been demonstrated.
authors.affiliation: National Agriculture and Food Research Organization (NAFO), Institute of Agro-biological Sciences, Ohwashi 1-2, Tsukuba, Ibaraki 305-8634, Japan. Electronic address: stanaka117@yahoo.co.jp.
authors.forename: Seiji
authors.initials: S
authors.lastname: Tanaka
authors.affiliation: Brain Science Institute, Faculty of Agriculture, Tamagawa University, Machida City, Tokyo 194-8610, Japan.
authors.forename: Ken-Ichi
authors.initials: KI
authors.lastname: Harano
authors.affiliation: National Agriculture and Food Research Organization (NAFO), Institute of Agro-biological Sciences, Ohwashi 1-2, Tsukuba, Ibaraki 305-8634, Japan.
authors.forename: Yudai
authors.initials: Y
authors.lastname: Nishide
authors.affiliation: National Agriculture and Food Research Organization (NAFO), Institute of Agro-biological Sciences, Ohwashi 1-2, Tsukuba, Ibaraki 305-8634, Japan.
authors.forename: Ryohei
authors.initials: R
authors.lastname: Sugahara
mesh_terms: D000818:Animals; D048188:Locusta migratoria / Q000033:anatomy & histology / Q000502:physiology*; D009758:Nymph; D010858:Pigmentation; D011156:Population Density