title: Microsporidia-insect host interactions: teratoid sporogony at the sites of host tissue melanization.
abstract: Microsporidia Paranosema locustae and Paranosema grylli infect fat bodies of orthopteran hosts Locusta migratoria and Gryllus bimaculatus, respectively, and cause formation of nodules consisting of deposits of melanin around heavily infected cells. Both species sporadically produce enlarged or malformed (teratoid) spores as a result of abnormal sporogony. Proportions of teratospores within melanized nodules were 6-10 times higher than in surrounding non-melanized tissues. The increased numbers of teratoid microsporidian spores within melanized regions may indicate the deteriorating effect of melanin metabolites on spore morphogenesis.
authors.affiliation: Laboratory of Microbiological Control, All-Russian Institute for Plant Protection, Podbelskogo 3, 196608, St. Petersburg-Pushkin, Russia. jumacro@yahoo.com <jumacro@yahoo.com>
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Tokarev
authors.forename: Yuliya Y
authors.initials: YY
authors.lastname: Sokolova
authors.forename: Rolf
authors.initials: R
authors.lastname: Entzeroth
mesh_terms: D000818:Animals; D016817:Apansporoblastina / Q000502:physiology*; D006135:Gryllidae / Q000033:anatomy & histology / Q000382:microbiology*; D048188:Locusta migratoria / Q000033:anatomy & histology / Q000382:microbiology*; D008543:Melanins / Q000378:metabolism*; D013172:Spores, Fungal / Q000254:growth & development
chemical_list: D008543:Melanins