| modestobacter versicolor sp. nov., an actinobacterium from biological soil crusts that produces melanins under oligotrophy, with emended descriptions of the genus modestobacter and modestobacter multiseptatus mevs et al. 2000. | a novel isolate, cp153-2(t), was obtained from topsoil biological crusts in the colorado plateau (usa). colonies were black in colour due to melanin-like pigments when grown on oligotrophic medium, but not when grown on copiotrophic medium. induction of melanogenesis was independent of growth phase or illumination conditions, including exposure to uvb and uva radiation, but exposure to uvb could enhance total pigment production and growth under low nitrogen prevented its synthesis. this mode of ... | 2007 | 17766865 |