RT Journal Article SR Electronic(1) A1 Whittenbury, R. A1 Davies, Stephanie L. A1 Davey, J. F.YR 1970 T1 Exospores and Cysts Formed by Methane-utilizing Bacteria JF Microbiology, VO 61 IS 2 SP 219 OP 226 DO https://doi.org/10.1099/00221287-61-2-219 PB Microbiology Society, SN 1465-2080, AB SUMMERY: Three varieties of resting stage, an exospore and two types of cyst, were formed by methane-utilizing bacteria. Exospores were budded off by two types of organism, both of which underwent a change in morphology prior to spore formation. Exospores possessed some properties in common with endospores: staining properties, some structural features, mode of germination, desiccation and heat resistance, but contained no detectable dipicolinic acid. Some organisms formed desiccation-resistant cysts similar in morphology, staining properties and fine structure to cysts formed by Azotobacter species. Other strains formed non-desiccation-resistant bodies considered to be similar to immature azotobacter-type cysts. A desiccation-resistant cyst formed by one strain differed in structure and appearance from Azotobacter-type cysts and was referred to as a Tipid’ cyst., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-61-2-219