Upper boundary of the biosphere

Publisher Website
Google Scholar
Abstract
By using meterological rockets fitted with specially designed analyzers, samples for microbiological investigation have been taken. The analyzer design prevented extraneous microorganisms from penetrating into the analyzer. Before being used, analyzers were sterilized with high .gamma.-ray doses. For the 1st time microorganisms have been detected in the mesosphere at an altitude of 48-77 km. The microorganisms are microscopic fungi having black conidia or spores (Circinella muscae, Aspergillus niger, and Papulaspora anomala) and 1 sp. forming green conidia (Penicillium notatum). Colonies of Mycobacterium luteum and Micrococcus albus have grown. Five of the 6 spp. have synthesized pigments. Natural selection may be occurring in the mesophere because cells possessing chromogenous pigments (carotenoids and melanins) are more resistant to UV action. A greater number of microorganisms have been registered in the mesosphere during dust storms than in absence of strong winds.

This publication has 1 reference indexed in Scilit: