Micromycetes from «Mir» space station: Resident or transientстатья
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Дата последнего поиска статьи во внешних источниках: 26 января 2022 г.
Авторы:Shnyreva AV,
Syzova TP,
Bragina MP,
Viktorov AN,
Dyakov YuT
Аннотация:Several Penicillium and Aspergillus species are known to be the most common, sometimes allergogenic, and harmful fungi in human environment. In this study twenty one strains of penicilli-aspergilli group isolated from different polymeric materials and air at the space station «Mir» were analyzed by using RAPD-markers. Cluster analysis of the DNA polymorphisms based on the unweighted pair-group method algorithm (UPGMA) revealed four genetically diverse clusters, one of which consisted of a majority of very similar A. versicolor strains isolated from different substrates in 1996. These isolates seem to be of common origin. One of them was very distant from the other aspergilli cluster and never found in earlier years at the station; it is more likely a transient one. One strain was identified as A. flavus. The six P. expansum isolates were separated into the two divergent groups of both resident and transient strains, two of them isolated in one-year interval being identical that indicates their clonal origin. Interestingly, three starins of P. chrysogenum isolated in eight-year interval (1988 through 1996) were very close by clustering. They represent genetically identical clones of the same origin and are considered as resident penicilli. Results are discussed in relation to the dynamics and possible ways of origin of harmful fungal inhabitants in the artificial environment at «Mir» station.