Formation of higher plant component microbial community in closed ecological system.
Closed ecological systems (CES) place at the disposal of a researcher unique possibilities to study the role of microbial communities in individual components and of the entire system. The microbial community of the higher plant component has been found to form depending on specific conditions of the closed ecosystem: length of time the solution is reused, introduction of intrasystem waste water into the nutrient medium, effect of other component of the system, and system closure in terms of gas exchange. The higher plant component formed its own microbial complex different from that formed prior to closure. The microbial complex of vegetable polyculture is more diverse and stable than the monoculture of wheat. The composition of the components' microflora changed, species diversity decreased, individual species of bacteria and fungi whose numbers were not so great before the closure prevailed. Special attention should be paid to phytopathogenic and conditionally pathogenic species of microorganisms potentially hazardous to man or plants and the least controlled in CES. This situation can endanger creation of CES and make conjectural existence of preplanned components, man, specifically, and consequently, of CES as it is.
Tirranen
L S
LS
Institute of Biophysics, Russian Academy of Sciences, Siberian Branch, Academgorodok, 660036 Krasnoyarsk, Russia. ibp@ibp.krasnoyarsk.su
D019607:Brassicaceae / Q000254:growth & development / Q000382:microbiology; D015169:Colony Count, Microbial; D003470:Culture Media; D018504:Ecological Systems, Closed; D018527:Hydroponics; D008021:Life Support Systems; D018517:Plant Roots / Q000254:growth & development / Q000382:microbiology*; D012639:Seeds / Q000254:growth & development / Q000382:microbiology; D013997:Time Factors; D014908:Triticum / Q000254:growth & development / Q000382:microbiology; D014865:Waste Disposal, Fluid; D014871:Water Microbiology
D003470:Culture Media