VESTNIK
Bashkirskogo universiteta

RUSSIAN
ISSN 1998-4812

Archive | Volume 19, 2014, No. 3.

THE ABUNDANCE OF CULTURABLE FORMS OF CHITIN-AND CHITOSAN-DEGRADING MICROORGANISMS IN SOME SOILS OF THE SOUTHERN URALS

Vestnik Bashkirskogo Universiteta. 2014. Vol. 19. No. 3. Pp. 853-857.
Teregulova G. A.
Institute of Biology of Ufa Research Center of RAS
69 Oktyabrya Ave., 450054 Ufa, Republic of Bashkortostan, Russia.
Aktuganov G. E.
Institute of Biology of Ufa Research Center of RAS
69 Oktyabrya Ave., 450054 Ufa, Republic of Bashkortostan, Russia.
Email: gleakt@anrb.ru
Suleymanov R. R.
Institute of Biology of Ufa Research Center of RAS
69 Oktyabrya Ave., 450054 Ufa, Republic of Bashkortostan, Russia.
Bogdanova Yu. G.
Bashkir State University
32 Zaki Validy St., 450076 Ufa, Republic of Bashkortostan, Russia.
Yangildina Yu. Ya.
Bashkir State University
32 Zaki Validy St., 450076 Ufa, Republic of Bashkortostan, Russia.

Abstract

Estimate of abundance of chitinolytic and chitosanolytic microorganisms in soils from various ecological-geographic areas of Southern Urals was performed. It is found, that highest abundance of chitinolytic microorganisms (106-107 CFU/g of soil) is observed in alluvial soils of river bottom-lands and also in gray forest soil achieving 9-17% of total number of isolates. Chitosan-degrading microorganisms comprise from 1 to 20% of chitinolytic isolates depending on soil type at that their highest abundance was recorded for the same soils. Up to 90% of all chitinolytic isolates were subactive microorganisms slowly hydrolyzing chitin. Most number of highly active chitinolytic bacteria were found in mentioned above soils and also in leached chernozem. Most active destructors of chitosan were micromycetes isolated at 20○С and 37○С and pH 4.0 from in leached chernozem and alluvial grassland soil and composing 50-100% from total number of active isolates. Most species diversity and abundance of chitin/chitosan destructors is recorded within mesophilic microorganisms growing under pH 6.6-7.0 and 20○С.

Keywords

  • • chitin
  • • chitosan
  • • biodestruction
  • • soil microbial population
  • • chitinolytic activity

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