Mikrobiol. Z. 2017; 79(2):48-56. Ukrainian.
doi: https://doi.org/10.15407/microbiolj79.02.048

Radial Growth Rate of Microscopic Fungi Isolated from Plasterboard

Pysmenna Yu.B., Kurchenko I.M.

Zabolotny Institute of Microbiology and Virology, NAS of Ukraine
154 Akad. Zabolotny Str., Kyiv, 03143, Ukraine

The aim. Investigation the colonization rate of micromycetes isolated from plasterboard media with different content of gypsum board and its components. Methods. To determine the growth rate and the length of the lag phase were used Capek mineral media with the addition of powdered plasterboard (PBM) or components: cardboard (CBM) and core (CM) content of 0.5 %, 1 %, 2.5 %, 5 %, 10 %. Results. It was found that radial growth rate (Кr) of the studied cultures on media with the addition of gypsum board and its components was signifcantly higher than one on the control medium. The rate of growth of Chaetomium globosum and Trichoderma viride was the highest among the studied strains (0.272 and 0.25 mm/h, respectively), values for Neosartorya fsсheri, Aspergillus niger, Alternaria infectoria were slightly lower; and for Stachybotrys chartarum and Aspergillus favipes – half lower. The average radial growth rate unchanged for media with different core content, and the development on cardboard media accord to PBM. The duration of the lag phase of colonies of microscopic fungi was longer for 6 – 12 hours on CBM compared with PBM and CM for A. favipes, A. versicolor, C. cladosporioides and C. sphaerospermum. Conclusion. Thus, the composition of the medium infuences the growth rate of the studied micromycetes, especially content additions. Radial growth rate and maximum crop was not signifcantly differ on the media with the addition of 5 % and 10 % of plasterboard. It was established that all investigated factors affecting the growth rate of micromycetes, species of microscopic fungi and concentration of medium components have the greatest impact.

Key words: radial growth rate, the length of the lag phase, microscopic fungi, plasterboard.

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