Faculty of Biology, University of Latvia
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Environ Exp Biol (2015) 13: 159–168
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Environmental and

Environ Exp Biol (2015) 13: 159–168

Orginal Articles

Influence of Trichoderma isolates and Phlebiopsis gigantea on the growth of Heterobasidion parviporum and wood decay of Norway spruce in controlled conditions

Laura Alksne1, Vizma Nikolajeva1,*, Zaiga Petriņa1, Daina Eze2, Tālis Gaitnieks3
1 Department of Microbiology and Biotechnology, Faculty of Biology, University of Latvia, Jelgavas 1, Riga LV–1004, Latvia
2 Microbial Strain Collection of Latvia, Faculty of Biology, University of Latvia, Jelgavas 1, Riga LV–1004, Latvia
3 Forest Sector Competence Center, LLC “MNKC”, Dzerbenes 27, Riga LV–1006, Latvia
* Corresponding author, E-mail: vizma.nikolajeva@lu.lv


Heterobasidion parviporum-caused root rot is a destructive infection to conifers, especially Norway spruce Picea abies. The disease can be limited by the biocontrol agent fungus Phlebiopsis gigantea. The aim of this work was to study the impact of four previously selected psychrotrophic fast-growing strains of Trichoderma, P. gigantea and combinations of both agents on the growth of H. parviporum in spruce wood blocks and on the structure and chemical composition of wood in laboratory conditions. Stained wood cuts were examined under a microscope and the chemical composition of wood was determined. All investigated Trichoderma strains belonging to species T. viride and T. viridescens inhibited the growth of H. parviporum in the wood. Protective efficiency of Trichoderma spp. against spruce dry weight losses reached 77 to 79%. The study indicated a need for development of combined Trichoderma spp. and P. gigantea plant protection products for biocontrol of root rot. We propose that fast-growing Trichoderma could restrict the colonization of wood surface by rot fungi, while P. gigantea competes with them in deeper parts of wood.

Key words: biocontrol, Heterobasidion, Norway spruce, Phlebiopsis, Trichoderma, wood.

Environ Exp Biol (2015) 13: 159–168
 DOI: http://doi.org/10.22364/eeb

Prof. Gederts Ievinsh
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University of Latvia

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