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Bernat, Maria, 2011. Infection preference of Heterobasidion annosum s.s. and H. parviporum on sapwood and heartwood pine and spruce stumps. Second cycle, A2E. Uppsala: SLU, Dept. of Forest Mycology and Plant Pathology

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Important losses in forest production are caused by fungi of the genus Heterobasidion in the Scandinavian region. After thinning, spores germinate on the surface of stumps, they infect the root system and they spread to neighbouring trees through root contacts. In this study we explore the
preference of different species of Heterobasidion for different areas of stumps (heartwood and sapwood) and whether or not the preference of infection is associated with moisture content. In two stands, inoculations of H. annosum s.s. and H. parviporum were done in 56 stumps of Pinus sylvestris and in 84 stumps of Picea abies. To know the infection preference, spores of both species of pathogenic fungi were inoculated in sapwood, border and heartwood stump zone of spruce and sapwood and heartwood zone of pine. We calculated the moisture content from a wet sample of each zone in the stump. On spruce, heartwood was the most infected area by H. parviporum (72.4%), followed by
border (44%) and, at last, sapwood (30.2%). Infection on stumps tended to spread towards the heartwood, independently from where the inoculation was done. On spruce, H. annosum s.s. behaved similarly to H. parviporum but the percentage of infection and spread between areas was smaller. In pine stumps, infected areas were very low (5.1%). No clear association with moisture was found, although both Heterobasidion spp. tended to have a preference for infected areas with low moisture content.

Main title:Infection preference of Heterobasidion annosum s.s. and H. parviporum on sapwood and heartwood pine and spruce stumps
Authors:Bernat, Maria
Supervisor:Oliva, Jonàs and Stenlid, Jan
Examiner:Högberg, Nils
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2011
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:SM001 Euroforester - Master's Programme 120 HEC
Supervising department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
Keywords:Heterobasidion spp, Picea abies, Pinus sylvestris, Infection, Sapowood
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Subject. Use of subject categories until 2023-04-30.:Forest injuries and protection
Additional Information:Fulltext till examensarbetet är synlig endast till bibliotekspersonal fram till 3 januari 2013.
Deposited On:27 Jan 2012 13:50
Metadata Last Modified:20 Apr 2012 14:24

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