2009
DOI: 10.1128/aem.02392-08
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Spatial Patterns in Hyphal Growth and Substrate Exploitation within Norway Spruce Stems Colonized by the Pathogenic White-Rot Fungus Heterobasidion parviporum

Abstract: In Norway spruce, a fungistatic reaction zone with a high pH and enrichment of phenolics is formed in the sapwood facing heartwood colonized by the white-rot fungus Heterobasidion parviporum. Fungal penetration of the reaction zone eventually results in expansion of this xylem defense. To obtain information about mechanisms operating upon heartwood and reaction zone colonization by the pathogen, hyphal growth and wood degradation were investigated using real-time PCR, microscopy, and comparative wood density a… Show more

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Cited by 25 publications
(22 citation statements)
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“…complex is manifested by an ability to challenge active bark defenses and the unique secondary xylem defense tissue [reaction zone wood (RZ)] characterized by polyphenols that have been actively deposited in tracheid and ray cell lumens by the living sapwood cells (e.g. Hietala et al, 2009). Furthermore, the tracheid cell wall lignin is a feeding obstacle that H. annosum s.l.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…complex is manifested by an ability to challenge active bark defenses and the unique secondary xylem defense tissue [reaction zone wood (RZ)] characterized by polyphenols that have been actively deposited in tracheid and ray cell lumens by the living sapwood cells (e.g. Hietala et al, 2009). Furthermore, the tracheid cell wall lignin is a feeding obstacle that H. annosum s.l.…”
Section: Discussionmentioning
confidence: 99%
“…For the two Eurasian species H. annosum sensu stricto and Heterobasidion parviporum (Niemelä and Korhonen, 1998), both selective and non-selective wood lignin decay modes have been reported (Daniel et al, 1998). Besides the ability to kill vascular cambium and the living cells of inner bark upon fungal penetration through roots, in conifer trees such as Norway spruce (Picea abies), Heterobasidion species can tolerate and presumably detoxify the polyphenols that accumulate as a tree defense response [reaction zone wood (RZ)] opposing the expanding fungal decay columns in the root and stem xylem (Hietala et al, 2009). …”
Section: Introductionmentioning
confidence: 99%
“…The flux based estimates are from the five Heterobasidion infected trees monitored at Hokksund and the one monitored at Ås. Wood density estimates are based on stem section data of one Norway spruce tree that showed an extensive stem decay column caused by Heterobasidion parviporum in our previous study [26] (tree #9).…”
Section: Upscaling Of Co2 Fluxes From Decaying Stem Heartwood To Stanmentioning
confidence: 99%
“…To test how the estimated fluxes conformed to biomass loss from rotten wood, we used the wood density profiles measured from a Norway spruce tree with an advanced stem decay column caused by Heterobasidion parviporum [26]. The estimated biomass loss was converted to annual CO2 flux in kg per square meter by converting the distance between the sampling points to colonization time with the assumption of a constant vertical spread of decay.…”
Section: Upscaling Of Co2 Fluxes From Decaying Stem Heartwood To Stanmentioning
confidence: 99%
“…is regarded as one of the most serious and important forest pathogen that causes butt and root rot, especially in boreal forests (Hietala et al 2009). This basidiomycete (Russulales, Bondarzewiaceae) represents the first "sequenced plant pathogenic homosidiomycete" bearing a complete genome sequence (Olson et al 2012;Garbelotto and Gonthier 2013 (Dalman et al 2010), and three in Europe (Niemelä and Korhonen 1998 Niemelä & Korhonen (F type).…”
Section: List Of Original Articlesmentioning
confidence: 99%