Heartwood stump colonisation by Heterobasidion parviporum and H. annosum s.s. in Norway spruce (Picea abies) stands

Oliva, Jonàs; Bernat, Maria; Stenlid, Jan

doi:10.1016/j.foreco.2013.01.005

Cited by 27 publications

(18 citation statements)

References 30 publications

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“…It is well known that the manner by which Heterobasidion pathogen mycelium penetrate root and trunk tissues ( Figure 3) is different for pine and spruce [6,8]. Generally, in pine, mycelium of H. annosum develops primarily in and around cambial tissues and in the external sapwood, while in spruce, H. parviporum mycelium develops in the heartwood [60,61]. While in pines, infected trees die quite quickly due to fungal cells that cause decay of tree tissues at the root collar, in spruce the disease process can last for decades, with infected trees not displaying signs of crown dieback because the cambium and phloem remain healthy and retain their conductive abilities [8].…”

Section: Substrate Influencementioning

confidence: 99%

Why Does Phlebiopsis gigantea not Always Inhibit Root and Butt Rot in Conifers?

Żółciak

Sikora

Wrzosek

et al. 2020

Forests

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This review aims to identify possible causes of differing effectiveness of artificial biological control of Heterobasidion root rot by the saprotrophic fungus Phlebiopsis gigantea. We describe published information in terms of pathogen–competitor relationships and the impact of environmental and genetic factors. We also revisit data from original research performed in recent years at the Forest Research Institute in Poland. We hypothesized that, in many cases, competition in roots and stumps of coniferous trees between the necrotrophic Heterobasidion spp. and the introduced saprotroph, Phlebiopsis gigantea, is affected by growth characteristics and enzymatic activity of the fungi, the characteristics of the wood, and environmental conditions. We concluded that both wood traits and fungal enzymatic activity during wood decay in roots and stumps, and the richness of the fungal biota, may limit biological control of root rot. In addition, we identify the need for research on new formulations and isolates of the fungal competitor, Phlebiopsis gigantea, as well as on approaches for accurately identifying the infectious threat from pathogens.

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Section: Substrate Influencementioning

confidence: 99%

Why Does Phlebiopsis gigantea not Always Inhibit Root and Butt Rot in Conifers?

Żółciak

Sikora

Wrzosek

et al. 2020

Forests

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“…Occasionally, pathogen can reach the sapwood. Field inoculation experiments demonstrated that heartwood of Norway spruce stumps was more susceptible to H. parviporum and H. annosum infection than heartwood of Scots pine stumps (Oliva et al ., ). The strategies to control the disease focus mainly on the prevention of fungal infection of tree stumps remaining after harvesting.…”

Section: Introductionmentioning

confidence: 97%

Mycobiome analysis of asymptomatic and symptomatic Norway spruce trees naturally infected by the conifer pathogens Heterobasidion spp.

Kovalchuk

Mukrimin

Zeng

et al. 2018

Environ Microbiol Rep

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Plant microbiome plays an important role in maintaining the host fitness. Despite a significant progress in our understanding of the plant microbiome achieved in the recent years, very little is known about the effect of plant pathogens on composition of microbial communities associated with trees. In this study, we analysed the mycobiome of different anatomic parts of asymptomatic and symptomatic Norway spruce trees naturally infected by Heterobasidion spp. We also investigated the primary impact of the disease on the fungal communities, which are associated with Norway spruce trees. Our results demonstrate that the structure of fungal communities residing in the wood differed significantly among symptomatic and asymptomatic Heterobasidion-infected trees. However, no significant differences were found in the other anatomic regions of the trees. The results also show that not only each of individual tree tissues (wood, bark, needles and roots) harbours a unique fungal community, but also that symptomatic trees were more susceptible to co-infection by other wood-degrading fungi compared to the asymptomatic ones.

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“…Furthermore, these results may help explain differences in the colonization pattern of Norway spruce and Scots pine by Heterobasidion fungi. In Norway spruce, the heartwood is more favourable for fungal growth, whereas in Scots pine it is confined to the sapwood (Oliva, Bernat, & Stenlid, ). The reason for the avoidance of Scots pine heartwood by Heterobasidion could perhaps be attributed to documented inhibitory effects of accumulated stilbenes (Johansson, Lundgren, & Asiegbu, ; Puentes Rodriguez, ).…”

Section: Discussionmentioning

confidence: 99%

Differential responses of Scots pine stilbene synthase and chalcone synthase genes to Heterobasidion annosum infection

et al. 2017

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Summary Phenolic compounds are essential components of the defensive chemical arsenal of conifer trees. This chemically diverse group encompasses stilbenoids, flavonoids, isoflavonoids, proanthocyanidins and lignans. All of them are produced from the common precursors, CoA esters of the phenylpropanoids: p‐coumaroyl‐CoA, cinnamoyl‐CoA, caffeoyl‐CoA and feruloyl‐CoA. Two classes of enzymes, stilbene synthases and chalcone synthases, play important roles in the biosynthesis of plant phenolics, such as the conversion of the phenylpropanoid‐CoA esters into stilbenoids and flavonoids, respectively. In this study, we investigated the transcriptional responses of the Scots pine (Pinus sylvestris) genes encoding stilbene and chalcone synthases to the infection by the fungal pathogen Heterobasidion annosum. The experiments were performed on pine seedlings and mature trees. Our results show that the stilbene synthase gene is strongly induced in both age groups, but the level of induction in adult trees varied considerably among individual trees. Systemic induction in needles and hypocotyl regions was documented in young seedlings following fungal inoculation in root region. Concurrent changes in the expression of the chalcone synthase gene in response to fungal infection were much less pronounced. Our data confirm previous observations on the differential regulation of these enzymes in Scots pine and emphasize the role of stilbene synthase in the induced response to fungal infection.

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Heartwood stump colonisation by Heterobasidion parviporum and H. annosum s.s. in Norway spruce (Picea abies) stands

Cited by 27 publications

References 30 publications

Why Does Phlebiopsis gigantea not Always Inhibit Root and Butt Rot in Conifers?

Why Does Phlebiopsis gigantea not Always Inhibit Root and Butt Rot in Conifers?

Mycobiome analysis of asymptomatic and symptomatic Norway spruce trees naturally infected by the conifer pathogens Heterobasidion spp.

Differential responses of Scots pine stilbene synthase and chalcone synthase genes to Heterobasidion annosum infection

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