The importance of inoculum size for the competitive ability of wood decomposing fungi

Holmer, Lillian; Stenlid, Jan

doi:10.1111/j.1574-6941.1993.tb00029.x

Cited by 98 publications

(53 citation statements)

References 6 publications

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“…In the case of fungi, the ability to deploy extracellular enzymes to acquire organic carbon that is unavailable to others-such as lignin-protected resources-may also confer competitive success (229). Filamentous growth can likewise be advantageous among fungi competing for wood colonization (50,(230)(231)(232).…”

Section: Figmentioning

confidence: 99%

Fungal Traits That Drive Ecosystem Dynamics on Land

Treseder

Lennon

2015

Microbiol Mol Biol Rev

439

322

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SUMMARY Fungi contribute extensively to a wide range of ecosystem processes, including decomposition of organic carbon, deposition of recalcitrant carbon, and transformations of nitrogen and phosphorus. In this review, we discuss the current knowledge about physiological and morphological traits of fungi that directly influence these processes, and we describe the functional genes that encode these traits. In addition, we synthesize information from 157 whole fungal genomes in order to determine relationships among selected functional genes within fungal taxa. Ecosystem-related traits varied most at relatively coarse taxonomic levels. For example, we found that the maximum amount of variance for traits associated with carbon mineralization, nitrogen and phosphorus cycling, and stress tolerance could be explained at the levels of order to phylum. Moreover, suites of traits tended to co-occur within taxa. Specifically, the genetic capacities for traits that improve stress tolerance—β-glucan synthesis, trehalose production, and cold-induced RNA helicases—were positively related to one another, and they were more evident in yeasts. Traits that regulate the decomposition of complex organic matter—lignin peroxidases, cellobiohydrolases, and crystalline cellulases—were also positively related, but they were more strongly associated with free-living filamentous fungi. Altogether, these relationships provide evidence for two functional groups: stress tolerators, which may contribute to soil carbon accumulation via the production of recalcitrant compounds; and decomposers, which may reduce soil carbon stocks. It is possible that ecosystem functions, such as soil carbon storage, may be mediated by shifts in the fungal community between stress tolerators and decomposers in response to environmental changes, such as drought and warming.

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Section: Figmentioning

confidence: 99%

Fungal Traits That Drive Ecosystem Dynamics on Land

Treseder

Lennon

2015

Microbiol Mol Biol Rev

439

322

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“…However, when measuring activity in wood blocks or other similar materials, great caution must be exercised : a wood block as thin as 2 mm quenches 60 % of the radiation. Nutritional status and\or access to energy in the form of cellulose or plant-host sugars are crucial factors in determining the competitive\combative strength of fungi (Holmer & Stenlid, 1993). The experiments described in this article reflect only one situation.…”

Section: mentioning

confidence: 99%

Translocation of ³²P between interacting mycelia of a wood‐decomposing fungus and ectomycorrhizal fungi in microcosm systems

Lindahl¹,

Stenlid²,

Olsson³

et al. 1999

New Phytologist

Self Cite

135

110

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Interactions between saprotrophic and ectomycorrhizal fungi have been largely ignored, although their mycelia often share the same microsites. The mycelial systems show general similarity to each other and, although the enzymatic potential of the saprotrophic fungi is generally considered to be higher, the importance of organic nutrient sources to ectomycorrhizal fungi is now widely accepted. In the experiments described here, nutritional interactions involving transfer of elements from one mycelium to the other have been monitored dynamically using radioactive tracers and a non-destructive electronic autoradiography system. Microcosms were used in which mycelial systems of the ectomycorrhizal fungi Suillus variegatus and Paxillus involutus, extending from Pinus sylvestris host plants, were confronted with mycelia of the saprotroph Hypholoma fasciculare extending from wood blocks. The fungi showed a clear morphological confrontation response. The mycorrhizal mycelium often formed dense patches over the Hypholoma mycelia. Up to 25 % of the $#P present in the Hypholoma mycelium was captured by the mycorrhizal fungi and translocated to the plant host within 30 d. The transfer of $#P to the saprotroph from labelled mycorrhizal mycelium was one to two orders of magnitude lower. The significance of this transfer as a ' short cut ' in nutrient cycling is discussed.

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“…It is possible that infections of H. annosum in roots will die and not serve as a potential infection source in the next rotation (Dimitri et al 1971). Furthermore, it is possible that infections by H. annosum will be unable to expand in the wood due to competition from later successional decomposing fungi (Rishbeth 1950, Käärik and Rennerfelt 1957, Holmer and Stenlid 1993. In comparison, infections at the stump surface were numerous and covered a relatively larger area.…”

Section: Discussionmentioning

confidence: 99%

Logging operation damage to roots of clear-felled Picea abies and subsequent spore infection by Heterobasidion annosum

Rönnberg

2000

Silva Fenn.

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Two studies were carried out to examine the effects of clear-felling operations on stump roots of Norway spruce (Picea abies (L.) Karst.). In study I, the number of cases and the degree of damage to stump roots of Norway spruce were investigated on three clearfelled sites in northern and southern Sweden respectively. The cutting was done in winter or spring. A mean of 37 % of the stumps had signs of root damage caused by clear-felling operations. Study II was carried out on two sites in southern and two sites in northern Sweden. The trees were clear-felled in June or July. The frequency of natural infection by Heterobasidion annosum (Fr.) Bref. through damaged roots was compared to infection through stump surfaces. The total area of damage on roots was 88 % of the stump surface area. On average, 54 % of the stumps were infected through the stump surface and 19 % through locations of root damage. The root infections, however, were generally small in size as compared to stump surface infections. The study shows that damage to roots at clear-felling may be extensive, but this probably is not of great importance for the efficacy of stump treatment against H. annosum.

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The importance of inoculum size for the competitive ability of wood decomposing fungi

Cited by 98 publications

References 6 publications

Fungal Traits That Drive Ecosystem Dynamics on Land

Fungal Traits That Drive Ecosystem Dynamics on Land

Translocation of ³²P between interacting mycelia of a wood‐decomposing fungus and ectomycorrhizal fungi in microcosm systems

Logging operation damage to roots of clear-felled Picea abies and subsequent spore infection by Heterobasidion annosum

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The importance of inoculum size for the competitive ability of wood decomposing fungi

Cited by 98 publications

References 6 publications

Fungal Traits That Drive Ecosystem Dynamics on Land

Fungal Traits That Drive Ecosystem Dynamics on Land

Translocation of 32P between interacting mycelia of a wood‐decomposing fungus and ectomycorrhizal fungi in microcosm systems

Logging operation damage to roots of clear-felled Picea abies and subsequent spore infection by Heterobasidion annosum

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Translocation of ³²P between interacting mycelia of a wood‐decomposing fungus and ectomycorrhizal fungi in microcosm systems