Influence of long‐term repeated prescribed burning on mycelial communities of ectomycorrhizal fungi

Bastias, Brigitte A.; Xu, Zhihong; Cairney, John

doi:10.1111/j.1469-8137.2006.01793.x

Cited by 69 publications

(45 citation statements)

References 42 publications

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“…Also, the same rationale applies to the lower layer. Studies similar to ours have also found lower fungal richness (Smith et al, 2004) or different fungal community structures (Bastias et al, 2006) in the upper 10 cm layer of soils variously affected by fire but interestingly, no trend at a depth of 10-20 cm (Bastias et al, 2006).…”

Section: Soil Nutrients and Mycorrhizationsupporting

confidence: 66%

“…This was true also in the site most severely affected by fire, where higher colonization rates would have been expected at the lower (deeper) root parts. This could have come as a result of higher exposure of the top layer to very high temperatures and buffering of the lower layer (Bastias et al, 2006, Kipfer et al, 2010. Our results might indicate a particularly high resistance 8 other variables cannot be ruled out (Pausas et al, 2002, Gray & Dighton, 2009.…”

Section: Mycorrhization and Plant Developmentmentioning

confidence: 59%

“…Mycorrhizae were absent from high intensity burning treatments, while in mildly burned treatments part of the existing mycorrhizae were kept in the deeper mineral soil layers. Thus, soil horizon also mediates the impact of fires on ECM fungi (Bastias et al, 2006, Jiménez-Esquilín et al, 2007, Ponzetti et al, 2007, Kipfer et al, 2010. This is evident as heat is greater closest to the surface, and it is within the top few centimeters of soil where the majority of fungal communities are located (Dahlberg et al, 2001, Kipfer et al, 2010.…”

Section: Introductionmentioning

confidence: 88%

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The effects of fire severity on ectomycorrhizal colonization and morphometric features in Pinus pinaster Ait. seedlings

Gassibe

Rueda

Blanco³

et al. 2016

For. syst.

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Aim of the study: Mycorrhizal fungi in Mediterranean forests play a key role in the complex process of recovery after wildfires. A broader understanding of an important pyrophytic species as Pinus pinaster and its fungal symbionts is thus necessary for forest restoration purposes. This study aims to assess the effects of ectomycorrhizal symbiosis on maritime pine seedlings and how fire severity affects fungal colonization ability.Area of study: Central Spain, in a Mediterranean region typically affected by wildfires dominated by Pinus pinaster, a species adapted to fire disturbance.Material and Methods: We studied P. pinaster root apexes from seedlings grown in soils collected one year after fire in undisturbed sites, sites moderately affected by fire and sites highly affected by fire. Natural ectomycorrhization was observed at the whole root system level as well as at two root vertical sections (0-10 cm and 10-20 cm). We also measured several morphometric traits (tap root length, shoot length, dry biomass of shoots and root/shoot ratio), which were used to test the influence of fire severity and soil chemistry upon them.Main results: Ectomycorrhizal colonization in undisturbed soils for total and separated root vertical sections was higher than in soils that had been affected by fire to some degree. Inversely, seedling vegetative size increased according to fire severity.Research highlights: Fire severity affected soil properties and mycorrhizal colonization one year after occurrence, thus affecting plant development. These findings can contribute to a better knowledge of the factors mediating successful establishment of P. pinaster in Mediterranean forests after wildfires.Keywords: Wildfire; mycorrhizal fungi; Maritime pine; bioassay. Citation: Vásquez-Gassibe, P., Oria-de-Rueda, J.A., Santos-del-Blanco, L., Martín-Pinto, P. (2016). The effects of fire severity on ectomycorrhizal colonization and morphometric features in Pinus pinaster Ait. seedlings. Forest Systems, Volume 25, Issue 1, e050. http://dx

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Section: Soil Nutrients and Mycorrhizationsupporting

confidence: 66%

Section: Mycorrhization and Plant Developmentmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 88%

See 1 more Smart Citation

The effects of fire severity on ectomycorrhizal colonization and morphometric features in Pinus pinaster Ait. seedlings

Gassibe

Rueda

Blanco³

et al. 2016

For. syst.

View full text Add to dashboard Cite

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“…A similar trend was observed by Tuininga and Dighton (2004) on ectomycorrhizal roots of adult pine trees previously exposed to prescribed fire: they found no consistent stand-specific changes in fungal diversity but clear shifts in morphotype richness between soil horizons compared to unburned plots. High burning frequency, however, may lead to a loss of ectomycorrhizal fungal diversity as reported by Bastias et al (2006).…”

Section: Introductionmentioning

confidence: 91%

Post-fire seedlings of Nothofagus alpina in Southern Chile show strong dominance of a single ectomycorrhizal fungus and a vertical shift in root architecture

2008

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We investigated belowground responses of Nothofagus alpina seedlings to post-fire conditions during natural regeneration after a wildfire in Chile, focusing on mycorrhizal community and root architecture. The complete root systems of 2-year-old N. alpina seedlings were extracted from a post-fire site with natural regeneration and compared to roots of seedlings from undisturbed forest nearby. Mycorrhizal morphotype richness was determined in each seedling. Morphometric parameters of tertiary root structure and dry biomass of whole root systems were determined in 5 cm vertical intervals and in four lateral root classes. With 43.5% of colonized vital mycorrhizal root tips, the Basidiomycete Descolea antarctica was the most abundant fungal symbiont on post-fire seedlings. Tertiary root morphology of these seedlings was distinct from control plants and characterized by a deep-reaching tap root with rather evenly distributed lateral branches whereas seedlings from the undisturbed site had shallower root systems with most lateral roots concentrated in the upper soil layers. Post-fire seedlings had more mycorrhizal rootlets and mycorrhiza-bearing third order lateral roots than control plants which was expressed in a 34% higher total root number but only a 10% higher total root biomass, although both values were not statistically significant. A major part of these fine roots in seedlings from burnt forest was found in deeper soil horizons, compared to the seedlings from undisturbed forest. According to our results, post-fire conditions clearly favour Descolea antarctica as an early ectomycorrhizal colonizer of Nothofagus seedlings at the studied site. As no significant changes in soil chemistry could be observed at the burnt site, the deep-reaching tertiary root architecture of these seedlings may be interpreted as a response to other abiotic factors like reduced moisture in surface soil.

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“…The PCR programme was conducted with an initial denaturation step at 95°C for 8 min, followed by 35 thermal cycles of 30 s at 94°C and 45 s at 48°C, and 3 min at 72°C and a final extension step at 72°C for 10 min were chosen. For amplification of the fungal rDNA internal spacer (ITS) region DNA fragments, a semi-nested approach as described by Bastias et al (2006) was used. PCR was conducted using a FlexCycler TM PCR thermocycler (Analytik Jena AG), and products were checked by electrophoresis in 1.5% (w/v) agarose gels following ethidium bromide staining (10 mg ml −1 ), as well as quantified using PicoGreen dsDNA quantitation reagent (Invitrogen).…”

Section: Methodsmentioning

confidence: 99%

Substrate-induced volatile organic compound emissions from compost-amended soils

et al. 2010

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The agronomic effects of composts, mineral fertiliser and combinations thereof on chemical, biological and physiological soil properties have been studied in an 18-year field experiment. The present study aimed at tracing treatment effects by evaluating the volatile organic compound (VOC) emission of the differently treated soils: non-amended control, nitrogen fertilisation and composts (produced from organic waste and sewage sludge, respectively) in combination with nitrogen fertiliser. Microbial community structure was determined by denaturing gradient gel electrophoresis (DGGE). Aerobic and anaerobic soil VOC emission was determined after glucose amendment using proton transfer reaction-mass spectrometry (PTR-MS). After inducing VOC production by substrate (glucose) addition and at the same time reducing oxygen availability to impair degradation of the produced VOCs, we were able to differentiate among the treatments. Organic waste compost did not alter the VOC emissions compared to the untreated control, whilst sewage sludge composts and mineral fertilisation showed distinct effects. This differentiation was supported by DGGE analysis of fungal 18S rDNA fragments and confirms earlier findings on bacterial communities. Three major conclusions can be drawn: (1) VOC patterns are able to discriminate among soil treatments.(2) Sewage sludge compost and mineral fertilisation have not only the strongest impact on microbial community composition but also on VOC emission patterns, but specific tracer VOCs could not be identified. (3) Future efforts should aim at a PTR-MS-linked identification of the detected masses.

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Influence of long‐term repeated prescribed burning on mycelial communities of ectomycorrhizal fungi

Cited by 69 publications

References 42 publications

The effects of fire severity on ectomycorrhizal colonization and morphometric features in Pinus pinaster Ait. seedlings

The effects of fire severity on ectomycorrhizal colonization and morphometric features in Pinus pinaster Ait. seedlings

Post-fire seedlings of Nothofagus alpina in Southern Chile show strong dominance of a single ectomycorrhizal fungus and a vertical shift in root architecture

Substrate-induced volatile organic compound emissions from compost-amended soils

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