CASIROZ: Root Parameters and Types of Ectomycorrhiza of Young Beech Plants Exposed to Different Ozone and Light Regimes

Železnik, Peter; Hrenko, Melita; Then, Christiane; Koch, N.; Grebenc, Tine; Levanič, Tom; Kraigher, Hojka

doi:10.1055/s-2006-955916

Cited by 28 publications

(10 citation statements)

References 45 publications

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“…This was attributed to low irradiance and its effect on seedling carbohydrate status. Other studies examining shade intolerant deciduous species have found similar trends across light gradients in oak-hemlock and beech forests (Zeleznik et al, 2007;Turner et al, 2009). Mycorrhizal networks have been shown to play an important role in facilitating carbon transfer from overstory trees to understory seedlings experiencing light limitation (Beiler et al, 2009;Courty et al, 2010).…”

Section: Em Fungi and Forest Successionmentioning

confidence: 85%

Mycorrhizas and secondary succession in aspen–conifer forests: Light limitation differentially affects a dominant early and late successional species

Clark¹,

Clair²

2011

Forest Ecology and Management

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Section: Em Fungi and Forest Successionmentioning

confidence: 85%

Mycorrhizas and secondary succession in aspen–conifer forests: Light limitation differentially affects a dominant early and late successional species

Clark¹,

Clair²

2011

Forest Ecology and Management

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“…From each sample all roots were removed from soil and gently washed to remove all the remaining soil particles attached to the roots. For further processing, roots with diameter less than 2 mm (e. g., fine roots sensu Železnik et al, 2007, 2016) were selected and freeze dried at −92°C for 48 h. After freeze drying, roots were homogenized into a fine powder using a Retsch mixer mill (Retsch, Haan, Germany).…”

Section: Methodsmentioning

confidence: 99%

Root-Associated Fungal Communities From Two Phenologically Contrasting Silver Fir (Abies alba Mill.) Groups of Trees

et al. 2019

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Root-associated fungal communities are important components in ecosystem processes, impacting plant growth and vigor by influencing the quality, direction, and flow of nutrients and water between plants and fungi. Linkages of plant phenological characteristics with belowground root-associated fungal communities have rarely been investigated, and thus our aim was to search for an interplay between contrasting phenology of host ectomycorrhizal trees from the same location and root-associated fungal communities (ectomycorrhizal, endophytic, saprotrophic and pathogenic root-associated fungi) in young and in adult silver fir trees. The study was performed in a managed silver fir forest site. Twenty-four soil samples collected under two phenologically contrasting silver fir groups were analyzed for differences in root-associated fungal communities using Illumina sequencing of a total root-associated fungal community. Significant differences in beta diversity and in mean alpha diversity were confirmed for overall community of ectomycorrhizal root-associated fungi, whereas for ecologically different non-ectomycorrhizal root-associated fungal communities the differences were significant only for beta diversity and not for mean alpha diversity. At genus level root-associated fungal communities differed significantly between early and late flushing young and adult silver fir trees. We discuss the interactions through which the phenology of host plants either drives or is driven by the root-associated fungal communities in conditions of a sustainably co-naturally managed silver fir forest.

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“…Hence, the outcome of this experiment reinforces branch-cuvette studies for adequate estimates of the O 3 sensitivity of tree foliage under field conditions. One needs to be aware, however, that assessment of whole-tree O 3 sensitivity must account, in addition, for belowground processes (Grebenc and Kraigher, 2007;Železnik et al, 2007) and root-shoot communication via phytohormonal signals (Winwood et al, 2007).…”

Section: Juvenile Trees and Branches As Surrogates Of Adult-tree O 3 mentioning

confidence: 99%

Synopsis of the CASIROZ Case Study: Carbon Sink Strength of Fagus sylvatica L. in a Changing Environment ‐ Experimental Risk Assessment of Mitigation by Chronic Ozone Impact

et al. 2007

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Databases are needed for the ozone (O(3)) risk assessment on adult forest trees under stand conditions, as mostly juvenile trees have been studied in chamber experiments. A synopsis is presented here from an integrated case study which was conducted on adult FAGUS SYLVATICA trees at a Central-European forest site. Employed was a novel free-air canopy O(3) fumigation methodology which ensured a whole-plant assessment of O(3) sensitivity of the about 30 m tall and 60 years old trees, comparing responses to an experimental 2 x ambient O(3) regime (2 x O(3), max. 150 nl O(3) l (-1)) with those to the unchanged 1 x ambient O(3) regime (1 x O(3)=control) prevailing at the site. Additional experimentation on individual branches and juvenile beech trees exposed within the forest canopy allowed for evaluating the representativeness of young-tree and branch-bag approaches relative to the O(3) sensitivity of the adult trees. The 2 x O(3) regime did not substantially weaken the carbon sink strength of the adult beech trees, given the absence of a statistically significant decline in annual stem growth; a 3 % reduction across five years was demonstrated, however, through modelling upon parameterization with the elaborated database. 2 x O(3) did induce a number of statistically significant tree responses at the cell and leaf level, although the O(3) responsiveness varied between years. Shade leaves displayed an O(3) sensitivity similar to that of sun leaves, while indirect belowground O(3) effects, apparently mediated through hormonal relationships, were reflected by stimulated fine-root and ectomycorrhizal development. Juvenile trees were not reliable surrogates of adult ones in view of O(3) risk assessment. Branch sections enclosed in (climatized) cuvettes, however, turned out to represent the O(3) sensitivity of entire tree crowns. Drought-induced stomatal closure decoupled O(3) intake from O(3) exposure, as in addition, also the "physiologically effective O(3) dose" was subject to change. No evidence emerged for a need to lower the "Critical Level for Ozone" in risk assessment of forest trees, although sensitive tree parameters did not necessarily reflect a linear relationship to O(3) stress. Exposure-based concepts tended to overestimate O(3) risk under drought, which is in support of current efforts to establish flux-related concepts of O(3) intake in risk assessment.

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CASIROZ: Root Parameters and Types of Ectomycorrhiza of Young Beech Plants Exposed to Different Ozone and Light Regimes

Cited by 28 publications

References 45 publications

Mycorrhizas and secondary succession in aspen–conifer forests: Light limitation differentially affects a dominant early and late successional species

Mycorrhizas and secondary succession in aspen–conifer forests: Light limitation differentially affects a dominant early and late successional species

Root-Associated Fungal Communities From Two Phenologically Contrasting Silver Fir (Abies alba Mill.) Groups of Trees

Synopsis of the CASIROZ Case Study: Carbon Sink Strength of Fagus sylvatica L. in a Changing Environment ‐ Experimental Risk Assessment of Mitigation by Chronic Ozone Impact

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