Impact of drought and stand edge on mycorrhizal density on the fine roots of Norway spruce

Pešková, Vítězslava; Lorenc, František; Modlinger, Roman; Pokorná, Veronika

doi:10.15287/afr.2015.364

Cited by 7 publications

(6 citation statements)

References 27 publications

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“…Dry mass of roots with diameter up to 1 mm in this study was not significantly influenced by drought stress. It is congruent with study on 80 years old spruces in the first and the second year with the same experimental design (Pešková et al, 2015) and in roots with diameter up to 2 mm on 140 years old spruces after six weeks of water exclusion induced by shelters (Gaul et al, 2008). On the other hand, the influence of drought on root weight has been observed to be negative in roots with diameter up to 1 mm in spruces 12 years old in all four years of the experiment (Palátová, 2004), in roots with diameter up to 2 mm in trees 5 years old, exposed to 11-year reduced watering in greenhouse (Eldhuset et al, 2013) and in young spruce stands in natural conditions, monitored for four years (Konôpka et al, 2013).…”

Section: Discussionsupporting

confidence: 76%

“…The effect of drought on mycorrhizal colonization within Norway spruce stands (including our study) was not so apparent. On 80-yearsold spruces drought induced by shelters significantly reduced the density of active mycorrhizae, but not the density of nonactive mycorrhizae neither proportion of active mycorrhizae (Pešková et al, 2015). In two 12 years-old spruce stands drought induced by shelters (approx.…”

Section: Discussionmentioning

confidence: 87%

“…All root parameters were using fine roots with a diameter up to 1 mm because these roots respond most sensitively to environmental factors, and they are better represented in a soil auger than larger-diameter roots (Pešková & Soukup, 2006). We also intended to keep analyses of fine roots consistent with previously acquired and published data (Pešková et al, 2015). After extraction, roots were stored in a fixative solution of 2.5% glutaraldehyde until further processed.…”

Section: Methodsmentioning

confidence: 99%

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Fine roots of Picea abies compensate for drought stress in the rainfall reduction experiment

Lorenc¹,

Pešková²,

Modlinger³

et al. 2018

Dendrobiology

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This study evaluates the influence of repeated artificial drought stress on the fine root characteristics -including ectomycorrhizae -of Norway spruce [Picea abies (L.) Karst]. The experimental site consisted of two plots in a mature spruce monoculture stand. The water regime at parts of both plots was regulated by shelters and an isolation trench during vegetation season (spring to autumn) since 2010. Root samples were collected during autumn in 2010, 2012, and 2013. Root analyses revealed the effect of drought stress on mycorrhizal root tips changed over time. While a density of active mycorrhizae was about 34% lower in drought-stressed areas compared to nonstressed (control) areas in 2010, it increased by 15% in 2012 and by 22% in 2013 over both plots. We observed the less pronounced effect of drought on a proportion of active mycorrhizae, but it generally followed the pattern of active mycorrhizae density. The density of nonactive mycorrhizae was not influenced by drought but significantly fluctuated during the course of the experiment. Other root characteristics such as the dry mass of fine roots (< 1 mm), the specific length of fine roots (< 1 mm) and the composition of the ectomycorrhizal community (primarily dominated by Amphinema byssoides, Tylospora fibrillosa, Tylopilus felleus, and Cenococcum geophilum) were also not significantly influenced by drought. Our results indicate the ability of Norway spruce fine roots to compensate for repeated drought stress of the intermediate intensity.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 87%

Section: Methodsmentioning

confidence: 99%

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Fine roots of Picea abies compensate for drought stress in the rainfall reduction experiment

Lorenc¹,

Pešková²,

Modlinger³

et al. 2018

Dendrobiology

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“…The global climate change concept expects the occurrence of weather extremes that will limit the life in the regions. So, a drought is supposed to be the most important stress factor influencing forests as well (Hlásny et al 2014;Pešková et al 2015). However, forests in Central Europe resist the drought as a prime damaging agent.…”

Section: Discussionmentioning

confidence: 99%

Salvage felling in the Slovak Republic’s forests during the last twenty years (1998–2017)

Kunca¹,

Zúbrik²,

Galko³

et al. 2019

Central European Forestry Journal

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Global climate change also influences the forest damaging agents occurrence and thus a forest health. Forest trees that are damaged by agents are in managed forests processed by salvage felling. The amount of an annual salvage felling represents the occurrence of a damaging agents occurrence in a certain year. In 2015, the area of forests in Slovakia reached 2.014 mil. ha. Within the 20 years (from 1998 to 2017), the total felling reached 162.52 mil. m3, out of this 47.99 % were ascribed to a salvage felling. Abiotic agents were the most damaging agents (42.28 mil. m3 of damaged wood), out of it a wind was the most important one. Biotic damaging agents were the second important group (32.165 mil. m3), whereas bark beetles on spruce were the most important. The third group and the less damaging one was anthropogenic agents group (3.555 mil. m3) with an air pollution as the most important damaging agent. There was no statistically significant difference in the volume of processed trees within salvage felling caused by abiotic and biotic damaging agents. However, these two groups caused significantly higher damages than the third group of anthropogenic damaging agents. There were two major wind damages, Alžbeta in 2004 and Žofia in 2014 with damaged wood 5.3 mil. m3 and 5.2 mil. m3, respectively. They occurred in southern, central and northern part of Slovakia. As damaged wood was not processed from strict nature conservation areas, the secondary damaging agents, mostly Ips typographus on Norway spruce reproduced as much that after some years it cumulatively reached or even exceeded damages from those two major windthrows episodes.

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“…The short and medium term effects are the reduction of photosynthesis, nutritional disequilibria, having as result the loss of the crown. At stem level, xylophagous insects and fungi, extreme heat or frost generate disturbances of metabolism and conductivity, reduce primary resistance and cause diminutions of the rhythm of cambial activity, while at rootlet system level, draughts, stagnant water, acidification, nutritional disequilibria, pathogenic fungi and bacteria, which most often cause problems of assimilation or even the reduction / complete stop of symbiotic relationships (Gibbs and Greig, 1997;Csóka et al, 1999;Hilszczański and Sierpinski, 2006;Fodor et al, 2011;Pešková et al, 2015;Vuts et al, 2016;Denman et al, 2017).…”

Section: Data Setmentioning

confidence: 99%

Methods for Quantification of the Decline Phenomenon and Determination of the Vulnerability Degree for the Oak Stands in Northwestern Transylvania, Romania

Șimonca¹,

Oroian

Chira

et al. 2017

Not Bot Horti Agrobo

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The decline phenomenon of stands can be defined as the totality of effects that damage the normal vegetation state of trees and stands. There are two types of decline, the acute one, with fast development, and the chronical one, with slow development in space and time. The accurate capture of the phenomenon has direct implications for the forest management measures. A first step in this direction is the analysis of the development type and of its dynamics. Forests which have Quercus species in composition are affected more by this phenomenon. There were identified oak stands presenting decline phenomenon in 9 Forest Districts in Northwestern Transylvania and 22 experimental plots were analyzed. These plots were located in middle aged stands that were affected in different ways. The study was performed during 2013-2015 and focused on crown level assessments of trees, taking into consideration the shape and size, defoliations, percentage of dead or missing slender branches, number of dead thick branches, presence of epicormic branches or dormant buds on the stem, presence of pathogens or pests. These elements were used for calculating some technical indicators of the health and vegetation state: degree of dieback, damage and devitalization, synthetic index damage, annual mortality rate. In 7 out of 22 stands, the overcoming of the incipient stage and beginning of active dieback stage was observed. The strongest correlation occurred between the annual mortality rate and the synthetic index damage.

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Impact of drought and stand edge on mycorrhizal density on the fine roots of Norway spruce

Cited by 7 publications

References 27 publications

Fine roots of Picea abies compensate for drought stress in the rainfall reduction experiment

Fine roots of Picea abies compensate for drought stress in the rainfall reduction experiment

Salvage felling in the Slovak Republic’s forests during the last twenty years (1998–2017)

Methods for Quantification of the Decline Phenomenon and Determination of the Vulnerability Degree for the Oak Stands in Northwestern Transylvania, Romania

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