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Statements

Subject Item
n2:RIV%2F62156489%3A43410%2F13%3A00192262%21RIV14-MSM-43410___
rdf:type
skos:Concept n9:Vysledek
dcterms:description
Drought-induced tree susceptibility is a major risk associated with climate change. Here we report how an 11-week drought affected tracheid structure, gene expression, and above- and belowground growth in 5-year-old Norway spruce trees (Picea abies) under controlled conditions. The canopy of trees subjected to severe drought had significantly less urrent-year needle biomass, and fewer tracheids and tracheid rows in current-year shoots compared to fully watered control trees. Belowground tissues were more strongly affected by drought than aboveground tissues. In fine roots (<2 mm diameter) severe drought significantly reduced root biomass, root diameter, root length density and root surface area per soil volume compared to the control. Tracheid diameter and hydraulic conductivity in fine roots were significantly lower and tracheid flatness higher in trees subjected to severe drought than in control trees, both for long and short roots. Transcripts of the drought-related dehydrins PaDhn1 and PaDhn6 were strongly upregulated in stem bark and current-year needles in response to drought, whereas PaDhn4.5 was down-regulated. Conclusions This study demonstrates that drought reduces biomass and hydraulic conductivity in fine roots and needles. We suggest that the ratio between PaDhn6 and PaDhn4.5 may be a sensitive marker of drought stress in Norway spruce. Drought-induced tree susceptibility is a major risk associated with climate change. Here we report how an 11-week drought affected tracheid structure, gene expression, and above- and belowground growth in 5-year-old Norway spruce trees (Picea abies) under controlled conditions. The canopy of trees subjected to severe drought had significantly less urrent-year needle biomass, and fewer tracheids and tracheid rows in current-year shoots compared to fully watered control trees. Belowground tissues were more strongly affected by drought than aboveground tissues. In fine roots (<2 mm diameter) severe drought significantly reduced root biomass, root diameter, root length density and root surface area per soil volume compared to the control. Tracheid diameter and hydraulic conductivity in fine roots were significantly lower and tracheid flatness higher in trees subjected to severe drought than in control trees, both for long and short roots. Transcripts of the drought-related dehydrins PaDhn1 and PaDhn6 were strongly upregulated in stem bark and current-year needles in response to drought, whereas PaDhn4.5 was down-regulated. Conclusions This study demonstrates that drought reduces biomass and hydraulic conductivity in fine roots and needles. We suggest that the ratio between PaDhn6 and PaDhn4.5 may be a sensitive marker of drought stress in Norway spruce.
dcterms:title
Drought affects tracheid structure, dehydrin expression, and above- and belowground growth in 5-year-old Norway spruce Drought affects tracheid structure, dehydrin expression, and above- and belowground growth in 5-year-old Norway spruce
skos:prefLabel
Drought affects tracheid structure, dehydrin expression, and above- and belowground growth in 5-year-old Norway spruce Drought affects tracheid structure, dehydrin expression, and above- and belowground growth in 5-year-old Norway spruce
skos:notation
RIV/62156489:43410/13:00192262!RIV14-MSM-43410___
n9:predkladatel
n10:orjk%3A43410
n3:aktivita
n12:P
n3:aktivity
P(7F09086)
n3:cisloPeriodika
1-2
n3:dodaniDat
n15:2014
n3:domaciTvurceVysledku
n19:1598481 n19:1943111
n3:druhVysledku
n11:J
n3:duvernostUdaju
n18:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
70607
n3:idVysledku
RIV/62156489:43410/13:00192262
n3:jazykVysledku
n8:eng
n3:klicovaSlova
drought; biomass; Norway spruce (Picea abies)
n3:klicoveSlovo
n6:Norway%20spruce%20%28Picea%20abies%29 n6:biomass n6:drought
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[653472934B0D]
n3:nazevZdroje
Plant and Soil
n3:obor
n20:GK
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
7
n3:projekt
n4:7F09086
n3:rokUplatneniVysledku
n15:2013
n3:svazekPeriodika
366
n3:tvurceVysledku
Volařík, Daniel Yakovlev, Igor Nagy, Nina Elisabeth Gebauer, Roman Borja, Isabella Eldhuset, Toril Drablos Krokene, Paal
n3:wos
317988600022
s:issn
0032-079X
s:numberOfPages
16
n13:doi
10.1007/s11104-012-1432-z
n14:organizacniJednotka
43410