Drought affects tracheid structure, dehydrin expression, and above- and belowground growth in 5-year-old Norway spruce

Eldhuset, Toril D.; Nagy, Nina Elisabeth; Volařík, Daniel; Børja, Isabella; Gebauer, Roman; Yakovlev, Igor; Krokene, Paal

doi:10.1007/s11104-012-1432-z

Cited by 54 publications

(47 citation statements)

References 57 publications

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“…For example, drought may affect RL with decrease (Guha, Rasineni, & Reddy, 2010), increase (Chiatante, Di Iorio, & Scippa, 2005;Manoharan et al, 2010), or no effect (Mori & Inagaki, 2012;Yang et al, 2012). Similarly, the responses of other root traits (e.g., RD, SRL) to drought also varied (Asfaw & Blair, 2012;Eldhuset et al, 2013;Fotelli, Geßler, Peuke, & Rennenberg, 2001). These highly diverse results may result from the difference in extent of drought and speed at which soil moisture is depleted (Chapin, Matson, & Mooney, 2002;Comas, Becker, Cruz, Byrne, & Dierig, 2013).…”

Section: Drought Effects On Root Traits and Responses Investigated Inmentioning

confidence: 99%

“…These results might be attributed to the following mechanisms. First, drought stress could directly increase RM by depleting starch and sugar reserves (Maguire & Kobe, 2015) and indirectly inhibit photosynthate transportation to the root system (Hasibeder, Fuchslueger, Fritz, Richter, & Bahn, 2014;Marshall, 1986 decreases root production (Eldhuset et al, 2013;Nagajothi, Sheeba, & Bangarusamy, 2014).…”

Section: Drought-induced Changes In Rb and Its Relationships With Mmentioning

confidence: 99%

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Drought‐induced changes in root biomass largely result from altered root morphological traits: Evidence from a synthesis of global field trials

Zhou

Nie

et al. 2018

Plant Cell & Environment

138

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Extreme drought is likely to become more frequent and intense as a result of global climate change, which may significantly impact plant root traits and responses (i.e., morphology, production, turnover, and biomass). However, a comprehensive understanding of how drought affects root traits and responses remains elusive. Here, we synthesized data from 128 published studies under field conditions to examine the responses of 17 variables associated with root traits to drought. Our results showed that drought significantly decreased root length and root length density by 38.29% and 11.12%, respectively, but increased root diameter by 3.49%. However, drought significantly increased root:shoot mass ratio and root cortical aerenchyma by 13.54% and 90.7%, respectively. Our results suggest that drought significantly modified root morphological traits and increased root mortality, and the drought-induced decrease in root biomass was less than shoot biomass, causing higher root:shoot mass ratio. The cascading effects of drought on root traits and responses may need to be incorporated into terrestrial biosphere models to improve prediction of the climate-biosphere feedback.

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Section: Drought Effects On Root Traits and Responses Investigated Inmentioning

confidence: 99%

Section: Drought-induced Changes In Rb and Its Relationships With Mmentioning

confidence: 99%

Drought‐induced changes in root biomass largely result from altered root morphological traits: Evidence from a synthesis of global field trials

Zhou

Nie

et al. 2018

Plant Cell & Environment

138

View full text Add to dashboard Cite

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“…), changed expression of dehydrin genes (Eldhuset et al. ), inhibition of shoot growth (Chaves et al. ), and reduced root longevity (Meier and Leuschner ).…”

Section: Introductionmentioning

confidence: 99%

“…However, studies on anatomical adaptation of Norway spruce needles to drought are rare and seem to be limited to our recent greenhouse study on 5‐year‐old plants (Eldhuset et al. ) and a study on needle vascular cylinder area in young saplings in open‐top chambers (Kivimäenpää et al. ).…”

Section: Introductionmentioning

confidence: 99%

Effects of prolonged drought on the anatomy of sun and shade needles in young Norway spruce trees

Gebauer

Volařík

Urban

et al. 2015

Ecology and Evolution

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Predicted increases in the frequency and duration of drought are expected to negatively affect tree vitality, but we know little about how water shortage will influence needle anatomy and thereby the trees’ photosynthetic and hydraulic capacity. In this study, we evaluated anatomical changes in sun and shade needles of 20‐year‐old Norway spruce trees exposed to artificial drought stress. Canopy position was found to be important for needle structure, as sun needles had significantly higher values than shade needles for all anatomical traits (i.e., cross‐sectional needle area, number of tracheids in needle, needle hydraulic conductivity, and tracheid lumen area), except proportion of xylem area per cross‐sectional needle area. In sun needles, drought reduced all trait values by 10–40%, whereas in shade needles, only tracheid maximum diameter was reduced by drought. Due to the relatively weaker response of shade needles than sun needles in drought‐stressed trees, the difference between the two needle types was reduced by 25% in the drought‐stressed trees compared to the control trees. The observed changes in needle anatomy provide new understanding of how Norway spruce adapts to drought stress and may improve predictions of how forests will respond to global climate change.

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“…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). These contradictory results are suggesting that the response of fine root biomass to drought is not uniform.…”

Section: Discussionmentioning

confidence: 97%

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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Drought affects tracheid structure, dehydrin expression, and above- and belowground growth in 5-year-old Norway spruce

Cited by 54 publications

References 57 publications

Drought‐induced changes in root biomass largely result from altered root morphological traits: Evidence from a synthesis of global field trials

Drought‐induced changes in root biomass largely result from altered root morphological traits: Evidence from a synthesis of global field trials

Effects of prolonged drought on the anatomy of sun and shade needles in young Norway spruce trees

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

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