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231225s1999 xx |||||o 00| ||eng c |
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|a 10.1046/j.1469-8137.1999.00541.x
|2 doi
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|a pubmed24n1080.xml
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|a (NLM)33862868
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Leverenz, J W
|e verfasserin
|4 aut
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| 245 |
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|a Responses of two provenances of Fagus sylvatica seedlings to a combination of four temperature and two CO2 treatments during their first growing season
|b gas exchange of leaves and roots
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| 264 |
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|c 1999
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 19.04.2021
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a Physiological responses of two provenances of European beech (Fagus sylvatica) were studied in seedlings grown at two [CO2 ] in combination with four temperature treatments. For the local Danish provenance, the average effect of elevated [CO2 ] during growth was to increase light-saturated net photosynthesis (An ) and instantaneous water-use efficiency or transpiration efficiency (ITE). These increases were strongly related to the temperature treatment. Stomatal conductance (gs ) was reduced in seedlings in high [CO2 ], but there was no statistically significant effect of temperature treatment. Stomatal conductance was 13-26% lower at elevated [CO2 ] and ITE was 89-156% higher, depending on growth temperature. The effects of [CO2 ] on An were considerably larger than those shown for many other woody species, but similar to those in other studies on European beech. The absolute value of An for a Romanian provenance of beech was 5-18% lower than in the Danish provenance at low [CO2 ] and 14-26% lower at high [CO2 ]. There was no statistically significant interaction between the provenances and [CO2 ], or between provenance and temperature. A model of the response of An to [CO2 ] at different temperatures gave predictions close to the measured results, except at the lowest temperature treatment where the model over-predicted the effect of elevated [CO2 ]. This and measurements of An made at a common, low [CO2 ] indicated a down-regulation of photosynthesis in the lowest temperature treatment at high [CO2 ]. Root plus soil respiration on a whole-tree basis (Rtr ) was increased by elevated [CO2 ] at all but the lowest temperature, but no effect was seen of [CO2 ] on root respiration per unit root d. wt. Mean Rtr on any given date was significantly correlated with An , except at the lowest temperature treatment. It is hypothesized that low temperature limited the ability of the roots to use photosynthates resulting in a feedback inhibition of An when elevated [CO2 ] was combined with low temperature
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|a Journal Article
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|a Fagus sylvatica
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| 650 |
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4 |
|a acclimation
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| 650 |
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|a elevated CO2
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| 650 |
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4 |
|a leaf gas exchange
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| 650 |
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4 |
|a provenance
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| 650 |
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4 |
|a root plus soil respiration
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| 650 |
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4 |
|a temperature
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| 700 |
1 |
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|a Bruhn, D
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Saxe, H
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 144(1999), 3 vom: 18. Dez., Seite 437-454
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:144
|g year:1999
|g number:3
|g day:18
|g month:12
|g pages:437-454
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|u http://dx.doi.org/10.1046/j.1469-8137.1999.00541.x
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|h 437-454
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