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231224s2017 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erx071
|2 doi
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|a pubmed25n0904.xml
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|a eng
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|a Slot, Martijn
|e verfasserin
|4 aut
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|a Photosynthetic acclimation to warming in tropical forest tree seedlings
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|c 2017
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 13.07.2018
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|a Date Revised 26.03.2024
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|a published: Print
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|a Dryad: 10.5061/dryad.r11c0
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|a Citation Status MEDLINE
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|a © The Author 2017. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a Tropical forests have a mitigating effect on man-made climate change by acting as a carbon sink. For that effect to continue, tropical trees will have to acclimate to rising temperatures, but it is currently unknown whether they have this capacity. We grew seedlings of three tropical tree species over a range of temperature regimes (TGrowth = 25, 30, 35 °C) and measured the temperature response of photosynthetic CO2 uptake. All species showed signs of acclimation: the temperature-response curves shifted, such that the temperature at which photosynthesis peaked (TOpt) increased with increasing TGrowth. However, although TOpt shifted, it did not reach TGrowth at high temperature, and this difference between TOpt and TGrowth increased with increasing TGrowth, indicating that plants were operating at supra-optimal temperatures for photosynthesis when grown at high temperatures. The high-temperature CO2 compensation point did not increase with TGrowth. Hence, temperature-response curves narrowed with increasing TGrowth. TOpt correlated with the ratio of the RuBP regeneration capacity over the RuBP carboxylation capacity, suggesting that at high TGrowth photosynthetic electron transport rate associated with RuBP regeneration had greater control over net photosynthesis. The results show that although photosynthesis of tropical trees can acclimate to moderate warming, carbon gain decreases with more severe warming
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Carbon uptake
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|a JMax
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|a VCMax.
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| 650 |
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|a climate change
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| 650 |
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|a dark respiration
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| 650 |
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|a global warming
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| 650 |
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|a photosynthesis
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|a temperature-response curve
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| 650 |
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|a thermal acclimation
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|a tropical forest
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|a Winter, Klaus
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 68(2017), 9 vom: 01. Apr., Seite 2275-2284
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:68
|g year:2017
|g number:9
|g day:01
|g month:04
|g pages:2275-2284
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|u http://dx.doi.org/10.1093/jxb/erx071
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