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|a 10.1093/jxb/erad084
|2 doi
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|a pubmed24n1179.xml
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|a (DE-627)NLM353893358
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|a (NLM)36883576
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|a DE-627
|b ger
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|a eng
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|a McClain, Alan M
|e verfasserin
|4 aut
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|a Rapid CO2 changes cause oscillations in photosynthesis that implicate PSI acceptor-side limitations
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|c 2023
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 22.05.2023
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|a Date Revised 04.06.2023
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|a published: Print
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|a Citation Status MEDLINE
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|a © The Author(s) 2023. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a Oscillations in CO2 assimilation rate and associated fluorescence parameters have been observed alongside the triose phosphate utilization (TPU) limitation of photosynthesis for nearly 50 years. However, the mechanics of these oscillations are poorly understood. Here we utilize the recently developed dynamic assimilation techniques (DATs) for measuring the rate of CO2 assimilation to increase our understanding of what physiological condition is required to cause oscillations. We found that TPU-limiting conditions alone were insufficient, and that plants must enter TPU limitation quickly to cause oscillations. We found that ramps of CO2 caused oscillations proportional in strength to the speed of the ramp, and that ramps induce oscillations with worse outcomes than oscillations induced by step change of CO2 concentration. An initial overshoot is caused by a temporary excess of available phosphate. During the overshoot, the plant outperforms steady-state TPU and ribulose 1,5-bisphosphate regeneration limitations of photosynthesis, but cannot exceed the rubisco limitation. We performed additional optical measurements which support the role of PSI reduction and oscillations in availability of NADP+ and ATP in supporting oscillations
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Research Support, N.I.H., Extramural
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|a ATP synthase
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|a Acceptor side limitation
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|a dynamic assimilation technique
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|a elevated CO2
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|a oscillation
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|a photosynthesis
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|a triose phosphate utilization
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|a Carbon Dioxide
|2 NLM
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|a 142M471B3J
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|a Trioses
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|a Monosaccharides
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|a Phosphates
|2 NLM
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|a Ribulose-Bisphosphate Carboxylase
|2 NLM
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| 650 |
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|a EC 4.1.1.39
|2 NLM
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| 700 |
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|a Sharkey, Thomas D
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 74(2023), 10 vom: 19. Mai, Seite 3163-3173
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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|g volume:74
|g year:2023
|g number:10
|g day:19
|g month:05
|g pages:3163-3173
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|u http://dx.doi.org/10.1093/jxb/erad084
|3 Volltext
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