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|a 10.1093/jxb/erae089
|2 doi
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|a eng
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|a Zhang, Yuqi
|e verfasserin
|4 aut
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|a Short-term salt stress reduces photosynthetic oscillations under triose phosphate utilization limitation in tomato
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|c 2024
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|a Text
|b txt
|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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|a Date Completed 20.05.2024
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|a Date Revised 27.07.2024
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|a published: Print
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|a Citation Status MEDLINE
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|a © The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For commercial re-use, please contact reprintsoup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.
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|a Triose phosphate utilization (TPU) limitation is one of the three biochemical limitations of photosynthetic CO2 assimilation rate in C3 plants. Under TPU limitation, abrupt and large transitions in light intensity cause damped oscillations in photosynthesis. When plants are salt-stressed, photosynthesis is often down-regulated particularly under dynamic light intensity, but how salt stress affects TPU-related dynamic photosynthesis is still unknown. To elucidate this, tomato (Solanum lycopersicum) was grown with and without sodium chloride (NaCl, 100 mM) stress for 13 d. Under high CO2 partial pressure, rapid increases in light intensity caused profound photosynthetic oscillations. Salt stress reduced photosynthetic oscillations in leaves initially under both low- and high-light conditions and reduced the duration of oscillations by about 2 min. Besides, salt stress increased the threshold for CO2 partial pressure at which oscillations occurred. Salt stress increased TPU capacity without affecting Rubisco carboxylation and electron transport capacity, indicating the up-regulation of end-product synthesis capacity in photosynthesis. Thus salt stress may reduce photosynthetic oscillations by decreasing leaf internal CO2 partial pressure and/or increasing TPU capacity. Our results provide new insights into how salt stress modulates dynamic photosynthesis as controlled by CO2 availability and end-product synthesis
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|a Journal Article
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|a Dynamic light
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|a TPU limitation
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|a gas exchange
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|a salt stress
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|a tomato
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|a triose phosphate utilization
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|a Kaiser, Elias
|e verfasserin
|4 aut
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|a Dutta, Satadal
|e verfasserin
|4 aut
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|a Sharkey, Thomas D
|e verfasserin
|4 aut
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|a Marcelis, Leo F M
|e verfasserin
|4 aut
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| 700 |
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|a Li, Tao
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 75(2024), 10 vom: 20. Mai, Seite 2994-3008
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:75
|g year:2024
|g number:10
|g day:20
|g month:05
|g pages:2994-3008
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|u http://dx.doi.org/10.1093/jxb/erae089
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