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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1111/nph.15907
|2 doi
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|a pubmed24n0990.xml
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|a (DE-627)NLM297006452
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|a (NLM)31081546
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Stutz, Samantha S
|e verfasserin
|4 aut
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| 245 |
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|a Contribution and consequences of xylem-transported CO2 assimilation for C3 plants
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|c 2019
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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 Completed 28.02.2020
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2019 The Authors. New Phytologist © 2019 New Phytologist Trust.
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|a Traditionally, leaves were thought to be supplied with CO2 for photosynthesis by the atmosphere and respiration. Recent studies, however, have shown that the xylem also transports a significant amount of inorganic carbon into leaves through the bulk flow of water. However, little is known about the dynamics and proportion of xylem-transported CO2 that is assimilated, vs simply lost to transpiration. Cut leaves of Populus deltoides and Brassica napus were placed in either KCl or one of three [NaH13 CO3 ] solutions dissolved in water to simultaneously measure the assimilation and the efflux of xylem-transported CO2 exiting the leaf across light and CO2 response curves in real-time using a tunable diode laser absorption spectroscope. The rates of assimilation and efflux of xylem-transported CO2 increased with increasing xylem [13 CO2 *] and transpiration. Under saturating irradiance, rates of assimilation using xylem-transported CO2 accounted for c. 2.5% of the total assimilation in both species in the highest [13 CO2 *]. The majority of xylem-transported CO2 is assimilated, and efflux is small compared to respiration. Assimilation of xylem-transported CO2 comprises a small portion of total photosynthesis, but may be more important when CO2 is limiting
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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 Brassica napus
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|a Populus deltoides
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|a CO2 efflux
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|a internally transported CO2
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|a leaf photosynthesis models
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|a stem [CO2*]
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|a tunable diode laser absorption spectroscopy
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|a xylem-transported CO2
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|a Carbon Dioxide
|2 NLM
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|a 142M471B3J
|2 NLM
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|a Carbon
|2 NLM
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|a 7440-44-0
|2 NLM
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| 700 |
1 |
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|a Hanson, David T
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 223(2019), 3 vom: 12. Aug., Seite 1230-1240
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
1 |
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|g volume:223
|g year:2019
|g number:3
|g day:12
|g month:08
|g pages:1230-1240
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|u http://dx.doi.org/10.1111/nph.15907
|3 Volltext
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