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Asymmetrical effect...
Asymmetrical effects of mesophyll conductance on fundamental photosynthetic parameters and their relationships estimated from leaf gas exchange measurements
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- Sun, Ying (författare)
- University of Texas at Austin, Austin, USA
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- Gu, Lianhong (författare)
- Oak Ridge National Laboratory, USA
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- Dickinson, Robert E. (författare)
- University of Texas at Austin, USA
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- Pallardy, Stephen G. (författare)
- University of Missouri, USA
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- Baker, John (författare)
- University of Minnesota, USA
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- Cao, Yonghui (författare)
- Chinese Academy of Forestry, China
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- Damatta, Fábio Murilo (författare)
- Universidade Federal de Viçosa, Brazil
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- Dong, Xuejun (författare)
- North Dakota State University, USA
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- Ellsworth, David (författare)
- University of Western Sydney, Australia
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- Van Goethem, Davina (författare)
- University of Antwerp, Belgium
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- Jensen, Anna M. (författare)
- Oak Ridge National Laboratory, USA
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- Law, Beverly E. (författare)
- Oregon State University, USA
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- Loos, Rodolfo (författare)
- Technology Center, Fibria Celulose S.A, Aracruz, Brazil
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- Martins, Samuel C. Vitor (författare)
- Universidade Federal de Viçosa, Brazil
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- Norby, Richard J. (författare)
- Oak Ridge National Laboratory, USA
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- Warren, Jeffrey M. (författare)
- Oak Ridge National Laboratory, USA
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- Weston, David (författare)
- Oak Ridge National Laboratory, USA
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- Winter, Klaus (författare)
- Smithsonian Tropical Research Institute, Republic of Panama
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(creator_code:org_t)
- 2013-11-08
- 2014
- Engelska.
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Ingår i: Plant, Cell and Environment. - : John Wiley & Sons. - 0140-7791 .- 1365-3040. ; 37:4, s. 978-994
- Relaterad länk:
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http://onlinelibrary...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Worldwide measurements of nearly 130 C3 species covering all major plant functional types are analysed in conjunction with model simulations to determine the effects of mesophyll conductance (gm) on photosynthetic parameters and their relationships estimated fromA/Ci curves. We find that an assumption of infinite gm results in up to 75% underestimation for maximum carboxylation rate Vcmax, 60% for maximum electron transport rate Jmax, and 40% for triose phosphate utilization rate Tu. Vcmax is most sensitive, Jmax is less sensitive, and Tuhas the least sensitivity to the variation of gm. Because of this asymmetrical effect of gm, the ratios of Jmax to Vcmax, Tu to Vcmax and Tu toJmax are all overestimated. An infinite gm assumption also limits the freedom of variation of estimated parameters and artificially constrains parameter relationships to stronger shapes. These findings suggest the importance of quantifying gm for understanding in situphotosynthetic machinery functioning. We show that a nonzero resistance to CO2 movement in chloroplasts has small effects on estimated parameters. A non-linear function with gm as input is developed to convert the parameters estimated under an assumption of infinite gm to proper values. This function will facilitate gm representation in global carbon cycle models.
Ämnesord
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)
Nyckelord
- A/Ci curves; carbon cycle model; leaf photosynthesis; LeafWeb; parameter estimation
- Forestry and Wood Technology
- Skog och träteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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- Av författaren/redakt...
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Sun, Ying
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Gu, Lianhong
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Dickinson, Rober ...
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Pallardy, Stephe ...
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Baker, John
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Cao, Yonghui
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visa fler...
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Damatta, Fábio M ...
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Dong, Xuejun
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Ellsworth, David
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Van Goethem, Dav ...
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Jensen, Anna M.
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Law, Beverly E.
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Loos, Rodolfo
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Martins, Samuel ...
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Norby, Richard J ...
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Warren, Jeffrey ...
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Weston, David
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Winter, Klaus
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visa färre...
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- NATURVETENSKAP
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NATURVETENSKAP
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och Biologi
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och Botanik
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- LANTBRUKSVETENSKAPER
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LANTBRUKSVETENSK ...
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och Lantbruksvetensk ...
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och Skogsvetenskap
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