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Fitting photosynthetic carbon dioxide response curves for C 3 leaves

Plant, cell and environment, 2007-09, Vol.30 (9), p.1035-1040 [Peer Reviewed Journal]

ISSN: 0140-7791 ;EISSN: 1365-3040 ;DOI: 10.1111/j.1365-3040.2007.01710.x

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  • Title:
    Fitting photosynthetic carbon dioxide response curves for C 3 leaves
  • Author: SHARKEY, THOMAS D. ; BERNACCHI, CARL J. ; FARQUHAR, GRAHAM D. ; SINGSAAS, ERIC L.
  • Is Part Of: Plant, cell and environment, 2007-09, Vol.30 (9), p.1035-1040
  • Description: ABSTRACT Photosynthetic responses to carbon dioxide concentration can provide data on a number of important parameters related to leaf physiology. Methods for fitting a model to such data are briefly described. The method will fit the following parameters: V cmax , J , TPU , R d and g m [maximum carboxylation rate allowed by ribulose 1·5‐bisphosphate carboxylase/oxygenase (Rubisco), rate of photosynthetic electron transport (based on NADPH requirement), triose phosphate use, day respiration and mesophyll conductance, respectively]. The method requires at least five data pairs of net CO 2 assimilation ( A ) and [CO 2 ] in the intercellular airspaces of the leaf ( C i ) and requires users to indicate the presumed limiting factor. The output is (1) calculated CO 2 partial pressure at the sites of carboxylation, C c , (2) values for the five parameters at the measurement temperature and (3) values adjusted to 25 °C to facilitate comparisons. Fitting this model is a way of exploring leaf level photosynthesis. However, interpreting leaf level photosynthesis in terms of underlying biochemistry and biophysics is subject to assumptions that hold to a greater or lesser degree, a major assumption being that all parts of the leaf are behaving in the same way at each instant.
  • Language: English
  • Identifier: ISSN: 0140-7791
    EISSN: 1365-3040
    DOI: 10.1111/j.1365-3040.2007.01710.x
  • Source: Alma/SFX Local Collection
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