The validity of optimal leaf traits modelled on environmental conditions

The validity of optimal leaf traits modelled on environmental conditions

© 2018 The Authors. New Phytologist © 2018 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 221(2019), 3 vom: 15. Feb., Seite 1409-1423
1. Verfasser: Bloomfield, Keith J (VerfasserIn)
Weitere Verfasser: Prentice, I Colin, Cernusak, Lucas A, Eamus, Derek, Medlyn, Belinda E, Rumman, Rizwana, Wright, Ian J, Boer, Matthias M, Cale, Peter, Cleverly, James, Egerton, John J G, Ellsworth, David S, Evans, Bradley J, Hayes, Lucy S, Hutchinson, Michael F, Liddell, Michael J, Macfarlane, Craig, Meyer, Wayne S, Togashi, Henrique F, Wardlaw, Tim, Zhu, Lingling, Atkin, Owen K
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't aridity photosynthesis stable isotopes stomatal conductance (gs) temperature water-use efficiency Carbon Isotopes
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245 1 4 |a The validity of optimal leaf traits modelled on environmental conditions 
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520 |a © 2018 The Authors. New Phytologist © 2018 New Phytologist Trust. 
520 |a The ratio of leaf intercellular to ambient CO2 (χ) is modulated by stomatal conductance (gs ). These quantities link carbon (C) assimilation with transpiration, and along with photosynthetic capacities (Vcmax and Jmax ) are required to model terrestrial C uptake. We use optimization criteria based on the growth environment to generate predicted values of photosynthetic and water-use efficiency traits and test these against a unique dataset. Leaf gas-exchange parameters and carbon isotope discrimination were analysed in relation to local climate across a continental network of study sites. Sun-exposed leaves of 50 species at seven sites were measured in contrasting seasons. Values of χ predicted from growth temperature and vapour pressure deficit were closely correlated to ratios derived from C isotope (δ13 C) measurements. Correlations were stronger in the growing season. Predicted values of photosynthetic traits, including carboxylation capacity (Vcmax ), derived from δ13 C, growth temperature and solar radiation, showed meaningful agreement with inferred values derived from gas-exchange measurements. Between-site differences in water-use efficiency were, however, only weakly linked to the plant's growth environment and did not show seasonal variation. These results support the general hypothesis that many key parameters required by Earth system models are adaptive and predictable from plants' growth environments 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a aridity 
650 4 |a photosynthesis 
650 4 |a stable isotopes 
650 4 |a stomatal conductance (gs) 
650 4 |a temperature 
650 4 |a water-use efficiency 
650 7 |a Carbon Isotopes  |2 NLM 
700 1 |a Prentice, I Colin  |e verfasserin  |4 aut 
700 1 |a Cernusak, Lucas A  |e verfasserin  |4 aut 
700 1 |a Eamus, Derek  |e verfasserin  |4 aut 
700 1 |a Medlyn, Belinda E  |e verfasserin  |4 aut 
700 1 |a Rumman, Rizwana  |e verfasserin  |4 aut 
700 1 |a Wright, Ian J  |e verfasserin  |4 aut 
700 1 |a Boer, Matthias M  |e verfasserin  |4 aut 
700 1 |a Cale, Peter  |e verfasserin  |4 aut 
700 1 |a Cleverly, James  |e verfasserin  |4 aut 
700 1 |a Egerton, John J G  |e verfasserin  |4 aut 
700 1 |a Ellsworth, David S  |e verfasserin  |4 aut 
700 1 |a Evans, Bradley J  |e verfasserin  |4 aut 
700 1 |a Hayes, Lucy S  |e verfasserin  |4 aut 
700 1 |a Hutchinson, Michael F  |e verfasserin  |4 aut 
700 1 |a Liddell, Michael J  |e verfasserin  |4 aut 
700 1 |a Macfarlane, Craig  |e verfasserin  |4 aut 
700 1 |a Meyer, Wayne S  |e verfasserin  |4 aut 
700 1 |a Togashi, Henrique F  |e verfasserin  |4 aut 
700 1 |a Wardlaw, Tim  |e verfasserin  |4 aut 
700 1 |a Zhu, Lingling  |e verfasserin  |4 aut 
700 1 |a Atkin, Owen K  |e verfasserin  |4 aut 
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