Is stomatal conductance optimized over both time and space in plant crowns? A field test in grapevine (Vitis vinifera)
15 páginas.-- 13 figuras.-- 1 tabla.-- 64 referencias
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| Format: | artículo biblioteca |
| Language: | English |
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John Wiley & Sons
2014-05
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| Subjects: | Boundary layer, Carbon water balance, OptimizationStomata; Water-use efficiency, Stomata, Water-use efficiency, |
| Online Access: | http://hdl.handle.net/10261/97417 |
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dig-irnas-es-10261-974172018-09-11T07:56:17Z Is stomatal conductance optimized over both time and space in plant crowns? A field test in grapevine (Vitis vinifera) Buckley, Thomas N. Martorell, Sebastià Díaz-Espejo, Antonio Tomàs, Magdalena Medrano Gil, Hipólito Boundary layer Carbon water balance OptimizationStomata; Water-use efficiency Stomata Water-use efficiency 15 páginas.-- 13 figuras.-- 1 tabla.-- 64 referencias Crown carbon gain is maximized for a given total water loss if stomatal conductance (gs) varies such that the marginal carbon product of water (∂A/∂E) remains invariant both over time and among leaves in a plant crown, provided the curvature of assimilation rate (A) versus transpiration rate (E) is negative. We tested this prediction across distinct crown positions in situ for the first time by parameterizing a biophysical model across 14 positions in four grapevine crowns (Vitis vinifera), computing optimal patterns of gs and E over a day and comparing these to the observed patterns. Observed water use was higher than optimal for leaves in the crown interior, but lower than optimal in most other positions. Crown carbon gain was 18% lower under measured gs than under optimal gs. Positive curvature occurred in 39.6% of cases due to low boundary layer conductance (gbw), and optimal gs was zero in 11% of cases because ∂A/∂E was below the target value at all gs. Some conclusions changed if we assumed infinite gbw, but optimal and measured E still diverged systematically in time and space. We conclude that the theory's spatial dimension and assumption of positive curvature require further experimental testing This work was funded by the Spanish Ministry of Science and Innovation (research projects AGL2008-04525-C02-01, AGL2011-30408-C04-01 and AGL2009-11310/AGR). T.N.B. was supported by the US National Science Foundation (Award No. 1146514) and by the Grains Research and Development Corporation (GRDC). S.M. benefitted from a FPI grant BES-2009-016906 from the Spanish Ministry of Science and Innovation. Peer reviewed 2014-05-29T09:44:32Z 2014-05-29T09:44:32Z 2014-05 artículo http://purl.org/coar/resource_type/c_6501 Plant Cell and Environment (2014) 0140-7791 http://hdl.handle.net/10261/97417 10.1111/pce.12343 1365-3040 en Postprint http://dx.doi.org/10.1111/pce.12343 open John Wiley & Sons |
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biblioteca |
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Europa del Sur |
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Biblioteca del IRNAS España |
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English |
| topic |
Boundary layer Carbon water balance OptimizationStomata; Water-use efficiency Stomata Water-use efficiency Boundary layer Carbon water balance OptimizationStomata; Water-use efficiency Stomata Water-use efficiency |
| spellingShingle |
Boundary layer Carbon water balance OptimizationStomata; Water-use efficiency Stomata Water-use efficiency Boundary layer Carbon water balance OptimizationStomata; Water-use efficiency Stomata Water-use efficiency Buckley, Thomas N. Martorell, Sebastià Díaz-Espejo, Antonio Tomàs, Magdalena Medrano Gil, Hipólito Is stomatal conductance optimized over both time and space in plant crowns? A field test in grapevine (Vitis vinifera) |
| description |
15 páginas.-- 13 figuras.-- 1 tabla.-- 64 referencias |
| format |
artículo |
| topic_facet |
Boundary layer Carbon water balance OptimizationStomata; Water-use efficiency Stomata Water-use efficiency |
| author |
Buckley, Thomas N. Martorell, Sebastià Díaz-Espejo, Antonio Tomàs, Magdalena Medrano Gil, Hipólito |
| author_facet |
Buckley, Thomas N. Martorell, Sebastià Díaz-Espejo, Antonio Tomàs, Magdalena Medrano Gil, Hipólito |
| author_sort |
Buckley, Thomas N. |
| title |
Is stomatal conductance optimized over both time and space in plant crowns? A field test in grapevine (Vitis vinifera) |
| title_short |
Is stomatal conductance optimized over both time and space in plant crowns? A field test in grapevine (Vitis vinifera) |
| title_full |
Is stomatal conductance optimized over both time and space in plant crowns? A field test in grapevine (Vitis vinifera) |
| title_fullStr |
Is stomatal conductance optimized over both time and space in plant crowns? A field test in grapevine (Vitis vinifera) |
| title_full_unstemmed |
Is stomatal conductance optimized over both time and space in plant crowns? A field test in grapevine (Vitis vinifera) |
| title_sort |
is stomatal conductance optimized over both time and space in plant crowns? a field test in grapevine (vitis vinifera) |
| publisher |
John Wiley & Sons |
| publishDate |
2014-05 |
| url |
http://hdl.handle.net/10261/97417 |
| work_keys_str_mv |
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1777664762029539328 |