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Large variation in whole-plant water-use efficiency among tropical tree species

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dc.contributor.author Cernusak, Lucas A. en
dc.contributor.author Aranda, Jorge E. en
dc.contributor.author Marshall, John D. en
dc.contributor.author Winter, Klaus en
dc.date.accessioned 2012-08-08T12:40:19Z
dc.date.available 2012-08-08T12:40:19Z
dc.date.issued 2006
dc.identifier.citation Cernusak, Lucas A., Aranda, Jorge E., Marshall, John D., and Winter, Klaus. 2006. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F18693">Large variation in whole-plant water-use efficiency among tropical tree species</a>." <em>New Phytologist</em>. 173 (2):294&ndash;305. <a href="https://doi.org/10.1111/j.1469-8137.2006.01913.x">https://doi.org/10.1111/j.1469-8137.2006.01913.x</a> en
dc.identifier.issn 0028-646X
dc.identifier.uri http://hdl.handle.net/10088/18693
dc.description.abstract Summary . It is well known that whole-plant water-use efficiency (transpiration efficiency of carbon gain, TEC) varies among plant species with different photosynthetic pathways. However, less is known of such variation among tree species within the C3 group. Here we measured the TEC of seven C3 tropical tree species. Isotopic analyses (delta13C, delta18O, and delta15N) and elemental analyses (carbon and nitrogen) were undertaken to provide insight into sources of variation in TEC. . Plants were grown over several months in approx. 80% full sunlight in individual 38-l containers in the Republic of Panama. Soil moisture content was nonlimiting. . Significant variation was observed in TEC among the C3 tree species. Values ranged from 1.6 mmol C mol-1 H2O for teak (Tectona grandis) to 4.0 mmol C mol-1 H2O for a legume, Platymiscium pinnatum. . Variation in TEC was correlated with both leaf N concentration, a proxy for photosynthetic capacity, and oxygen-isotope enrichment, a proxy for stomatal conductance. The TEC varied with C-isotope discrimination within species, but the relationship broke down among species, reflecting the existence of species-specific offsets. en
dc.relation.ispartof New Phytologist en
dc.title Large variation in whole-plant water-use efficiency among tropical tree species en
dc.type Journal Article en
dc.identifier.srbnumber 110812
dc.identifier.doi 10.1111/j.1469-8137.2006.01913.x
rft.jtitle New Phytologist
rft.volume 173
rft.issue 2
rft.spage 294
rft.epage 305
dc.description.SIUnit STRI en
dc.citation.spage 294
dc.citation.epage 305

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