Impact of Leaf Traits on Temporal Dynamics of Transpired Oxygen Isotope Signatures and Its Impact on Atmospheric Vapor.

ABSTRACT: Oxygen isotope signatures of transpiration (δ _E ) are powerful tracers of water movement from plant to global scale. However, a mechanistic understanding of how leaf morphological/physiological traits effect δ _E is missing. A laser spectrometer was coupled to a leaf-level gas-exchange system to measure fluxes and isotopic signatures of plant transpiration under controlled conditions in seven distinct species (Fagus sylvatica, Pinus sylvestris, Acacia longifolia, Quercus suber, Coffea arabica, Plantago lanceolata, Oxalis triangularis). We analyzed the role of stomatal conductance (g_s ) and leaf water content (W) on the temporal dynamics of δ _E following changes in relative humidity (rH). Chan

SUBMITTER: Dubbert M 

PROVIDER: S-EPMC5241305 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature