†Δ18Oe was calculated from δ18OLWpm.
‡Calulation of Lv made by using the partial volume of vascular tissue including the entire midrib asθ x.
§Partial volume of vascular tissue including the entire midrib
¶WT and cslf6-2 were significantly greater thancslf6-1 , and 1000 μmol photons m-2s-1 was significantly greater than 300 μmol photons m-2 s-1. Proportion of leaf volume found in the vessels and midrib was used for proportion of xylem water (θ x) in the xylem Péclet model.
Table 3. Xylem Péclet model (Eqn. 11) fitted to f sw (1 - Δ18OLW/Δ18Oe) and E data. Unknowns were L v andϕ x in the xylem Péclet model. Values are ± SE.L v was calculated again when ϕxwas considered the partial volume of either total vasculature, veins including the bundle sheath (V + BS) or excluding the sheath (V - BS), or xylem. Means within each species and each column followed by different letters are significantly different.