Fig. 9.

The influence of variation in: (A) photosynthetically active radiation (PAR, µmol m^–2 s^–1) and (B) transpiration rate (E, mmol m^–2 s^–1) on leaf hydraulic conductance (k _leaf, mmol m^–2 s^–1 MPa^–1). The dotted lines in A show the ‘light–g-effect’ on k _leaf for leaves at a common leaf to air vapour pressure difference (VPD). In all cases where greater light interception resulted in an increase in k _leaf, at a common VPD, there was a light induced increase in g and by extension E.