Table 2.

Model parameters defining net photosynthesis rate (Farquhar–von Caemmerer–Berry model) of leaves at different positions in the canopy

Position	Jmax (μmol e m−2 s−1)	Vcmax (μmol CO2 m−2 s−1)	Vcmax/J (–)	α (μmol e− μmol−1)	θ (–)
Top	178·7	78·8	0·44	0·53	0·49
Middle	126·7	54·0	0·43	0·46	0·82
Base	106·5	44·9	0·42	0·43	0·83
Light bent	102·4	45·4	0·44	0·50	0·77
Shade bent	67·0	30·5	0·46	0·38	0·56

Parameters are based on measurements made in a developed ‘Akito’ rose canopy in October 2008.