A model analysis of the photosynthetic response of Vitis vinifera L. cvs Riesling and Chasselas leaves in the field: I. Interaction of age, light and temperature

摘要

The photosynthetic activity (A) of leaves of differ- ent ages on primary and secondary shoots of Riesling and Chasselas vines was measured under field condi- tons in relation to photon flux density (PFD) at vari- ous leaf temperatures. The data sets from 4 years and two locations (Geisenheim, Germany; Changins, Swit- zerland) were analysed using non-linear regression models to determine possible genetic and/or climate- induced differences in the light and temperature re- sponse between different leaf ages.