Effect of photoperiod length on leaf ontogenesis in spinach plants (Spinacia oleracea var Nobel) as related to photosynthetic O2 Produktion : RuBisCo capacity and total sugar content

The acclimation to increased photoperiod length was studied in vegetative and floral spinach plants with respect to changes in photosynthetic activity, ontogenesis and dry weight yield. Heterogeneity in size and physiological activity between the primary and secondary leaves was found under short day as well as upon transfer to continuous light. The secondary leaves emerge in SD conditions at a ti…