Pepper plants (Capsicum annuum L.cv.Zlaten Medal) were grown on nutrient solution without nitrogen, and photosynthetic response of plants was examined by determination of leaf CO2 fixation and chlorophyll and carotenoid contents.
The absence of nitrogen in the medium resulted in a decrease of the leaf area and of plant Cookware biomass accumulation, and in an increase of the root-shoot dry weight ratio.The photosynthetic activity and chlorophyll and carotenoid contents decreased significantly under nitrogen deprivation.Examination of nitrogen deficient leaves by transmission electron microscopy showed dramatic changes in chloroplast ultrastructure.
The proportion of starch granules and plastoglobules in the stroma matrix was increased and internal membrane system was greatly reduced.It seems that nitrogen plays an important role in Hats the formation of chloroplast structure and hence to the photosynthetic intensity and productivity of pepper plants.