Photosynthesis and respiration in winter rape plants (Brassica napus) enriched with anthocyanin's under influence of 5-aminolevulinic acid
The stimulating effect of 5-aminolevulinic acid (ALA) at a concentration of 200 mg/l on respiratory activity was established by accumulating non-covalently bound to the proteins heme and increasing the activity of the heme-containing enzyme cytochrome c-oxidase, as well as increasing the rate of oxygen absorption in the respiration of winter rape with high content of anthocyanin's. The inhibitory effect of ALA on the structural organization and photosynthetic activity of the photosynthetic apparatus was revealed. A decrease in the level of photosynthetic pigments - chlorophyll a and b, reduction in protein content of chlorophyll-protein complexes of two photosystems, as well as decrease in the ability of plants to release oxygen were demonstrated.