CHANGES OF NICOTINAMIDE COENZYMES AND ADENYLATE ENERGY-CHARGE IN LEAVES OF HYBRID AND PARENTAL TOMATO FORMS IN AN IN-VITRO CULTURE

Interrelation between dry matter in leaves and catabolic and anabolic activity in parental forms and F-1-hybrids of Lycopersicon esculentum Mill was investigated under in vitro culture. Heterosis in dry matter was observed in hybrids and similar values of adenylate energy charge (AEC) and the redox charge (RC), displaying balance between the system s generating energy and the processes associated with its consumption, were revealed. A higher recovery degree of NADP-NADPH system in compa rison with NAD-NADH one, showing inutilization of recovery equivalents in the NADPH form in biosynthetic processes, was detected in the init ial cultivars. The content of adenylate nucleotides, nicotinamide coen zymes and their changes might play a role in regulatory mechanisms of biomass accumulation in F-1-tomato hybrids and their parents.