IDENTIFICATION OF CHANGES IN THE METABOLIC PROCESSES OF GERMINATION AND GROWTH OF MAIZE SEEDLINGS UNDER THE INFLUENCE OF HEAT STRESS AND THE USE OF REGLALG

Rezumat

Laboratory experiments were carried out to determine the effect of pretreatment of seeds of two hybrids of maize (Zea mays L.) with Reglalg and subsequent exposure to heat stress (HS) of 50°C for 30 min on seed germination, seedling growth and assessment of translocation of endosperm reserve substances for these processes. The results showed a positive effect of Reglalg on seed germination and seedling growth parameters, which were affected by HS conditions. The use of Reglalg to treat the seeds of maize hybrids before expose to HS, had a beneficial effect on the formation of seedling biomass due to an increase in the mass of endosperm translocated from seeds to these processes under the conditions of stress. Also, the use of Reglalg in seed pretreatment favored the decrease in endosperm mass consumed for cellular metabolism respiration under HS.