ASSESSMENT OF CRITICAL PERIODS OF GROWTH AND DEVELOPMENT OF OILSEED RADISH PLANTS (RAPHANUS SATIVUS L. VAR. OLEIFORMIS PERS.) ON THE BASIS OF CHLOROPHYLL FLUORESCENCE INDUCTION METHOD

The article highlights the results of studying critical periods in phenological development oilseed radish varieties based on use basic indicators chlorophyll fluorescence induction curve (initial (F0), plateau zone (Fpl), maximum (Fm), and stationary (Fst). This complex was applied to plants three – ‘Rayduga’, ‘Zhuravka’ ‘Lybid’ with presentation for variety due similarity obtained data. phases growth radish: cotyledon phase, budding flowering green pod phase yellow-green phase. Based a single-beam porous fluorimeter ‘Floratest’, developed by Research Engineering Center Microelectronics Institute Cybernetics named after V.M. Glushkova (Ukraine) formed curves (CFI) mode 90-second fixation parameters each plants.The system graphical display regularity formation CFI within main is analyzed generalizations conclusions concerning dynamics course photochemical physiological processes photosystem II are made. process stage changes corresponding morphogenesis plants. exogenous endogenous factors assimilative activity plant photosystems basis analysis position time points schedule substantiated predicted state possible assimilation activity. values baseline indication compared flowering, which defined as ensuring realization productive potential