The study of chlorophyll fluorescence (CF) parameters conducted in two strawberry. Measurements of their values were done twice: in an early autumn and late spring. Fluorescence of five dark-adapted mature leaves derived from each was measured in the laboratory at room temperature with the use of a portable pulse amplitude modulation (PAM) in 15. replicates for each parameter. Statistical analysis of the obtained results showed significant differences between values of CF parameters in both .
