When dark-adapted photosynthesising cells are illuminated with continuous light, chlorophyll fluorescence displays characteristic changes in intensity accompanying the induction of photosynthetic activity.
wˌɛn dˈɑːɹkɐdˈæptᵻd fˌoʊɾoʊsˈɪnθəsˌaɪzɪŋ sˈɛlz ɑːɹ ɪlˈuːmᵻnˌeɪɾᵻd wɪð kəntˈɪnjuːəs lˈaɪt, klˌoːɹoʊfˈɪl flʊɹɹˈɛsəns dɪsplˈeɪz kˌæɹɪktɚɹˈɪstɪk tʃˈeɪndʒᵻz ɪn ɪntˈɛnsᵻɾi ɐkˈʌmpəniɪŋ ðɪ ɪndˈʌkʃən ʌv fˌoʊɾoʊsɪnθˈɛɾɪk æktˈɪvᵻɾi.