The development of photosynthetic light reactions in cultured apple embryos in relation to their embryonal dormancy

The development of photosynthetic light reactions (photoreduction and photophosphorylation) was studied in cotyledons of cultured embryos isolated from stratified and non-stratified apple seeds (Malus domestica Borb. cv. Antonówka). The results obtained show the presence of an energy transfer inhibitor in the cotyledons of the stratified embryos.Abbreviations PSII photosystem II - HEPES N-2-hydroxyethylpiperazine-N-2-ethanesulfonic acid - ATP adenosine triphosphate - ADP adenosine diphosphate - CCCP carbonyl cyanide m-chlorophenyl-hydrazone - EDTA ethylenediamine tetraacetic acid; P, inorganic orthophosphate - TES (N-tris [hydroxymethyl] methyl-2-aminoethane sulfonic acid)This work was partly supported by the Polish Academy of Sciences, Contract No 10.2.10