TISSUE-SPECIFIC EXPRESSION OF ESTERASE ISOENZYMES IN LINUM-USITATISSIMUM L

Esterase isoenzyme spectra of different organs of seedlings and field- grown plants of fiber flax (Linum usitatissimum E., cv. Belinka) were studied by electrophoresis in polyacrylamide gel for estimating ontoge netic variability of gene expression. Formation of individual isoester ases depended on the type of tissue and the stage of its development. Isoesterases characteristic of exclusively one or some tissues of the same developmental stage were revealed simultaneously with basic ester ase isoforms active in all analysed parts of seeds, seedlings and fiel d-grown plants, The revealed changes of esterase isoenzyme spectrum du ring germination show tissue and time specificity of the endogenous re gulation of genes controlling their formation.