Abstract

 

It was found 9 non protein amino acids: α-aminoadipic acid, β-alanine, α-aminobutyric acid, β-aminobutyric acid, γ-aminobutyric acid (GABA), cystathionine, citrulline, ornithine and hydroxyproline in the various tissues of Siberian conifers Pinus sylvestris L., Larix sibirica Ledeb., Larix gmelinii (Rupr.) Rupr.. The largest part of them was in the cambial zone and reached 90% of free amino acids sum. Into this group of compounds GABA dominated, its content in the cambial zone reached 95% of non protein amino acids sum. The part of the others non protein amino acids in most tissues don’t exceed 10%, only in the wood up to 30% of citrulline and 13% of β-alanine were found. A ratio of non protein amino acid differs in various tissues and depends on hydrothermic conditions. It is supposed the function of non protein amino acids as stress metabolites and accumulators of free amino groups.

 

Key words: Pinus sylvestris L., Larix sibirica Ledeb., Larix gmelinii (Rupr.) Rupr.. non protein amino acids, needles, inner bark, cambial zone, xylem, wood

 

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