Poliaminy – być albo nie być dla rośliny
Polyamines – to be or not to be for the plant

Summary/Abstract: Putrescine (Put), spermidine (Spd) and spermine (Spm) are basic polyamines (PAs), occurring in every one living organism including plants. Polyamines belong to the group of plant growth regulators and are well recognized due to their protecting role during plant response to biotic and abiotic stresses. PAs play also a crucial role in regulation of many physiological processes e.g. seed germination or plant senescence. Both, excess and deficit of PAs is deleterious for cells. Therefore, control of PAs biosynthesis and degradation determining their homeostasis is of high importance. PAs synthesis is link to pathways of ethylene and nitric oxide (NO) biosynthesis, while PAs catabolism leads to hydrogen peroxide (H2O2) production, thus it is clear that PAs operate in a network with classical phytohormones and signaling molecules. The work summarizes the current knowledge on PAs metabolism and their impact on growth and development of plants.

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