Tags: polyamines

The humidity level matters during the desiccation of Norway spruce somatic embryos

Submitted by Kateřina Eliášová on Fri, 07/29/2022 - 09:57

In Norway spruce, as in many other conifers, the germination capacity of somatic embryos is strongly influenced by the desiccation phase inserted after maturation. The intensity of drying during desiccation eminently affected the formation of emblings (i.e., seedlings developed from somatic embryos). Compared to non-desiccated embryos, the germination capacity of embryos desiccated at 100% relative humidity was about three times higher, but the reduction of relative humidity to 95% and 90% had a negative effect on the subsequent embryo development.

Polyamine metabolism after induction of autophagy in tobacco BY2 cell culture

Submitted by Kateřina Eliášová on Thu, 10/13/2022 - 11:37

Polyamines putrescine (Put), spermidine (Spd), and spermine (Spm) are ubiquitous, small aliphatic polycations found in eukaryotic organisms, which regulate vital developmental and physiological events. They play an important role in diverse plant growth and developmental processes and adaptation to environmental stresses. Among other functions, spermidine stimulates the process of autophagy across species including yeast, animals, and even humans.

Polyamine metabolism and autophagy in plants

Submitted by Kateřina Eliášová on Thu, 10/13/2022 - 11:16

Polyamines putrescine (Put), spermidine (Spd), and spermine (Spm) are ubiquitous, small aliphatic polycations found in eukaryotic organisms, which regulate vital developmental and physiological events. They play an important role in diverse plant growth and developmental processes and adaptation to environmental stresses. Among other functions, spermidine stimulates the process of autophagy across species including yeast, animals, and even humans.

Metabolism of polyamines

Submitted by Lenka Gemperlová on Tue, 04/10/2018 - 12:53

Polyamines (PAs), low molecular mass polycations, are ubiquitous cell components that are essential for normal growth of both eukaryotic and prokaryotic cells. Most of the biological functions of PAs can be explained by their polycationic nature, which facilitates interactions with anionic macromolecules (such as DNA and RNA) and negatively charged groups of membranes.

Exogenous putrescine affects endogenous polyamine levels and the development of Picea abies somatic embryos

Submitted by Zuzana Vondráková on Tue, 02/13/2018 - 09:44

Vondráková Z, Eliášová K, Vágner M, Martincová O, Cvikrová M:

Exogenous putrescine affects endogenous polyamine levels and the development of Picea abies somatic embryos. 

PLANT GROWTH REGULATION 75: 405-414, 2015.