Abstract
Polyamines are nitrogen compounds present in plants that accumulate, mainly, in response to stress conditions. Polyamines currently due to their biochemical characteristics are involved in a number of important cellular processes such as cell division, packaging of nucleic acids, DNA replication, and others. The present review compiles and analyzes current scientific information regarding biosynthesis and accumulation in cellular compartments and degradation in the cytosol of the majority polyamines (putrescine, spermidine and spermine). Transport is also explained and its role in cellular homeostasis is described and their associations with other molecules that confer activity as growth regulators, signaling molecule to modulate mitochondrial functions, influence cell proliferation and stimulation of protein synthesis that can be essential to understand their involvement in the mechanism of plant tolerance to stress.
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