Plants, being sessile organisms, are challenged by variety of stresses in the form of abiotic
and biotic components of environment. In such adverse conditions, plants evolve various adaptive
strategies in order to survive. Among these strategies, accumulation of polyamines in plants helps to
combat stress. Polyamines are ubiquitous low molecular weight compounds, which are now known to
be involved in stress tolerance as suggested by various pieces of evidence during abiotic and biotic
stress. The anti-stress properties of polyamines in plants are illustrated by their roles in modulation of
morphological growth parameters, elevation of photosynthetic pigments, as well as declined content of
stress indices, antioxidative enzymes, and non-enzymatic antioxidants content. The emerging role of
polyamines in plant stress tolerance has been discussed in the present review.
Keywords: Polyamines, plant growth regulators, physiological role, biotic stress, abiotic stress, environment.
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