Role of Polyamines in Stress Response in Horticultural Crops
Polyamines (PAs) are low molecular weight aliphatic cations that are ubiquitous in all organisms, including plants. PA accumulation occurs under stress in plants, and modulation of the PA biosynthetic pathway confers tolerance to stresses. Over the past two decades, many reports have unraveled significant functions of PAs in the regulation of abiotic stress tolerance in plants. Here, we focused on the involvement of PA pathways in plants, including those of horticultural crops, in ameliorating abiotic stresses such as salt, drought, heat, chilling, and heavy metals. The possible mechanisms of PA functions on stress tolerance have also been summarized. In addition, the current research trends and future perspectives, especially in horticultural crops, are discussed.
KeywordsAbiotic stress Genetic transformation Horticultural crop Polyamine Tolerance
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