Melatonin and Carbohydrate Metabolism in Plant Cells

Melatonin, a multifunctional molecule that is present in all living organisms studied, is synthesized in plant cells in several intercellular organelles including in the chloroplasts and in mitochondria. In plants, melatonin has a relevant role as a modulatory agent which improves their tolerance response to biotic and abiotic stress. The role of melatonin in stress conditions on the primary metabolism of plant carbohydrates is reviewed in the present work. Thus, the modulatory actions of melatonin on the various biosynthetic and degradation pathways involving simple carbohydrates (mono- and disaccharides), polymers (starch), and derivatives (polyalcohols) in plants are evaluated. The possible applications of the use of melatonin in crop improvement and postharvest products are examined.

Automated summary

Melatonin, a multifunctional molecule present in all living organisms, is synthesized in plant cells in various organelles and plays a role as a modulatory agent improving plant tolerance to stress. This study reviews the effects of melatonin on plant carbohydrate metabolism under stress conditions, evaluating its modulation on various biosynthetic and degradation pathways. Furthermore, potential applications of melatonin in crop improvement and postharvest products are examined.