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Serotonin (5-hydroxytryptamine) is an ancient indoleamine compound and potent antioxidant, playing diverse roles in organisms across all kingdoms of life. In plants, phytoserotonin has been found to serve many functions including modulation of plant growth and development, photosynthesis, reproduction, and responses to biotic and abiotic stress. Though it is still an underrepresented area of research as compared to its vertebrate and human counterparts, the field of phytoserotonin research is quickly growing in size. This can be partially attributed not only to the importance of serotonin in other kingdoms but also to the increasingly diverse and important roles serotonin appears to play in plants with broader applications to areas including plant conservation, agriculture, signaling, and behavior. This review aims to provide an overview of the origin of serotonin in plants, making reference to the important function it serves in the life of plants to highlight broader implications for the field of phytoserotonin research. |
