abstract
- Phenolic compounds are a widespread group of phytochemicals derived from the secondary metabolism of herbs and plants. Phytochemicals are mainly produced as a plant response to biotic and abiotic stresses to overcome/adapt these adverse conditions. The study of abiotic stress response of plants has led to numerous discoveries regarding flavonoids and phenolic acids biosynthetic pathways. Since phenolic compounds such as flavonoids and phenolic acids have been related to numerous bioactive health effects, it is of interest to enhance the content of these compounds in plants and herbs. One of the most studied abiotic stresses on herbs is manipulation of light, whether through use of different light colors, light intensity, and/or sunlight. One of the most active groups of compounds elicited in response of light stress is flavones, flavonols, and some phenolic acids. These groups of compounds have been related to health benefits to humans such as antioxidant, cardiovascular disease, and against metabolic syndrome. This chapter aims to comprehensive review recent works on this field.