Identify seaweed-extract component(s) that trigger phenylpropanoid and flavonoid pathways

Identify and characterize the specific component(s) within seaweed extracts that trigger the phenylpropanoid and flavonoid biosynthetic pathways in plants, and elucidate the mechanisms by which seaweed extracts increase phytochemical content in plants and fruits.

Background

The thesis investigates the effects of several biostimulants—including seaweed extracts—on cucumber growth, yield, and fruit quality. The results show that seaweed extract can enhance non-enzymatic antioxidant traits such as total phenolic and flavonoid contents in fruits.

Despite these observed benefits and corroborating literature showing increased flavonoids after seaweed extract application, the authors note that the exact component(s) within seaweed extracts responsible for activating phenylpropanoid and flavonoid pathways are still not identified. They also highlight the need to clarify the underlying mechanisms driving the phytochemical increases induced by seaweed extracts.

References

the precise component in the SEs that triggers the phenylpropanoid and flavonoid pathways in plants is unknown yet (Fan et al., 2011). Further study is necessary to clarify the mechanisms by which SEs cause significant increases in phytochemical content in plants and fruits (Lola-Luz et al., 2013).

— Effect of seaweed, moringa leaf extract and biofertilizer on growth, yield and fruit quality of cucumber (Cucumis sativus L.) under greenhouse condition  (2403.17984 - Kakbra, 2024) in Chapter Four, Section 4.6.2 (Fruit total flavonoid content)