Whereas, a significant increase in scopoletin and umbelliferone content, as compared to the controls, was observed after 24 h in salt-treated tissues
A similar accumulation pattern of the three phytoalexins in C. oleophila-challenged grapefruit peel tissue has also been reported
suggested that umbelliferone might be a precursor
of scopoletin, which, in turn, is thought to be a precursor of scoparone
This might explain the lowest level of
umbelliferone and scopoletin detected in our salt-treated tissues
as compared to scoparone content