Ceratiola ericoides

Tanrisever, N. et al., Ceratiolin and other flavonoids from Ceratiola ericoides, Phytochemistry, 26, 175, 1987. 

A number of phenylpropanoid-derived compounds are capable of inhibition of seed germination and seedling growth of other plants. Dihydrocinnamic acid (79), from Ceratiola ericoides (Empetraceae), a common plant in the Florida scrub, was shown to inhibit both germination and growth of Schizachyrium scoparium (little blue stem, Poaceae), Leptochloa dubia (Poaceae), Rudbeckia hirta (As-... 

The dihydrochalcone ceratiolin (78), from the foliage of Ceratiola ericoides (Empetraceae), has little phytotoxic activity, but decomposes slowly to yield hydrocinnamic acid and other products which are inhibitory to seed germination and radicle growth of test organisms (Tanrisever et al., 1987). 

For three species, environmental transformation of plant natural products into more toxic substances seems to be significant. Leaf washes of Ceratiola ericoides contain the inactive dihydrochalcone ceratiolin, which in aqueous solution degrades to phytotoxic hydrocinnamic acid on exposure to light (Tanrisever et al. 1987 Fischer et al. 1994). Leaf washes of Chrysoma pauciflosculosa contain the diterpene 17-hydroxygrindelic acid as a major component. This compound is readily oxidized to 17-oxogrindelic acid, which is more toxic (Menelaou et al. 

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