Polymnia sonchifolia

In the banana Musa acuminata (Musaceae), a series of novel phenalenone-type compounds, including irenolone and 2-(4 -hydroxyphenyl)-l,8-naphthalenedicarboxylic anhydride, have been identified (Figure 29) 279,280 In the Compositae, acetophenone derivatives in yacon (Polymnia sonchifolia)114 and the coumarins scopoletin and ayapin in sunflower (Helianthus annuus f81 have been reported (Figure 29). 

From sliced yacon tubers after inoculation with the bacterium Pseudomonas cichorii and incubation at 20° for 3 days, then extraction with acetone. Yacon (Polymnia sonchifolia) (Compositae) is cultivated in South America and has recently been introduced into Japan [3445]. 

Yoshida, T., Hashidoko, Y, Mimako, U. and Mizutani, J. 1993. Decarboxylative conversion of hydrocinnamic acid by Klebsiella oxytoca Erwinia uredovora. Epiphytic bacteria of Polymnia sonchifolia leaf, possibly with formation of microflora on the damaged leaves. Biosci. Biotech. Biochem. 57(2) 215-219. 

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