Gibberellin-like Substances in Immature Seeds of Guava (Psidium guajavaL.)

From immature seeds of guava fruits, Psidium guajava, L. eight gibberellin-like substances designated X1, X2, X3, X4, X5, X6, X7, and X8 were isolated. Chemical and biological evidence led to the tentative identification of X1, X2, X3, X4, X5, X6, and X7 as gibberellins A6, A5, A1, A3, A7, A9, and A4 respectively. Support for such identification was obtained from paper chromatography, thin-layer chromatography, gradient elution column chromatography, and the lettuce hypocotyl test. The compound X8 has not been identified chemically.