Changes in endogenous gibberellins during fruit growth in guava,with a general discussion

Levels of endogenous gibberellins were determined in seeded and seedless fruits of guava (Psidium guajava L.) in relation to fruit development. The gibberellin content in the seeded fruit was at all times higher than that in the seedless fruit. The peak concentrations of gibberellins in both kinds of fruits occurred at 15 days after pollination and thereafter declined rapidly. This suggests that these substances are involved in the early phase of fruit growth.