Gibberellins are a group of phytohormones in which > 50 representatives are known so far. The known natural representatives are designated GA1, GA2, GA3 etc. Gibberellins are mainly formed in growing tissues of higher plants, e.g. in shoot and root meristems (forming tissue), as well as in seeds, fruits and young leaves (leaf). Together with external factors such as light and temperature, gibberellins influence many physiological and morphogenetic processes. Other effects of gibberellins are the promotion of longitudinal growth of shoot axes by stimulating cell growth and cell division, stimulation of flower formation, increase of fruit growth (fruit formation) and triggering of parthenocarpia in tomatoes, apples and cucumis.
Pru p 7 was primarily described as "peamaclein", later as "gibellerin-related protein". This protein is a potent, digestion- and heat-resistant allergen (in various allergens). This protein is a potent, digestion- and heat-resistant allergen (found in various collectives of peach-sensitized patients in about 30% -50% of patients). Its function has not yet been clearly established. Clinically, Pru p 7-sensitised patients have been found to have mainly facial oedema such as swelling of the eyelids; allergic urticaria is triggered less frequently.