EFFECT OF PUTRESCINE, L-ARGININE AND COBALT ON FRUIT SET, ETHYLENE CONTENT AND APPARENT PARTHENOCARPY IN OLIVE (OLEA EUROPAEA L.)

Sprays of Putrescine-HC1 or L-Arginine-HC1 to olives either at full-bloom or at the beginning of petal-fall increased fruit set but did not affect fruitlet abscission.
In contrast, sprays of Cobalt Chloride did not increase fruit set but induced apparent parthenocarpy in 67% of fruits, with consequent reductions in fruit size.
All three substances decreased intercellular ethylene in inflorescences.

The uptake rate of ³H-(n)Putrescine into the inflorescences was greater than into the leaves and resulted in a limiting step being 21 times smaller than previously observed in apple.

V International Symposium on Growth Regulators in Fruit Production

E. Rugini, G. Bongi, M. Mencuccini

https://doi.org/10.17660/ActaHortic.1986.179.53