ISHS Acta Horticulturae 179: V International Symposium on Growth Regulators in Fruit Production
EFFECT OF PUTRESCINE, L-ARGININE AND COBALT ON FRUIT SET, ETHYLENE CONTENT AND APPARENT PARTHENOCARPY IN OLIVE (OLEA EUROPAEA L.) |
| Authors: | E. Rugini, G. Bongi, M. Mencuccini |
| Abstract:
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. | |
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