CHANGES IN RIPENING PHYSIOLOGY OF ´DELICIOUS´ AND ´FUJI´ APPLES TREATED PREHARVEST WITH NAA

1-Naphthaleneacetic acid (NAA) is used in apple crop management to promote fruitlet abscission when applied during the first few weeks after anthesis.
In contrast, when applied to maturing fruit several weeks before harvest, NAA delays abscission.
Because the physiological responses are opposed, it is reasonable to investigate whether the mechanisms of action of NAA applied in the spring vs. the fall, are also different.
A number of experiments were conducted over several years, the results of which indicate, on late-season apple cultivars, NAA applied preharvest suppresses ethylene production and delays loss of firmness after harvest.

X International Symposium on Plant Bioregulators in Fruit Production

E.A. Curry

Malus x domestica, 1-naphthyleneacetic acid, ethylene, maturity, fruit quality

https://doi.org/10.17660/ActaHortic.2006.727.59