Effects of Gibberellins and Naphthaleneacetic Acid on Fruit Development in Seedless Apple Clones1
Year: 1970
Type: article
Abstract: Gibberellic acid (GA 3 ) has little effect on fruit set in seeded commercial varieties of apple unless pollination is prevented. To determine whether seedless apples might respond to GA, blossoms of several apetalous clones were treated with gibberellins. In addition, seeded and seedless fruits were sprayed several weeks after bloom with naphthaleneacetic acid (NAA), a fruit-thinning agent, to ascertain the role of seeds in auxin-induced fruit abscission. GA 3 was effective in increasing fruit set in 2 of the 6 clones tested, but had no effect on the remaining 4, only one of which crops heavily under orchard conditions. GA 7 and GA 4+7 were more active than GA 3 in inducing fruit set in the 2 responsive clones. NAA thinned both seeded and seedless fruits of one clone. Fruit growth was inhibited in seedless fruits of 2 other clones, but abscission was not promoted. These results support the view that NAA-induced fruit abscission is not a result of seed abortion.
Author: F. G. Dennis
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: hybrid
Estimated APC paid: $3,500
OpenAlex ID: W1827221837