Work

Abscission Mechanism Studies With Apple Fruitlets1

Year: 1978

Type: article

Abstract: Naphthaleneacetic acid (NAA) applied as a spray to apple ( Malus domestica Borkh.) trees, entire limbs, or foliage only, reduced fruit retention but, when applied to fruit only, retention was unaffected. Silver nitrate sprays did not alter the effect of NAA on fruit retention. A galactose spray did not affect fruit retention. Excised fruits from NAA-sprayed trees took up less 14 C-sucrose and lost less 14 C-indoleacetic acid than those from unsprayed trees. 14 C-sorbitol translocation from lateral leaves to growing shoot tips was reduced more by naphthaleneacetamide (NAM), NAA, and ethephon than was 14 C-sucrose. 14 C-sucrose and 14 C-sorbitol translocation was affected by NAM but not by NAA or ethephon. Additional shade of 25% during 2 consecutive cloudy days reduced retention of ‘Delicious’ fruitlets, indicating that a small reduction of metabolites available to young fruit may adversely affect their retention.

Source: Journal of the American Society for Horticultural Science

DOI: 10.21273/jashs.103.4.455

Author: G. W. Schneider

Institution: University of Kentucky

Language: English

Topic: Plant Physiology and Cultivation Studies

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: hybrid

Estimated APC paid: $3,500