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Secondary abscission and parthenocarpic fruit growth in apple and pear flowers in vitro


, : Secondary abscission and parthenocarpic fruit growth in apple and pear flowers in vitro. Acta Horticulturae (34): 299-309

Apple and pear flowers were grown in vitro to study the influence of growth substances on secondary abscission and parthenocarpic fruit growth under controlled conditions. Abscission in apple could be induced only by auxins and could be antagonized by high concentrations of cytokinins; in pear both auxins and cytokinins were inductive. Auxin-induced abscission in apple always occurred at 2-5 mm from the base of the pedicel.

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Related references

Pierik, R.L.M., 1973: Hormonal induction of secondary abscission in apple and pear pedicels in vitro. In vitro, apple and pear pedicels without a primary abscission layer formed a secondary abscission layer, especially under the influence of hormones. In apple abscission could only be induced by auxins, and the site of the abscission layer, a few...

Henry W.H., 1968: Control of abscission in agricultural crops and its physiological basis apple d pear d citrus d pre harvest fruit drop naphthalene phenoxy growth regulators auxin concentration. Plant Physiology (rockville): 1560-1576

Wertheim, Sj, 1973: Chemical control of flower and fruit abscission in apple and pear. Acta Horticulturae 34 (1): 321-331

Pierik, R.L.M., 1971: Auxin-induced secondary abscission in isolated apple flowers. Cox's Orange Pippin flowers were grown in a basic culture medium in continuous fluorescent light. When NAA, IBA or IAA were added to the medium a secondary abscission layer was formed 2-5 mm from the basal end of the pedicel. This did not occ...

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Pierik, R.L.M., 1980: Hormonal regulation of secondary abscission in pear pedicels in vitro. Cultured Beurre Hardy pear pedicels cut above their primary abscission layer could form secondary abscission layers, especially under the influence of auxins (IAA, IBA, NAA) and cytokinins (kinetin, BA, PBA); auxins were more effective than cytoki...

Sato, S.; Peet, M.M.; Gardner, R.G., 2001: Formation of parthenocarpic fruit, undeveloped flowers and aborted flowers in tomato under moderately elevated temperatures. Incidence of parthenocarpic fruit, undeveloped flowers and flower abortion in tomato plants (Lycopersicon esculentum) were compared under optimum temperature (OT, 28/22 degrees C day/night) and chronic, mild high temperature conditions (HT, 32/26...

Goldwin, G.; Schwabe, W., 1974: Use of a plant growth regulator mixture for parthenocarpic fruit setting in apple. Proceedings 2th (v 1) 131-136