Peach Fruit Abscission as Influenced by Applied Gibberellin and Seed Development1

Stembridge, G. E.; Gambrell, C. E.

doi:10.21273/jashs.97.6.708

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…The pronounced abscission of parthenocarpic fruit during June drop may be the result of increased competition (17) among the large population set (Table 1) and depletion of the applied growth substances (mainly auxins) that initially shifted the hormonal TIME AFTER FULL BLOOM (days) Fig. 2.…”

Section: Discussionmentioning

confidence: 99%

Studies on Abscission of Phthalimide-induced Parthenocarpic Sour Cherry Fruits

Retamales

Bukovac

1986

J. Amer. Soc. Hort. Sci.

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AC 94377 (alone and in combination with an auxin), GA3, and BA were evaluated for induction of parthenocarpy and subsequent retention of sour cherry (Prunus cerasus L. ‘Montmorency’) fruit. The persistence of AC 94377-treated fruit was enhanced by addition of CFPA or NAA, persistence and growth being greatest with AC 94377 (3.0 × 10−3 m) + CFPA (7.5 × 10−5 m). CFPA alone (7.5 × 10−5 m) often prevented abscission of flowers, but failed to induce significant fruit growth. Parthenocarpic fruit weighed 30-40% less than seeded fruit. Abscission of parthenocarpic fruit occurred primarily during June drop, and was reduced by an additional application of AC 94377 + CFPA with or without GA3 3 weeks after bloom. AC 94377 and NAA sprayed 2 and 3 weeks after full bloom did not affect the magnitude of June drop of open-pollinated fruit. The rate of fruit abscission was related to time after application, presence or absence of seeds, and relative position between seeded and parthenocarpic fruit. When AC 94377, GA3, and CFPA were applied in lanolin paste to defruited pedicels, only mixtures including CFPA reduced the abscission rate significantly. Chemical names used: l-(3-chlorophthalimido)-cyclohexanecarboxamide (AC 94377); 2-chloro,4-fluorophenoxyacetie acid (CFPA); N-(phenylmethyl)-lH-purin-6-amine (BA); gibberellic acid (GA3); 1-naphthaleneacetic acid (NAA).

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Section: Discussionmentioning

confidence: 99%

Studies on Abscission of Phthalimide-induced Parthenocarpic Sour Cherry Fruits

Retamales

Bukovac

1986

J. Amer. Soc. Hort. Sci.

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“…Definitive information regarding the duration of the requirement for viable seeds is lacking. Stembridge (21) has suggested that peach fruit become independent of seed function shortly after establishment of a metabolic gradient. In the apple a similar situation may exist.…”

Section: Discussionmentioning

confidence: 99%

An Ultrastructural Evaluation of the Relationship of Embryo/Endosperm Abortion to Apple Fruit Abscission During the Post-Bloom Period1

Weinbaum

Simons

1974

J. Amer. Soc. Hort. Sci.

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Comparisons of seed tissues from persistent and potential drop apple fruit (‘Golden Delicious’) 3 weeks after full bloom suggested that fruit commitment to abscise (determined by a reduced rate of fruit enlargement between 16 and 21 days after full bloom) preceded ultrastructural evidence of degenerative or functional changes in embryo or endosperm tissue. The results do not support the concept of ‘embryo abortion’ as a causal mechanism in natural fruit abscission during post-bloom.

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