Promotion of Fruit Abscission with Abscisic Acid

Zucconi, F.; Bukovac, Martin J.

doi:10.2307/1294793

Cited by 12 publications

(9 citation statements)

References 14 publications

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“…On the other hand Figure 4 demonstrates that the light intensity strongly affects the endogenous auxin level of the shoots. Several workers have demonstrated that the abscission of leaves, leaf petiols, flowers and flower buds and fruits are controlled by hormones (1,8,14,20,21,22,28,29,30,31,32,33). The results of the present experiments indicate that the endogenous level of auxin plays an important role in the formation of blind shoots in roses.…”

Section: Discussionsupporting

confidence: 64%

The Relationship between Flower Abortion and Endogenous Auxin Content of Rose Shoots

Moe

1971

Physiologia Plantarum

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The amount of endogenous growth substances in stem, flowers and leaves of rose plants grown under different temperature and light conditions has been determined.It appeared to be two main growth promoting factors in the acidic fraction of the ether extract. One of them is assumed to be an auxin, probably indol-3yl-acetic acid (IAA); the other is not identified. The level of auxin was much higher in extracts from shoots grown at high temperature than in shoots grown at low temperature. Increasing light intensity also seemed to increase the auxin content of the shoots. Shoots which developed after a high cut back of the rose stem had a higher auxin content than shoots which developed after a low cut back.These findings are discussed in relation to the effect of temperature, light intensity and cut back practise on blind shoot formation in roses. The result of these investigations strongly indicate that abortion in roses is promoted by a low auxin level in the shoots.

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Section: Discussionsupporting

confidence: 64%

The Relationship between Flower Abortion and Endogenous Auxin Content of Rose Shoots

Moe

1971

Physiologia Plantarum

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“…However, there is increasing evidence for the assumption that the abscission of plant parts is controlled by hormones (2, 5,6,16,20,26,27,28,29,31). The application of exogenous auxins inhibits or delays the abscission of leaf petioles, flowers and fruits (4,16,19,27,28,29).…”

Section: Discussionmentioning

confidence: 99%

Factors Affecting Flower Abortion and Malformation in Roses

Moe

1971

Physiologia Plantarum

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The formation of blind shoots and malformed flowers in rose plants grown under various temperatures and light intensities, and subjected to different cut back procedures has been studied. Low temperature, low light intensity and low cut back promoted blind shoot formation. Hybrid tea cultivars are more sensitive for unfavourable temperature, light and cut back treatments than Floribunda cultivars. The process of floral abortion is initiated during the early stages of shoot growth before the differentiation of floral parts has been completed. Low temperatures (12–15°C) in this critical stage of development strongly promote blind shoot formation, but have no effect when stamen and pistil primordia had been formed in the apical flower bud. The formation of malformed flowers, so‐called “bullheads”, which have significantly more petals than normal flowers, is also promoted by low temperature and low cut back. Light intensity seems to have no effect. Shoots subjected to low temperature (12°C) during the early stages of development, before the differentiation of the floral organs are fully completed, produce malformed flowers to a greater extent than shoots subjected to high temperature (18–24°C) during this period. It is suggested that blind shoot formation in roses is subject to hormonal control.

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“…Its abscission-promoting effects in explant systems were instrumental and important in the discovery and characterization of ABA (Addicott, 1983). Subsequent studies have revealed that exogenous application of ABA causes abscission of flowers and young developing fruit of a number of plants, including apple (Edgerton, 1971), cherry (Zucconi et al, 1969), olive (Hartmann et al, 1968), and lupine (Porter and Van Steveninck, 1966). This investigation was undertaken to evaluate the efficacy of ABA as a fruit thinner when used alone and in combination with benzyladenine.…”

mentioning

confidence: 99%

Effect of Abscisic Acid and Benzyladenine on Fruit Set and Fruit Quality of Apples

Greene¹,

Schupp²,

Winzeler³

2011

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Experiments were conducted over a 5-year period to determine the effects of abscisic acid (ABA) and benzyladenine (BA) applied alone and in combination on fruit set, fruit quality, and return bloom of ‘McIntosh’ and ‘Fuji’ apples. ABA thinned in 3 of the 5 years used and it thinned ‘McIntosh’ when applied at bloom, petal fall, and at the 10-mm fruit size stage. On ‘Fuji’, ABA thinned over a range of concentrations from 150 to 1000 mg·L−1. It caused leaf yellowing on ‘McIntosh’ but not on ‘Fuji’. When BA was applied with ABA on ‘McIntosh’, even at a rate as high as 1000 mg·L−1, it either dramatically reduced or prevented leaf yellowing and leaf abscission. The usefulness of applying BA with ABA was inconclusive because of variability in thinning response. ABA advanced surface red color on ‘McIntosh’ and when combined with BA, it reversed the reduction in red color caused by BA.

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Promotion of Fruit Abscission with Abscisic Acid

Cited by 12 publications

References 14 publications

The Relationship between Flower Abortion and Endogenous Auxin Content of Rose Shoots

The Relationship between Flower Abortion and Endogenous Auxin Content of Rose Shoots

Factors Affecting Flower Abortion and Malformation in Roses

Effect of Abscisic Acid and Benzyladenine on Fruit Set and Fruit Quality of Apples

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