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ISHS Acta Horticulturae 34: Symposium on growth Regulators in Fruit Production

EFFECT OF GROWTH REGULATORS ON THE SIZE AND SHAPE OF FRUITS

Author:   G.E. Stembridge
DOI:   10.17660/ActaHortic.1973.34.59
Abstract:
Growth regulators often affect fruit size indirectly, usually by modifying the crop load and thereby altering the supply of metabolites available to the individual fruit. Fruit size is sometimes influenced as a direct effect of applied chemicals, and yield is altered without an adjustment in crop load. In such cases little is known about the specific role of growth substances in fruit growth. Growth regulators alter fruit shape by causing assymetrical fruit development, or by overall changes in fruit elongation. Chemically-induced fruit elongation and development of prominent points on the calyx end of 'Delicious' apples is desirable, but most changes in fruit shape are either undesirable or have little economic significance.

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