Influences of gibberellins A4, A4+7 and A4+iso-A7 on apple fruit quality and tree productivity. II. Other effects on fruit quality and importance of fruit position within the tree canopy |
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| Authors: | N. E. Looney R. L. Granger C. L. Chu L. N. Mander R. P. Pharis |
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| Affiliation: | 1. Agriculture Canada Research Branch, Summerland, B.C., Canada VOH 1Z0 and St.-Jean-sur- Richelieu, Québec, Canada J3B 3E6;2. Horticultural Research Institute of Ontario, Vineland Station, Ontario, Canada LOR 2E0;3. Research School of Chemistry, Australian National University, P.O. Box 4, Canberra, A.C.T. 2601, Australia;4. Plant Physiology Research Group, Biological Sciences Department, University of Calgary, Calgary, Alberta, Canada T2N 1N4 |
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| Abstract: | Post-bloom gibberellin sprays increased fruit length:diameter (L/D) ratio and juice soluble solids but did not influence flesh firmness of ‘Golden Delicious’ apples grown in a maritime (Québec) or desert (Okanagan Valley, B.C.) climate. Irrespective of GA treatment, ‘exterior’ fruit at both Canadian locations was larger, yellower, exhibited less russet, and contained more soluble solids at harvest than ‘interior’ fruit. Fruit shape (L/D ratio) was not influenced by position of the fruit within the canopy. Correlation analyses showed that surface russet development is poorly related to seed set, fruit size and other measures of fruit quality. However, a correlation matrix examining the degree of interrelatedness of all fruit size, fruit development and fruit quality indices revealed other relationships that may provide clues to understanding the relationship between fruit growth and quality development of ‘Golden Delicious’ apple. |
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