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Gerson R. de L. Fortes and Silvio L. Teixeira

The aim of this work was to study different apple of somatic material as callus and adventitious shoots are concerned, for further utilization in the research of somaclonal variation. The somatic materials were: leaf discs, cotyledons and hypocotyls of Gala apple seedlings, cultivated in a MS medium added by B5 vitamins in addition to (in mg/l): BAP (1,0), NAA (0,5) mio-inositol (100,0) sucrose (30,0 g/l) and solidified in agar (6,0 g/l). The several times of explant exposition to the dark affected the final callus weight. Callus weight derived from leaf discs were higher than those for cotyledons and hypocotyls. Explants exposed directly under light or up to two weeks in the dark showed less percentage of regenerative callus as compared to those of three weeks in the dark. The leaf explants presented the highest percentage of regenerative callus. The least response was obtained for those derived from hypocotyls. The highest number of adventitious shoots was obtained keeping the explants three weeks in the dark as compared to directed light exposition.

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F.F. Ahmed, A.M. Akl, A.A. Gobara and A.E.M. Monsour

The beneficial effect on yield and quality of `Anna' apple fruits for the application of ascobine at 0.1% and citrine at 0.6% was studied during 1995 and 1996. Results showed that two citrine sprays at start of growth and 30 days later of ascobine at 0.1% or citrine at 0.6% were of material promotion effect on yield, fruit weight, total soluble solids, and total sugars, while reducing the total acidity. Both fertilizers were equally very effective in all the studied characters. The most striking and promising treatment was the application of ascobine at 0.1% or citrine at 0.6% twice during the growing season; i.e., growth start at 30 days later.

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Eric Curry

The presence of russet on ‘Golden Delicious' ( Malus × domestica Borkh.) apples has long been a concern to producers and marketers of fresh fruit throughout the world because it detracts from the smooth, uniform finish of the fruit and results in

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Rongcai Yuan and Jianguo Li

‘Delicious’ is one of the most important apple ( Malus × domestica Borkh.) cultivars grown in the United States. Excessive preharvest apple fruit drop, which occurs before fruit develop optimum red color, maturity, or size, is one of its faults

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Moritz Knoche, Bishnu P. Khanal and Matej Stopar

Ultrastructure of epicuticular wax aggregates during fruit development in apple ( Malus domestica Borkh.) J. Hort. Sci. Biotechnol. 80 668 676 Curry, E.A. 2008 Effects of 1-MCP applied postharvest on epicuticular wax of apples ( Malus domestica Borkh.) during

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Alan R. Biggs and Gregory M. Peck

, processing, and dessert apples ( Malus × domestica Borkh.) grown in Virginia J. Agr. Food Chem. 62 10181 10191 Watkins, C. Schupp, J. Rosenberger, D. 2004 Calcium nutrition and control of calcium-related disorders. New York Fruit Qrtly. 12(2):15–21 van Goor

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Rongcai Yuan and David H. Carbaugh

Preharvest apple ( Malus × domestica Borkh.) fruit drop, which occurs before fruit develop optimum red color, maturity, or size, usually causes a serious economic loss. Conversely, picking fruit before adequate maturity may lead to poor

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Hatsuhiko Okada, Yoshitaka Ohashi, Mamoru Sato, Hideyuki Matsuno, Toshiya Yamamoto, Hoytaek Kim, Tatsuro Tukuni and Sadao Komori

Guilford, P. Prakash, S. Zhu, J.M. Rikkerink, E. Gardiner, S. Bassett, H. Forster, R. 1997 Microsatellites in Malus × domestica (apple): Abundance, polymorphism and cultivar identification Theor

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Keith Yoder, Rongcai Yuan, Leon Combs, Ross Byers, Jim McFerson and Tory Schmidt

Chemical thinning is one of the most effective measures to improve apple ( Malus domestica Borkh.) fruit size, color and quality at harvest, increase return bloom the next year, reduce biennial bearing, and increase the profitability of

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Li Ma, Chang Wei Hou, Xin Zhong Zhang, Hong Li Li, De Guo Han, Yi Wang and Zhen Hai Han

apple ( Malus × domestica Borkh.) trees in vitro: Multiple cytokinin tolerance expressed among three strains of ‘McIntosh’ that differ in their growth habit under field conditions Plant Cell Tissue Organ Cult. 54 71 76 Shao, K.J. Li, D.K. Zhang, Z