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David E. Zaurov, Thomas J. Molnar, Sasha W. Eisenman, Timothy M. Ford, Ravza F. Mavlyanova, John M. Capik, C. Reed Funk, and Joseph C. Goffreda

Central Asia is a center of origin for many important fruit and nut tree species, including wild and cultivated apricots ( Prunus armeniaca ) ( Vavilov, 1931 , 1951 ). Apricots, considered by many to be one of the most delicious tree fruits, have

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Timothy L. Creger and Frank J. Peryea

Fruit trees grown in soils contaminated with lead arsenate (PbHAsO4) pesticide residues are subject to arsenic (As) phytotoxicity, a condition that may be exacerbated by use of phosphate fertilizers. A potted soil experiment was conducted to examine the influence of phosphate fertilizer on accumulation of As and lead (Pb) in apricot (Prunus armeniaca) seedlings grown in a lead arsenate-contaminated Burch loam coil. Treatments were fertilizer source (mono-ammonium phosphate [MAP], ammonium hydrogen sulfate [AHS]) and rate (0, 8.7, 17.4, and 26.1 -mmol/liter), and presence/absence of lead, arsenate contamination (231 -mg/kg coil). Plant biomass accumulation was reduced by lead arsenate presence and by high fertilizer rates, the latter due to soil salinization. Phytoaccumulation of As was enhanced by lead arsenate presence and by increasing MAP rate but was not influenced by AHS rate, salinity, or acidity of soil. Phytoaccumulation of Pb was enhanced by lead arsenate presence but was not influenced by fertilizer treatment.

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Muttalip Gündoğdu, Tuncay Kan, and Mustafa Kenan Gecer

and cultivar ( Prunus armeniaca L.) used in all of the experiments were fresh apricots harvested. Fruits were harvested at deep orange 1 (fully ripe) in Malatya, Turkey ( Table 1 ). At each harvest date, we formed random lots, each with 30 fruits

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Issam A. Hassaballa, M.G. Moughieth, N.A. Hagagy, and N.S. Zayed

Shoot tip and single-node cutting explants of `Hamawy' and `El-Amar' apricot cultivars were initiated from forced shoots of field-grown, virus-free trees. Explants were cultured on Murashige & Skoog (MS) Nitsch & Nitsch and Anderson media. Different modifications of MS medium were also evaluated. Antioxidant pretreatment reduced phenolic compounds and decreased necrosis. Modified MS was the best medium for plantlets regeneration, with positive effectiveness of adenine sulfate addition to the modified MS. Shoot multiplication was best on 2.0 mg·L–1 BAP and 1.0 mg·L–1 thidiazuron (TDZ). Also, half-strength MS medium was superior for shoot elongation Surface coverage, 16 hours light/8 hours dark cycle, and 2.0 mg·L–1 IBA induced good rooting. Rooted plantlets were successfully acclimated ex vitro.

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Júlia Halász, Andrzej Pedryc, Sezai Ercisli, Kadir Ugurtan Yilmaz, and Attila Hegedűs

breeding in Turkey and other European countries. Literature Cited Akin, E.B. Karabulut, I. Topcu, A. 2008 Some compositional properties of main Malatya apricot ( Prunus armeniaca L.) varieties Food Chem. 107

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Fatih Ali Canli, Murat Sahin, Nurettin Temurtas, and Mustafa Pektas

rise to the routine use of these treatments in apricot production. Units Literature cited Agusti, M. Juan, M. Almela, V. Speroni, C. 1994 The effect of 2,4-DP on fruit development in apricots ( Prunus armeniaca L.) Sci. Hort. 57 51 57 Andrews, P

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Craig A. Ledbetter

‘Goshen Gold’ is the most recent apricot ( Prunus armeniaca L.) developed by the Agricultural Research Service Prunus breeding program in Parlier, CA. The new cultivar is self-compatible and capable of setting full crops without the presence of

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José Egea, Jose A. Campoy, Federico Dicenta, Lorenzo Burgos, Jose L. Patiño, and David Ruiz

‘Estrella’ and ‘Sublime’ are mid–early ripening apricot cultivars ( Prunus armeniaca L.) with optimal productivity levels, excellent fruit quality, and an attractive color. Although ‘Estrella’ and ‘Sublime’ are both self-incompatible, they are

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Bayram Murat Asma

‘Dilbay’ is an early-maturing table apricot ( Prunus armeniaca L.) cultivar developed from the Multi-Purpose Apricot Breeding Program at the Inonu University, Malatya, Turkey. ‘Dilbay’ is suitable for fresh consumption because it has perfect fruit

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Jose Martínez-Calvo, Gerardo Llácer, and Marisa Luisa Badenes

‘Rafel’ and ‘Belgida’ are mid- to early-ripening apricot cultivars ( Prunus armeniaca L.) with good yield, excellent fruit quality, self-compatibility, and resistance to Sharka, a disease caused by the Plum pox virus , a serious limiting factor