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Gal Sapir, Raphael A. Stern, Martin Goldway and Sharoni Shafir

Self-incompatibility (SI) is the ability of a fertile hermaphrodite flowering plant to prevent self-fertilization by discriminating between self and nonself pollen. Japanese plum ( Prunus salicina Lindl.), a species of the Rosaceae family

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Qijing Zhang and Dajun Gu

resistant to rain cracking and ripening synchronously ( Zhang et al., 2008 ). Small fruit size (0.4–2.85 g) has been one of the major factors limiting its development. Prunus salicina is one of the important commercial stone fruits both in China and

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Peng Li, Weifeng Wu, Faxing Chen, Xinghui Liu, Yongan Lin and Jianjun Chen

Plum [ Prunus salicina Lindl. (syn. Prunus triflora Roxb. or Prunus thibetica Franch.)], commonly known as chinese plum or japanese plum, is a diploid (2 n = 2 x = 16) fruit tree native to China. It is one of the most important stone fruit

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Peter C. Andersen, Brent V. Brodbeck and Russell F. Mizell 111

The effects and interactions of water stress and nutrient solution on water relations and concentrations of amino acids, organic acids and sugars in xylem fluid of `Methley' plum (Prunus salicina Lindl.) and `Carolina Beauty' crape myrtle (Lagerstroemia indica L.) during midday were determined. Container-grown plants were irrigated with water or nutrient solution (i.e., osmolarity = 138 mm) for 15 days, then irrigation was either continued or terminated for the next 5 days. The experiments were analyzed as factorial designs for each species separately, with the nutrient solution and irrigation status the last 5 days as the main factors. Xylem fluid tension increased ≈ 2- to 3-fold and leaf conductance to water vapor and transpiration were reduced ≈ 10-fold by withholding irrigation for both species; plant water relations of L. indica were also influenced by the nutrient solution. For both species, the osmolarity of xylem fluid was not altered by withholding irrigation. The predominant organic compounds quantified in both species were amides (i.e., glutamine and asparagine), arginine, and citric and malic acids. Sugars represented a small proportion (i.e., generally ≤ 1%) of total osmolarity. Irrigation altered the chemical profile of amino acids and organic acids to a greater degree than the nutrient solution. Water stress induced a 3-fold increase in total organic acids in xylem fluid of both species. The osmolarity and the concentration of most organic compounds in xylem fluid of P. salicina were not significantly affected by the nutrient solution. Arginine increased markedly in concentration by withholding irrigation or with the application of nutrient solution for L. indica. The concentration of most organic compounds did not vary greatly in response to variations in soil water or nutrient status. In conclusion, soil water-or nutrient-mediated changes in plant water relations exceeded changes in xylem fluid chemistry.

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David Karp

In the history of horticulture it is rare to find an individual who almost single-handedly created a new commercial industry based on a novel fruit type as Luther Burbank (1849–1926) did for Asian-type plums ( Prunus salicina ) in the United States

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María Engracia Guerra, Ana Wünsch, Margarita López-Corrales and Javier Rodrigo

Japanese plum is widely cultivated in temperate zones since its introduction in California from Japan in the 19th century ( Faust and Surányi, 1999 ). The term japanese plum originally was applied to Prunus salicina but currently does not

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María Engracia Guerra, Ana Wünsch, Margarita López-Corrales and Javier Rodrigo

Beppu, K. Komatsu, N. Yamane, H. Yaegaki, H. Yamaguchi, M. Tao, R. Kataoka, I. 2005 S -e-haplotype confers self-compatibility in japanese plum ( Prunus salicina Lindl.) J. Hort. Sci. Biotechnol. 80 760 764 Boonprakob, U. Byrne, D.H. Graham, C.J. Okie, W

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C.H. Crisosto, W.A. Retzlaff, L.E. William, T.M. DeJong and J.P. Zoffoli

We investigated the effects of three seasonal atmospheric ozone (0,) concentrations on fruit quality, internal breakdown, weight loss, cuticle structure, and ripening characteristics of plum fruit from 3-year-old `Casselman' trees in the 1991 season. Trees were exposed to 12-hour daily mean O3 concentrations of 0.034 [charcoal-filtered air (CFA)], 0.050 [ambient air (AA)], or 0.094 [ambient plus O3 (AA+O)] μl·liter-1 from bloom to leaf-fall (1 Apr. to31 Oct. 1991). Fruit quality and internal breakdown incidence measured at harvest and after 2, 4, and 6 weeks of storage at 0C were not affected by any of the O3 treatments. Following an ethylene (C2H4) preconditioning treatment, the rate of fruit softening, C2H4 production, and CO, evolution was higher for plums harvested from the AA + O than from those grown in CFA. Weight loss of fruit from the AA + O exceeded that of fruit from CFA and AA. Anatomical studies of mature plums indicated differences in wax deposition and cuticle thickness between fruit grown in AA + O, AA, and CFA. Differences in gas permeability, therefore, may explain the difference in the ripening pattern of `Casselman' plum fruit grown in high atmospheric O3 partial pressures.

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Angela D. Myracle, Zakkary J. Castonguay, Amber Elwell and Renae E. Moran

‘Blackamber’ plum ( Prunus salicina Lindell) consumer acceptance Postharvest Biol. Technol. 34 237 244 Crisosto, C.H. Crisosto, G.M. Neri, F. 2006 Understanding tree fruit quality based on consumer acceptance Acta Hort. 712 183 190 Díaz-Mula, H.M. Zapata, P

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Jung Hyun Kwon, Ji Hae Jun, Eun Young Nam, Kyeong Ho Chung, Ik Koo Yoon, Seok Kyu Yun and Sung Jong Kim

Most Asian plum ( Prunus salicina Lindl.) cultivars have a self-incompatible mechanism that prevents self-fertilization ( Okie and Hancock, 2008 ). In fact, most rosaceous fruit tree species, including P. salicina , exhibit gametophytic self