This study was carried out to get the information of Plum tree (192 germplasm) collected in Korea, and to evaluate the organic acid contents and fermentation solution. The organic acid content of fruit was 50.9 ± 6.0 ㎎/g, and which was composed of 55.5% of citric acid, 43.4% of malic acid and 1.1% of oxalic acid, and showed large difference among germplasms. Oxalic acid and malic acid made no differences in organic acid content according to flesh color, whereas citric acid and total organic acid contents were highest in orange color and lowest in whitish green. Malic acid, citric acid and total organic acid contents did not show differences among fruit weight groups, but oxalic acid content was highest at fruit weight of 5.1 ~ 10.0 g and lowest at more than 20.1 g. The sugar content of fermentation solution of fruit was 55.7 ± 1.6 °Brix and the harvest rate was 116.7 ± 8.7%. The correlation coefficients among fruit weight, the sugar content (°Brix) and harvest rate of fermentation solution were very low, and there were correlations of r=–0.551** between fruit weight and oxalic acid, r=– 0.767** between malic acid and citric acid, and r=0.834** between citric acid and total organic acid content.

Abstract
Introduction
Materials and Methods
    Experimental materials
    Organic acid analysis
    Fermentation solution analysis
    Statistical analysis
Results and Discussion
    Organic acids content
    Sugar content and harvest rate of fermentation solution
    Correlation
References

• Hee-Kyoung Kang(Department of Horticulture, Kongju National University)
• Hye-Rin Kang(Department of Horticulture, Kongju National University)
• Young-Sang Lee(Department of Medical Biotechnology, Soonchunhyang University)
• Hong-Seon Song(Department of Plant Resource, Kongju National University) Corresponding author