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Background  The Hawthorn ( Crateagus  sp.) mostly occurs around the temperate region of the world with a high number of species, producing a fruit with numerous beneficial effects for human health. The aim of the study was to determine organic acid and sugar contents in the fruit of a number of hawthorn species grown in Erzincan province of Turkey.    Results  Citric acid was the predominant organic acid in all hawthorn species and  C. pseudoheterophylla  had the highest citric acid content (23.688 g/100 g). There were not statistically significant differences among hawthorn species (except  C. atrosanguinea  Pojark) in terms of fumaric acid content.  C.pontica  C.Koch had a higher content of vitamin C (9.418 mg/100 g) compared to other species. Fructose was the predominant sugar component in all species and  C. monogyna subsp. monogyna  Joiq had the highest fructose content (18.378 g/100 g).    Conclusions  The high fruit quality of the studied species indicates the importance of this fruit in human nutrition as a natural source. The study revealed that there were differences in terms of fruit characteristics among hawthorn species and thus better quality hawthorn genotypes can be selected within the species. Hence, this study is considered to be a valuable reference for forthcoming studies. The high fruit quality of the studied species indicates the importance of this fruit in human nutrition as a natural source.

Organic acids, sugars, vitamin C content and some pomological characteristics of eleven hawthorn species (Crataegus spp.) from Turkey