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Phenotypic and Bioactive Diversity on Medlar Fruits (Mespilus germanica L.)

Phänotypische und bioaktive Diversität bei Mispel-Früchten (Mespilus germanica L.)

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Abstract

Mespilus germanica, known as the medlar, is a large shrub or small tree. The fruit has been cultivated since Roman times, and is unusual in being available in winter, and in being eaten when bletted.  In this study twelve medlar (Mespilus germanica L.) genotypes were harvested at commercial maturity stage (skin brownish, pulp white, fruit hard) from Rize provinces located eastern black sea region and were analyzed for their some important fruit phenotypic (fruit mass, shape index, fruit firmness, ostiole diameter and fruit flesh ratio) and bioactive characteristics (total phenolic content, total antioxidant capacity, vitamin C and phenolic compounds). A wide variation among genotypes on most of the searched parameters was found. Fruit mass and flesh ratio varied from 12.3 g (KRD-1) to 23.6 g (KRD-8) and 83.6 % (KRD-2) to 93.0 % (KRD-4) indicating high variability among genotypes. The total phenolic contents of twelve medlar genotypes varied from 157 to 227 mg gallic acid equivalent in 100 g fresh weight basis. Chlorogenic acid, rutin and p-coumaric acid were dominant in medlar fruits.

Zusammenfassung

Mespilus germanica, bekannt als Mispel, ist ein großer Strauch oder kleiner Baum. Die Frucht wird seit römischen Zeiten kultiviert, ist im Winter normalerweise nicht erhältlich und kann nur im überreifen Zustand verzehrt werden. In dieser Untersuchung wurden zwölf Mispelgenotypen, die aus den Reisanbaugebieten der östlichen Schwarzmeerregion stammen, im handelsüblichen Reifestadium (braune Haut, weißes Fruchtfleisch, harte Frucht) geerntet und nach phänotypischen Gesichtspunkten (Fruchtgewicht, Fruchtformindex, Fruchtfleischfestigkeit, Durchmesser der Ostiolen und Fruchtfleischanteil) bewertet und auf Inhaltsstoffe (Gesamtphenolgehalt, antioxidative Kapazität, Vitamin C und phenolische Bestandteile) analysiert. Bei den Genotypen wurden bei den meisten untersuchten Parametern große Unterschiede gefunden. Das Fruchtgewicht variierte von 12,3 g (KRD-1) bis zu 23,6 g (KRD-8) und der Fruchtfleischanteil von 83.6 % (KRD-2) bis 93.0 % (KRD-4), was auf die große Variabilität zwischen den Genotypen hinweist. Der Gesamtphenolgehalt der zwölf Mispelgenotypen variierte von 157 bis 227 mg Gallussäure bezogen auf 100 g Frischsubstanz. Chlorogensäure, Rutin und p‑Cumarsäure waren die dominierenden Säuren in den Mispel-Früchten.

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Akbulut, M., Ercisli, S., Jurikova, T. et al. Phenotypic and Bioactive Diversity on Medlar Fruits (Mespilus germanica L.). Erwerbs-Obstbau 58, 185–191 (2016). https://doi.org/10.1007/s10341-016-0272-z

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  • DOI: https://doi.org/10.1007/s10341-016-0272-z

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