Organic acids, sugars, vitamin C, antioxidant capacity and phenolic compounds in fruits of white (<i>Morus alba</i> L.) and black (<i>Morus nigra</i> L.) mulberry genotypes

  • S. P. Eyduran Igdir University, Agricultural Faculty, Department of Horticulture, Igdir-Turkey
  • S. Ercisli Ataturk University, Agricultural Faculty, Department of Horticulture, Erzurum, Turkey
  • M. Akin Oregon State University, Agricultural Faculty, Department of Horticulture, Corvallis
  • O. Beyhan Sakarya University, Pamukova Vocational School, Sakarya-Turkey
  • M.K. Gecer Igdir University, Agricultural Faculty, Department of Horticulture, Igdir-Turkey
  • E. Eyduran Igdir University, Agricultural Faculty, Department of Animal Science, Biometry Genetics Unit, Igdir-Turkey
  • Y. E. Erturk Igdir University, Agricultural Faculty, Department of Agricultural Economy, Igdir-Turkey
Keywords: mulberry, bioactive content, genotypic effect

Abstract

Mulberries (Morus spp) are historically grown in particular microclimatic regions in Eastern Anatolia, including Aras valley. In the valley, mulberries are one of the ancient crop and used for several purposes by local people. The aim of the present study was to first time evaluate organic acids, sugars, vitamin C, antioxidant capacity (TEAC assay, Trolox Equivalent Antioxidant Capacity). and phenolic compounds of the historical black and white mulberry genotypes growing Aras valley in Turkey. Results showed that, species and genotypes strongly influenced the chemical content and antioxidant capacity (p<0.05). Malic acid was the main organic acid in all genotypes and ranged from 1.130 to 3.040 g/100 g. Among sugars, fructose and glucose are predominant and were between 4.177 and 7.700 g/100g and 5.337 and 8.573 g/100g in all mulberry genotypes, respectively. The black mulberry genotypes showed remarkably higher antioxidant capacity determined by TEAC assay (10.167 to 14.400 µ mol TE/g) compared to white mulberry genotypes (6.170 to 9.273 µmol TE/g). Chlorogenic acid and rutin was the main phenolic compound.

Published
2015-05-12