Influence of Gamma Irradiation on Different Phytochemical Constituents of Dried Rose Hip (<i>Rosa canina</i> L.) Fruits
Manol Ognyanov,
Petko Denev,
Desislava Teneva,
Yordan Georgiev,
Sabina Taneva,
Iskra Totseva,
Mariana Kamenova-Nacheva,
Yana Nikolova,
Svetlana Momchilova
Affiliations
Manol Ognyanov
Laboratory of Biologically Active Substances-Plovdiv, Institute of Organic Chemistry with Centre of Phyto-chemistry, Bulgarian Academy of Sciences, 139 Ruski Blvd., 4000 Plovdiv, Bulgaria
Petko Denev
Laboratory of Biologically Active Substances-Plovdiv, Institute of Organic Chemistry with Centre of Phyto-chemistry, Bulgarian Academy of Sciences, 139 Ruski Blvd., 4000 Plovdiv, Bulgaria
Desislava Teneva
Laboratory of Biologically Active Substances-Plovdiv, Institute of Organic Chemistry with Centre of Phyto-chemistry, Bulgarian Academy of Sciences, 139 Ruski Blvd., 4000 Plovdiv, Bulgaria
Yordan Georgiev
Laboratory of Biologically Active Substances-Plovdiv, Institute of Organic Chemistry with Centre of Phyto-chemistry, Bulgarian Academy of Sciences, 139 Ruski Blvd., 4000 Plovdiv, Bulgaria
Sabina Taneva
Laboratory of Lipid Chemistry, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 9 Acad. Georgi Bonchev Str., 1113 Sofia, Bulgaria
Iskra Totseva
Laboratory of Lipid Chemistry, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 9 Acad. Georgi Bonchev Str., 1113 Sofia, Bulgaria
Mariana Kamenova-Nacheva
Laboratory of Organic Synthesis and Stereochemistry, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 9 Acad. Georgi Bonchev Str., 1113 Sofia, Bulgaria
Yana Nikolova
Laboratory of Organic Synthesis and Stereochemistry, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 9 Acad. Georgi Bonchev Str., 1113 Sofia, Bulgaria
Svetlana Momchilova
Laboratory of Lipid Chemistry, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 9 Acad. Georgi Bonchev Str., 1113 Sofia, Bulgaria
Gamma irradiation is efficiently applied to many foods, but nevertheless there is a distinct lack of information about the changes of macro- and micronutrients (e.g., carbohydrates, lipids, organic acids, and phenolics) in dried rose hip (RH) fruits. Therefore, in this study, for the first time, the effect of gamma irradiation (10 and 25 kGy) on RH constituents is investigated. Different analytical techniques (GC-FID, HPLC-UV, HPSEC-RID, IR-FT, and SEM) are employed to examine this effect. The irradiation treatment (10 kGy) increased the glucose content by 30% and released cellobiose from RH fruits, thus revealing cellulose destruction. The extractability of total uronic acids increased from 51% (control) to 70.5% (25 kGy-irradiated), resulting in a higher pectin yield (10.8% β-carotene, and (un)saturated fatty acids, but it affected the tocopherols levels. Gamma rays had a negligible effect on the phenolic constituents and did not affect ORAC and HORAC antioxidant activity. In conclusion, it can be compromised that the exposition of dried RH is safe and can be successfully applied to decontaminate fruits without affecting their nutritional value and biological activity.
