SHST - Horticulture and Forestry Society from Transylvania, 40 Years of Horticulture Education in Cluj-Napoca

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Influence of Harvest Time on Biologically Active Compounds and the Antioxidant Activity in Leaves of Mulberry Grown in Lithuania
Dovilė LEVICKIENĖ, Elvyra JARIENĖ, Marek GAJEWSKI, Honorata DANILČENKO, Nijolė VAITKEVIČIENĖ, Jarosław L. PRZYBYŁ, Monika SITAREK

Last modified: 2017-04-15

Abstract


Mulberry (Morus alba L.) leaves contain a wide range of bioactive compounds, such as flavonoids and phenolic acids, which are responsible for beneficial effects on human health. This study investigated the influence of the harvest time on the contents of flavonoid compounds (rutin, isoquercetin, nicotiflorin, and astragalin) and chlorogenic acid, as well as the antioxidant activity in mulberry leaves. Leaves from two mulberry cultivars were collected from July to September in 2015-2016 and analyzed. The results showed that the total flavonoid contents of mulberry leaves in the two cultivars ranged from 921.92 to 1512.02 mg 100 g1 (dry matter). The highest accumulated rutin, nicotiflorin, and chlorogenic acid contents and the greatest antioxidant activity were found in the leaves of ‘Plodovaja 3’. The bioactive compounds in the leaves of the mulberry cultivars varied over a period of time, where ‘Turchanka’ and ‘Plodovaja 3’ accumulated the highest total flavonoid contents in September and August, respectively. In both cultivars, the antioxidant activity was highest in September. There were a very strong positive correlations between the antioxidant activity as determined using the DPPH method and the chlorogenic acid contents (r = 0.887, p < 0.05) and the isoquercetin contents (r = 0.848, p < 0.05).

 

 

This abstract was accepted to be presented at the conference entitled “40 Years of Horticulture Education in Cluj-Napoca” Cluj-Napoca, September 27, 2017, being included in ‘Book of Abstracts’ of this special-anniversary event (http://conference.shst.ro). All accepted papers will be published in a special issue of Notulae Botanicae Horti Agrobotanici Cluj-Napoca journal.