Plant, Soil and Environment

D. Kviklys ¹, M. Liaudanskas ², V. Janulis ³, P. Viskelis ⁴, M. Rubinskiene ⁵, J. Lanauskas ⁵, N. Uselis ⁵

Affiliations
1 Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kauno 30, Babtai, Kaunas distr., LT-54333, Babtai, LT
2 Lithuanian University of Health Sciences, Kaunas, LT
3 Lithuanian University of Health Sciences, Kaunas
4 Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Babtai,, LT
5 Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Babtai, LT

Abstract

The effect of weather conditions and eleven apple rootstocks was studied on the phenol content in fruits. Super-dwarf rootstocks P 61 and P 22 determined the highest content of all phenolic compounds tested. Dwarf rootstocks M.9, P 62 and semi-dwarf M.26 determined lower content of all phenolic compounds tested. The content of (+)-catechin, procyanidin B1 and total procyanidins content in apple fruits depended on rootstock genotype and high variation coefficient of these compounds between rootstocks was established. Rootstocks had a lesser effect on the content of quercitrin, (-)-epicatechin, total catechins, phloridzin and chlorogenic acid. No clear differences were found between super-dwarf, dwarf and semi-dwarf rootstock groups. Conditions during the growing season, yield and fruit weight impacted on the content of bioactive compounds. Less than 10% difference in total phenols between the growing seasons was recorded for M.26 and P 22. The greatest differences were recorded in the fruits from trees grown on M.9, Pure 1 and P 66 rootstocks. Rootstock B.396 determined the most stable content of all compounds analysed, except for procyanidin B1 and B2.

Keywords

Polyphenols, Malus ×, domestica, Phenylpropanoid Metabolism, Antioxidant Compounds.

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