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Naoussa, Greece

Koutinas N.,Alexander Technological Educational Institute of Thessaloniki | Roubos K.,Alexander Technological Educational Institute of Thessaloniki | Sotiropoulos T.,Pomology Institute Nagref | Therios I.,Aristotle University of Thessaloniki
Acta Horticulturae | Year: 2013

Plants of the apple rootstocks 'M 9', 'M 26' and 'MM 106' were grown in a 1:1 sand: perlite mixture and irrigated with Hoagland's nutrient solutions containing three boron (B) concentrations (0.025, 0.2 and 0.4 mM). 'M 26' plants were able to maintain lower B concentrations in their leaves in comparison to 'M 9' and 'MM 106'. Chlorophyll content and photosynthetic rate of leaves from plants treated with 0.4 mM B were significantly lower in comparison to the control. Phosphorous and Zn concentrations of leaves were not significantly affected by rootstock and B concentration of the nutrient solution. Potassium, Mg, Fe and Mn concentrations of leaves were not significantly affected by B concentration of the nutrient solution. Potassium concentration of leaves of 'M 26' rootstock was significantly lower, whereas Mg and Mn concentrations were significantly higher in comparison to 'M 9' and 'MM 106', for all B concentrations used. By increasing B concentration in solution, Ca concentration of leaves of 'M 9' and 'M 26' rootstocks decreased, whereas that of 'MM 106' was not altered significantly. Source


Karayiannis I.,Pomology Institute Nagref
Acta Horticulturae | Year: 2010

Most of the European apricot cultivars have a bitter kernel taste. Sweet kernel taste is among the desirable traits in apricots, which is mostly found in Asiatic origin cultivars. 'Orangered', a PPV resistant, self-incompatible, with floral abnormalities, but with high fruit quality, sweet kernelled apricot cultivar of American origin, has been used as a male parent in a cross with the bitter kernelled, high fruit quality, local cultivar 'Bebecou'. The purpose of using these two parents was the possibility to select those hybrids that have inherited resistance to PPV and the most desirable characteristics such as productivity, high fruit quality, self-compatibility and sweet kernel taste. More than two hundred seedlings of this hybridization created in the year 2001 have been studied in the last two consecutive years regarding the taste of their seeds. The aim of this work was to investigate the mode of inheritance of the sweet kernel character in apricot in order to be considered, among others, for the selection of new cultivars. When the slightly bitter kernel was classified as sweet, the ratio of the bitter vs. sweet hybrids was 1:1. This consideration supports the hypothesis of a monogenic inheritance of the sweet kernel taste in apricot, after crossing a heterozygous bitter kernelled parent with a homozygous sweet. Source


Chatzicharissis I.,Pomology Institute Nagref | Kazantzis K.,Pomology Institute Nagref | Sotiropoulos T.,Pomology Institute Nagref | Koutinas N.,Alexander Technological Educational Institute of Thessaloniki
Acta Horticulturae | Year: 2013

The trees of the yellow sweet cherry (Prunus avium L.) cultivars in the experimental orchard were, grafted on cherry seedling rootstock (Mazzard) and trained as a typical vase shape planted at distances 6 x 6 m apart. The studied cultivars showed a wide range of the following characteristics; beginning of harvest: 23 May till 15 June, productivity: 30-115 kg per tree, mean fruit weight: 4.9-8.8 g, mean fruit length: 20.3- 23.5 mm, mean fruit width: 20.0-25.0 mm, total soluble solids: 16.3-21.1Brix, stone weight: 0.19-0.65 g, ratio of stone: fruit weight 1:8.8-1:26.2, length of leaf blade:10.6- 12.8 cm, and width of leaf blade:4.75-6.05 cm. The studied cultivars may have a potential for breeding purposes in the future due to their characteristics. Source


Chatzicharissis I.,Pomology Institute Nagref | Kazantzis K.,Pomology Institute Nagref | Sotiropoulos T.,Pomology Institute Nagref | Koutinas N.,Alexander Technological Educational Institute of Thessaloniki
Acta Horticulturae | Year: 2013

Sweet cherry trees (Prunus avium L.) of the cultivars 'Vasiliadi' and 'Ferrovia' were grafted on wild cherry seedling rootstock (mazzard), trained as a typical vase shape and planted at distances 6x6 m apart. The evaluation was done for 5 consecutive years. Trees of 'Vasiliadi' are vigorous (more vigorous than 'Ferrovia'), with an upright growth habit. The flower density of 'Vasiliadi' is high, similar to 'Ferrovia'. Both cultivars have an average of three flowers per fruit bud. The flowering of the cultivars 'Ferrovia' and 'Vasiliadi' starts at April 5 and 6, respectively. The trees require cross-pollination. 'Vasiliadi' sweet cherry is a mid-season, high-quality sweet cherry cultivar that matures 5 days earlier than 'Ferrovia'. Productivity and mean fruit weight of 'Vasiliadi' were higher than 'Ferrovia'. The fruit of 'Vasiliadi' are large, symmetrical, and kidney-shaped. Fruit of 'Vasiliadi' are juicy, sweet when mature, and have good eating quality. Total soluble solids of 'Vasiliadi' were higher than 'Ferrovia', whereas firmness was lower. 'Vasiliadi' fruit are attractive with mahogany skin color and pink-red flesh. Source


Petridis A.,Aristotle University of Thessaloniki | Koukourikou M.,Aristotle University of Thessaloniki | Sotiropoulos T.,Pomology Institute Nagref
HortScience | Year: 2010

The antioxidant activities (μmol ascorbic acid equivalent/g fresh weight) of the edible part of fruits grown in northern Greece were determined using the ferric-reducing antioxidant power (FRAP) assay. Differences were observed among species as well as cultivars of the same species. Cornelian cherry had the highest FRAP value followed by jujube. Cherries, black grapes, and blackberry showed high activity followed by pears, persimmons, plums, peaches, white grapes, pomegranates, apples, nectarines, kiwifruits, quinces, figs, and apricots. Source

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