Horticultural Science, 2013 (vol. 40), issue 3
Grouping of 24 apple cultivars on the basis of starch degradation rate and their fruit patternOriginal Paper
L. Szalay, M. Ordidge, G. Ficzek, P. Hadley, M. Tóth, N.H. Battey
Hort. Sci. (Prague), 2013, 40(3):93-101 | DOI: 10.17221/143/2012-HORTSCI 
The ripening processes of 24 apple cultivars were examined in the United Kingdom NationalFruit Collection in 2010. Basically the starch content, and additionally ground colour, water-soluble solids content and flesh firmness were studied during ripening. The degradation of the starch content was evaluated using a 0-10 scale. A starch degradation value of 50% was taken to be the optimum harvest date, with harvest beginning at a value of 40% and finishing at 60%. Depending on the cultivar, this represented a harvest window of 9 to 21 days. Later ripening cultivars matured more slowly, leading to a longer harvesting period, with the exception of cv. Feuillemorte....
Physico-chemical changes and volatile constituents observed in 10 apricot cultivars during post-harvest ripeningOriginal Paper
J. GOLIÁŠ, J. LÉTAL, L. DOKOUPIL, B. KRŠKA
Hort. Sci. (Prague), 2013, 40(3):102-110 | DOI: 10.17221/72/2012-HORTSCI
Physico-chemical changes included a significant decrease in firmness during post-harvest ripening, whereas the levels of total soluble solids were found to be very similar. Ethylene as a parameter of ripening contributed to the resolution of cultivars in the over-ripe phase. On the other hand, fruit softening was not a useful parameter for distinguishing cultivars. 59 of volatiles were determined by the static headspace SPME gas chromatography with mass spectrometry and included 18 alcohols, 12 aldehydes, 10 esters, 11 terpenes, 5 lactones and 3 miscellaneous. Actually, the production of alcohols at ripe stage had almost been completed, since at the...
Effect of Humisol on survival and growth of nursery grafted walnut (Juglans regia L.) plantsOriginal Paper
S.M. Paunović, R. Miletić, D. Janković, S. Janković, M. Mitrović
Hort. Sci. (Prague), 2013, 40(3):111-118 | DOI: 10.17221/78/2013-HORTSCI
The effect of Humisol organic fertiliser (150 g humic acid/l + 20 g/l mineral nutrients) on plant survival and growth of five walnut cultivars grown over a period of two years in the nursery were evaluated. Walnut plants treated with Humisol at the total annual rate of 0.75 ml/plant had a significantly higher survival rate in the first year, greater height and diameter in both years, and a higher percentage of first-class plants at the end of the second year, as compared to untreated control plants. Soil application of Humisol led to better performance of nursery grafted plants, compared to foliar application. Nursery plants receiving 1.5 ml Humisol...
Interaction of soil moisture and excess of boron and nitrogen on lettuce growth and qualityOriginal Paper
G. Ouzounidou, C. Paschalidis, D. Petropoulos, A. Koriki, P. Zamanidis, A. Petridis
Hort. Sci. (Prague), 2013, 40(3):119-125 | DOI: 10.17221/15/2013-HORTSCI
A study of the effects of boron (10 mg/kg as H3BO3) and nitrogen (0-0.15-0.30-0.45-0.60 g/kg) fertilization in combination with soil water capacity (40% and 70%) on lettuce growth and nutritional value was performed. The effects of the simultaneous application of N and B depend on the soil moisture, since lower water in the soil reduced lettuce growth and quality. Linear correlation was found between N fertilization and lettuce yield and quality at the two water soil capacities. Only when N fertilization exceeded 0.45 g/kg the fresh and dry biomass, photosynthesis, sugars and ascorbic acid showed negative influence as compared...
Effect of mycorrhization on the flowering of the Zantedeschia albomaculata /Hook./ Baill. cv. AlbomaculataOriginal Paper
B. Janowska, R. Andrzejak, T. Kosiada, T. Trelka, B. Frąszczak
Hort. Sci. (Prague), 2013, 40(3):126-130 | DOI: 10.17221/6/2013-HORTSCI
The study involved the application of a top dressing of a multicomponent Peters Professional fertiliser at concentration of 100 and 200 mg/l in the amount of 100 ml/plant, once every 7 days regardless of the fact whether the rhizomes had been mycorrhized before or not. Mycorrhization caused an increase in the quality of flowers, as expressed by peduncle length and their yield in Zantedeschia albomaculata cv. Albomaculata at both levels of top dressing, which shows that it is possible to reduce the top dressing dosage to a concentration of 100 mg/l. Mycorrhization had a favourable effect on the accumulation of nitrogen and manganese in the...
Importance of population size for offspring fitness at conservation of the gene pool of cultivarsOriginal Paper
H. Urbánek, V. Benetka
Hort. Sci. (Prague), 2013, 40(3):131-137 | DOI: 10.17221/179/2012-HORTSCI
Effective population size for conservation of cultivated plants was studied in Coreopsis grandiflora on populations in variants of 1, 5, 10, 30, 50 and 100 individuals. In five consecutive years these traits were studied on seeds originating from parental populations: seed number and weight per infructescence, thousand seed weight and germination. Plant height and flower size were investigated in a field trial. The influence of population size was expressed mainly in traits of early life-history stages. Inbreeding depression influenced germination already in the first year and was similar for the five years while seed weight was influenced...
Fungi associated to grapevine trunk diseases in young plants in Asturias (Northern Spain)Original Paper
P. Moreno-Sanz, G. Lucchetta, A. Zanzotto, M.D. Loureiro, B. Suarez, E. Angelini
Hort. Sci. (Prague), 2013, 40(3):138-144 | DOI: 10.17221/9/2013-HORTSCI
Dark discolorations of the vascular vessels of 3-year-old potted plants of Asturian grapevine cultivar (Northern Spain), were observed during pruning. These symptoms can be associated to fungal trunk diseases that, in the last decades, are affecting young vineyards all over the world. Cross sections from root, trunk and canes of 19 young grapevine plants were analyzed for the presence of pathogenic fungi associated with these diseases. Non-pathogenic fungi were isolated from both asymptomatic and symptomatic samples, showing that dark discolorations, in some cases, were a consequence of abiotic causes. Regarding pathogenic fungi, Cylindrocarpon...