Horticultural Science, 2002 (vol. 29), issue 1
Influence of infection of a tree by Plum pox virus on further spread of the disease within a plum orchard
J. Blažek, R. Karešová
Hort. Sci. (Prague), 2002, 29(1):1-3 | DOI: 10.17221/4462-HORTSCI 
Occurrence of plum pox disease after natural infection was continually monitored between 1993 and 2000 in an experimental planting of plum trees where cultivars and hybrid seedlings were evaluated. All trees after finding symptoms of this disease were immediately grubbed. Summarization of the results has proved that infection of a tree significantly increased the risk of infection of neighbouring trees despite the fact that all infected trees were discarded. In the case of adjoining trees nearby, those within the same row increased their hazard by approximately three times and those between rows doubled their hazard in comparison with the average rate...
Wine volatiles composition in the sensory evaluation of bouquet and flavour of two vine cultivars
J. Balík, J. Goliáš, J. Veverka, M. Kyseláková, A. Němcová, L. Šuderlová, J. Vejrosta
Hort. Sci. (Prague), 2002, 29(1):4-11 | DOI: 10.17221/4463-HORTSCI
Analytic measurement data acquired by an SFE/CGC analysis were compared with sensory evaluation of two wines from South Moravia. The sensory descriptive analysis showed a large variation in sensory quality from neutral character to full expression of the variety. Whereas the cluster analysis of volatiles was sufficient for differentiating both wines, the sensory observation data based on seven descriptors did not suffice either for bouquet or flavour characteristic. The descriptor citrus could be related to analytically established substances whose statistical significance was supported by a stepwise multiple analysis. The possibility of recognising...
Effect of hydration treatments on seed parameters of different lettuce (Lactuca sativa L.) seed lots
J. Pazdera, V. Hosnedl
Hort. Sci. (Prague), 2002, 29(1):12-16 | DOI: 10.17221/4464-HORTSCI
The influence of hydration treatments on seed parameters of lettuce seed lots with different initial quality was investigated. Nine seed lots were treated by prehydration (for 3, 6, 12 and 24 hours) and by osmopriming in polyethylene glycol 6,000 solution (for 24, 72 and 144 hours) with osmotic potential -1.5 MPa. The result of hydration treatment depends on seed lot attributes. The germination percentage is not a sufficient criterion for determination of seed suitability for hydration treatment. A possible complementary parameter can be the mean time of germination (MTG) with high correlation between untreated and treated seed lots. The effect of...
Sucrase in immobilized cells of Cucumis sativus L.
S.I. Ignatova, L.M. Kušč, L. Bilisics, L. Trinh, N.N. Tiuliaeva, M.G. Sedova
Hort. Sci. (Prague), 2002, 29(1):17-22 | DOI: 10.17221/4465-HORTSCI
Cell suspension cultures of Cucumis sativus L. - cucumber were permeabilized by Tween, hexadecyltri-methylammonium bromide, hexadecylpyridiniumbromide ethanol and/or immobilized by glutaraldehyde. The highest invertase activity was at pH 4.4 and temperature 53°C. The hydrolysis of the substrate was linear for 5 h reaching 60% conversion. The cells displayed high sucrase activity and convenient physico-mechanical properties.
Evaluation of some dwarf apple rootstocks
J. Kosina
Hort. Sci. (Prague), 2002, 29(1):23-25 | DOI: 10.17221/4466-HORTSCI
Dwarf apple rootstocks M 9, M 27, Pajam 1, Pajam 2, Jork 9, J-TE-E, J-TE-F, J-TE-G and J-OH-A were evaluated in a trial conducted in an experimental orchard with cultivars Golden Delicious, Gloster and Melrose. The experimental plantation was established in 1990. Data on: yield (kg/tree), yield efficiency (kg/cm2), trunk cross-section area and suckering were recorded during the period 1991-2000. The cumulative yield per tree was highest on Jork 9 and Pajam 2. Trees on Pajam 1 and M 9 also had good productivity. Yield efficiency was highest on Jork 9, followed by M 27 and J-TE-G. Trees on Pajam 2 were most vigorous. The tree size on M 9 was similar...
Adaptation of peach-nectarine varieties to different soil and climatic conditions of Greece
C.G. Tsipouridis, X. Papanikolaou, D.C. Stylianidis
Hort. Sci. (Prague), 2002, 29(1):26-34 | DOI: 10.17221/4467-HORTSCI
Forty two peach-nectarine (Prunus persica [L.] Batsch.) varieties (i.e Spring Time, Precocissima Morettini, Southhaven, Halehaven, Blazing Gold, Cardinal, Gialla Precoce Morettini, Dixired, Fertilia Morettini, Golden Jubilee, Coronet, Red Haven, Red Globe, Cotonia Massima, Morettini 5/14, Peach of Station, Alexander, Early Elberta, Elberta of Middle Season, Beauty of Georgia, J.H. Hale, Late Elberta, Gold Drest, Morettini No. 1, Jerseyland, Desert Gold, Red Cup, Spring Crest, Loring, June Gold, Merril Gem Free, Early Red, Red Skin, Merril Fortyminer, Roubidoux, Fantasia, Sunhaven, Flavour Top, Merril Franciscan, Blake, Fairtime, Fayette) were...
Ploidy identification of doubled chromosome number plants in Viola × wittrockiana Gams. M 1-generation
I. Ajalin, F. Kobza, J. Doležel
Hort. Sci. (Prague), 2002, 29(1):35-40 | DOI: 10.17221/4468-HORTSCI
The aim of this study was to develop a protocol for production of polyploid M1-generation plants of Viola × wittrockiana Gams. Two variants of colchicine treatment were compared for their efficiency. Early detection of novel ploidy levels was achieved by screening of stomata size, leaf index value (leaf blade length/width), and other morphological characteristics of the M1-generation. Secondary screening for novel ploidy levels was performed by flow cytometry (FCM). Hexadecaploid, aneuploid, and mixoploid plants were successfully identified by FCM.