Template-Type: ReDIF-Article 1.0 Author-Name: J. Blažek Author-Workplace-Name: Research and Breeding Institute of Pomology, Holovousy, Czech Republic Author-Name: R. Karešová Author-Workplace-Name: Research and Breeding Institute of Pomology, Holovousy, Czech Republic Title: Influence of infection of a tree by Plum pox virus on further spread of the disease within a plum orchard Abstract: 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 of infection of plum trees by PPV. This fact also highlights the significance of timely grubbing of affected trees immediately after an appearance of symptoms of this viral disease. Keywords: PPV, rate of infection, plum orchard, spread of PPV Journal: Horticultural Science Pages: 1-3 Volume: 29 Issue: 1 Year: 2002 DOI: 10.17221/4462-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/4462-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200201-0001.txt Handle: RePEc:caa:jnlhor:v:29:y:2002:i:1:id:4462-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: J. Balík Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice na Moravì, Czech Republic Author-Name: J. Goliáš Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice na Moravì, Czech Republic Author-Name: J. Veverka Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice na Moravì, Czech Republic Author-Name: M. Kyseláková Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice na Moravì, Czech Republic Author-Name: A. Němcová Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice na Moravì, Czech Republic Author-Name: L. Šuderlová Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice na Moravì, Czech Republic Author-Name: J. Vejrosta Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice na Moravì, Czech Republic Title: Wine volatiles composition in the sensory evaluation of bouquet and flavour of two vine cultivars Abstract: 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 vine cultivars via sensory descriptors is statistically feasible only by nutty and caramel descriptors in the case of bouquet and by big fruit for flavour. Keywords: wine, sensory analysis, aroma compounds, supercritical fluid extraction/CGC analysis Journal: Horticultural Science Pages: 4-11 Volume: 29 Issue: 1 Year: 2002 DOI: 10.17221/4463-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/4463-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200201-0002.txt Handle: RePEc:caa:jnlhor:v:29:y:2002:i:1:id:4463-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: J. Pazdera Author-Workplace-Name: Czech University of Agriculture, Prague, Czech Republic Author-Name: V. Hosnedl Author-Workplace-Name: Czech University of Agriculture, Prague, Czech Republic Title: Effect of hydration treatments on seed parameters of different lettuce (Lactuca sativa L.) seed lots Abstract: 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 hydration also depends on the hydration method and time of treatment. The osmopriming is a more suitable method for lettuce seed than prehydration. Generally, a shorter time of hydration (till 6 hours at prehydration and till 72 hours at priming) proved more effective on the parameters of lettuce seed lots after treatment. Keywords: lettuce, seed, treatment, prehydration, osmotic priming, germination Journal: Horticultural Science Pages: 12-16 Volume: 29 Issue: 1 Year: 2002 DOI: 10.17221/4464-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/4464-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200201-0003.txt Handle: RePEc:caa:jnlhor:v:29:y:2002:i:1:id:4464-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: S.I. Ignatova Author-Workplace-Name: Selection & Seed Production Agrocompany "Iljinicha, Llc", Moscow, Russia Author-Name: L.M. Kušč Author-Workplace-Name: Selection & Seed Production Agrocompany "Iljinicha, Llc", Moscow, Russia Author-Name: L. Bilisics Author-Workplace-Name: Selection & Seed Production Agrocompany "Iljinicha, Llc", Moscow, Russia Author-Name: L. Trinh Author-Workplace-Name: Selection & Seed Production Agrocompany "Iljinicha, Llc", Moscow, Russia Author-Name: N.N. Tiuliaeva Author-Workplace-Name: Selection & Seed Production Agrocompany "Iljinicha, Llc", Moscow, Russia Author-Name: M.G. Sedova Author-Workplace-Name: Selection & Seed Production Agrocompany "Iljinicha, Llc", Moscow, Russia Title: Sucrase in immobilized cells of Cucumis sativus L. Abstract: 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. Keywords: glutaraldehyde, sucrase, cell permeabilization, cell immobilization, Cucumis sativus L Journal: Horticultural Science Pages: 17-22 Volume: 29 Issue: 1 Year: 2002 DOI: 10.17221/4465-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/4465-HORTSCI.html File-Format: text/html Handle: RePEc:caa:jnlhor:v:29:y:2002:i:1:id:4465-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: J. Kosina Author-Workplace-Name: Research and Breeding Institute of Pomology, Holovousy, Czech Republic Title: Evaluation of some dwarf apple rootstocks Abstract: 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 like on Pajam 1. Trees on J-TE-E and J-TE-F grew less than those on M 9. The weakest growth was observed on rootstocks M 27 and J-TE-G. Among the tested rootstocks, J-OH-A produced the highest number of suckers. Suckering was more intensive with Melrose followed by Gloster and Golden Delicious. Keywords: apple, rootstock, growth vigour, yield, suckering Journal: Horticultural Science Pages: 23-25 Volume: 29 Issue: 1 Year: 2002 DOI: 10.17221/4466-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/4466-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200201-0005.txt Handle: RePEc:caa:jnlhor:v:29:y:2002:i:1:id:4466-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: C.G. Tsipouridis Author-Workplace-Name: Pomology Institute, Naoussa, Greece Author-Name: X. Papanikolaou Author-Workplace-Name: Pomology Institute, Naoussa, Greece Author-Name: D.C. Stylianidis Author-Workplace-Name: Pomology Institute, Naoussa, Greece Title: Adaptation of peach-nectarine varieties to different soil and climatic conditions of Greece Abstract: 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 studied for 12-18 years in three experimental orchards of Peripheral Agricultural Research Station of Rhodes (PARSR). Their degree of adaptation to the soil and climatic conditions of PARSR was evaluated in terms of yield per tree, time of bloom, time of fruit ripening, fruit quality etc. These results have been compared with related experimental data recorded at the Pomology Institute (PI) at Naoussa. The results indicate that: many peach-nectarine varieties with quite high chilling requirements (Loring, Blake) gave satisfactory yield in PARSR, where the mean average of temperatures below 7°C over one decade was found to be 147 hours (range 52-226). Some peach-nectarine varieties in experimental orchards of PARSR ripened more than ten days earlier (Desert Gold, Early Red, Peach of Station, Loring, Merril Gem Free), of others at about the same time (Coronet, Cotonia Massima, Red Skin, Fertilia Morettini, Red Globe) and at others on a later date (Merril Fortyminer, Early Elberta, J.H. Hale, Cardinal, Southhaven) than they would ripen in northern Greece (PI). Similar differences were also found for the time of blooming. Keywords: peaches, nectarines, chilling, adaptation, climatic conditions, time of ripening, time of flowering, yields Journal: Horticultural Science Pages: 26-34 Volume: 29 Issue: 1 Year: 2002 DOI: 10.17221/4467-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/4467-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200201-0006.txt Handle: RePEc:caa:jnlhor:v:29:y:2002:i:1:id:4467-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: I. Ajalin Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice na Moravì, Czech Republic Author-Name: F. Kobza Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice na Moravì, Czech Republic Author-Name: J. Doležel Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice na Moravì, Czech Republic Title: Ploidy identification of doubled chromosome number plants in Viola × wittrockiana Gams. M 1-generation Abstract: 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. Keywords: flow cytometry, polyploidisation, colchicine, hexadecaploids, polyploidisation efficiency, morphological characteristics, Viola × wittrockiana Gams Journal: Horticultural Science Pages: 35-40 Volume: 29 Issue: 1 Year: 2002 DOI: 10.17221/4468-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/4468-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200201-0007.txt Handle: RePEc:caa:jnlhor:v:29:y:2002:i:1:id:4468-HORTSCI