Template-Type: ReDIF-Article 1.0 Author-Name: J. Goliáš Author-Workplace-Name: Faculty of Horticulture, Mendel University of Agriculture and Forestry in Brno, Lednice, Czech Republic Author-Name: P. Mýlová Author-Workplace-Name: Faculty of Horticulture, Mendel University of Agriculture and Forestry in Brno, Lednice, Czech Republic Author-Name: A. Němcová Author-Workplace-Name: Faculty of Horticulture, Mendel University of Agriculture and Forestry in Brno, Lednice, Czech Republic Title: A comparison of apple cultivars regarding ethylene production and physico-chemical changes during cold storage Abstract: Measurements of titratable acidity, soluble solids, firmness, ethylene production and weight loss were made for five apple cultivars held in cold storage for 100 days. Carbosieve G in the traps of the enrichment column, which has only a moderate affinity for light hydrocarbons, was found to meet the requirements for the optimal thermal desorption of ethylene (130°C for 2 minutes) from the enrichment column to the analytical column. ANOVA showed significant differences in all these five parameters between the five cultivars Golden Delicious Reinders, Resista, Topaz, Meteor and Rubinstep, and also in the course of storage. In all cases, the changes in titratable acids measured during storage were especially significant, but the observed changes in sugar levels, as measured by refractometry, were too variable to be useful in this context. High rates of ethylene production impacted probably only indirectly on the loss of firmness and the other parameters which were measured. Discriminant analysis of the measurements of firmness, ethylene production and titratable acid provided the best means of differentiating the cultivars, although Golden Delicious Reinders and Resista still could not be completely separated. Other parameters (soluble solids and loss in weight) did not contribute to the discriminant resolution. Keywords: apple cultivars, composition, ethylene production, firmness, headspace gas analysis Journal: Horticultural Science Pages: 137-144 Volume: 35 Issue: 4 Year: 2008 DOI: 10.17221/653-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/653-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200804-0001.txt Handle: RePEc:caa:jnlhor:v:35:y:2008:i:4:id:653-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: R. Pokluda Author-Workplace-Name: Faculty of Horticulture, Mendel University of Agriculture and Forestry in Brno, Lednice, Czech Republic Title: Nutritional quality of Chinese cabbage from integrated culture Abstract: The evaluation of nutritional quality of Chinese cabbage and the effects of cultivar, weed incidence, plant density and growing season were observed in integrated cultivation system. Mean contents of analysed compounds were as follows: 6% of dry matter, 10% of crude fibre, (in mg/kg of f.m.): 2,199 mg K, 289 mg Ca, 146 mg Mg, 111 mg Na, and 316 mg of vitamin C. Mean content of nitrates reached the value of 647 mg/kg. A significant effect of cultivar on the content of all observed substances in cabbage heads excluding magnesium was thus confirmed; however, a decrease of nitrates was found in the treatment with higher plant density. Weed cultivation caused slightly (insignificantly) higher nitrates content in cabbage heads by 100 mg/kg. Growing season showed a significant effect on content of some evaluated compounds. Integrated cultivation of Chinese cabbage could be an adequate approach to ensure nutritionally valuable products with low nitrates content. Keywords: Chinese cabbage, integrated production, nutritional value, nitrates Journal: Horticultural Science Pages: 145-150 Volume: 35 Issue: 4 Year: 2008 DOI: 10.17221/19/2008-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/19/2008-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200804-0002.txt Handle: RePEc:caa:jnlhor:v:35:y:2008:i:4:id:19-2008-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: T. Nečas Author-Workplace-Name: Faculty of Horticulture, Mendel University of Agriculture and Forestry in Brno, Lednice, Czech Republic Author-Name: F. Kobza Author-Workplace-Name: Faculty of Horticulture, Mendel University of Agriculture and Forestry in Brno, Lednice, Czech Republic Title: Resistance of Chinese asters (Callistephus chinensis Nees.) to Fusarium wilts (Fusarium oxysporum f. sp. callistephi (Beach) Snyder and Hansen) evaluated using artificial inoculations Abstract: The resistance of Chinese asters to Fusarium wilt was tested by artificially inoculating the root systems. A mixture of Fusarium isolates was prepared with a concentration of about 104-109 propagules per litre of the pathogen. 63 cultivars of both domestic and foreign origin were evaluated in the 1st year, 95 in the 2nd year and 89 in the 3rd year. Clear, statistically valid differences in mortality, both with experiments involving artificial inoculations and considering natural infections, make it possible to divide aster varieties into three groups based in their resistance to infections. The first set can be described as resistant. This includes the Matsumoto, Einf. Madeleine and Americká kráska series, and several others. The second set can be described as being moderately resistant. This includes the Chryzantémokvěté and Standy series, and the cultivars Matsumoto Pink, Princes Armida and Jitka. The third set can be described as sensitive. This includes the Průhonický trpaslík, Jehlicovité and Pastel series and several others. A statistical analysis of the results shows that the Einf. Madeleine series of cultivars is the most resistant to Fusarium wilt. This series is phenotypically similar to the original botanical species. Resistance was evaluated by recording the differences in mortality rates between artificially-inoculated plants and non-inoculated group (controls). Keywords: Callistephus, Fusarium, resistance, inoculation, cultivars Journal: Horticultural Science Pages: 151-161 Volume: 35 Issue: 4 Year: 2008 DOI: 10.17221/656-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/656-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200804-0003.txt Handle: RePEc:caa:jnlhor:v:35:y:2008:i:4:id:656-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: H. Celik Author-Workplace-Name: Department of Horticulture, Faculty of Agriculture, Ondokuz mayis University, Samsun, Turkey Author-Name: B. Kose Author-Workplace-Name: Department of Horticulture, Faculty of Agriculture, Ondokuz mayis University, Samsun, Turkey Author-Name: R. Cangi Author-Workplace-Name: Department of Horticulture, Faculty of Agriculture, Gaziosmanpasa University, Tokat, Turkey Title: Determination of Fox grape genotypes (Vitis labrusca L.) grown in Northeastern Anatolia Abstract: Northeastern part of Anatolia is a gene center of grapevine and a wide diversity of Fox grapes grow here. Viticulture and some grapevines in the Black Sea Region (in the north of Turkey) are on the verge of extinction; several types and varieties grown in this region have never been described and did not survive till present. For the past 10 years vineyards and grapevines in the Black Sea Region have been studied. In the present study, eighteen grapevines of foxy taste grown in the Artvin and Rize provinces were described. An ampelographic description of young shoot, mature shoot, young leaf, mature leaf, berry, bunch and seed were carried out using the OIV (Office International de la Vigne et du Vin) list for grapevine cultivars and Vitis species. However, several other parameters of the cultivars were measured for evaluation. Keywords: Fox grape (Vitis labrusca L.), description, OIV, UPOV, Turkey Journal: Horticultural Science Pages: 162-170 Volume: 35 Issue: 4 Year: 2008 DOI: 10.17221/655-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/655-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200804-0004.txt Handle: RePEc:caa:jnlhor:v:35:y:2008:i:4:id:655-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: N. Beyhan Author-Workplace-Name: Department of Horticulture, Faculty of Agriculture, Ondokuz Mayis University, Samsun, Turkey Author-Name: U. Serdar Author-Workplace-Name: Department of Horticulture, Faculty of Agriculture, Ondokuz Mayis University, Samsun, Turkey Title: Assessment of pollen viability and germinability in some European chestnut genotypes (Castanea sativa L.) Abstract: Pollen viability and germinability in some European chestnut genotypes was assessed in this study. In 10 chestnut genotypes, percentages of pollen viability were generally high and often around or over 80%. The pollen germination percentages of the genotypes were significantly affected by media sucrose concentrations. At optimum sucrose concentrations pollen germination percentages varied between 21.97 and 43.68% in 2004, 3.95 and 31.97% in 2005 and 6.79 and 31.03% in 2006, across all genotypes. The highest pollen germination percentage was obtained from 10% sucrose concentration in all years. Although, in 2006, a highly marked positive correlation (r = 0.80) was determined for the viability and germination percentages, no significant relation between the viability and germination percentages r = -0.54 and r = -0.05, respectively) was found in 2004 and 2005. In 2005 and 2006, germination percentages declined compared to 2004. Keywords: Castanea sativa L., pollen viability, pollen germination Journal: Horticultural Science Pages: 171-178 Volume: 35 Issue: 4 Year: 2008 DOI: 10.17221/23/2008-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/23/2008-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200804-0005.txt Handle: RePEc:caa:jnlhor:v:35:y:2008:i:4:id:23-2008-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: editors Title: Index of volume 35 Journal: Horticultural Science Pages: X1 Volume: 35 Issue: 4 Year: 2008 DOI: 10.17221/652-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/652-HORTSCI.html File-Format: text/html Handle: RePEc:caa:jnlhor:v:35:y:2008:i:4:id:652-HORTSCI