Template-Type: ReDIF-Article 1.0 Author-Name: V. Paganová Author-Workplace-Name: Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovakia Title: The occurrence and morphological characteristics of the wild pear lower taxa in Slovakia Abstract: The occurrence of 10 lower taxa within species Pyrus pyraster L. (Burgsd.) was confirmed in Slovakia. Among 507 of the evaluated plants on 64 localities, there were recorded 2 sub-species of the wild pear - Pyrus pyraster subsp. pyraster and Pyrus pyraster subsp. achras . Subspecies pyraster was represented by 4 varieties (pyraster, elongata, pénzesiana, brachypoda ) and 5 forms (populifolia, cordifolia, rhomboidea, ovata, slovenica ). All lower taxa were visually classified according to the leaf and fruit characteristics. Numerical classification based on discriminant analysis according to quantitative traits was done. Some discrepancies were found up to 16.7% between visual and numerical classification on particular levels of the lower taxa identification. Keywords: wild pear, lower taxa, occurrence, morphology, leaves, fruits Journal: Horticultural Science Pages: 1-13 Volume: 36 Issue: 1 Year: 2009 DOI: 10.17221/5/2008-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/5/2008-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200901-0001.txt Handle: RePEc:caa:jnlhor:v:36:y:2009:i:1:id:5-2008-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: T. Juríková Author-Workplace-Name: Institute of Natural Science and Informatics, Faculty of Central European Studies, UKF Nitra, Slovakia Author-Name: J. Matuškovič Author-Workplace-Name: Department of Fruit and Vine Growing and Vine-dressing, Slovak University of Agriculture, Nitra, Slovakia Author-Name: Z. Gazdík Author-Workplace-Name: Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry in Brno, Czech Republic Title: Effect of irrigation on intensity of respiration and study of sugar and organic acids content in different development stages of Lonicera kamtschatica and Lonicera edulis berries Abstract: This article investigates the effect of irrigation on the intensity of respiration of Lonicera kamtschatica and Lonicera edulis during different stages of fruit development in the conditions of Nitra in 2002 and 2003. Changes in organic acids and sugar content during fruit ripening process were also monitored within non-irrigated variant of Lonicera kamtschatica and Lonicera edulis in 2002. The intensity of respiration can be divided into 4 stages corresponding with intensive cell division of fruit (stage I), enlargement of fruit pericarp and fruit colouring (stage II) and fruit softening (stage III). In the early stages of fruit development the intensity of respiration increased (stage I), then declined (stage II), and then increased again to the "climacteric peak" (stage III). In this stage fruit achieved the best quality for direct consumption; it was characterized by the highest sugar content (9.5% in Lonicera kamtschatica and 7.7% in Lonicera edulis ) and the lowest organic acids content (3.61% in Lonicera kamtschatica and 3.32% in Lonicera edulis ). After this stage, fruit became overripe and its quality declined (stage IV). During the two-year observation, there were no statistically significant differences in respiration intensity of fruits of Lonicera kamtschatica and Lonicera edulis grown with or without irrigation. Keywords: intensity of respiration, content of sugar and organic acids, irrigation, Lonicera kamtschatica (Sevast.) Pojark., Lonicera edulis Turcz. ex Freyn Journal: Horticultural Science Pages: 14-20 Volume: 36 Issue: 1 Year: 2009 DOI: 10.17221/45/2008-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/45/2008-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200901-0002.txt Handle: RePEc:caa:jnlhor:v:36:y:2009:i:1:id:45-2008-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: P. Bímová Author-Workplace-Name: Faculty of Horticulture, Mendel University of Agriculture and Forestry in Brno, Lednice, Czech Republic Author-Name: R. Pokluda Author-Workplace-Name: Faculty of Horticulture, Mendel University of Agriculture and Forestry in Brno, Lednice, Czech Republic Title: Impact of organic fertilizers on total antioxidant capacity in head cabbage Abstract: In recent years, the agri-food sector and consumers have begun to look at food not only for basic nutrition, but also for health benefits. The purpose of this study was to investigate the variations in the total antioxidant capacity (TAC) in head cabbage according to the used type of fertilizer. Commercial brands of alternative, organic fertilizers were compared with conventional, mineral fertilizers in culture of head cabbage. There were seven different treatments: Agormin, Agro, farmyard manure, horticultural compost, Dvorecký agroferm, mineral fertilizer, and an unfertilized control. All the treatments assured approximately the same level of nutrients. The level of TAC was measured by the FRAP assay and the effect of storage on TAC was also studied. Average value of TAC in fresh cabbage was 236 ± 60 mg GA/100 g in the year 2005 and 295 ± 27 mg GA/100 g in the year 2006. The TAC value decreased in the course of storage. The average value of TAC after a five-month period of storage was 56 ± 18 mg GA/100 g in the year 2005 and 33 ± 5 mg GA/100 g in the year 2006. This study shows that alternative, organic fertilizers have similar or even better qualities than farmyard manure and that they can contribute to the improvement of nutritional values of vegetable. Keywords: alternative organic fertilizer, cabbage, FRAP, storage, total antioxidant capacity Journal: Horticultural Science Pages: 21-25 Volume: 36 Issue: 1 Year: 2009 DOI: 10.17221/9/2008-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/9/2008-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200901-0003.txt Handle: RePEc:caa:jnlhor:v:36:y:2009:i:1:id:9-2008-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: V. Pandey Author-Workplace-Name: Defence Agricultural Research Laboratory, Pithoragarh, Uttaranchal, India Author-Name: H. K. Pandey Author-Workplace-Name: Defence Agricultural Research Laboratory, Pithoragarh, Uttaranchal, India Author-Name: D. Dayal Author-Workplace-Name: Defence Agricultural Research Laboratory, Pithoragarh, Uttaranchal, India Author-Name: U. C. Joshi Author-Workplace-Name: Defence Agricultural Research Laboratory, Pithoragarh, Uttaranchal, India Author-Name: T. Pant Author-Workplace-Name: Defence Agricultural Research Laboratory, Pithoragarh, Uttaranchal, India Author-Name: Z. Ahmed Author-Workplace-Name: Defence Agricultural Research Laboratory, Pithoragarh, Uttaranchal, India Title: Studies on antioxidant constituents of some domesticated capsicums in the middle hill conditions of western Himalayas Abstract: The objective of this study was to determine some cultivars suitable for their antioxidant constituents, which can further be used in breeding programmes to breed superior varieties and F1 for higher quality attributes. Thirty cultivars of domesticated capsicums were grown and analyzed during 2006-2007; they showed significant variation in their ascorbic acid and capsaicinoids contents. On the basis of ascorbic acid, the rank order of cultivars was PBC-926 > Chilli Long Black > HC-201 > KT OV > Local D-2. On the basis of capsaicinoids content, five top cultivars were selected, namely DARL-210 > Naga Jalokia > Red Sabina > CO-6-1 > Chilli Long Black. Keywords: antioxidant, cultivar, ascorbic acid, capsaicinoids, HPLC Journal: Horticultural Science Pages: 26-30 Volume: 36 Issue: 1 Year: 2009 DOI: 10.17221/18/2008-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/18/2008-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200901-0004.txt Handle: RePEc:caa:jnlhor:v:36:y:2009:i:1:id:18-2008-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: P. Jadrná 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 Author-Name: O. Plavcová Author-Workplace-Name: Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Průhonice, Czech Republic Title: Polyploidization of Pelargonium × hortorum L. H. Bailey in greenhouse conditions Abstract: This study is aimed at induction of polyploidy in the black-leaved cultivar Pelargonium × hortorum L. H. Bailey Black Velvet Scarlet F1 to obtain basic breeding material for creating new black-leaved tetraploid cultivars. The cultivar Gizela F1 was chosen as a control for the experiment. Tetraploidy was induced in seedlings in the cotyledon stage using various concentrations (from 0.1 to 2.5%) of colchicine water solutions; the treatments were repeated daily for 2, 3, 5 or 7 successive days. The first experiment, done in 2005, was very successful; 17.4% of treated Black Velvet Scarlet F1 plants and 23.7% of treated Gizela F1 plants were tetraploid, and other ploidy levels were also found. However, two other replications from 2006 (involving only five best treatments from the first experiment) were much less successful in comparison with the first one. Keywords: Pelargonium × hortorum, zonal pelargonium, Black Velvet Scarlet F1, colchicine, induced polyploidy, flow cytometry Journal: Horticultural Science Pages: 31-37 Volume: 36 Issue: 1 Year: 2009 DOI: 10.17221/29/2008-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/29/2008-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200901-0005.txt Handle: RePEc:caa:jnlhor:v:36:y:2009:i:1:id:29-2008-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: M. Dubský Author-Workplace-Name: Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Průhonice, Czech Republic Author-Name: F. Šrámek Author-Workplace-Name: Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Průhonice, Czech Republic Title: The effect of rockwool on physical properties of growing substrates for perennials 38 Abstract: The possibility of peat replacement with crushed water absorbent rockwool in growing substrates in the amount of 35% vol. was verified in the experiment with perennials in containers. Three types of substrates, i.e. peat, and two mixtures of peat with alternative components - green waste compost (25% vol.) or composted spruce bark (40% vol.) were compared. A sand box in the range of -0.5 to -10 kPa was used to determine retention curves and other physical properties of the components and substrates. The addition of rockwool to the peat substrate increased content of air and easy available water, the plant growth was not affected. Plants grown in substrates with alternative organic components were smaller in comparison to peat substrate. The growth of perennials significantly decreased, mainly in substrates with bark, but the plants had good market value. The addition of rockwool to these substrates had no significant effect on the growth. Crushed rockwool in the amount of 35% vol. can replace peat in peat substrates and in mixtures with alternative components. Keywords: peat, alternative organic components, crushed rockwool, retention curves, perennials Journal: Horticultural Science Pages: 38-43 Volume: 36 Issue: 1 Year: 2009 DOI: 10.17221/22/2008-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/22/2008-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200901-0006.txt Handle: RePEc:caa:jnlhor:v:36:y:2009:i:1:id:22-2008-HORTSCI