Horticultural Science, 2006 (vol. 33), issue 1
Ethylene production in apple infected by Gleosporium album Ostrw. at cold storage
J. Goliáš, A. Němcová, P. Mýlová
Hort. Sci. (Prague), 2006, 33(1):1-6 | DOI: 10.17221/3732-HORTSCI 
In ten cultivars of apple fruit, ethylene production expressed in μl/kg/h was determined. The cultivar Resista exhibited a higher ethylene production and can be differentiated from other cultivars. The production ranged from 4.2 ± 0.58 μl/kg/h in the case of Meteor cv. up to 131.6 ± 5.5 μl/kg/h in Resista cv. Infected fruit of Topaz cv. had a lower ethylene production at cold storage temperature (3°C) than some healthy fruit. All examined cultivars can be divided into three clusters. Discriminant analysis and canonical correlation analysis of the examined apple fruit led to the determination of healthy and infected fruit. Values...
The reliability of detection and the distribution of Apple chlorotic leafspot virus in pears in the Czech Republic
J. Polák, J. Svoboda
Hort. Sci. (Prague), 2006, 33(1):7-10 | DOI: 10.17221/3733-HORTSCI
The distribution of Apple chlorotic leafspot virus in pear cultivars in selected orchards of three different districts in the Czech Republic was evaluated by ELISA. The same procedure of DAS - ELISA as in apple trees, was used for the detection of ACLSV in pear trees. The detection of ACLSV in pear flower petals by ELISA was more sensitive than the ACLSV detection in leaves. ACLSV was detected in pear leaves in the reliable way only in June. The presence of ACLSV was not proved by ELISA in nine tested pear rootstocks. The different distribution of ACLSV was detected in pear cultivars Lucasova máslovka and Boscova lahvice grown in different...
Sphaeropsis tip blight disease of Austrian pine in urban greenery
G. Juhásová, K. Adamčíková, M. Kobza
Hort. Sci. (Prague), 2006, 33(1):11-15 | DOI: 10.17221/3734-HORTSCI
An extent of the damage of Austrian pine trees was evaluated in urban greenery in selected sites in Slovak Republic during the years 2004-2005. Fungi Sphaeropsis sapinea (Fr.: Fr.) Dyko & B. Sutton (syn. Diplodia pinea (Desm.) J. Kickx fil) and Pestalotia sp. were diagnosed on all observed trees. Symptoms of the disease were recorded. S. sapinea was isolated successfully from needles and from cone scales. The growth rate of hyphae of mycelium and the mean daily growth were evaluated on three types of cultivated media at different temperatures. The highest mean daily growth of mycelium was recorded on maltose...
Research on shortening the nursery period in grafted chestnut
E. Duman, U. Serdar
Hort. Sci. (Prague), 2006, 33(1):16-22 | DOI: 10.17221/3735-HORTSCI
The objective of this study was to determine the effects of inverted radicle and hypocotyl grafting methods on potted nursery tree production in chestnut. The study was carried out in greenhouse conditions in 2003-2004. Newly germinated chestnut seeds and young seedlings of SA 5-1 genotype were used as rootstocks and sprouts with dormant buds of the same genotype were used as scions. Graftings were done at three periods from April to June. Graft success and scion shoot growth were examined to determine a suitable method and time of grafting. It was found in the study that potted chestnut nursery trees could be produced in one year using either of the...
Effects of different bud loading levels on the yield, leaf and fruit characteristics of Hayward kiwifruit
R. Cangi, D. A. Atalay
Hort. Sci. (Prague), 2006, 33(1):23-28 | DOI: 10.17221/3736-HORTSCI
The effects of different levels of bud loading on the yield and some leaf and fruit characteristics in Hayward cultivar (A. deliciosa) in the province of Ordu, Turkey were examined during two growing seasons in 2000-2001. Six years old kiwifruit vines were pruned to carry the loads of 120, 180, 240 or 300 buds/vine on the canes with 12 buds. The study determined probable total leaf area (PTLA), probable total leaf number (PTLN), probable total leaf weight (PTLW) and yield per vine. Mean fruit weight (MFW) and soluble solid contents (SSC, %) of fruits were expressed. In addition, unit leaf area/100 g fruit weight (ULA/FW) was calculated. Leaf...
Variability and genotype × cutting interactions for different nutritional components in Chenopodium album L.
A. Bhargava, S. Shukla, B. S. Dixit, R. Bannerji, D. Ohri
Hort. Sci. (Prague), 2006, 33(1):29-38 | DOI: 10.17221/3737-HORTSCI
Thirteen germplasm lines of vegetable Chenopodium (C. album) were evaluated in a randomized block design with three replications to estimate the foliage yield and its seven contributing quality traits for three successive cuttings. The variability present in vegetable Chenopodium and interactions operating at various levels were also studied. The mean foliage yield was maximum for CA-II (3.03 ± 0.39 kg/plot), followed by CA-VII (2.94 ± 0.27 kg/plot) and CA-VI (2.41 ± 0.20 kg/plot). Moisture content showed a constant decrease in all germplasm lines with successive cuttings except for CA-IX in 3rd...
Enhancing germination of kiwifruit seeds with temperature, medium and gibberellic acid
H. Çelik, H. Zenginbal, M. Özcan
Hort. Sci. (Prague), 2006, 33(1):39-45 | DOI: 10.17221/3738-HORTSCI
Germination responses to temperature, medium and gibberellic acid (GA3) treatments were studied in kiwifruit (Actinidia deliciosaChev. cv. Hayward) seeds. The seeds treated with four GA3concentrations (0, 2,000, 4,000 and 6,000 ppm) were sown in trays with peat moss, perlite + heater humus and soil mixture and subjected to the temperatures of 20°C, 25°C, 30°C and 35°C with bottom heating, under controlled conditions. All the treatments significantly affected the kiwifruit seeds germination. Seeds sown in peat moss and subjected to the temperature of 35°C with bottom heating reached the maximum germination percentage (99.17%). Peat moss and...