Horticultural Science, 2010 (vol. 37), issue 3

Variability, heritability and correlations of some factors affecting productivity in peach

D. Milatović, D. Nikolić, D. Đurović

Hort. Sci. (Prague), 2010, 37(3):79-87 | DOI: 10.17221/63/2009-HORTSCI  

Factors affecting productivity in peach, such as flower density, initial and final fruit set by open pollination, and yield per m length of shoot were studied in 40 cultivars during a three-year period. Significant differences among cultivars were found for all studied properties. The coefficients of variability were the lowest for initial fruit set and then for final fruit set and flower density; while they were the highest for yield. The relatively high values of heritability were found for flower density and yield. Significant correlation coefficients were found between initial and final fruit set, flower density and yield, as well as between final...

Drought tolerance in Zn-deficient red cabbage (Brassica oleracea L. var. capitata f. rubra) plants

R. Hajiboland, H. Amirazad

Hort. Sci. (Prague), 2010, 37(3):88-98 | DOI: 10.17221/64/2009-HORTSCI  

Effects of Zn deficiency were studied in red cabbage plants under well-watered or drought conditions. Impairment of growth due to Zn deficiency was higher under drought compared with well-watered conditions. Drought stress caused a drastic decline in Zn content and led to a damage of photosynthetic apparatus in Zn-deficient but not Zn-sufficient leaves. Net assimilation and transpiration rate were strongly reduced under Zn deficiency and drought conditions following reduction of stomatal conductance. Activity of antioxidant enzymes, with the exception of superoxide dismutase, increased under Zn deficiency conditions, while drought enhanced activity...

Effect of phosphorus on celery growth and nutrient uptake under different calcium and magnesium levels in substrate culture

Y. Li, T. Wang, J. Li, Y. Ao

Hort. Sci. (Prague), 2010, 37(3):99-108 | DOI: 10.17221/81/2009-HORTSCI  

A greenhouse pot experiment was performed to study the effect of phosphorus (P) on celery (Apium graveolens L.) growth, quality and nutrient uptake under different calcium (Ca) and magnesium (Mg) levels in substrate culture. Results showed that there were significant interactions between P and the level of Ca and Mg in the growing media. Celery above-ground fresh weight, total dry biomass, leaf area, and P, Ca and Mg concentrations in celery leaves significantly increased from 0 to 124 mg/l P application. The opposite trends were observed for root/shoot ratio, leaf chlorophyll, carotenoids, soluble protein, soluble sugar, vitamin C, and nitrogen...

Effects of climatic factors and air pollution on damage of London plane (Platanus hispanica Mill.)

B. Gregorová, K. Černý, V. Holub, V. Strnadová

Hort. Sci. (Prague), 2010, 37(3):109-117 | DOI: 10.17221/47/2009-HORTSCI  

London plane (Platanus hispanica Mill.) is considered as very tolerant to pollution and other stresses and in the Czech Republic it has been unaffected by important pathogens until now. However, in recent years the health status of London plane has been significantly deteriorating. During an 11-year survey it was found out that development of London plane damage was characterized by important fluctuations. Minimum value of population damage was 3.6% and maximum 97.5%. The health status of London plane was negatively influenced by long-term precipitation totals, higher total precipitation in May, low average air temperatures in January and...

Incidence of Prune dwarf virus and Prunus necrotic ring spot virus in orchards of sweet and sour cherry in the Czech Republic: Short communication

J. Suchá, L. Svobodová

Hort. Sci. (Prague), 2010, 37(3):118-120 | DOI: 10.17221/74/2009-HORTSCI  

During 2006-2008 field surveys were carried out in the important cherry growing areas of the Czech Republic to assess the incidence of Prune dwarf virus and Prunus necrotic ring spot virus in commercial orchards and nurseries. A total of 1,438 samples from 1,198 sweet cherry trees and from 240 sour cherry trees were tested by ELISA for the presence of Prune dwarf virus and Prunus necrotic ring spot virus. The overall average infection level was 17.7%. The most infected species were sour cherry trees (22.5%). The most frequently detected virus was Prune dwarf virus (10.9%). Prunus necrotic ring spot virus...