Plant, Soil and Environment, 2004 (vol. 50), issue 9
Saccharides of yacon [Smallanthus sonchifolius (Poepp. et Endl.) H. Robinson] tubers and rhizomes and factors affecting their content
J. Lachman, B. Havrland, E.C. Fernández, J. Dudjak
Plant Soil Environ., 2004, 50(9):383-390 | DOI: 10.17221/4048-PSE 
Yacon [Smallanthus sonchifolius (Poepp. et Endl.) H. Robinson], a native plant of the Andes, belongs to the family Compositae (Asteraceae). It represents a traditional crop from the original population of Peru. Most of the tuberous root biomass is constituted by water (> 70% of the fresh weight). Saccharides, especially oligofructans, form 70-80% of their dry weight. Four yacon ecotypes originating from Bolivia, Ecuador, Germany and New Zealand were cultivated on the trial fields of the Czech University of Agriculture in Prague in 1995, 1996, 2000 and 2001. Considerable differences among the ecotypes were observed in their...
Yield and forage quality of red clover (Trifolium pratense L.) cultivars in the lowland and the mountain regions
J. Leto, M. Knežević, K. Bošnjak, D. Maćešić, Z. Štafa, V. Kozumplik
Plant Soil Environ., 2004, 50(9):391-396 | DOI: 10.17221/4049-PSE
Six Trifolium pratense L. cultivars, five diploid and one tetraploid, were grown in the lowland region (123 m altitude) and the mountain region (650 m altitude). Dry matter (d.m.) and green mass (g.m.) yield, stem height and leaf proportion were assessed from each of the three growing seasons. Chemical composition was assessed from the average samples of all cuts in the second year of the experiment. Greater green mass (54.14 t/ha) and dry matter yield (9.86 t/ha), stem height (0.61 m), crude protein (157.6 g/kg), crude fiber (222.9 g/kg), crude ash (100.68 g/kg) and crude fat (30.09 g/kg) content were observed in the mountain region, compared...
Some aspects of the phytotoxic action of fusaric acid on primary Ricinus roots
J. Pavlovkin, I. Mistrík, M. Prokop
Plant Soil Environ., 2004, 50(9):397-401 | DOI: 10.17221/4050-PSE
Fusaric acid, at a concentration of 1mM induced at pH 5.5 an early hyperpolarisation was followed by a marked depolarisation of membrane potential difference. During this time increased electrolyte leakage from the primary Ricinus roots was determined. At higher pH values (6.5 and 8) the depolarisation caused by fusaric acid was immediate without hyperpolarisation observed at pH 5.5. Simultaneous exposure of the roots to P-ATPase activator fusicoccin and fusaric acid (pH 6.5) diminished the hyperpolarising effect of fusicoccin. The present results suggest that the dissociated form of fusaric acid does directly affect particular cell targets...
Stability of four Croatian bread winter wheat (Triticum aestivum L.) cultivars for quality traits
M. Barić, M. Pecina, H. Šarčević, S. Kereša
Plant Soil Environ., 2004, 50(9):402-408 | DOI: 10.17221/4051-PSE
Stability of breadmaking quality of four Croatian bread winter wheat cultivars was investigated using rheological traits from the farinogram (dough development time, stability, degree of softening, water absorption, Hankoczy quality number) and the extensogram (extensibility, maximum resistance, ratio of resistance to extensibility, energy) and the indirect traits (protein content, wet gluten content, Zeleny sedimentation volume, Hagberg falling number). Stability was evaluated for four cultivars grown in 12 environments in different parts of Croatia. Four stability parameters, covering a wide range of statistical approaches, were used to estimate...
Performance and gene effects for wheat yield under inoculation of arbuscular mycorrhiza fungi and Azotobacter chroococcum
R. Singh, R.K. Behl, K.P. Singh, P. Jain, N. Narula
Plant Soil Environ., 2004, 50(9):409-415 | DOI: 10.17221/4052-PSE
The present investigation was conducted to know the impact of bio-inoculants in low input field conditions on the magnitude and direction of gene effects and mean performance of some morphological and productivity traits in three wheat cultivars WH 147 (medium mineral input), WH 533 (drought tolerant), Raj 3077 (drought tolerant) and six generations namely P1, P2, F1, F2, BC1 and BC2 of three crosses i.e. WH 147 × WH 533, WH 533 × Raj 3077 and WH 147 × Raj 3077. The experiment was conducted in randomised block design with three replications and three treatments i.e. control (C, without...
The variability of Venturia inaequalis CKE. races in the Czech republic and the accumulation of resistance genes in apple germplasm
M. Melounová, P. Vejl, P. Sedlák, A. Reznerová, M. Tesařová, J. Blažek, J. Zoufalá
Plant Soil Environ., 2004, 50(9):416-423 | DOI: 10.17221/4053-PSE
The growing of resistant apple varieties against the scab, impacts the Venturia inaequalis CKE. races development that can overcome the resistance. For this reason the main breeders object is to cumulate the different genetic mechanisms of resistance against this disease. Presented in this paper is the first genetic study of monosporic isolates in the Czech Republic. By means of RAPD and UPGMA methods which characterised the variability of 10 monosporic isolates from different localities and apple varieties. The monosporic isolate derived from the resistant genotype (Vf gene) proved a 79% genetic similarity with the isolate...