Template-Type: ReDIF-Article 1.0
Author-Name: J. Goliáš
Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice, Czech Republic
Author-Name: L. Bejček
Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice, Czech Republic
Author-Name: P. Grätz
Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice, Czech Republic
Author-Name: S. Klusáček
Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice, Czech Republic
Title: Mechanical resonance method for evaluation of peach fruit firmness
Abstract: An investigation was carried out to establish the basic relationship between mechanical resonance, firmness, chemical composition and ethylene production during the maturity time and the ripening time of peach fruit. The stiffness factor calculated by a non-destructive frequency response technique was compared with biological properties obtained by measurement of chemical composition, firmness and ethylene production in the internal atmosphere of tested fruit. The correlation between the biological multifunction and the mechanical resonance frequency of peach fruit can be expressed by an exponential relationship. Multifactorial index seems to describe the rupture point that for peach fruit coincides with the beginning of climacteric developmental stage, detected by ethylene production.
Keywords: peach fruit, Prunus persica Borh., firmness, mechanical resonance, stiffness factor, ethylene, indices of ripening
Journal: Horticultural Science
Pages: 1-6
Volume: 30
Issue: 1
Year: 2003
DOI: 10.17221/3810-HORTSCI
File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/3810-HORTSCI.html
File-Format: text/html
X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200301-0001.txt
Handle: RePEc:caa:jnlhor:v:30:y:2003:i:1:id:3810-HORTSCI

Template-Type: ReDIF-Article 1.0
Author-Name: Š. Špinarová
Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice, Czech Republic
Author-Name: K. Petříková
Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Faculty of Horticulture, Lednice, Czech Republic
Title: Variability of the content and quality of some active substances within Achillea millefolium complex
Abstract: The present paper compares the production of active substances in different subspecies of Achillea millefolium complex growing in the Czech Republic. Representatives of 7 subspecies of A. millefolium complex (A. setacea Waldst. et Kit., A. asplenifolia Vent., A. pratensis Saukel et Langer, A. collina Rchb., A. styriaca Saukel et Langer subsp. bohemica, A. millefolium subsp. millefolium, A. pannonica Scheele) and several natural hybrids of Achillea L. were collected from 75 natural habitats in different parts of the Czech Republic. Plants were cultivated to investigate plant growth and contents of some effective compounds during 1997-1999. Development of plants was divided into 7 typical phenological phases. From the point of view of active substance production, the stage of early flowering was found as the most suitable phase for Achillea (yarrow) harvest. Air-dried powdered flowering heads were analysed for essential oil, tannin and flavonoid content. The essential oil content was obtained by hydro-distillation; the composition of essential oil was analysed by means of gas-liquid chromatography. The total essential oil content of the examined yarrow species ranged between 0.05% and 0.88% of dry matter; ecotypes of A. collina and some of its hybrids showed the best results with the highest content of deep blue essential oil. Content of tannins was determined according to PhBs IV; flavonoids were expressed as an apigenin content by an internal method of pharmaceutical company IVAX ČR, a. s., Opava. The total flavonoid content was in the range of 1.37-3.97%; the content of tannins ranged from 0.02 to 0.64%. The highest content of flavonoids was determined in the sample of A. styriaca subsp. bohemica (3.97%); the highest content of tannins was found in an A. asplenifolia sample (0.64%).
Keywords: A. millefolium complex, A. setacea, A. asplenifolia, A. pratensis, A. collina, A. styriaca subsp. bohemica, A. millefolium subsp. millefolium, A. pannonica, essential oil, hydro-distillation, chamazulene, tannins, flavonoids
Journal: Horticultural Science
Pages: 7-13
Volume: 30
Issue: 1
Year: 2003
DOI: 10.17221/3811-HORTSCI
File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/3811-HORTSCI.html
File-Format: text/html
X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-200301-0002.txt
Handle: RePEc:caa:jnlhor:v:30:y:2003:i:1:id:3811-HORTSCI

Template-Type: ReDIF-Article 1.0
Author-Name: E. Křístková
Author-Workplace-Name: Research Institute of Crop Production, Praha-Ruzyně, Division of Genetics and Plant Breeding, Department of Gene Bank, Workplace Olomouc, Olomouc-Holice, Czech Republic
Author-Name: A. Lebeda
Author-Workplace-Name: Research Institute of Crop Production, Praha-Ruzyně, Division of Genetics and Plant Breeding, Department of Gene Bank, Workplace Olomouc, Olomouc-Holice, Czech Republic
Author-Name: V. Vinter
Author-Workplace-Name: Research Institute of Crop Production, Praha-Ruzyně, Division of Genetics and Plant Breeding, Department of Gene Bank, Workplace Olomouc, Olomouc-Holice, Czech Republic
Author-Name: O. Blahoušek
Author-Workplace-Name: Research Institute of Crop Production, Praha-Ruzyně, Division of Genetics and Plant Breeding, Department of Gene Bank, Workplace Olomouc, Olomouc-Holice, Czech Republic
Title: Genetic resources of the genus Cucumis and their morphological description (English-Czech version)
Abstract: Czech collections of Cucumis spp. genetic resources includes 895 accessions ofcultivated C. sativus and C. melo species and 89 accessions of wild species. Knowledge of their morphological and biological features and a correct taxonomical ranging serve a base for successful use of germplasm in modern breeding. List of morphological descriptors consists of 65 descriptors and 20 of them are elucidated by figures. It provides a tool for Cucumis species determination and characterization and for a discrimination of an infraspecific variation. Obtained data can be used for description of genetic resources and also for research purposes.
Keywords: Cucurbitaceae, cucumber, melon, germplasm, data, descriptors, infraspecific variation, Cucumis spp., wild Cucumis species
Journal: Horticultural Science
Pages: 14-42
Volume: 30
Issue: 1
Year: 2003
DOI: 10.17221/3812-HORTSCI
File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/3812-HORTSCI.html
File-Format: text/html
Handle: RePEc:caa:jnlhor:v:30:y:2003:i:1:id:3812-HORTSCI