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  • 1
    Electronic Resource
    Electronic Resource
    Isozyme studies inNicotiana suaveolens, N. glutinosa and their interspecific hybrid: Genetic control of phosphoglucomutase and glutamic-oxaloacetic-transaminase (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 1274-1276 
    Details
    ISSN: 1420-9071
    Keywords: Nicotiana suaveolens ; N. glutinosa ; interspecific hybrid ; glutamic-oxaloacetic-transaminase ; phosphoglucomutase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Two isozyme systems, phosphoglucomutase and glutamic-oxaloacetic-transaminase, have been studied in leaves ofNicotiana suaveolens, N. glutinosa and their interspecific hybrid. By analyzing the different isozyme patterns in the hybrid a model for the genetic control of these systems has been proposed. Phosphoglucomutase appears to be controlled by a single locus and glutamic-oxaloacetic-transaminase behaves as a dimeric isozyme system, being controlled by at least two loci.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01946420
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  • 2
    Electronic Resource
    Electronic Resource
    Somatic embryogenesis in polyembryonic Secale cereale L. (1992)
    Springer
    Plant cell reports 12 (1992), S. 26-28 
    Details
    ISSN: 1432-203X
    Keywords: Gramineae ; Secale cereale ; Somatic embryogenesis ; Polyembryony
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The progeny of polyembryonic Secale cereale L., was used to study the in vitro response of the immature embryos. The formation of embryogenic calli was very high, and this response and its distribution was statistically different to that shown by the normal regenerated plants and the original population. This behaviour seems to be related to a genetic condition which favours the presence of supernumerary embryos, in vivo as well as in vitro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232417
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  • 3
    Electronic Resource
    Electronic Resource
    Genetic control and modifications of peroxidase pattern in two species ofNicotiana and their interspecific hybrid (1982)
    Springer
    Cellular and molecular life sciences 38 (1982), S. 321-322 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The peroxidase patterns ofNicotiana suaveolens, N. glutinosa and their interspecific hybrid have been studied, and their possible genetic control analyzed. Modifications of the isozymatic pattern along the plant have been observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01949368
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  • 4
    Electronic Resource
    Electronic Resource
    A comparative study of somatic embryogenesis in Secale vavilovii (1991)
    Springer
    Plant cell reports 10 (1991), S. 265-268 
    Details
    ISSN: 1432-203X
    Keywords: Gramineae-Secale ; vavilovii-Somatic ; embryogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The ability of immature embryos, inflorescences and leaves of Secale vavilovii to form embryogenic callus was tested on Murashige and Skoog (1962) medium supplemented with different concentrations of 2,4-D. All cultured immature embryos formed calluses. The highest percentage of embryogenic callus production was from 1–2 mm embryos. Young leaves also formed calluses, mainly from the 10–15 mm basal segment, the percentages of embryogenic calluses being higher when cultures were maintained in darkness. Embryogenic calluses were obtained also from all the cultured immature inflorescences, in the three cases, rooted green plants were obtained and grown in soil. Comparison of the responses of the three explants used indicates that immature inflorescence is the most useful explant for obtaining regenerated plants in Secale vavilovii.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232572
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  • 5
    Electronic Resource
    Electronic Resource
    Hot spots of DNA instability revealed through the study of somaclonal variation in rye (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 506-511 
    Details
    ISSN: 1432-2242
    Keywords: Key words Rye ; DNA instability ; Hypervariable sequences ; Somaclonal variation ; RAPD
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  RAPD analysis was performed to assess DNA variation among rye plants regenerated from immature embryos and inflorescences. From the studied plants, 40% showed at least one variation, and the number of mutations per plant was quite high, ranging from 1 up to 12. On some occasions (2.9% of the scored bands) the modified band was observed in only one plant or in several but originated from the same callus (variable band). In other cases (5.25%) the same band varied in several plants obtained from different calli. We call these hypervariable bands and they could vary between plants belonging to different cultivars and/or with different origins, inflorescences or embryos. Thus, they must originate through independent mutational events. We assume that these bands represent hypervariable regions of the rye genome and so detect hot spots of DNA instability. Some of these bands proved to be unique sequences, others were present in a low copy number while the remaining ones were moderately or highly repetitive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050066
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  • 6
    Electronic Resource
    Electronic Resource
    Genetic analysis of a polyembryonic mutant in rye (1994)
    Springer
    Sexual plant reproduction 7 (1994), S. 290-296 
    Details
    ISSN: 1432-2145
    Keywords: Secale cereale ; Polyembryony ; Chromosome mosaics ; Rye ; Genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have obtained one plant regenerated from rye tissue culture which showed a high percentage of polyembryonic seeds in its progeny. The mutation inducing the development of extra embryos is also influencing erroneous cell division, mitosis and meiosis. The genetic analysis indicated that the aptitude for polyembryonic seed formation is a heritable trait controlled by a dominant gene. However, for expression of the phenotype the female parent should have a specific cytoplasm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00227712
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  • 7
    Electronic Resource
    Electronic Resource
    Genetic control of malate dehydrogenase inNicotiana suaveolens andN. glutinosa (1987)
    Springer
    Cellular and molecular life sciences 43 (1987), S. 617-619 
    Details
    ISSN: 1420-9071
    Keywords: Nicotiana suaveolens ; N. glutinosa ; interspecific hybrid ; malate dehydrogenase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The study of malate dehydrogenase patterns in leaves ofNicotiana suaveolens, N. glutinosa and their interspecific hybrid has been carried out, in order to propose a model of its genetic control. Two possible explanations for the genetic control of malate dehydrogenase have been postulated forN. suaveolens, and at least two loci appear to be implicated in the control of this system inN. glutinosa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02126353
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  • 8
    Electronic Resource
    Electronic Resource
    Flight periodicity ofProstephanus truncatus and longevity of attraction to synthetic pheromone (1993)
    Springer
    Entomologia experimentalis et applicata 66 (1993), S. 91-97 
    Details
    ISSN: 1570-7458
    Keywords: Prostephanus truncatus ; larger grain borer ; flight periodicity ; Teretriosoma nigrescens ; pheromone ; Trunc-call 1 ; Trunc-call 2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Double-sided sticky traps were baited with polythene vials containing synthetic components of the aggregation pheromone ofProstephanus truncatus (Horn) and used to investigate the effect of time of day on capture of this insect.P. truncatus exhibited a bimodal pattern of flight activity with a major peak between 18.00 and 21.00 h, and a smaller peak between 07.00 and 09.00 h. The effective life of the pheromone bait was also investigated over 33 days. The highest numbers ofP. truncatus were caught during the first 8 days and the majority of the beetles were caught within 14 days. Catches then showed a steady decline. Captures of the predatory histeridTeretriosoma nigrescens Lewis, were much lower than those ofP. truncatus and showed fluctuations which did not appear related to numbers of its prey. Environmental factors such as rainfall, temperature, wind and trap positioning appeared to influence results, especially when considered over a short time scale.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02381551
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  • 9
    Electronic Resource
    Electronic Resource
    Somatic embryogenesis, plant regeneration and somaclonal variation in barley (1992)
    Springer
    Plant cell, tissue and organ culture 28 (1992), S. 97-101 
    Details
    ISSN: 1573-5044
    Keywords: epigenetic changes ; Hordeum vulgare ; in vitro culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In vitro culture of immature embryo and young leaf tissues was carried out with five cultivars of barley, Hordeum vulgare. Two cultivars (Albacete and Porthos) responded poorly from both types of explants, while the three others (Dissa, Golden Promise and Ingrid) produced a high frequency of embryogenic callus from these explants (25–60%). For ‘Dissa’ and ‘Ingrid’, young leaf explants were slightly better than immature embryo explants for embryogenic callus induction, while immature embryo cultures of ‘Golden Promise’ responded better than young leaf explants. Thus, there appears to be a significant genotype × explant interaction in the initiation of embryogenic callus in barley. Some phenotypic variants were detected among the regenerated plants of ‘Golden Promise’ and ‘Ingrid’, most originating by epigenetic changes. Only in one case was the variant phenotype heritable, probably due to a mutation in the chloroplast DNA. Mitotic alteractions were not detected. Consequently, somaclonal variation did not appear to be a very frequent event in plants regenerated from 1- to 6- month-old cultures of barley.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039921
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  • 10
    Electronic Resource
    Electronic Resource
    Chromosome numbers of Saintpaulia ionantha plantlets regenerated from leaves cultured in vitro with caffeine and colchicine (1981)
    Springer
    Euphytica 30 (1981), S. 847-853 
    Details
    ISSN: 1573-5060
    Keywords: Saintpaulia ionantha ; colchicine ; caffeine ; cytochimeras ; polyploids ; in vitro
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Parts of Saintpaulia ionantha leaves were cultured on a medium supplemented with different concentrations of colchicine or caffeine. The explants were transferred to a control medium without these chemicals after different periods of time. The chromosome number of the regenerated plantlets was counted. In all the experiments, polyploid plantlets were found, but the percentage of them was higher with colchicine. There were no differences in frequency of polyploid plantlets among treatments with the same chemical. In both cases a high percentage of cytochimeric plantlets was observed and possible explanations of their occurrence are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00038814
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