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  • Articles: DFG German National Licenses  (13)
  • 1
    Electronic Resource
    Electronic Resource
    Competitive interactions in mixtures of broccoli and Chenopodium album grown at two UV-B radiation levels under glasshouse conditions (2005)
    Oxford, UK : Blackwell Science Ltd
    Weed research 45 (2005), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Ultraviolet-B radiation effects on intra- and interspecific competition in broccoli (Brassica oleracea) and Chenopodium album were studied using bivariate factorial experiments. A randomized block design was used in which three monoculture densities for each species [144 (low), 256 (medium), and 400 (high) plants m−2] and all binary combinations were grown in a glasshouse at two (4 and 7 kJ m−2 day−1) UV-BBE radiation levels for 4 weeks in 1999 and 5 weeks in 2000. Inverse yield–density relationships were more discernible at 4, compared with 7 kJ m−2 day−1 UV-BBE radiation. Substitution rates, indicating the balance of intra- to interspecific competitive effects, declined for broccoli at 7, compared with 4 kJ m−2 day−1 UV-BBE radiation, largely because of reduced interspecific competitive influences. Conversely, substitution rates increased for C. album grown at 7 kJ m−2 day−1 UV-BBE radiation, as a result of both decreased intraspecific and increased interspecific competition. Interspecific competitive effects were influenced more than intraspecific competitive effects by UV-B radiation. Based on relative magnitude of substitution rates, C. album was a stronger competitor than broccoli at 4 kJ m−2 day−1 UV-BBE radiation in both years, and at 7 kJ m−2 day−1 UV-BBE radiation in 1999. In 2000, broccoli was the stronger competitor at 7 kJ m−2 day−1 UV-BBE radiation. Overall, the relative competitiveness of broccoli was enhanced, while that of C. album diminished at 7, compared with 4 kJ m−2 day−1 UV-BBE radiation. These findings indicate that above-ambient UV-B radiation has the potential to alter crop–weed competitive interactions, which could change acceptable weed threshold levels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.2005.00476.x
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  • 2
    Electronic Resource
    Electronic Resource
    Development of seed coat-imposed dormancy during seed maturation in Cynoglossum officinale (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 97 (1996), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The relationship between seed phenolics and appearance of seed coat–imposed dormancy during seed development in Cynoglossum officinale L. was studied. Up to 24 days after anthesis, seeds failed to germinate upon imbibition in Petri dishes at 25°C. At 44 days after anthesis, seeds were fully germinable; removal of seed coats did not improve their germination or O2 uptake. At 72 days after anthesis, mature seeds at the base of the cyme did not germinate unless their coats were removed. Removal of seed coat also stimulated O2 uptake at this harvest date. The methanol-soluble phenolic content of the seeds increased during the early stages of seed development, in both the seed coat and the embryo. As seed development continued, the methanol-soluble phenolic content of the embryo stabilized, but that of the seed coat declined. This decline was associated with an increase in the thioglycolic acid–soluble phenolics, presumably lignins, in the seed coat. These results suggest that polymerization of methanol–soluble phenolics into lignins in the seed coat during later stages of seed development renders the seed coat of C. officinale impermeable to 03, and thus keeps the seed dormant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1996.tb00474.x
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  • 3
    Electronic Resource
    Electronic Resource
    Chromosome 17 markers and von Recklinghausen neurofibromatosis: A genetic linkage study in a British population
    Amsterdam : Elsevier
    Genomics 1 (1987), S. 358-360 
    Details
    ISSN: 0888-7543
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0888-7543(87)90038-3
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  • 4
    Electronic Resource
    Electronic Resource
    DNA and enzyme studies on chorionic villi for use in antenatal diagnosis
    Amsterdam : Elsevier
    Clinica Chimica Acta 140 (1984), S. 39-46 
    Details
    ISSN: 0009-8981
    Keywords: Antenatal diagnosis ; Chorion ; Hunter's syndrome ; Maternal contamination ; lauronale sulfalase
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-8981(84)90149-9
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  • 5
    Electronic Resource
    Electronic Resource
    Paternal origin of new mutations in Von Recklinghausen neurofibromatosis (1990)
    [s.l.] : Nature Publishing Group
    Nature 343 (1990), S. 558-559 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fourteen three-generation families were identified in which a new mutation to NF-1 had occurred in a single individual in the second generation. DNA typing of these families for loci closely linked to NF-1 (results summarized in Table 1 and Fig. 1) showed that in 12 of the 14 cases, it was ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/343558a0
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  • 6
    Electronic Resource
    Electronic Resource
    A case of Miller-Dieker syndrome in a family with neurofibromatosis type I (2000)
    Springer
    Acta neuropathologica 99 (2000), S. 425-427 
    Details
    ISSN: 1432-0533
    Keywords: Key words Miller-Dieker ; Lissencephaly ; Migration ; Neurofibromatosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The Miller-Dieker syndrome (type I lissencephaly) is a neuronal migration disorder which is associated with microdeletions in the short arm of chromosome 17. Neurofibromatosis type I (NF1) is an autosomal dominant condition associated with mutations in the long arm of chromosome 17, and characterised by neurofibromas, café-au-lait spots and axillary freckling. The neonatal period for a female infant born at 39 weeks gestation by emergency Caesarean section was complicated by frequent epileptic seizures as well as hypotonia. A computed tomography scan revealed evidence of lissencephaly, and chromosomal analysis showed a microdeletion on the short arm of chromosome 17 (17p13.3), confirming the diagnosis as Miller-Dieker syndrome. The child died at the age of 4 years and examination of the brain confirmed lissencephaly with a thickened cortex, deficient white matter, and grey matter heteropias. The mother had café-au-lait spots, and axillary freckling. In addition, the mother’s and maternal grandmother’s genetic analysis showed identical mutations in the neurofibromatosis I gene on the long arm of chromosome 17, confirming the diagnosis of NF1. The child did not possess the mutation. This case illustrates a rare neuronal migration disorder appearing in a child from a family with a history of NF1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004010051145
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  • 7
    Electronic Resource
    Electronic Resource
    Gross deletions of the neurofibromatosis type 1 (NF1) gene are predominantly of maternal origin and commonly associated with a learning disability, dysmorphic features and developmental delay (1998)
    Springer
    Human genetics 〈Berlin〉 102 (1998), S. 591-597 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Mutation screening in neurofibromatosis type 1 (NF1) families has long been hampered by the complexity of the NF1 gene. By using a novel multi-track screening strategy, 67 NF1 families (54 two-generation, 13 three-generation) with a de novo mutation in the germline of the first generation were studied with two extragenic and 11 intragenic markers. The pathological lesion was identified in 31 cases. Loss of heterozygosity (LOH) in the affected individual revealed a gross gene deletion in 15 of the two-generation families; in 12 (80%) of them, the deletion was maternally derived. Eleven patients with a gross deletion exhibited developmental delay, ten had dysmorphic features and six manifested a learning disability. No gross deletion was apparent in any of the 13 three-generation families, suggesting that such lesions are subject to more intense selection. In these families, the new mutation was of paternal origin in 11 kindreds and the underlying mutational event could be characterised in three of them.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004390050746
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  • 8
    Electronic Resource
    Electronic Resource
    Evaluation of the protein truncation test and mutation detection in the NF1 gene: mutational analysis of 15 known and 40 unknown mutations (1999)
    Springer
    Human genetics 〈Berlin〉 105 (1999), S. 327-332 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. The neurofibromatosis type 1 (NF1) gene located at 17q 11.2 contains 60 exons and spans 350 kb of genomic DNA. Mutation analysis has been hampered by the large size of the gene, the high rate of new mutations, a lack of mutational clustering and the presence of numerous homologous loci. Mutation detection methods based on the direct analysis of a gene's RNA transcript permit the rapid screening of large multi-exonic genes. However, the detection of frame-shift or nonsense mutations can be limited by instability of the mutant mRNA species due to nonsense-mediated decay. In order to determine the frequency of this allelic exclusion, total lymphocyte RNA was analysed from 15 NF1 patients with known truncating mutations and a panel of 40 NF1 patients with unknown mutations. The level of expression of the mutant message was greatly reduced in 2 of the 15 samples (13%), and 3 of the 18 informative samples from the panel of 40. A coupled reverse-transcription polymerase chain reaction and protein truncation test method was subsequently applied to screen RNA from the panel of 40 unrelated NF1 patients. Aberrant polypeptide bands were identified and characterised in 21 samples (53%). The mutations identified were 479del107;ins31, 495delTGTT, 1127delTGAT, R416X, R440X, 1446del 62, 1541delAG, 2252del 74, 2537insTG, 3456delACTC, R1276X, R1362X, 5749ins171, 6084del280, 6487insA, R2214X, 6791insA, 6858del141, 7458delC, 7676 2A-G and 8081delC. These mutations were uniformly distributed across the gene and 14 represent novel changes that contribute to the germline mutational spectrum of the NF1 gene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004399900135
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  • 9
    Electronic Resource
    Electronic Resource
    Localisation of the gene for Hunter syndrome on the long arm of X chromosome (1986)
    Springer
    Human genetics 〈Berlin〉 74 (1986), S. 391-398 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The localisation of the gene for Hunter syndrome (MPS II) has been studied in 11 families using 12 polymorphic DNA markers, one on the short arm and the remaining 11 located at various points on the long arm of the X chromosome. Lod scores for seven probes were uniformly negative for all values of θ; positive scores at values of θ=0.10 or more were obtained for the five probes located most distally on the long arm (52A, F9C, DX13, St14-1, F8C). Current data suggest the most likely order of the loci to be: 52A, F9C, Hunter, DX13, St14-1, F8C-qter; the Hunter locus may thus be close to that for the fragile site at Xq27.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00280492
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  • 10
    Electronic Resource
    Electronic Resource
    Characterization and significance of nine novel mutations in exon 16 of the neurofibromatosis type 1 (NF1) gene (1997)
    Springer
    Human genetics 〈Berlin〉 99 (1997), S. 674-676 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Nine novel mutations have been characterized as the result of screening exon 16 of the human NF1 gene in 465 unrelated neurofibromatosis type 1 patients. These lesions include three nonsense and two missense mutations, two deletions, one duplication, and one mutation in the 5′ splice site of intron 16. Although exon 16 is the largest NF1 exon, no mutations have so far been reported in this region. This apparent paucity of lesions may be due either to a reduced functional importance of exon 16 or a screening bias or both. However, consideration of the mutability of exon 16 in comparison with other exons suggests that, at least for single base pair substitutions, no such factors need be invoked. Any previous lack of exon 16 mutations in this category would be explicable in terms of a lower propensity to mutate for codons in this gene region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004390050427
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