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  • 1
    Electronic Resource
    Electronic Resource
    Protoplast responses in the epidermis of Allium cepa induced by penetration by Botrytis allii (1988)
    Springer
    Mycopathologia 102 (1988), S. 169-173 
    Details
    ISSN: 1573-0832
    Keywords: Allium cepa ; Botrytis allii ; penetration responses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Penetration of Allium cepa epidermal cells (white, yellow, and red varieties) by Botrytis allii induced a response by host protoplasts in normal tissue which was not observed when penetrations were made in protoplast-free host cell walls. Callose and auto-fluorescing substances (possibly phenolic compounds) were located at the penetration sites only in normal host cells containing protoplasts. Lignin tests were negative. Halos were clearly visible in both types of tissue. Autofluorescence was observed at penetration sites in normal cells of all cultivars but general wall background autofluorescence was not observed in white onions. Autofluorescence was generally yellow green and when treated with ammonium hydroxide became green. Treatment with sodium hydroxide abolished autofluorescence. No attempt was made to isolate the autofluorescing material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00437400
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Degenerative changes in the epidermal cell wall of Allium cepa caused by Botrytis allii: Loss of dry mass, pectin, and cellulose in halos (1988)
    Springer
    Mycopathologia 101 (1988), S. 47-52 
    Details
    ISSN: 1573-0832
    Keywords: Botrytis allii ; Allium cepa ; halo composition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Halos detected using interference microscopy (even- and fringle-field modes with monoand poly-chromatic light) around penetration sites of Botrytis allii in cell walls of normal and protoplast-free outer epidermal tissue of white, yellow, and red onions were alike. Halos in protoplast-free cell walls contained 33% less dry mass than areas of these walls adjacent to halos (quantitative interference miscroscopy with 546 nm light in the even-field mode). Halos were significantly larger in the white onion than in the yellow and red varieties. The loss of cell wall dry mass during the production of halos involved the loss of pectin and cellulose. We infer that this is caused by enzymes released from the pathogen. Cuticle degradation at penetration sites was not observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00455668
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ethylene is involved in the autochemotropism of Phycomyces (1977)
    Springer
    Planta 134 (1977), S. 61-66 
    Details
    ISSN: 1432-2048
    Keywords: Autochemotropism ; Avoidance response ; Ethylene ; Phycomyces
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The sporangiophore of the fungus Phycomyces blakesleeanus has the property of growing away from a barrier which is few mm from the growing zone of the sporangiophore (avoidance or autochemotropic response). A model has been published (Cohen, R.J., Jan, N.Y., Matricon, J., Delbrück, M.: J. Gen. Physiol. 66, 67–95 (1975)). To explain the avoidance response which postulates that the sporangiophore emits and readsorbs a volatile growth-promoting effector (gas X) and that the barrier modifies the effector distribution by acting as an aerodynamic obstacle, causing a higher concentration of gas X on the side of the sporangiophore closer to the barrier. From this model we deduced three properties of the gas X. Of the several gases tested (N2, CO2, CH4, C2H2, C2H4, C2H6) only ethylene (C2H4) had all these three properties, a finding which suggests that it has a role in the avoidance response (autochemotropism).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00390096
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The role of retinol in the initiation of sporangiophores of Phycomyces blakesleeanus (1979)
    Springer
    Planta 146 (1979), S. 257-262 
    Details
    ISSN: 1432-2048
    Keywords: β-Carotene mutants ; Oxygen requirement ; Phycomyces ; Retinol ; Sporangiophore initiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The initiation of sporangiophores of Phycomyces was analyzed under oxygen-limiting conditions. Mutants lacking β-carotene have a higher oxygen threshold than the wild type depending on the residual amount of β-carotene. The supersensitivity to low oxygen tension is specific for sporangiophore initiation and can be suppressed by addition of either retinal, retinol or retinol acetate to the medium. It is suggested that retinol is a natural regulator of differentiation in Phycomyces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387795
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    bli-4, a gene that is rapidly induced by blue light, encodes a novel mitochondrial, short-chain alcohol dehydrogenase-like protein in Neurospora crassa (1996)
    Springer
    Molecular genetics and genomics 252 (1996), S. 223-229 
    Details
    ISSN: 1617-4623
    Keywords: Key words Neurospora crassa ; Blue light ; Mitochondria ; Short-chain alcohol dehydrogenase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Blue light plays an important role in developmental control throughout nature. The bli-4 gene of Neurospora crassa, together with bli-3, al-1 and al-2, is rapidly inducible by blue light. Induction leads to a ninety-fold increase in transcription rate over the dark control level, and the gene therefore appears to be of prime importance in the blue-light induction pathway of N. crassa. We describe the sequencing and analysis of bli-4 and the 38 kDa protein it encodes. We show that the protein is very rapidly imported into the mitochondria and exhibits high homology with the family of short-chain alcohol dehydrogenases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02173767
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    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    bli-4, a gene that is rapidly induced by blue light, encodes a novel mitochondrial, short-chain alcohol dehydrogenase-like protein inNeurospora crassa (1996)
    Springer
    Molecular genetics and genomics 252 (1996), S. 223-229 
    Details
    ISSN: 1617-4623
    Keywords: Neurospora crassa ; Blue light ; Mitochondria ; Short-chain alcohol dehydrogenase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Blue light plays an important role in developmental control throughout nature. Thebli-4 gene ofNeurospora crassa, together withbli-3, al-1 andal-2, is rapidly inducible by blue light. Induction leads to a ninety-fold increase in transcription rate over the dark control level, and the gene therefore appears to be of prime importance in the blue-light induction pathway ofN. crassa. We describe the sequencing and analysis ofbli-4 and the 38 kDa protein it encodes. We show that the protein is very rapidly imported into the mitochondria and exhibits high homology with the family of short-chain alcohol dehydrogenases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02173767
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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