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  • 1
    Electronic Resource
    Electronic Resource
    Development of tolerance to the diphenyl ether herbicide acifluorfen-methyl in excised cucumber (Cucumis sativus L.) cotyledons
    Amsterdam : Elsevier
    Pesticide Biochemistry and Physiology 21 (1984), S. 213-222 
    Details
    ISSN: 0048-3575
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0048-3575(84)90057-9
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Acidity of the Thylakoid Lumen in Plastids Makes Sense from an Evolutionary Perspective (2000)
    Springer
    Photosynthetica 37 (2000), S. 609-614 
    Details
    ISSN: 1573-9058
    Keywords: carbon fixation ; carbon concentrating mechanism ; ATPase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An acid pH in the lumen of chloroplast thylakoids is necessary in order to derive the required amount of CO2 to account for the observed rates of carbon fixation. We point out that the endosymbiotic derivation of the chloroplast from a cyanobacterium would have resulted in the lumen of the thylakoid having an acid pH. The thylakoids of cyanobacteria are continuous with the plasma membrane, resulting in the lumen of the thylakoid being open to the outside of the cell. Endosymbiosis resulted in the cyanobacterium being taken up into a food vacuole of a protozoan. The vacuole would have had an acid pH, probably around pH 5, so the endosymbiotic bacterium would have been surrounded by an environment with an acidic pH. The lumen of the thylakoids would have been at an acid pH since they were open to the exterior of the cell, and to the contents of the vacuole.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007179710277
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Electron microscopic studies on a unique cytokinetic structure in tetrasporocytes of the red algaHarveyella sp. (Cryptonemiales, Choreocolaceae) (1981)
    Springer
    Protoplasma 108 (1981), S. 197-209 
    Details
    ISSN: 1615-6102
    Keywords: Cytokinesis ; Harveyella ; Red alga
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A unique type of cytokinesis is described in tetrasporocytes of the alloparasitic red alga,Harveyella sp. Cytokinesis takes place immediately after four post-meiotic nuclei are formed and may result from coalescence of endoplasmic reticulum cisternae. As a result of this cisternal fusion, a double-membraned cleavage channel is formed. This channel lacks wall material and is usually oriented tetrahedrally. Membranes of the peripheral portions of the cleavage channel fuse with the existing tetrasporocyte plasmalemma, delimiting four tetraspores. Subsequently, wall material is secreted within the preformed cleavage channels to form a continuous tetraspore wall between adjacent tetraspores. Wall secretion usually occurs in a centrifugal direction, beginning at the juncture of the cleavage channels, but it also may be random or centripetal. Dictyosome activity is absent during the first wall secretion stage but contributes to secondary wall deposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02224419
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrastructure, biogenesis, and functions of extrusive organelles in selected non-ciliate protists (1994)
    Springer
    Protoplasma 181 (1994), S. 164-190 
    Details
    ISSN: 1615-6102
    Keywords: Extrusomes ; Protists ; Ejectisomes ; Gun cells ; Polar filaments ; Rhoptries ; K2 bodies ; Spermatial vesicles ; Adhesion vesicles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The ultrastructural features, biogenesis and functions of several selected protist extrusive organelles are discussed. Most of the review focuses on some common extrusive organelles that were not considered by Hausmann and several types which have been described since that review of 16 years ago. For convenience, extrusomes are categorized as projectile or mucocyst extrusomes. The projectile extrusomes are further subdivided into non-penetrating and cell penetrating extrusomes. This review is restricted to projectile extrusomes such as ejectisomes, the microsporidian invasion apparatus, and the gun cell of oomycetes. Mucocysts include the apicomplexan rhoptries, the K2 bodies of oomycetes, and the spermatial vesicles and adhesive vesicles of red algae. The possible phylogenetic importance of some extrusive organelles is briefly considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01666394
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    Paper (German National Licenses)
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