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  • Electronic Resource  (5)
  • Inorganic Chemistry  (2)
  • Symbiosis  (2)
  • Actinorhizal capsule  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Cellulose and xylans in the interface capsule in symbiotic cells of actinorhizae (1990)
    Springer
    Protoplasma 159 (1990), S. 35-43 
    Details
    ISSN: 1615-6102
    Keywords: Actinorhizal capsule ; Cellulose ; Enzyme-gold cytochemistry ; Frankia ; Plant cell wall ; Xylans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Enzyme-gold affinity labeling was used to show that in mature infected cells of actinorhizal symbioses the capsule on the plant host side of the symbiotic interface contained cellulose and xylans. Host species examined for cellulose wereAlnus rubra, Casuarina equisetifolia, C. glauca, Ceanothus cuneata, C. velutinus, Elaeagnus pungens, andMyrica cerifera.. Cellulose was in the capsule throughout the infected cell, implying that during development cellulose synthase was present in the host cell membrane component of the symbiotic interface. Any possible degradation of capsule cellulose by the microsymbiont was either incomplete or transient, because the polymer was present in mature infected cells. Cellulose labeling inCeanothus andElaeagnus was less consistent than in the other species. Dual labeled capsules inCasuarina glauca andAlnus rubra showed a similar distribution of xylans and cellulose. Cytochemical studies indicate that the capsule contains three major classes of cell wall polysaccharides: cellulose, hemicellulose (xylans), and pectins (shown previously). This suggests that the capsule is essentially a thin, internal, tubular plant cell wall.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326633
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  • 2
    Electronic Resource
    Electronic Resource
    Endophyte differentiation inCasuarina actinorhizae (1987)
    Springer
    Protoplasma 136 (1987), S. 104-117 
    Details
    ISSN: 1615-6102
    Keywords: Actinomycete ; Casuarina ; Development ; Frankia ; Root ; nodules ; Symbiosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary This is an ultrastructural study of development of infected cells in nitrogen fixing root nodules ofCasuarina spp. While several aspects of development are similar to those found in many other actinorhizae, unusual aspects of development of the host cell and differentiation of the endophyte inCasuarina are correlated with unusual changes in the wall of the infected cell. Instead of vesicles the endophyte forms atypical hyphae in mature infected cells. These unusual hyphal forms are termed intracellular hyphae. Intracellular hyphae are nonseptate hyphae which originate and terminate within the same host cell, and have a varying diameter and a multidirectional growth and branching pattern. A laminate surface layer previously undescribed on hyphae ofFrankia is a feature common to mostCasuarina endophytic hyphae and is probably similar chemically to the laminae comprising the multilamellate envelope of endophytic vesicles in other actinorhizae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01276359
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  • 3
    Electronic Resource
    Electronic Resource
    Symbiotic vesicle ultrastructure in high pressure-frozen, freeze-substituted actinorhizae (1994)
    Springer
    Protoplasma 183 (1994), S. 37-48 
    Details
    ISSN: 1615-6102
    Keywords: Actinomycete ; Frankia ; Procaryote cell wall ; Symbiosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Using tissue stained en bloc with chromic acid or tissue prepared by high pressure-freezing and freeze-substitution, it was possible to analyze quantitatively the ultrastructure of symbiotic vesicle envelopes (SVE) inAlnus serrulata, Ceanothus americanus, Elaeagnus umbellata, andMyrica cerifera. The lamina measured about 4.7 nm in thickness in thin section. Despite diverse symbiotic vesicle morphology, the SVE thickness was similar in all of these symbioses: 36–71 nm, which corresponded to 6–15 laminae based on counts of chromic acid-stained SVEs. This similarity in structure suggests that a similar environmental signal regulates envelope thickness in the different root nodules. Based on previous studies, this is likely to be pO2. Three types of envelope morphologies were distinguished: (1) theAlnus-type (as inAlnus andElaeagnus), which had localized thickenings around the vesicle and had thickest dimensions over the stalk; (2) theCeanothus-type. characterized as a relatively uniform envelope over both vesicle and attached hypha, and (3) theMyrica-type, which had no stalk region and a basal SVE thickness of about six laminae throughout except where localized thickening occurred. Localized thickening of the SVE resulted from extra numbers of laminae being deposited, generally over regions where septa contacted the edge of the vesicle. Freeze-substituted symbiotic vesicles had a variety of novel structures that are poorly preserved in chemically-fixed tissue. A paracrystalline body inAlnus symbiotic vesicles may be composed of particles that also exist free in the symbiotic vesicle cytoplasm. In addition, a previously unknown complex at the base of theAlnus-type symbiotic vesicle and within its stalk was evident in freeze-substituted tissues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01276811
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  • 4
    Electronic Resource
    Electronic Resource
    Selenige Säure als neues spezifisches Reagens zur Bestimmung und Trennung für Wismut und Titan (1930)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 189 (1930), S. 101-112 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Es wird die Eignung der selenigen Säure für analytische Zwecke gezeigt und.
    Additional Material: 12 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19301890110
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  • 5
    Electronic Resource
    Electronic Resource
    On [Na(POCl3)4]+ Complex Ion Formation: Conductivity, Raman, and NMR studies in the system phosphoryl chloride-sodium tetrachloro aluminate and related compounds (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 573 (1989), S. 170-184 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Über die Bildung von [Na(POCl3)4]+-Komplexionen. Leitfähigkeits-, Raman- und NMR-Untersuchungen im System Phosphorylchlorid-Natriumtetrachloroaluminat bzw. analoger VerbindungenLeitfähigkeiten, Raman- sowie 27Al-, 23Na- und 31P-NMR-Spektren des Systems POCl3-NaAlCl4 wurden in Abhängigkeit vom Molenbruch x(NaAlCl4) im lösungsmittelreichen Gebiet gemessen. Zusätzlich erfolgte die Registrierung der Raman-Spektren der Lösungen von NaFeCl4, LiAlCl4, LiFeCl4 und KAlCl4 in POCl3. In den Li+- bzw. Na+-Ionen enthaltenden Proben konnte unter bestimmten Bedingungen ein von Temperatur und Salzkonzentration abhängiger Phasenübergang von der flüssigen in die feste Phase beobachtet werden. Deutliche Veränderungen in den Ramanspektren der Elektrolytlösungen im Vergleich zum reinen Lösungsmittel POCl3 belegen die Existenz von intermolekularen Wechselwirkungen, durch die das POCl3-Molekül beeinflußt wird. Die Annahme der Bildung von [M(POCl3)4]+-Solvaten (M = Li, Na) aufgrund der Ramanergebnisse wird durch die Resultate der NMR-Spektroskopie unterstützt.
    Notes: The system POCl3-NaAlCl4 was investigated by measuring the conductivity and the Raman and NMR spectra (27Al, 23Na and 31P) as a function of the mol fraction x of NaAlCl4 in POCl3. Additionally, Raman spectra of POCl3 solutions of NaFeCl4, LiAlCl4, LiFeCl4, and KAlCl4 were recorded. In solutions containing Li+ or Na+ ions a liquid to solid (or jelly) phase transition was observed under certain conditions, dependent on salt concentration and temperature. Observed changes in the Raman spectra of the electrolyte solutions in comparison to the pure solvent POCl3 demonstrate the existence of interactions. Clearly, the POCl3 eigenfrequencies and hence the molecules are pertubed. The formation of [M(POCl3)4]+ complexes (M = Li, Na) can be deduced from the Raman measurements. NMR investigations support this conclusion. For assigning of Raman spectra, (Li+, K+) cation and ([FeCl4]-, [SbCl6]-) anion substitutions were employed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895730117
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