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  • Mitochondria  (1)
  • nodulation  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Plant and soil 176 (1995), S. 161-169 
    ISSN: 1573-5036
    Schlagwort(e): Casuarina cunninghamiana ; Frankia ; nitrogen fixation ; nodulation ; phosphorus
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract A study was conducted to investigate the effects of phosphorus on nodule formation and function in the Casuarina-Frankia symbiosis. The effects of P on growth and survival of Frankia in the rhizosphere was assessed by examing Frankia growth and survival in flasks of basal nutrient solution. There was no growth in the nutrient solution during the experimental period. However, the viability of Frankia in the nutrient solution without P supply was half that of the initial level, whereas, with P supply, there was only a minor decline during the first week. In a growth pouch experiment, supplying P increased plant and nodule growth, irrespective of P status of the inoculant Frankia culture. There were no effects of P status on any growth or nodulation parameters measured when the inoculants had been standardized on the basis of viability. In a split root experiment, Frankia inoculation and application of P together or separately did not cause any significant difference. This suggests that growth and nodulation respond only to total P supply. Increasing P from 0.1 to 10 μM significantly increased plant growth but not N concentrations. Both nitrogen-fixation and nitrate supported growth were strongly increased as P increased from 0.1 to 1.0 μM. This study indicates that P deficiency limits the growth of host plants more severely than nitrogen fixation processes and P deficiency on nodulation and symbiotic nitrogen fixation in Casuarina cunninghamiana operated indirectly via reducing host plant growth.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    New York, NY : Wiley-Blackwell
    Journal of Electron Microscopy Technique 7 (1987), S. 127-130 
    ISSN: 0741-0581
    Schlagwort(e): Mitochondria ; Life and Medical Sciences ; Cell & Developmental Biology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Allgemeine Naturwissenschaft
    Notizen: In the present report, quantitative electron microscopy is applied to the basic theory of traditional Chinese medicine (TCM). The theory of TCM indicates that pi (spleen in TCM) has important roles in human health. One such function of the pi is nourishing the muscles, and our work examines the ultrastructural basis of the pi actins in this role. The number of mitochondria of skeletal muscle per area was measured and analyzed. The results indicate a significant decrease in the number of mitochondria with normal structure and a significant increase in the number of mitochondria with abnormal structure in piqixuzheng (spleen energy deficiency in TCM) rats. Such changes are thought to reduce the energy supply of the muscles. After treatment with sijunzitang (herbs which invigorate functioning of the pi), the data do not show a significant difference when compared with normal rats. It is considered that the energy metabolism of the cells is one of the functions of pi.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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