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  • 11
    Electronic Resource
    Electronic Resource
    The BEG Expert System – a multimedia identification system for arbuscular mycorrhizal fungi (1996)
    Springer
    Mycorrhiza 6 (1996), S. 275-278 
    Details
    ISSN: 1432-1890
    Keywords: Key words Arbuscular mycorrhiza ; Glomales ; BEG ; Expert System ; CD-ROM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Knowledge of the biodiversity of arbuscular mycorrhizal fungi is limited and keys for their identification are not in a user-friendly format for the non-expert. An Expert System, linked to the BEG (La Banque Européenne des Glomales), has been developed on a CD-ROM to produce a multimedia identification system for these fungi.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005720050137
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  • 12
    Electronic Resource
    Electronic Resource
    A comparison of the development and metabolic activity of mycorrhizas formed by arbuscular mycorrhizal fungi from different genera on two tropical forage legumes (1998)
    Springer
    Mycorrhiza 8 (1998), S. 149-157 
    Details
    ISSN: 1432-1890
    Keywords: Key words Alkaline phosphatase ; Mycelium ; Acaulospora ; Gigaspora ; Glomus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Two glasshouse experiments were done to assess the development and metabolic activity of mycorrhizas formed by isolates of arbuscular mycorrhizal fungi (AMF) from three different genera, Acaulospora, Gigaspora and Glomus on either Pueraria phaseoloides L. or Desmodium ovalifolium L. plants. The second of the two experiments included three levels of a localised phosphate source in the pots. Alkaline phosphatase (ALP), stained histochemically in the intra-radical mycelium (IRM) of AMF over sequential harvests, did not provide a direct marker for the efficiency of AMF in mobilising phosphorus (P) for plant growth and development. The ability of the extra-radical mycelium (ERM) to scavenge a localised phosphate source, determined by its extraction from buried 35-μm mesh pouches, was dependent on the species of AMF tested. This work indicates that AMF from different genera have unique patterns of mycelial development when forming mycorrhizas with tropical hosts in the presence of a localised phosphate source. AMF also appear to have different mechanisms for the control of P transfer, within the mycelium, to the host. The significance of the architecture of the ERM is discussed as well as the localisation of ALP in the IRM in determining the efficiency of AMF in terms of P accumulation in planta and subsequent growth of plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005720050228
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  • 13
    Electronic Resource
    Electronic Resource
    Effect of fungicides on three vesicular-arbuscular mycorrhizal fungi associated with winter wheat (Triticum aestivum L.) (1989)
    Springer
    Biology and fertility of soils 7 (1989), S. 120-128 
    Details
    ISSN: 1432-0789
    Keywords: Vesicular-arbuscular mycorrhiza ; Fungicides ; Glomus spp. ; Spore germination ; Root infection ; Carbendazim ; Tridemorph ; Propiconazole ; Triticum aestivum L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary We studied the effects of field application rates of three fungicides on spore germination and root infection in three species of Glomus. Bavistin (carbendazim) prevented germination of spores of G. monosporum and G. mosseae whereas Calixin (tridemorph) had no effect. Tilt Turbo (propiconazole) inhibited spore germination less than Bavistin. Spores of G. geosporum germinated in the presence of all three fungicides. Foliar applications of Bavistin alone and in a triple-spray programme significantly reduced infection of all three Glomus species in wheat roots grown in conditions of low P availability (2 mg P 1−1). Two fungicides with triazole derivatives, Sportak and Tilt Turbo, also decreased infection and the former significantly reduced spore production of all three Glomus species. Calixin-treated plants, however, showed increased infection levels, resulting in greater yields and greater foliar-P concentrations than control plants. Milgo (ethirimol) was not detrimental to the vesicular-arbuscular mycorrhizal (VAM) symbiosis when applied as a foliar spray.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00292569
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  • 14
    Electronic Resource
    Electronic Resource
    Effects of herbicides on three vesicular-arbuscular fungi associated with winter wheat (Riticum aestivum L.) (1989)
    Springer
    Biology and fertility of soils 7 (1989), S. 113-119 
    Details
    ISSN: 1432-0789
    Keywords: Vesicular-arbuscular mycorrhiza ; Herbicides ; Wheat ; Glomus spp. ; Spore germination ; Root infection ; Triticum aestivum L. ; Bifenox ; Mecoprop ; Difenzoquat methyl sulphate ; Chlortoluron
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary We studied the effects of field application rates of four herbicides (Avenge, Ceridor, Dicurane, and Harrier) on spore germination and infection of wheat roots by three species of Glomus grown under conditions of low P availability. Low concentrations of Ceridor (bifenox, mecoprop) and Harrier (mecoprop, ioxynil, clopyralid) inhibited spore germination while higher concentrations were stimulatory. Avenge (difenzoquat methyl sulphate) prevented spore germination completely, while Dicurane (chlortoluron) had no effect. The herbicide applications had no significant effect on the infection rates of any of the three fungi except Harrier on G. geosporum. The herbicide treatments did, however, affect plant growth and ear yields. Ceridor and Harrier increased ear yields, while Dicurane showed marked phytotoxic effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00292568
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  • 15
    Electronic Resource
    Electronic Resource
    Reply to comments of Truhlar and Chesnavich–Bowers (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 2169-2170 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448358
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  • 16
    Electronic Resource
    Electronic Resource
    Thyroid Gland and Temperature Tolerance Relationships in Cold-blooded Vertebrates (1963)
    [s.l.] : Nature Publishing Group
    Nature 199 (1963), S. 299-299 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As a preliminary to further work on these aspects of thyroid physiology, and in an attempt to confirm and extend the work of Fortune, one of us (J. M. D.) set out to repeat the work on minnows already described. Fish were obtained from Lake Windermere in September and October and a series of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/199299a0
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  • 17
    Electronic Resource
    Electronic Resource
    Endocrinology of Reproduction in the River Lamprey (1963)
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 715-716 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The experimental animals were obtained from the River Severn and kept in well-aerated running tap-water. Hypophysectomy was carried out as previously described2 on a large number of individually marked lampreys, biopsy specimens of gonad from both hypophysectomized and sham-operated control animals ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/197715a0
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  • 18
    Electronic Resource
    Electronic Resource
    Force-Feeding Fish under Experimental Conditions (1959)
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 1660-1661 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It is not known whether hypophysectomized fish would accept squid muscle, or whether such a diet would give an acceptable survival time, since squid is not usually available in this Laboratory. But even if it was found to be satisfactory from these points of view, the difficulty still remains that ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1841660a0
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  • 19
    Electronic Resource
    Electronic Resource
    Assay of Thyroid-stimulating Hormone, Thyroid and Thyroid-like Substances on Xenopus Tadpoles (1953)
    [s.l.] : Nature Publishing Group
    Nature 172 (1953), S. 121-122 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Onset and progress of metamorphosis depend upon the amount of active iodine ingested by the larva in its food. Different foods vary widely in their content of active iodine; for example, eight batches of commercial liver powder produce emergence of front limb in similar batches of larvae in times ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/172121a0
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  • 20
    Electronic Resource
    Electronic Resource
    A Neurohypophyseal Principle in the Elasmobranch Pituitary (1960)
    [s.l.] : Nature Publishing Group
    Nature 185 (1960), S. 850-851 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Pituitary glands were removed from freshly killed Squalus acanthias, Scyliorhinus caniculus, Raia clavata, R. batis and R. naevus, separated into their constituent lobes, and dried in acetone. The resulting powders were extracted with 0-25 per cent acetic acid by the standard method for ox ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/185850a0
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