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  • 1
    ISSN: 1432-1890
    Keywords: Key words Acacia nilotica ; Indigenous AM consortium ; Infectivity potential ; Mycorrhizal dependence ; Phosphorus utilization efficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The responses of Acacia nilotica L. var. cupriciformis to phosphorus application and inoculation with the indigenous consortium of arbuscular mycorrhizal (AM) fungi were evaluated in a nursery experiment using soil from a marginal wasteland. A positive growth response to mycorrhizal inoculation was observed at an Olsen-P level of 20 ppm in the presence of the natural population of AM fungi. There was growth stimulation by either inoculation or additional P at the highest soil P of 40 ppm. Colonization was negatively correlated to soil P but P content of both shoot and root were positively correlated. Inoculation with the indigenous AM consortium significantly increased the uptake of P at all levels of applied P. Acacia is moderately dependent upon the AM symbiosis and exhibited a maximal mycorrhizal dependence (MD) of 18.25% at 20 ppm Olsen-P level under the conditions studied. A sharp and considerable reduction in MD and dry matter yield observed at 40 ppm P suggests that the external P requirement for maximal production of biomass was met at approximately 20 ppm Olsen-P.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1890
    Keywords: Key words Arbuscular mycorrhiza ; Capsicum ; Formulations ; Inocula ; Organic matter ; Polianthes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Different types of nursery inocula formulations, namely mixed indigenous cultures and Glomus intraradices Schenck and Smith, were compared with commercially available inoculants of AM fungi in a pot experiment using two horticultural crops, Capsicum and Polianthes. Soil-based inocula and soil beads produced the highest response in both crops. Glomus intraradices resulted in the highest yield in both Polianthes (45% increase in spike length) and Capsicum (112% increase in fruit yield). Among the commercial inocula tested, only Mycorise enhanced spike length (33%) and fruit yield (11%) in the two hosts. Overall AM colonization was higher in Polianthes than in Capsicum. Sheared root inocula of G. intraradices resulted in high colonization (upto 68%) but the yield enhancement was lower than with soil-based formulations. The mixed indigenous culture produced the highest number of spores and propagules and commercial inocula the lowest.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Mycorrhiza 10 (2000), S. 43-48 
    ISSN: 1432-1890
    Keywords: Sand ; Perlite ; Glomus intraradices ; Charcoal ; Coalmarl
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Glomus intraradices was examined in a locally available sand graded by particle size, planted with Zea mays and fertilized with a nutrient solution. Plants in sand with particle sizes of 0.50–0.78 mm had higher root fresh weights, spore production and percent mycorrhizal colonization than with other particle sizes. Production of spores and infectious propagules was enhanced by a nutrient solution without P. Plants were also inoculated with G. intraradices in pots containing clay-brick granules, charcoal, coalmarl, sand or perlite of the optimal particle size (0.50–0.78 mm). Percent root length colonized by G. intraradices and production of infectious propagules were 40–50 % higher for plants grown in clay-brick granules and sand than in the other media.
    Type of Medium: Electronic Resource
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