Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    The use of bacterial alginates to prepare biocontrol formulations (1990)
    Springer
    Journal of industrial microbiology and biotechnology 6 (1990), S. 129-134 
    Details
    ISSN: 1476-5535
    Keywords: Bacterial alginate ; Biological control ; Plant pathogen ; Kelp alginate ; Biocontrol formulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Formulations which are economical and which can deliver a viable organism are critical to developing successful biocontrol products for plant pathogens. In the present study, alginates derived from commercial kelp and produced byAzotobacter vinelandii isolates ATCC 9104 and 12 837 were compared in their ability to form stable, biodegradable granular formulations of the biocontrol fungiTalaromyces flavus andGliocladium virens. Bacteria were grown in shake flask cultures (180 rpm) at 32°C for 104 h. The cultures were monitored for pH, dissolved oxygen, glucose concentration, dry cell weight, and alginate dry weight. Aqueous solutions of the bacterial alginates, as well as the kelp-derived alginate products, gelled readily in 0.25 M calcium chloride. Mannuronate (M) and guluronate (G) compositions of the alginate samples were determined by circular dichroism. M/G ratios for cultures of isolate 12837 averaged 0.98±0.18; for isolate 9104, 1.59±0.12; and for kelp, 1.54±0.39. The viability ofT. flavus in the kelp and bacterial alginate formulations were similar over 84 days. An exploratory experiment indicated good viability ofG. virens using the same bacterial alginates. This study demonstrated a practical use for bacterial alginate as a potentially less costly substitute for kelp alginate in the preparation of biocontrol agent formulations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01576432
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Seed-germination inhibition by volatile alcohols and other compounds associated withAmaranthus palmeri residues (1988)
    Springer
    Journal of chemical ecology 14 (1988), S. 1633-1648 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; volatile allelochemicals ; alcohols ; aldehydes ; germination inhibitors ; onion ; Allium cepa ; carrots ; Daucus carota ; Palmer amaranth ; Amaranthus palmeri ; tomato ; Lycopersicon esculentum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Effects of 3-pentanone and eight low molecular weight aliphatic alcohols and aldehydes identifed in the mixtures of volatiles released byAmaranthus palmeri S. Wats. (AMAPA) residues were determined on germination of onion, carrot, AMAPA, and tomato seeds. Three-day exposures to these volatiles significantly inhibited germination of these assay seeds, and the inhibition was dependent upon exposure time and concentration. Based on the degree of inhibition observed in both time- and concentration-dependent assays, the following activity series was obtained: 2-heptanol 〉 3-methyl-1-butanol, 1-hexanol 〉 hexanal, 1-pentanol, 3-pentanone, acetaldehyde 〉 ethanol, 2-methyl-1-propanol. The activities of this group of compounds with that of 2-heptanone appear to be additive and related to test compound volatility and hydrophilicity. 2-Heptanol and 2-heptanone also significantly inhibited the germination of other species, including shepherdspurse, soybean, lettuce, alfalfa, common purslane, oats, and lovegrass.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012528
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Volatile seed germination inhibitors from plant residues (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 645-666 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; allelochemicals ; Allium cepa ; Daucus carota ; Lycopersicon esculentum ; volatiles ; cover crops ; conservation tillage ; cotton ; hydrocarbons ; alcohols ; ketones ; aldehydes ; furans ; esters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Volatile emissions from residues of the winter cover legumes, Berseem clover (Trifolium alexandrinum L.), hairy vetch [Vicia hirsuta (L.) S.F. Gray], and crimson clover (Trifolium incarnatum L.), inhibited germination and seedling development of onion, carrot, and tomato. Using GC-MS, 31 C2-C10 hydrocarbons, alcohols, aldehydes, ketones, esters, furans, and monoterpenes were identified in these residue emission mixtures. Mixtures of similar compounds were found in the volatiles released by herbicide-treated aerial and root residues of purple nutsedge (Cyperus rotundus L.) and the late-season woody stems and roots of cotton (Gossypium hirsutum L.). Vapor-phase onion, carrot, and tomato seed germination bioassays were used to determine the time- and concentration-dependent inhibition potential of 33 compounds that were either identified in the plant residue emissions or were structurally similar to identified compounds. Cumulative results of the bioassays showed that (E)-2-hexenal was the most inhibitory volatile tested, followed by nonanal, 3-methylbutanal, and ethyl 2-methylbutyrate. All the volatile mixtures examined contained at least one compound that greatly inhibited seed germination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01016477
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...