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  • Nodulation  (7)
  • Maize
  • pheromone
  • Springer  (17)
  • Annual Reviews
  • National Academy of Sciences
  • Springer Science + Business Media
  • 1980-1984  (17)
  • 1981  (7)
  • 1980  (10)
Collection
Keywords
Publisher
  • Springer  (17)
  • Annual Reviews
  • National Academy of Sciences
  • Springer Science + Business Media
Years
  • 1980-1984  (17)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Pheromonal attraction and allomonal interruption ofIps pini in California by the two enantiomers of ipsdienol (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 703-717 
    Details
    ISSN: 1573-1561
    Keywords: Scolytidae ; bark beetle ; Ips pini ; pheromone ; ipsdienol ; enantiomer ; interruption ; allomone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Air containing volatile compounds from around maleIps pini boring in ponderosa pine logs from California was condensed, fractionated by GC, and assayed in the laboratory and field. The only fraction that showed consistent activity in laboratory assays contained a single compound identified as ipsdienol (2-methyl-6-methylene-2,7-octadien-4-ol). Synthetic racemic ipsdienol showed no activity in either the laboratory or field. However, (−)-ipsdienol, the naturally occurring enantiomer, was attractive toI. pini in the laboratory and field, whereas (+)-ipsdienol interrupted the response ofI. pini to a natural source of attraction in field tests. (−)-Ipsdienol is a major component of the attractant pheromone of this species, since its level of activity in laboratory assays was quantitatively comparable to that of the condensed volatiles, and it was as attractive as maleI. pini boring in ponderosa pine in the field. (+)-Ipsdienol is a component of the pheromone of the competing species,I. paraconfusus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987680
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  • 2
    Electronic Resource
    Electronic Resource
    Cross-inoculation specificity ofPsophocarpus tetragonolobus (L.) DC (1981)
    Springer
    Plant and soil 60 (1981), S. 139-142 
    Details
    ISSN: 1573-5036
    Keywords: Legumes ; Nitrogen fixation ; Nodulation ; Winged beans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Only legumes of the cowpea cross-inoculation group, including the winged bean (Psophocarpus tetragonolobus) were found to form nodules in a temperate zone soil with no previous history of legume cropping. Isolates from root nodules from uninoculated winged beans grown in the field only nodulated legumes in the cowpea cross-inoculation group.Rhizobium japonicum formed ineffective nodules with the winged bean.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02377119
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  • 3
    Electronic Resource
    Electronic Resource
    Callus formation from protoplasts of a maize cell culture (1981)
    Springer
    Theoretical and applied genetics 59 (1981), S. 341-344 
    Details
    ISSN: 1432-2242
    Keywords: Maize ; Cell suspension culture ; Protoplast culture ; Callus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A finely dispersed cell suspension culture from the friable callus of the ‘Black Mexican Sweet’ line of maize was obtained. Protoplasts from this cell culture, when grown in a simplified medium described here, showed sustained cell divisions and gave rise to callus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276446
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  • 4
    Electronic Resource
    Electronic Resource
    Improved legume-rhizobium symbiosis by inoculating preceding cereal crop with rhizobium (1980)
    Springer
    Plant and soil 54 (1980), S. 313-316 
    Details
    ISSN: 1573-5036
    Keywords: Cereal ; Green gram ; Groundnut ; Improved nodulation ; Inoculation ; Legume-Rhizobium symbiosis ; Maize
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In cereal-legume crop rotation system, better Rhizobium symbiosis was obtained by double inoculation,i.e., when the preceeding cereal crop of maize was also inoculated with the same Rhizobium strain, used to inoculate the following legume crop of green gram or groundnut.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181857
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  • 5
    Electronic Resource
    Electronic Resource
    Recycling of organic matter through mulch in relation to chemical and microbiological properties of soil and crop yields (1980)
    Springer
    Plant and soil 56 (1980), S. 273-281 
    Details
    ISSN: 1573-5036
    Keywords: Actinomycetes ; Azotobacter ; Alluvial soil ; Available nitrogen ; Available phosphorus ; Bacteria ; Fungi ; Green gram ; Maize ; Mulching ; Organic matter ; Recyling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Field experiments were conducted to investigate the effect of organic mulching on the nutrient status, microbiological properties and the yield of maize and green gram crops. Soil organic carbon and humin and humus carbon of the fallow and the cropped soils were augmented by mulching. More of nitrogen, available phosphorus and ammoniacal and nitrate nitrogen were found in mulched soils. Soil reaction was not affected by mulching. Mulched treatments maintained more of soil moisture and soil temperature lowered during summer and rainy seasons. Population of bacteria, fungi, actinomycetes and Azotobacter were augmented in mulched treatments at all the stages of sampling. Mulching significantly increased the grain and straw yield of both the crops. The nitrogen uptake by grain was higher in mulched than in the unmulched treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02205856
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  • 6
    Electronic Resource
    Electronic Resource
    Differential response of six cowpea (Vigna unguiculata (L.) Walp) cultivars to liming in an ultisol (1981)
    Springer
    Plant and soil 59 (1981), S. 61-73 
    Details
    ISSN: 1573-5036
    Keywords: Acetylen reduction assay ; Aluminium toxicity ; Chemical composition ; Cowpea ; Cultivar tolerance to soil acidity ; Liming ; Nitrogen deficiency ; Nitrogenase activity ; Nodulation ; Relative dry matter yields ; Soil acidity ; Ultisol ; Lime-induced yield depression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The differential response of six cowpea (Vigna unguiculata (L.) Walp) cultivars to liming was assessed in a greenhouse trial using an Ultisol (Typic Paleudult) from southeastern Nigeria. Lime rates from 0 to 5.0 t/ha were applied to give a range of soil pH, determined in 1∶1 soil/water from 4.25 to about 7.0. Without liming, relative dry matter yields of tops ranged between 46.6 and 76.8 percent. Significant yield responses to the first lime increment (0.5 t/ha) were observed particularly in the less tolerant cultivars and maximum yields were generally obtained with application of 1.6 to 2.5 t/ha lime. Among the six cultivars, TVu 4557 and Ife Brown were most tolerant, Vita-1 and Vita-3 were moderately tolerant, and TVu 1977-OD and TVu 4552 were least tolerant to soil acidity. The latter two cultivars were the most poorly nodulated when grown in the unlimed soil. The first lime increment enabled excellent nodulation to be achieved in all cultivars. Nitrogen analyses on tops confirmed the visual symptoms of nitrogen deficiency in two cultivars (Vita-1, TVu 1977-OD) grown in the unlimed soil. Analysis of data on chemical composition of plant tops and chemical soil characteristics gave indications that aluminium toxicity is the major growth limiting factor for cowpeas in this soil. This study, albeit with a limited range of cowpea germplasm clearly indicates that cowpea possesses considerable potential as a grain legume on strongly acid soils (pH〈5.0), even in circumstances where lime is not available. Low rates of lime (0.5 t/ha or less) will greatly expand the available choice of cultivars.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02183592
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of endomycorrhizal infection on phosphate and cation uptake byTrifolium subterraneum (1981)
    Springer
    Plant and soil 63 (1981), S. 57-64 
    Details
    ISSN: 1573-5036
    Keywords: Cations ; Interaction ; Mycorrhiza ; Nodulation ; Phosphate ; Trifolium subterraneum ; VAM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Conclusions Mycorrhizal fungi increase the rate of phosphate uptake by roots (P inflow) over a range of soil P levels even when mycorrhizal growth increases no longer occur. It is likely that the fungi play a direct part in uptake and translocation of P to the roots. V.A.M. effects on nodulation and N2 fixation are largely indirect, probably resulting from improved P nutrition and growth at low soil P levels. Work on inorganic cation nutrition is much less advanced, but it is already clear that there are interactions between P nutrition and cation uptake which may also be indirect. The pattern of N assimilation (N2 fixation vis-à-vis NaNO3 or (NH4)2SO4 uptake) may modify cation/P interactions. Further work is required to distinguish cause and effect and to clarify the role played by V.A.M. fungi.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374257
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of phosphorus and sulfur nutrition on soluble sugars and growth inClitoria ternatea L. (1980)
    Springer
    Plant and soil 55 (1980), S. 243-250 
    Details
    ISSN: 1573-5036
    Keywords: Nodulation ; Regrowth ; Root reserves ; Symptoms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Effects of P and S on growth and regrowth were assessed in a greenhouse trial in which Clitoria was grown through three cuttings on a deficient soil with a factorial combination of 4 levels of P and 3 levels of S. Phosphorus deficiency caused stunting, flowering delay, and a rusty appearance of leaflets. Sulfur deficiency caused stunting and chlorosis. With successive cuttings, P deficiency became less severe and S deficiency more severe. Nodulation observed at the end of the trial, was influenced more by S than by P. Maximal nodulation was achieved with the highest S level, at any of the highest three P levels. Root and stubble dry weight, and food reserves evaluated by etiolated regrowth and by soluble sugar in roots and stubble, responded positively to both P and S, and correlated with each other and with shoot growth preceding the final cutting. For maximal etiolated regrowth, the S requirement was higher than the P requirement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181804
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  • 9
    Electronic Resource
    Electronic Resource
    Influence of phosphorus and sulfur nutrition on composition ofClitoria ternatea L. (1980)
    Springer
    Plant and soil 55 (1980), S. 251-259 
    Details
    ISSN: 1573-5036
    Keywords: Nodulation ; Nitrate ; N-fertilization ; Plant P, S, N ; Sugar
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A greenhouse experiment on a silt loam surface soil (Typic Hapludult) was done to investigate effects of P and S on yield, quality aspects and sugar reserves in the tropical forage legumeClitoria ternatea L. Four levels of P and two N treatments (NH4NO3 vs symbiotic) were arranged in a factorial design with four replications. After the first cutting two levels of S were imposed on this design. Phosphorus enhanced dry matter yield in the first cutting. Its effect was smaller in the second cutting. Amount of P required to produce maximum plant yield dropped from 200 mg/kg soil (or more) at the first cutting to 50–100 mg/kg at the second. Added S improved growth at suboptimal levels of P. At optimal P and S, symbiotic and +N plants yielded alike. Phosphorus and S fertilization caused several changes in plant composition. Nitrogen concentration was raised by S treatment and lowered by P. Combined addition of P and S lowered plant nitrate content. In symbiotic plants, soluble sugar concentrations were higher than in N-treated plants, and were increased by P and S treatment. In N-treated plants, neither P nor S increased reducing sugar concentration, but they increased total sugar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181805
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  • 10
    Electronic Resource
    Electronic Resource
    Composition of aphid alarm pheromones (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 349-360 
    Details
    ISSN: 1573-1561
    Keywords: Aphid ; pheromone ; alarm pheromone ; farnesenes ; pinenes ; behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Analysis of single cornicle droplets from six species of aphid showed the presence of volatile components in addition to (E)-β-farnesene. Compounds identified included (Z,E)-α- and (E,E)-α-farnesene forMyzus persicae and α- and β-pinene forMegoura viciae. WithMegoura viciae, (−)-α-pinene was most important for alarm activity. The major component of the alarm pheromone ofPhorodon humuli was (E)-β-farnesene even though farnesenes are present in the summer hostHumulus lupulus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01402913
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