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  • Articles  (16)
  • nodulation  (15)
  • Manganese
  • 1990-1994  (16)
  • 1980-1984
  • 1990  (16)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (16)
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  • Articles  (16)
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Keywords
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  • 1990-1994  (16)
  • 1980-1984
Year
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Seasonal variation of calcium, magnesium, potassium, and manganese contents in xylem sap of beech(Fagus sylvatica L.) in a 35-year-old limestone beech forest stand (1990)
    Springer
    Trees 4 (1990), S. 75-80 
    Details
    ISSN: 1432-2285
    Keywords: Calcium ; Fagus sylvatica ; Magnesium ; Manganese ; Mineral content ; Potassium ; Seasonalvariation ; Xylem sap
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In a 35-year-old calcareous beech forest stand five beech trees (Fagus sylvatica L.) were felled every 2 weeks, and xylem sap was obtained by means of water displacement from the lowest trunk sections, each 100 cm in length. From mid-October 1988 to mid-October 1989 a total of 130 trees were investigated. The seasonal variations of the Ca, Mg, K and Mn contents, as well as those of pH, show four characteristic phases. Additionally, distribution of the mineral contents along the trunk was studied in four trees. The seasonal increase and decrease of xylem sap mineral contents along the trunk is shown for the characteristic phenophases. The Ca, Mg, K, and Mn contents of xylem saps were determined by means of atomicabsorptionspectrophotometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00226069
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of boron and nitrogen fertilization on cowpea nodulation, mineral nutrition and grain yield (1990)
    Springer
    Nutrient cycling in agroecosystems 22 (1990), S. 71-78 
    Details
    ISSN: 1573-0867
    Keywords: Boron ; critical level ; grain ; nitrogen ; nodulation ; nutrition ; toxicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A two year field study on the effect of nitrogen N and boron B fertilization on the nodulation, mineral nutrition and grain yield of cowpea was carried out in the Nigerian savanna where fairly widespread B deficiency has been reported. Treatments consisted of four levels of N (0, 15, 30 and 60 kg/ha in 1986 and 0, 15, 30 and 45 kg/ha in 1987) and three levels of B (0, 1.5 and 3.0 kg/ha). Cowpea responded positively though nonsignificantly to N fertilization up to 30 kg N/ha. However, N had no effect on the N, P, K and B content of index leaves. Boron application consistently reduced grain yield. Like N, applied B had no effect on the N, P, K concentration of index leaves but increased B concentration highly significantly (P 〈 0.001). The critical level of B toxicity in index leaves was approximated to be 21pm under field condition. Application of N and B depressed nodulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01116181
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  • 3
    Electronic Resource
    Electronic Resource
    Studies on the nodulation of strain-specific resistant pea lines using single, mixed and delayed inoculation by Rhizobium leguminosarum (1990)
    Springer
    Plant and soil 121 (1990), S. 235-242 
    Details
    ISSN: 1573-5036
    Keywords: ELISA ; inoculation ; nodulation ; pea ; Pisum sativum L. ; Rhizobium leguminosarum ; strain-specific resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Symbiotic interactions between peas and Rhizobium leguminosarum were investigated by inoculating four pea lines, three of which are strain-specific resistant to the European strain 311d, with various combinations of two strains of Rhizobium, 311d and Tom++. The strains were almost equally good to infect the susceptible European cultivar Hero when added singly inoculated. After mixed inoculation (1:1 proportion) strain analysis by ELISA revealed that the nodules were preferentially formed by 311d, although some Tom++ nodules were also found mainly on the upper part of the root. Our conclusion is that Tom++ is less compatible in comparison with 311d. In addition, we found that as the Hero plants emerged, they were becoming more resistant towards infection with not adapted bacteria. The strain-specific resistant lines from Afghanistan belong to two different systems: Afgh. I, completely resistant to 311d and highly nodulating with Tom++, and Afgh. III, incompletely resistant to 311d and poorly nodulating with Tom++. Mixed inoculations resulted in nodule depressions, as compared to single inoculations with Tom++ ranging from 87% to 14%. The ability of 311d to block infection sites on the roots were found to depend on the degree of symbiotic adaptation between Afgh. I and Tom++, respectively Afgh. III and Tom++. Strain analysis after double strain inoculation of Afgh. I plants revealed that some nodules were induced by strain 311d. Thus, the presence of Tom++ in this case influences the degree of host resistance. However, in Afgh. III plants the resistance towards nodulation were unaffected by the presence of Tom++. We suggest that the degree of symbiotic adaptation may change the barrier of resistance towards infection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00012317
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  • 4
    Electronic Resource
    Electronic Resource
    Assessment of genetic variability for N2 fixation between and within provenances of Leucaena leucocephala and Acacia albida estimated by 15N labelling techniques (1990)
    Springer
    Plant and soil 127 (1990), S. 169-178 
    Details
    ISSN: 1573-5036
    Keywords: Acacia albida ; genetic variability ; Leucaena leucocephala ; 15N methods ; nitrogen fixation ; nodulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Nitrogen fixed in 13 provenances of Acacia albida and 11 isolines of Leucaena leucocephala inoculated with effective Rhizobium strains was measured by 15N techniques and the total N difference method. In the test soil, on the average, L. leucocephala derived about 65% of its total N from atmospheric N2 fixation compared to about 20% by A. albida. Significant differences in the percentage of N derived from atmospheric N2 (% Ndfa) occurred, between provenances or isolines within species. The % Ndfa ranged from 37 to 74% within L. leucocephala and from 6 to 37 within A. albida; (equivalent to 20–50 mg N plant−1 and 4–37 mg N plant−1 for the two species over three months, respectively) and was correlated with the nodule mass (r=0.91). The time course of N2 fixation of three selected provenances (low, intermediate and good fixers) was followed at 12 weekly intervals over a 36 week period. The % Ndfa of all provenances and isolines increased with time; and except for one of the L. leucocephala provenances, % Ndfa was similar within species at the 36 weeks harvest. There was a significant correlation between % Ndfa and the amount of N2 fixed (r=0.96). Significant interactions occurred between provenances and N treatments and often growth of uninoculated but N fertilized plants was less variable than for inoculated unfertilized plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00014423
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  • 5
    Electronic Resource
    Electronic Resource
    Exclusion of inefficient Bradyrhizobium japonicum serogroups by soybean genotypes (1990)
    Springer
    Plant and soil 121 (1990), S. 99-105 
    Details
    ISSN: 1573-5036
    Keywords: Glycine max (L.) Merr. ; nodulation ; nodule occupancy ; serogroup competitiveness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Soybean [Glycine max (L.) Merr.] forms a symbiosis with serogroups of Bradyrhizobium japonicum that differ in their dinitrogen fixing abilities. The objectives of this study were to identify soybean genotypes that would restrict nodulation by relatively inefficient serogroups indigenous to a large portion of the southeastern USA, and then characterize the nodulation responses of selected genotypes with specific bradyrhizobial strains under controlled conditions. From field screening trials followed by controlled single and competitive inoculations of serogroups USDA 31, 76 and 110, twelve soybean genotypes out of 382 tested were identified with varying levels of exclusion abilities. Soybean nodule occupancies and nodulation characteristics were influenced by plant genotype, environment (i.e. field or greenhouse), bradyrhizobial serogroup, and location of nodules (i.e. tap or lateral root). The cultivar Centennial sustains high seed yields even though it nodulates to a high degree with the inefficient serogroup USDA 31. In contrast, data from the released cultivars Braxton, Centennial and Coker 368 indicate that they may have been selected to exclude the inefficient serogroup USDA 76 from their tap root nodules, possibly contributing to high seed yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00013102
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  • 6
    Electronic Resource
    Electronic Resource
    Exclusion of inefficientBradyrhizobium japonicum serogroups by soybean genotypes (1990)
    Springer
    Plant and soil 122 (1990), S. 99-105 
    Details
    ISSN: 1573-5036
    Keywords: Glycine max (L.) Merr. ; nodulation ; nodule occupancy ; serogroup competitiveness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Soybean [Glycine max (L.) Merr.] forms a symbiosis with serogroups ofBradyrhizobium japonicum that differ in their dinitrogen fixing abilities. The objectives of this study were to identify soybean genotypes that would restrict nodulation by relatively inefficient serogroups indigenous to a large portion of the southeastern USA, and then characterize the nodulation responses of selected genotypes with specific bradyrhizobial strains under controlled conditions. From field screening trials followed by controlled single and competitive inoculations of serogroups USDA 31, 76 and 110, twelve soybean genotypes out of 382 tested were identified with varying levels of exclusion abilities. Soybean nodule occupancies and nodulation characteristics were influenced by plant genotype, environment (i.e. field or greenhouse), bradyrhizobial serogroup, and location of nodules (i.e. tap or lateral root). The cultivar Centennial sustains high seed yields even though it nodulates to a high degree with the inefficient serogroup USDA 31. In contrast, data from the released cultivars Braxton, Centennial and Coker 368 indicate that they may have been selected to exclude the inefficient serogroup USDA 76 from their tap root nodules, possibly contributing to high seed yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02444109
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  • 7
    Electronic Resource
    Electronic Resource
    Symbiotic effectiveness of Bradyrhizobium strains isolated from Parasponia and tropical legumes on Parasponia host species (1990)
    Springer
    Plant and soil 124 (1990), S. 117-126 
    Details
    ISSN: 1573-5036
    Keywords: Bradyrhizobium ; effectiveness ; groups ; incompatible ; tropical legumes ; nitrogen fixation ; nodulation ; non-legume ; Parasponia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The symbiotic effectiveness of Bradyrhizobium strains isolated from three species of Parasponia and from legumes were compared on Parasponia grown in Leonard-jars. Effectiveness of each symbiotic association was estimated from dry weight and total nitrogen of shoots and nodules of plants grown on medium free of combined nitrogen. Twenty strains isolated from three species of Parasponia were found to vary in their effectiveness on P. andersonii, the least effective fixing one fifth of the nitrogen of the most effective strains. The outcome of the symbiosis was not associated with the host source of the test strain. P. andersonii, P. rugosa and P. rigida responded differently to a selection of seven strains of Parasponia Bradyrhizobium; some strains were either ineffective or fully effective on each host, while others varied in their symbiotic performance. P. andersonii fixed significantly (P 〈 0.001) larger quantities of nitrogen than either P. rugosa or P. rigida with p. rigida being the least effective. In contrast to Bradyrhizobium strains from Parasponia spp. which formed nodules rapidly (within 11–20 days), nine strains isolated from legumes required between 25 and 74 days to form partially effective nodules. The thre Parasponia species formed relatively large quantities of nodule tissue relative to the amount of nitrogen fixed and shoot dry matter produced. The Bradyrhizobium isolated from Parasponia plants growing in Papua New Guinea soils could be grouped together on the basis of their infection characteristics on Parasponia and legumes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00010939
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  • 8
    Electronic Resource
    Electronic Resource
    Nodulation, biomass and nitrogen content in Sesbania species (1990)
    Springer
    Plant and soil 128 (1990), S. 221-223 
    Details
    ISSN: 1573-5036
    Keywords: green manure ; nitrogen content ; nodulation ; S. rostrata
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Sesbania rostrata developed nitrogen fixing nodules on the stem after spraying the plants with the bacterial culture TCSR 1. The number of stem nodules at 55 days after sowing was about 1200. Plants with stem nodules had a significantly reduced number of root nodules. The biomass of S. rostrata was comparable to the locally well adapted non-stem nodulating species S. aculeata. The %N and total nitrogen content were highest in S. rostrata compared to the other three species studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00011112
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  • 9
    Electronic Resource
    Electronic Resource
    Nodulation of Trifolium repens with modified Bradyrhizobium and the nodulation of Parasponia with Rhizobium leguminosarum biovar trifolii (1990)
    Springer
    Plant and soil 125 (1990), S. 49-61 
    Details
    ISSN: 1573-5036
    Keywords: cross-inoculation ; dual occupancy ; modified Bradyrhizobium ; nodulation ; Parasponia ; Rhizobium ; rhizosphere ; specificity ; Trifolium repens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Thirty one strains of Rhizobium leguminosarum biovar trifolii isolated from the North and South American continents, New Guinea, USSR, Turkey and Australia, nodulated P. andersonii ineffectively when grown in plant growth tubes and in Leonard jars. Nodules were slow to form, sometimes taking over 100 days. Reisolates of R. leguminosarum biovar trifolii from P. andersonii nodulated Trifolium repens and their identity was confirmed using serological techniques. Dual occupation of nodules by Rhizobium and Bradyrhizobium in P. andersonii is reported. The reduced effectiveness of the Bradyrhizobium symbiosis depended on the relative numbers of Rhizobium occupants in this dual system. R. leguminosarum biovar trifolii and Bradyrhizobium strains from Parasponia were able to co-exist in nodules on P. andersonii and maintain similar populations in the rhizosphere and on culture media. Bradyrhizobium strains, separated from R. leguminosarum biovar trifolii, were able to initiate and form nodule-like structures on T. repens. Bradyrhizobium bacteria were identified as the sole occupants of the cells of the nodule-like structures on Trifolium repens using an immunogold labelling technique applied to ultrathin sectins. The re-isolates of Bradyrhizobium obtained from these nodule-like structures on T. repens were able to effectively nodulate P. andersonii.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00010743
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  • 10
    Electronic Resource
    Electronic Resource
    The effect of VA mycorrhizal fungi, phosphorus and drought stress on the growth of Acacia nilotica and Leucaena leucocephala seedlings (1990)
    Springer
    Plant and soil 124 (1990), S. 7-13 
    Details
    ISSN: 1573-5036
    Keywords: Acacia nilotica ; drought resistance ; drought stress ; Leucaena leucocephala ; nodulation ; reforestation ; VA mycorrhizal fungi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effect of vesicular-arbuscular mycorrhizal (VAM) fungi on growth and drought resistance of Acacia nilotica and Leucaena leucocephala seedlings was studied in a glasshouse experiment. The experimental design was a 2·2·2 factorial: ± mycorrhizal inoculation, ± application of phosphorus fertilizer and ± repeated drought treatment. The growth promoting effect of VAM fungi equalled the effect of phosphorus fertilization after 12 weeks. The drought treatment reduced seedling biomass and nodulation. Differences between the plant species were found with respect to growth improvements due to VAM inoculation and/or phosphorus fertilization under drought stress conditions. The results are discussed in relation to plant drought resistance and reforestation in the subhumid to arid tropics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00010925
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  • 11
    Electronic Resource
    Electronic Resource
    Selection of balancing ions for nutritional studies in nutrient culture experiments (1990)
    Springer
    Plant and soil 124 (1990), S. 87-90 
    Details
    ISSN: 1573-5036
    Keywords: acetate ; chloride ; Lupinus angustifolius ; nodulation ; sand culture ; sulphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Nutrient culture studies frequently involve the use of balancing ions to equalize concentrations of essential nutrient elements. In a pot experiment in controlled environment with Lupinus angustifolius, growth and nodulation were assessed following calcium treatment (15 mM) using the acetate, chloride and sulphate salts in various combinations. Chloride depressed nodulation at levels higher than 20 mM; nodule mass and number were highest at the maximum sulphate concentration (13 mM). At the lowest sulphate level (2 mM), nodulation and root growth were depressed by 4 mM or higher acetate. Nodulation (dry weight and numbers of nodules) was maximized at 13 mM sulphate/4 mM chloride.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00010935
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  • 12
    Electronic Resource
    Electronic Resource
    Response of promiscuously nodulating soybean to N and P fertilization andBradyrhizobium inoculation in a ferruginous tropical soil (Haplustalf) (1990)
    Springer
    Nutrient cycling in agroecosystems 25 (1990), S. 93-100 
    Details
    ISSN: 1573-0867
    Keywords: Glycine max (L.) Merr. ; nitrogen and phosphorus fertilization ; Bradyrhizobium inoculation ; seed yield ; yield components ; nodulation ; growth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Field trials were conducted at Samaru, Nigeria over a three-year period (1986–88) to study the effects of N and P fertilization on the response of promiscuously nodulating soybean toBradyrhizobium japonicum inoculation in a ferruginous tropical soil. Phosphorus fertilization enhanced nodulation, while N fertilization had no consistent effect on nodulation. Both N and P increased dry matter production. Seed yields were not influenced by the application of N. However, P increased seed yields in two out of three years. Response of seed yield to P fertilization was significant up to 26.4 kg P ha−1.Bradyrhizobium inoculation consistently enhanced nodulation while it increased seed yield in only one out of three years. Results demonstrate that P is an important nutrient for soybean production in ferruginous tropical soils. The roles of promiscuously nodulating soybean in the maintenance of tropical soil fertility are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01095088
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  • 13
    Electronic Resource
    Electronic Resource
    Studies on the nodulation of strain-specific resistant pea lines using single, mixed and delayed inoculation byRhizobium leguminosarum (1990)
    Springer
    Plant and soil 122 (1990), S. 235-242 
    Details
    ISSN: 1573-5036
    Keywords: ELISA ; inoculation ; nodulation ; pea ; Pisum sativum L. ; Rhizobium leguminosarum ; strain-specific resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Symbiotic interactions between peas andRhizobium leguminosarum were investigated by inoculating four pea lines, three of which are strain-specific resistant to the European strain 311d, with various combinations of two strains of Rhizobium, 311d and Tom++. The strains were almost equally good to infect the susceptible European cultivar Hero when added singly inoculated. After mixed inoculation (1:1 proportion) strain analysis by ELISA revealed that the nodules were preferentially formed by 311d, although some Tom++ nodules were also found mainly on the upper part of the root. Our conclusion is that Tom++ is less compatible in comparison with 311d. In addition, we found that as the Hero plants emerged, they were becoming more resistant towards infection with not adapted bacteria. The strain-specific resistant lines from Afghanistan belong to two different systems: Afgh. I, completely resistant to 311d and highly nodulating with Tom++, and Afgh. III, incompletely resistant to 311d and poorly nodulating with Tom++. Mixed inoculations resulted in nodule depressions, as compared to single inoculations with Tom++ ranging from 87% to 14%. The ability of 311d to block infection sites on the roots were found to depend on the degree of symbiotic adaptation between Afgh. I and Tom++, respectively Afgh. III and Tom++. Strain analysis after double strain inoculation of Afgh. I plants revealed that some nodules were induced by strain 311d. Thus, the presence of Tom++ in this case influences the degree of host resistance. However, in Afgh. III plants the resistance towards nodulation were unaffected by the presence of Tom++. We suggest that the degree of symbiotic adaptation may change the barrier of resistance towards infection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02444238
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  • 14
    Electronic Resource
    Electronic Resource
    Effects of tall fescue turf on growth and nitrogen fixation potential of the woody legume Lupinus albifrons (1990)
    Springer
    Plant and soil 128 (1990), S. 199-208 
    Details
    ISSN: 1573-5036
    Keywords: competition ; Festuca arundinacea ; Lupinus albifrons ; nitrogen fixation ; nodulation ; root-length density ; sexual reproductive allocation ; turf
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effect of tall fescue turf on growth, flowering, nodulation, and nitrogen fixing potential of Lupinus albifrons Benth. was examined for greenhouse and field grown plants. No allelopathic effect was observed for lupine plants treated with tall fescue leachates. The nitrogen-fixing potential measured by nodule dry weight and acetylene reduction rates was not significantly affected by tall fescue turf. Both the greenhouse and field studies showed that the growth, sexual reproductive allocation and number of inflorescences were significantly reduced when lupine plants were grown with tall fescue. The root-length densities of tall fescue turf and lupine monoculture were measured. The tall fescue turf had 20 times higher root-length density (20 cm cm-3 soil) than the lupine plant monoculture. This suggests that intense competition at the root zone may be a dominant factor which limits the growth of the lupine plants. The flowering characters of the lupine plants were improved by phosphorus fertilization. Transplanting of older lupine plants into the turf substantially alleviated the tall fescue turf competitive effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00011110
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  • 15
    Electronic Resource
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    Chemotaxis, induced gene expression and competitiveness in the rhizosphere (1990)
    Springer
    Plant and soil 129 (1990), S. 45-52 
    Details
    ISSN: 1573-5036
    Keywords: chemoattractants ; luteolin ; nod gene ; nodulation ; phenolics ; Rhizobium ; symbiosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Rhizobia are soil bacteria which symbiotically infect legume roots and generate nodules in which they fix atmospheric nitrogen for the plant in exchange for photosynthetically fixed carbon. A crucial aspect of signal exchange between these symbionts is the secretion of phenolic compounds by the host root which induce nodulation gene expression in the bacteria. Stimulation of nod gene expression by host phenolics is required for nodule formation, is biochemically specific at 10-6 M, and is mediated by nodD. We and others have shown that rhizobia display chemotaxis to 10-9 M of the same phenolic compounds. Chemotaxis to inducer phenolics is selectively reduced or abolished by mutations in certain nod genes governing nodulation efficiency or host specificity. Conversely, mutations in rhizobia that affect general motility or chemotaxis have substantial effects on nodulation efficiency and competitiveness. These findings suggest that microbes entering the rhizosphere environment may utilize minor, non-nutrient components in root exudates as signals to guide their movement towards the root surface and elicit changes in gene expression appropriate to this environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00011690
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  • 16
    Electronic Resource
    Electronic Resource
    Effect of soil solarization on nodulation, infection by mycorrhizal fungi and yield of cowpea (1990)
    Springer
    Plant and soil 125 (1990), S. 153-154 
    Details
    ISSN: 1573-5036
    Keywords: Bradyrhizobium ; cowpea ; nodulation ; solarization ; VA mycorrhiza ; yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Solarization of soil was found beneficial for plant growth in cowpea under field conditions. Root nodulation, infection by mycorrhizal fungi and yield were higher in plants grown in solarized soil. These increases were to the extent of 104.7, 20.0 and 23.7 per cent respectively when compared to control treatment without solarization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00010757
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