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  • 1
    Electronic Resource
    Electronic Resource
    Resistance to Aluminium and Manganese Toxicities in Plants related to Variety and Cation-Exchange Capacity (1962)
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 85-86 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Twenty varieties of Lolium perenne and L. multi-florum were screened for resistance to aluminium toxicity. Twenty seeds of each variety were sown in 800 gm. of silica sand contained in wax cartons (Mono Containers, Ltd.) of 500 ml. capacity, with three replications. The cartons had provision for ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/196085a0
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  • 2
    Electronic Resource
    Electronic Resource
    Evaluation of two coal-derived organic products in ameliorating surface and subsurface soil acidity (1995)
    Oxford, UK : Blackwell Publishing Ltd
    European journal of soil science 46 (1995), S. 0 
    Details
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Acidity in the soil surface and subsurface is of major concern in horticulture, cropping and pasture production systems in southern Australia. Broadcast applications of lime to the surface have proved to be ineffective in ameliorating subsurface acidity in the short term. Two calcium-saturated coal-derived organic products, an ‘oxi-product’ (OXPR) and an ‘oxi-fulvate’ (OXFU), were evaluated for use as liming materials with specific consideration given to amelioration of subsurface acidity. The effects of these two organic products and of lime on the chemical composition of the A1 and A2 horizons of an acid red podzol were investigated in leaching columns, 20 cm long. OXPR and OXFU supplying 80 or 160 g Ca m−2 were compared to 160 g Ca m−2 applied as CaCO3 and a control receiving no amendments. The effects of CaCO3 on exchangeable Al and pH were limited to the surface 2 cm. In contrast, the two organic amendments were effective in decreasing exchangeable Al and increasing pH and exchangeable Ca to depth, the extent being a function of amendment and rate applied. The formation of inorganic and organic complexes were assumed to be responsible for the movement of Al out of the column in the leachate, although significant quantities of Al were precipitated in the column. Significant linear regressions were observed between the ionic strength and Al in the leachate. Significant quantities of Mg and K were displaced by Ca and leached from the column; consequently, this loss must be considered against the benefits of decreased exchangeable Al when assessing fertility for plant production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2389.1995.tb01813.x
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  • 3
    Electronic Resource
    Electronic Resource
    Heterogeneity of sulphur content in the storage proteins of pea cotyledons (1979)
    Springer
    Planta 146 (1979), S. 463-466 
    Details
    ISSN: 1432-2048
    Keywords: Legumin ; Pisum ; Protein (seeds) ; Storage proteins ; Sulphur ; Vicilin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract By means of crossed immunoelectrophoresis of the cotyledonary storage proteins of Pisum sativum L. it was shown that reduced accumulation of the legumin fraction, resulting from severe sulphur deficiency during growth, is accompanied by relative suppression of a quantitatively minor storage protein (Peak 3) shown previously by subunit analysis to be related to the vicilin series of holoproteins. The pattern of isotopic labelling of the storage proteins after injection of [35S]methionine into the pedicel during seed development under normal nutritional conditions indicated that Peak-3 protein, like legumin, has a relatively high content of sulphur amino-acids. Like certain of the vicilin molecules carrying the determinants responsible for Peak-4, Peak-3 protein binds selectively to concanavalin A.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00380861
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  • 4
    Electronic Resource
    Electronic Resource
    Alkalinity effects of different tree litters incubated in an acid soil of N.S.W., Australia (1999)
    Springer
    Agroforestry systems 46 (1999), S. 147-160 
    Details
    ISSN: 1572-9680
    Keywords: extractable cations ; pH ; soil chemical property impact index ; site remediation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The impact of trees on processes involved in soil acidification is not clearly understood. This study has measured the cation and anion composition of leaf litter from 28 tree species including both indigenous species and those exotic to Australia, which varied widely in composition. The excess cation content was calculated and shown to be highly correlated with ash alkalinity, determined by ashing and titration. Calcium (Ca) was the dominant cation in these samples and was highly correlated with ash alkalinity. Four rates of ground litter samples were incubated with an acid soil and after eight weeks soil pH and extractable cations were determined. The pH was strongly influenced by the addition of litter, and the increase in pH was linearly related to the amount of ash alkalinity added. Extractable Ca in the soil was highly correlated with Ca added in the litter. A second property of litter measured was the ability of water extracts from the material to complex aluminium (Al). This was assessed by reacting leaf litter extract with Al solution under standardised conditions and measuring the uncomplexed (monomeric) Al using the 8-hydroxyquinoline 15 sec reaction. Species varied markedly in complexing ability. Using the two properties, complexing ability and ash alkalinity, a framework is developed in which the effects of different species on nutrient cycling and podzolisation processes in relation to soil acidification are discussed, and predictions compared with available evidence from field studies. This index for assessing the potential impact of the removal/addition plant material could be used to predict the long- term consequences of cut and carry agroforestry systems on soil chemical properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006299615488
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  • 5
    Electronic Resource
    Electronic Resource
    Leaf litter ash alkalinity and neutralisation of soil acidity (1996)
    Springer
    Plant and soil 179 (1996), S. 293-302 
    Details
    ISSN: 1573-5036
    Keywords: aluminium ; ash alkalinity ; soil acidity ; soil amelioration ; tree litter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Soil acidification is a major factor limiting the sustainability of agricultural production systems throughout the world. Liming may not always be economically possible and therefore alternative methods or complementary methods of amelioration are required. Leaf litter collected from several tree species was examined for ash alkalinity (as an estimate of organic anion content) and ability to ameliorate an acid soil. Ash alkalinity measured by titration of the ash and excess cation values obtained by calculation as the difference between cation and anion content were correlated. Values obtained by the latter method ranged from 247 cmol c kg-1 for Melia azedarach (white cedar) to 36 cmol c kg-1 for Eucalyptus globoidea (white stringybark). There was a significant linear correlation between ash alkalinity and the Ca concentration in the litter. When added to an acid soil (pH 4.04 measured in 0.01 M calcium chloride) and incubated for 8 weeks, leaf litter raised the pH. Species differed markedly with Melia azedarach having the greatest effect. The increase in pH was proportional to the quantity of ash alkalinity (organic anions) added, expressed as calcium carbonate equivalents. Aluminium levels on the exchange complex were lowered by treatment with leaf litter through direct precipitation of a solid phase and again Melia azedarach litter was most effective. There was also indirect evidence of organo-Al complexes affecting the concentration of monomeric Al in soil treated with litter from Liquidambar styraciflua (liquidambar), Quercus robur (English oak) and Pinus radiata (radiata pine).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00009340
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of fluoride supply on fluoride concentrations in five pasture species: Levels required to reach phytotoxic or potentially zootoxic concentrations in plant tissue (2000)
    Springer
    Plant and soil 227 (2000), S. 223-233 
    Details
    ISSN: 1573-5036
    Keywords: fluoride ; plant uptake ; pasture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Recent findings have highlighted the possibility of increased fluoride (F) concentrations in herbage through F taken up from soil via the plant root. This paper aimed to assess the risk of F concentrations reaching phytotoxic or zootoxic concentrations in pasture plants. Five plant species commonly found in improved pastures in Australia, the sown species subterranean clover (Trifolium subterranean) and cocksfoot (Dactylis glomerata), and weeds barley grass (Hordeum leporinum), scotch thistle (Onopordum acanthium) and sorrel (Rumex acetosella) were grown in complete nutrient solutions with graded levels of added F to determine the effects of F− activity in solution on phytotoxicity and uptake of F by their roots. A model was developed using data from these solution culture experiments and data from the literature. The model assessed uptake of F by plants grown over a range of soil pH values and determined the risk of F taken up through the plant roots reaching phytotoxic concentrations, or concentrations potentially injurious to grazing animals, in the plant shoots. Modelling data suggested that the plants studied would not accumulate phytotoxic concentrations of F in shoots or concentrations of F deleterious to grazing animals through root uptake in neutral pH agricultural soils. The risks from F addition to soils in phosphatic fertilisers leading to reduction in pasture growth or animal health are therefore low. However, in highly F-polluted soil, as the soil becomes more acidic or alkaline, the risk of zootoxic concentrations of F in shoots of plants would increase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026523031815
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  • 7
    Electronic Resource
    Electronic Resource
    Restoration of protein level in detached leaves by supply of sulphate (1969)
    Springer
    Plant and soil 31 (1969), S. 385-388 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Young leaves were removed from plants grown at a range of sulphur levels and incubated in solutions with and without sulphate. In the absence of sulphate alcohol-insoluble N in the leaves declined irrespective of sulphur status. Sulphate arrested or reversed the decline in leaves from sulphur-deficient plants but had no such effect on leaves from plants grown with adequate sulphur. The difference in response patterns between deficient and non-deficient plants, induced by sulphate treatment could form the basis for a plant test for sulphur deficiency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01373584
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  • 8
    Electronic Resource
    Electronic Resource
    Screening Arabidopsis for mutants in mineral nutrition (1993)
    Springer
    Plant and soil 155-156 (1993), S. 131-134 
    Details
    ISSN: 1573-5036
    Keywords: Arabidopsis thaliana ; minerals ; mutants ; screening ; X-ray fluorescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Arabidopsis thaliana is a small herbaceous plant which is used as a model plant for defining the molecular basis of many plant processes. The advantages of this plant for genetic studies are its small, well-characterized genome, a short life cycle, large seed set and small seed size. The analysis of mutants of this plant has proved useful in understanding basic plant processes. To isolate Arabidopsis mutants in mineral nutrition, we have devised a method of screening based on X-ray fluorescence spectrometry (XRFS) analysis of leaves. We have identified three mutants in P and Mn nutrition after screening over 100 000 seedlings. These mutants show either excessive accumulation of P or Mn in shoots or an inabilty to accumulate normal concentrations of P.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00025001
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  • 9
    Electronic Resource
    Electronic Resource
    Determination of forms of sulphur in plant material by x-ray fluorescence spectrometry (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 19 (1990), S. 63-65 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A method is described for the determination of S6+ (sulphate) and Sc (C - S bonded sulphur) in plant material by x-ray fluorescence spectrometry which is considerably more simple and rapid than the chemical determinations of the corresponding sulphur forms.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300190207
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  • 10
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    Heterogeneity of sulphur content in the storage proteins of pea cotyledons (1979)
    Springer
    Details
    Publication Date: 1979-09-01
    Print ISSN: 0032-0935
    Electronic ISSN: 1432-2048
    Topics: Biology
    Published by Springer
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