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  • 1
    Electronic Resource
    Electronic Resource
    Interrelationships between Gramineae lectins (1983)
    Springer
    Planta 157 (1983), S. 138-142 
    Details
    ISSN: 1432-2048
    Keywords: Avena (lectin) ; Hordeum (lectin) ; Lectin ; Triticum (lectin) ; Zea (lectin)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two Gramineae species, oat and maize, are compared with wheat and barley to see if they contain lectins which are structurally and functionally similar to the Hordeae lectins. Four distinct criteria were examined: localisation of lectin activity in the seed, ability to agglutinate a defined type of erythrocyte in a reaction reversed by monomers or oligomers of n-acetyl-d-glucosamine, ability to bind to the affinity matrix p-aminobenzyl-1-thio-2-acetamido-2-deoxy-β-d-glucopyranoside-substituted Sepharose, and cross-reactivity with monospecific antisera raised to wheat-germ agglutinin. Results indicate that the very close relationship found between the lectins of wheat, barley and rye cannot be extended to those species of Gramineae outside the tribe Hordeae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393647
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  • 2
    Electronic Resource
    Electronic Resource
    Endopeptidase activity in jackbeans and its effect on Concanavalin A (1983)
    Springer
    Planta 157 (1983), S. 531-535 
    Details
    ISSN: 1432-2048
    Keywords: Canavalia ; Concanavalin A ; Peptidase, endo-
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Endopeptidase activity in mature jackbeans has been characterised. One major activity is present, that of a neutral metallo-endopeptidase. Using specific inhibitors it can be shown that the Concanavalin A-associated fragments are not formed by proteolytic degradation of the intact subunit on hydration of the tissue. The intact subunit of the lectin is also resistant to the degradation by the endogenous endopeptidase activity during a prolonged incubation in vitro. These results suggest that the lectin fragments have been formed during seed maturation and no further limited proteolysis of Concanavalin A occurs during the early stages of germination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00396884
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of inter-relationship of jackbean seed components by two-dimensional mapping of iodinated tryptic peptides (1983)
    Springer
    Planta 157 (1983), S. 536-539 
    Details
    ISSN: 1432-2048
    Keywords: Canavalia ; Concanavalin A ; α-Mannosidase ; Peptide-mapping ; Precanavalin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The subunits of Concanavalin A, α-mannosidase and the main storage protein of jackbeans have been compared using the technique of peptide-mapping of iodinated tryptic peptides. The results indicate there is no structural relatedness between the lectin, enzyme and storage protein. Peptide maps of the lectin fragments which copurify with the intact subunit indicate that cleavage points additional to that between residues 118–119 most probably occur.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00396885
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  • 4
    Electronic Resource
    Electronic Resource
    Distribution of lectins in membranes of soybean and peanut plants (1979)
    Springer
    Planta 145 (1979), S. 193-198 
    Details
    ISSN: 1432-2048
    Keywords: Lectins ; Membranes ; Peanut ; Soybean
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The distribution of lectin activity in soybean and peanut plants has been investigated. In both plants activity is found in all tissues examined (roots, shoots and leaves) at all stages of development from seedling to maturity (7 weeks). The cellular location of the lectins differs between soybean and peanut: in soybean the lectins are generally membrane-associated, whereas in peanut plants lectin activity is present also in the soluble cytoplasmic fraction. The membrane-associated lectins appear to differ from the seed lectins of the respective plants. The function of membrane-associated lectins is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388717
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  • 5
    Electronic Resource
    Electronic Resource
    Some properties of carbohydrate-binding proteins (lectins) solubilized from cell walls of Phaseolus aureus (1976)
    Springer
    Planta 130 (1976), S. 169-174 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary From the cell walls of nongrowing segments of mung bean hypocotyls two protein fractions can be solubilized which show carbohydrate binding properties as measured with the hemagglutination assay. The extracts show appreciable binding activity only if the walls are treated with boiled cytoplasmic supernatant prior to extraction; Mn2+ is only partly effective in a similar way. Hydrolase activity in the extracts is strongly diminished by sequential washing of the walls with sodium dodecylsulphate; extensive washings, however, result in inactivation of the hemagglutination activity. The carbohydrate binding activity of both extracts is strongly diminished towards acidic pH-values and is inhibited by D-galactose and γ-D-galactonolactone. The possible involvement of the binding proteins in extension growth is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384415
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  • 6
    Electronic Resource
    Electronic Resource
    The size and distribution of polysaccharides during their synthesis within the membrane system of maize root cells (1976)
    Springer
    Planta 128 (1976), S. 101-106 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The polymers contained within pellets rich in either dictyosomes or the endoplasmic reticulum have been investigated. These were detected by the incorporation of radioactivity from D-[U-14C]glucose into the sugars in the intact root. Three types of material were obtained 1) water-soluble 2) soluble in chloroform 3) insoluble. The relative proportions of each of these 3 fractions were different in the 2 membrane preparations. The dictyosome pellet contained a high proportion of water-soluble material, some of the water-soluble polysaccharides contained in both membrane preparations had a molecular weight greater than 40,000. These polymers resembled the pectins and xylans deposited in the cell wall. Some of the insoluble material could be rendered soluble by incubation with proteolytic enzymes and all of this from the dictyosome pellet had a molecular weight greater than 4,000 whereas most of that obtained from the endoplasmic reticulum had a molecular weight less than 4,000 and it did not contain fucose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00390310
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  • 7
    Electronic Resource
    Electronic Resource
    Glucosylation of sterols and polyprenolphosphate in the Golgi apparatus of Phaseolus aureus (1977)
    Springer
    Planta 134 (1977), S. 177-181 
    Details
    ISSN: 1432-2048
    Keywords: Acylsteryl-glucosides ; Dolichylmonophosphateglucoside ; Golgi membranes ; Phaseolus aureus ; Sterylglucosides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cellular membranes from dark grown hypocotyls of Phaseolus aureus Roxb. were separated by centrifugation on a continuous sucrose gradient. Each gradient fraction was monitored for activity of inosine diphosphatase (EC 3.6.1.6) and the ability to transfer glucose from UDP-[14C]glucose to endogenous lipids in vitro. The highest incorporation of radioactivity into lipids occurred in a particulate fraction correlated with the Golgi apparatus, sedimenting at sucrose densities of 31.5–33% w/w. Three endogenous lipids were glucosylated in vitro. The two main lipids were characterized as steryl glucoside and acylated steryl glucoside; data from chromatography and hydrolysis of the third lipid suggests that it is dolichyl-monophosphate-glucoside. Steryl glucoside was found to be the main glucoside synthesized, but the proportion of the acylated form increased with time. The results are discussed in the context of the role of the Golgi apparatus as a centre of membrane modification within the plant cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384968
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  • 8
    Electronic Resource
    Electronic Resource
    Temporal and spatial regulation of a novel gene in barley embryos (1992)
    Springer
    Plant molecular biology 20 (1992), S. 255-266 
    Details
    ISSN: 1573-5028
    Keywords: barley (Hordeum vulgare) ; zygotic embryogenesis ; plant development ; gene expression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The temporal and spatial pattern of expression of a novel barley gene is described. The gene has been identified through the differential screening of a cDNA library constructed to poly(A)+ RNA of zygotic embryos. Transcripts corresponding to the cDNA, pZE40, become abundant in the non-axial tissues of the developing embryo within 8–10 days after anthesis, when steady-state levels are high in the scutellum, coleoptile and coleorhiza, with the exception of the scutellar epithelium. This expression pattern is maintained throughout maturation of the embryo until levels eventually decline as the grain desiccates. On germination, there is a transient re-appearance of mRNA to pZE40, with accumulation specifically restricted to the scutellum of the seedling. In situ hybridization has enabled the detection of transcripts elsewhere in the barley plant, in highly localized groups of cells. The timing and cell specificity of expression suggests the gene product is involved in the synthesis and/or transport of metabolites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00014493
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  • 9
    Electronic Resource
    Electronic Resource
    Local and systemic changes in gene expression induced in tomato plants by wounding and by elicitor treatment (1989)
    Springer
    Planta 179 (1989), S. 367-375 
    Details
    ISSN: 1432-2048
    Keywords: Cell signalling ; Elicitor ; Gene expression ; Lycopersicon (wounding, elicitor) ; Wound response (local/systemic)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Tomato (Lycopersicon esculentum Mill. cv. Moneymaker) plants have been wounded to induce the accumulation of proteinase-inhibitor proteins (PI proteins) at the local site of injury and systemically in unwounded tissues. To determine the range of genes affected in the wound-response, polysomal mRNA has been isolated from the damaged leaves and from systemically responding leaves over a time-course of 2, 4, 10 and 24 h after wounding. Changes in the pattern of 35S-translation products indicate that the events that occur at the local wound-site are different from those that occur systemically, both with respect to the number of genes that are regulated and the timing of their regulation. In order to compare the effects of wounding and an endogenous systemic signal generated at the wound-site with those of elicitor (proteinase-inhibitor-inducing factor, PIIF) treatment of excised plants, polysomal mRNA has also been isolated from leaves of plants over a time-course of 2, 4, 10 and 24 h after PIIF-treatment. Changes in the pattern of 35S-translation products indicates that the events induced by PIIF resemble those induced by mechanical injury, rather than those induced by the endogenous systemic signal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391082
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  • 10
    Electronic Resource
    Electronic Resource
    Studies on α-D-mannosidase and ConA during jackbean development and germination (1988)
    Springer
    Protoplasma 144 (1988), S. 34-45 
    Details
    ISSN: 1615-6102
    Keywords: ConA, α-D-mannosidase ; Immunogold labelling ; Seed cotyledons ; Legumes ; Development ; Germination ; Membrane traffic ; Targeting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Changes in the level and activity of α-D-mannosidase and ConA have been followed during a time-course of development spanning seed formation, desiccation and germination. In parallel studies, immunogold labelling has enabled these changes to be placed within a structural context of the cotyledon parenchyma cells during protein body formation, dehydration and subsequent autolysis during germination. The results indicate that the exo-glycosidase and lectin accumulate in parallel during seed formation and are packaged within the same protein bodies. Several lines of evidence suggest that the function of both proteins is related to events that occur during seed development rather than germination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01320278
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