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  • 1
    Electronic Resource
    Electronic Resource
    Promoting effect of fusicoccin on Na+ efflux in barley roots: evidence for a Na+−H+ antiport (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 2 (1979), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. The effect of fusicoccin (FC) on the K+stimulated Na+ efflux in root cells of Na+ loaded barley roots was studied. FC (0.02 mM) stimulated Na+ efflux in the presence of K+ and its effect was synergistic with that of K+, in a similar way as its effect on proton extrusion. Decreasing the pH of the elution medium promoted Na+ efflux and partially replaced the effect of FC. As FC is known to increase the electrochemical proton gradient at the plasmalemma level, these results are consistent with the hypothesis that Na+ is extruded in exchange for H+. A further support to this view came from the finding that Na+ efflux was also promoted by a lipophilic cation, tributylbenzylammonium (TBBA +), which stimulates H + extrusion and is generally accepted not to enter the cells by means of the same carrier as K +.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1979.tb00082.x
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  • 2
    Electronic Resource
    Electronic Resource
    Dissociation of H + extrusion from K+ uptake by means of lipophilic cations (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 2 (1979), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Dissociation of active H+ extrusion (−ΔH+) from K+ uptake in pea and maize root segments was attempted by substituting K+ in the incubation medium with lipophilic cations assumed to enter the cell by passive, non-specific, permeation through the lipid component of the plasmalemma. Among the compounds tested, tributylbenzylammonium significantly stimulated −ΔH+ in the absence of other monovalent cations in the medium. This effect was much more evident when the experiment was carried out in the presence of fusicoccin, which strongly stimulates proton extrusion and monovalent cation uptake, and hyperpolarizes the trans-membrane electric potential in these materials. Also the lipophilic cations tetraphenylphosphonium, dimethyldibenzylammonium and hexylguanidine markedly stimulated FC-promoted −ΔH+. Octylguanidine at a low concentration induced an early stimulation followed by a strong inhibition of −ΔH+. A complete lack of additivity was observed between the effects of lipophilic cations and that of K+ on H+ extrusion. Lipophilic cations severely inhibited K+ uptake.These data are interpreted as supporting the view of an electric, rather than a chemical, (namely, involving the same carrier system) nature of the coupling of active H+ extrusion with K+ influx.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1979.tb00772.x
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  • 3
    Electronic Resource
    Electronic Resource
    Germination ecology, emergence and host detection in Cuscuta campestris (2005)
    Oxford, UK : Blackwell Science Ltd
    Weed research 45 (2005), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Trials were carried out to study the germination and dormancy of Cuscuta campestris Y. (dodder) seeds and factors influencing the success of early parasitisation of sugarbeet. Primary dormancy can be removed by seed scarification. Germination was negligible at 10°C and optimal at 30°C, while it was not influenced by light. Seed burial induced a cycle of induction and breaking of secondary dormancy. Seedling emergence was inversely proportional to the depth of seed burial and only seed buried within 5 cm of the soil surface emerged. Storage of C. campestris seeds in a laboratory for 12 years resulted in the loss of primary dormancy, enabling the germination of all viable seeds. Host infection (i.e. protrusion of parasite haustoria from host tissue) was heavily influenced by host growth stage. Tropism towards a host was due to the perception of light transmitted by green parts of sugarbeet plants. Insertion of a transparent glass sheet between host leaves and parasite seedlings did not modify this response. This phototropism permitted Cuscuta to identify host plants with high chlorophyll content as a function of the lower red/far red ratio of transmitted light.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.2005.00460.x
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  • 4
    Electronic Resource
    Electronic Resource
    Taxonomic evaluation of Italian populations of Lolium spp. resistant and susceptible to diclofop-methyl (2002)
    Oxford UK : Blackwell Science Ltd
    Weed research 42 (2002), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A comprehensive research project was set up to characterize by different approaches some Italian populations of Lolium spp. susceptible and resistant to diclofop-methyl. The present study was aimed at the taxonomic identification of these Lolium populations on the basis of the electrophoretic analysis of seed reserve proteins. Electrophoresis confirmed the great range of variation detected by preliminary morphological analysis. Approximately half the individuals in each population could be classified as belonging to Lolium multiflorum or Lolium rigidum, the most common Lolium species present in the area. However, electrophoretic patterns revealed a significant number (40–60%) of hybrid individuals in all populations. The origin of these off-types was postulated as resulting from both intrageneric hybridization among different Lolium species and intergeneric hybridization between Lolium and Festuca genera. No significant differences were detected in the taxonomy of herbicide-susceptible and -resistant populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3180.2002.00271.x
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  • 5
    Electronic Resource
    Electronic Resource
    Photosynthetic and accessory pigments in Cuscuta campestris Yuncker and some host species (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 33 (1993), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Photosynthetic and accessory pigments (chlorophyll a and b, a and ß carotenes and xanthophylls) were evaluated in Cuscuta campestris Yuncker during the course of its biological cycle, taking into account both autotrophic and heterotrophic phases, and different parts of the parasite. Chloroplast activity in C. campestris was measured and comparisons were made with the chloroplast activity in Beta vulgaris L. and Convolvulus arvensis L. The effects of parasitization of C. campestris on the main and accessory photosynthetic pigments of B. vulgaris were also evaluated.Finally, a hypothesis was formulated to explain the different distribution of pigments in different parts and at different stages of the growth cycle in C. campestris and its chloroplast activity. Pigments photosynthétiques principaux et accessoires chez Cuscuta campestris Yuncker et des espèces hôtes Les pigments photosynthétiques principaux et accessoires (chlorophylles a et b, α et β carotènes, xanthophylles) ont été déterminés chez Cuscuta campestris Yuncker durant son cycle biologique. Les phases auttorophes et hétérotrophes ont été prises en compte et les mesures ont porté sur différentes parties des plantes. L'activité chloroplastique a été déterminée chez C. campestris et a été comparéà celles de Beta vulgaris L. et de Convolvulus arvensis L. Les conséquences du parasitisme de C. campestris sur les pigments principaux et accessoires de B. vulgaris ont aussi étéétudiées.Enfin, une hypothèse a été avancée pour expliquer les différences de distribution des pigments dans les différentes parties de C. campestrisà divers stades de son cycle biologique, ainsi que son activité chloroplastique. Photosynthese- und akzessorische Pigmentre in Cuscuta campestris Yuncker und einigen WirstspflanzenartenBei Cuscuta campestris Yuncker wurden im Verlaufe ihres Lebenszyklus die Photosynthese- und akzessorischen Pigmenten (Chlorophyll a und b, a- und ß-Karotin, Xanthophylle) sowohl in autotrophen als auch heterotrophen Phasen und in verschiedenen Pflanzenteilen untersucht. Die Chloroplastenaktivität wurde gemessen und mit der von Beta vulgaris L. und Convolvulus arvensis L. vergleichen. Die Wirkung der Parasitierung von Cuscuta campestris auf die Photosynthese-Pigmente von Beta vulgaris wurd erfaßt. Eine Hypothese über die Chloroplastenaktivität und zur verschiedenen Verteilung der Pigmente in den verschiedenen Pflanzenteilen und in verschiedenen Entwicklungsstadien von Cuscuta campestris wurde formuliert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1993.tb01939.x
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  • 6
    Electronic Resource
    Electronic Resource
    Measurement of stratospheric trace constituent distributions from balloon-borne far infrared observations
    Amsterdam : Elsevier
    Advances in Space Research 7 (1987), S. 137-140 
    Details
    ISSN: 0273-1177
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0273-1177(87)90262-6
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of plasmalemma ATPase inhibitors, diethylstilbestrol and orthovanadate, on fusicoccin-induced H^+ extrusion in maize roots
    Amsterdam : Elsevier
    Plant Science Letters 21 (1981), S. 305-315 
    Details
    ISSN: 0304-4211
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0304-4211(81)90103-6
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of calmodulin inhibitors in plants. I. Synergism with fusicoccin in the stimulation of growth and H^+ secretion and in the hyperpolarization of the transmembrane electric potential
    Amsterdam : Elsevier
    Plant Science Letters 23 (1981), S. 253-262 
    Details
    ISSN: 0304-4211
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0304-4211(81)90035-3
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  • 9
    Electronic Resource
    Electronic Resource
    Uptake and accumulation at membrane level of the calmodulin antagonist chlorpromazine in higher plants
    Amsterdam : Elsevier
    Plant Science Letters 30 (1983), S. 267-277 
    Details
    ISSN: 0304-4211
    Keywords: Ca^2^+ ; Calmodulin antagonist ; Chlorpromazine membrane binding ; Maize roots
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0304-4211(83)90165-7
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  • 10
    Electronic Resource
    Electronic Resource
    On the effects of cholesterol on H^+ extrusion and on growth in maize root segments: Comparison with brassinosteroid
    Amsterdam : Elsevier
    Plant Science 38 (1985), S. 99-105 
    Details
    ISSN: 0168-9452
    Keywords: H^+ extrusion ; brassinosteroid ; cell enlargement ; cholesterol ; maize roots
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-9452(85)90137-2
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