Kooperativer Bibliotheksverbund

Berlin Brandenburg

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  • 1
    Language: English
    In: New Phytologist, Sept, 2010, Vol.187, p.879(4)
    Description: To authenticate to the full-text of this article, please visit this link: http://dx.doi.org/10.1111/j.1469-8137.2010.03417.x Byline: Gunter Neumann Keywords: cluster roots; lateral root formation; Lupinus albus; nitric oxide (NO); phosphorus (P) mobilization; root exudation
    ISSN: 0028-646X
    Source: Cengage Learning, Inc.
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  • 2
    Language: English
    In: New Phytologist, Sept, 2010, Vol.187, p.879(4)
    Description: To authenticate to the full-text of this article, please visit this link: http://dx.doi.org/10.1111/j.1469-8137.2010.03417.x Byline: Gunter Neumann Keywords: cluster roots; lateral root formation; Lupinus albus; nitric oxide (NO); phosphorus (P) mobilization; root exudation
    ISSN: 0028-646X
    Source: Cengage Learning, Inc.
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  • 3
    Language: English
    In: Plant and Soil, 2011, Vol.339(1), pp.285-297
    Description: There is not much information on the mechanism(s) by which phosphate solubilizing microorganisms (PSM) increase plant phosphorus (P) uptake. Studies with PSM inoculated wheat plants grown in both microcosms and rhizoboxes were conducted to determine whether inoculations with PSMs acidify rhizosphere. Significant ( P  〈 0.05) increases by bacterial inoculation were obtained in rate of proton efflux by roots (by the strains # 67, 189, and 73), plant P uptake (by # 169 and 189), K uptake (by # 67, 189, 73, 169, and 145), and uptake of P against the uptake of Ca and Mg (by # 67, 189, 73, 169, and 145) in a calcerous soil without fertilization. Only Bacillus sp. # 189 significantly ( P  〈 0.05) raised available P in the rhizosphere. Plant available P by Olsen extraction in the control and the # 189 inoculation were 6.3 and 8.0 mg kg -1 , respectively. The root induced acidification in nutrient solution with ammonium (NH 4 + -N) supply by inoculation of Bacillus sp. # 189 was confirmed in a rhizobox experiment when nitrogen source was NH 4 + -N. Enhanced proton extrusion by plant roots accompanied probably by the release of extra organic acid anions may contribute to mobilization and uptake of P in Bacillus sp. # 189 inoculated wheat plants in this study. The changes in total uptake and balance of nutrients in the PSM inoculations imply a modification of plant cell metabolism.
    Keywords: Phosphate solubilization ; Rhizosphere ; Available phosphorus ; Proton extrusion ; Microcosm ; Rhizobox
    ISSN: 0032-079X
    E-ISSN: 1573-5036
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  • 4
    In: New Phytologist, September 2010, Vol.187(4), pp.879-882
    Description: Includes references ; p. 879-882.
    Keywords: Cluster Roots ; Lateral Root Formation ; Lupinus Albus ; Nitric Oxide No ; Phosphorus P Mobilization ; Root Exudation
    ISSN: 0028-646X
    E-ISSN: 1469-8137
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  • 5
    Language: English
    In: Plant and Soil, 2011, Vol.342(1), pp.249-263
    Description: It has been repeatedly demonstrated that phosphate (P) and the herbicide glyphosate compete for adsorption sites in soils. Surprisingly, the potential consequences of these interactions for plants e.g. re-solubilisation of phytotoxic glyphosate residues in soils by application of P fertilisers or by root-induced mechanisms for P mobilization have not been investigated so far. In model experiments under greenhouse conditions, the potential for glyphosate re-mobilisation by P-fertiliser application was evaluated by bio-indication with soybean ( Glycine max L.) cultivated on five contrasting soils with or without glyphosate application at 10–35 days before sowing. Different levels of P-fertilisation (0, 20, 40, 80, 240 mg P kg −1 soil) were supplied at the date of sowing. Visual symptoms of glyphosate toxicity, plant biomass, intracellular shikimate accumulation as physiological indicator for glyphosate toxicity and the plant nutritional status were determined. On glyphosate-treated soils, P application induced significant plant damage. Expression of damage symptoms declined in the order Arenosol 〉 Acrisol ≈ Ferralsol 〉 Luvisol subsoil 〉 Regosol. On the Arenosol, Ferralsol and Luvisol subsoil plant damage was associated with increased shikimate accumulation in the root tissue. On the Acrisol decline of germination and plant damage in absence of shikimate accumulation indicate toxicity of AMPA (aminomethylphosphonic acid) as the main metabolite of glyphosate in soils. On the Regosol, a growth-stimulating effect of glyphosate soil application (hormesis) was detected. The results suggest that re-mobilisation of glyphosate may represent an additional transfer pathway for glyphosate to non-target plants which is strongly influenced by soil characteristics such as P fixation potential, content of plant-available iron, pH, cation exchange capacity, sand content and soil organic matter.
    Keywords: Glyphosate ; Phosphorus ; Re-mobilisation ; Rhizosphere ; Root growth ; Micronutrients
    ISSN: 0032-079X
    E-ISSN: 1573-5036
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  • 6
    Language: English
    In: Frontiers in plant science, 2015, Vol.6, pp.1224
    Description: Although a role of ethylene in the regulation of senescence and plant stress responses in general has a long history, a possible involvement in the regulation of adaptive responses to nutrient deficiencies has been mainly investigated since the last two decades. In the case of plant responses to phosphate (Pi) starvation, ethylene was identified as a modulator of adaptive responses in root growth and morphology. The molecular base of these adaptations has been elucidated in supplementation studies with ethylene precursors and antagonists, as well as analysis of mutants and transgenic plants with modified ethylene biosynthesis and responsiveness, using mainly Arabidopsis thaliana as a model plant. However, increasing evidence suggests that apart from root growth responses, ethylene may be involved in various additional plant adaptations to Pi limitation including Pi mobilization in the rhizosphere, Pi uptake and internal Pi recycling. The ethylene-mediated responses are frequently characterized by high genotypic variability and may partially share common pathways in different nutrient limitations.
    Keywords: Ethylene ; Phosphate Acquistion ; Phosphate Deficiency ; Root Growth ; Root Morphology
    ISSN: 1664-462X
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  • 7
    Language: English
    In: Environmental Pollution, January 2017, Vol.220, pp.1024-1035
    Description: is a plant species with ability of growing on heavy metal-polluted soils. Ecotypes of this species naturally growing in polluted areas can accumulate and tolerate different amounts of heavy metals (HM), depending on soil contamination level at their origin. Heavy metal tolerance of various ecotypes collected from contaminated (AP, SP) and non-contaminated (BG) sites was compared by cultivation on a highly HM-contaminated river sediment and a non-contaminated agricultural control soil. Tissue-specific HM distribution was analyzed by laser ablation-inductively-coupled plasma-mass spectroscopy (LA-ICP-MS) and photosynthetic activity by non-invasive monitoring of chlorophyll fluorescence. Plant-mineral analysis did not reveal ecotype-differences in concentrations of Cd, Zn, Cu in shoots of plants, suggesting no differential expression of root uptake or root to shoot translocation of HM. There was also no detectable rhizosphere effect on HM concentrations on the contaminated soil. However, despite high soil contaminations, all ecotypes accumulated Zn only in the concentration range of generally reported for normal growth of plants, while Cu and Cd concentrations were close to or even higher than the toxicity level for most plants. As a visible symptom of differences in HM tolerance, only the AP ecotype was able to enter the generative phase to complete its life cycle. Analysis of tissue-specific metal distribution revealed significantly lower concentrations of Cd in the leaf mesophyll of this ecotype, accumulating Cd mainly in the leaf petioles. A similar mesophyll exclusion was detectable also for Cu, although not associated with preferential accumulation in the leaf petioles. However, high mesophyll concentrations of Cd and Cu in the SP and BG ecotypes were associated with disturbances of the photosynthetic activity. The findings demonstrate differential expression of HM exclusion strategies in ecotypes and suggest Cd and Cu exclusion from the photosynthetically active tissues as a major tolerance mechanism of the AP ecotype. Cadmium compartmentation in the petioles of ecotype originating from an area around Aluminum Plant (AP ecotype) was revealed as a major Cd tolerance mechanism restricting it from the photosynthetically active tissues. LA-ICP-MS analysis of the spatial distribution of Cd in the cross sections petiole of Artemisia fragrans ecotypes grown for 80 days in the Kuchenbuch growth system (Engels et al., 2000) on non-contaminated control and heavy metal contaminated soils. The Cd concentrations in leaves of the AP ecotype are expressed as the Cd: C ratio along the ablation pathway through the plant tissue. This study identifies ecotype-specific tolerance mechanisms and tissue-specific distribution of heavy metals in adapted wild plant species.
    Keywords: Artemisia Ecotypes ; Heavy Metals ; Plant Tolerance ; Metal Compartmentation ; Photosynthetic Apparatus ; Engineering ; Environmental Sciences ; Anatomy & Physiology
    ISSN: 0269-7491
    E-ISSN: 1873-6424
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  • 8
    In: PLoS ONE, 2017, Vol.12(10)
    Description: Objective Genetic and immunological data indicate that inflammatory bowel disease (IBD) are characterized by specific inflammatory protein profiles. However, the serum proteome of IBD is still to be defined. We aimed to characterize the inflammatory serum protein profiles of Crohn’s disease (CD) and ulcerative colitis (UC), using the novel proximity extension assay. Methods A panel of 91 inflammatory proteins were quantified in a discovery cohort of CD (n = 54), UC patients (n = 54), and healthy controls (HCs; n = 54). We performed univariate analyses by t-test, with false discovery rate correction. A sparse partial least-squares (sPLS) approach was used to identify additional discriminative proteins. The results were validated in a replication cohort. Results By univariate analysis, 17 proteins were identified with significantly different abundances in CD and HCs, and 12 when comparing UC and HCs. Additionally, 64 and 45 discriminant candidate proteins, respectively, were identified with the multivariate approach. Correspondingly, significant cross-validation error rates of 0.12 and 0.19 were observed in the discovery cohort. Only FGF-19 was identified from univariate comparisons of CD and UC, but 37 additional discriminant candidates were identified using the multivariate approach. The observed cross-validation error rate for CD vs . UC remained significant when restricting the analyses to patients in clinical remission. Using univariate comparisons, 16 of 17 CD-associated proteins and 8 of 12 UC-associated proteins were validated in the replication cohort. The area under the curve for CD and UC was 0.96 and 0.92, respectively, when the sPLS model from the discovery cohort was applied to the replication cohort. Conclusions By using the novel PEA method and a panel of inflammatory proteins, we identified proteins with significantly different quantities in CD patients and UC patients compared to HCs. Our data highlight the potential of the serum IBD proteome as a source for identification of future diagnostic biomarkers.
    Keywords: Research Article ; Medicine And Health Sciences ; Medicine And Health Sciences ; Medicine And Health Sciences ; Biology And Life Sciences ; Medicine And Health Sciences ; Medicine And Health Sciences ; Biology And Life Sciences ; Biology And Life Sciences ; Medicine And Health Sciences ; Biology And Life Sciences ; Medicine And Health Sciences ; Biology And Life Sciences ; Medicine And Health Sciences ; Biology And Life Sciences
    E-ISSN: 1932-6203
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  • 9
    Article
    Article
    Language: German
    In: CNE.fortbildung, 04/01/2014, Vol.08(02), pp.1-1
    ISSN: 2190-3034
    E-ISSN: 2196-9396
    Source: Thieme Publishing Group (via CrossRef)
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  • 10
    Article
    Article
    Language: English
    In: Communications in agricultural and applied biological sciences, 2011, Vol.76(2), pp.3-5
    Keywords: Carbon Cycle -- Physiology ; Plant Roots -- Metabolism ; Plants -- Metabolism
    ISSN: 1379-1176
    Source: MEDLINE/PubMed (U.S. National Library of Medicine)
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