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Kersebaum, K.C. |
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Title |
Effects of climate change and elevated CO2 on wheat water consumption, yield and water footprint in three contrasting regions of Germany |
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Journal Article |
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Year |
2015 |
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Italian Journal of Agrometeorology |
Abbreviated Journal |
Italian Journal of Agrometeorology |
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Si |
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117-122 |
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2016-10-31 |
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CropM, ft_macsur |
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MA @ admin @ |
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4791 |
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Author |
Comadira, G.; Rasool, B.; Karpinska, B.; Morris, J.; Verrall, S.R.; Hedley, P.E.; Foyer, C.H.; Hancock, R.D. |
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Title |
Nitrogen deficiency in barley (Hordeum vulgare) seedlings induces molecular and metabolic adjustments that trigger aphid resistance |
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Journal Article |
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Year |
2015 |
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Journal of Experimental Botany |
Abbreviated Journal |
J. Experim. Bot. |
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Volume |
66 |
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12 |
Pages |
3639-3655 |
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Keywords |
Animals; Aphids/drug effects/*physiology; Biomass; Carbon/pharmacology; Chlorophyll/metabolism; Cluster Analysis; *Disease Resistance/drug effects; Gases/metabolism; Gene Expression Regulation, Plant/drug effects; Hordeum/drug effects/genetics/*parasitology; Nitrogen/*deficiency/metabolism/pharmacology; Oxidation-Reduction/drug effects; Photosynthesis/drug effects; Plant Diseases/genetics/*parasitology; Plant Leaves/drug effects/genetics/metabolism; Plant Proteins/genetics/metabolism; Plant Shoots/drug effects/metabolism; RNA, Messenger/genetics/metabolism; Secondary Metabolism/drug effects; Seedlings/drug effects/*metabolism/*parasitology; Signal Transduction/drug effects; Thylakoids/drug effects/metabolism/parasitology; Transcription Factors/metabolism; Transcriptome/genetics; Cross-tolerance; Myzus persicae; kinase cascades; metabolite profiles; nitrogen limitation; oxidative stress; sugar signalling |
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Abstract |
Agricultural nitrous oxide (N2O) pollution resulting from the use of synthetic fertilizers represents a significant contribution to anthropogenic greenhouse gas emissions, providing a rationale for reduced use of nitrogen (N) fertilizers. Nitrogen limitation results in extensive systems rebalancing that remodels metabolism and defence processes. To analyse the regulation underpinning these responses, barley (Horedeum vulgare) seedlings were grown for 7 d under N-deficient conditions until net photosynthesis was 50% lower than in N-replete controls. Although shoot growth was decreased there was no evidence for the induction of oxidative stress despite lower total concentrations of N-containing antioxidants. Nitrogen-deficient barley leaves were rich in amino acids, sugars and tricarboxylic acid cycle intermediates. In contrast to N-replete leaves one-day-old nymphs of the green peach aphid (Myzus persicae) failed to reach adulthood when transferred to N-deficient barley leaves. Transcripts encoding cell, sugar and nutrient signalling, protein degradation and secondary metabolism were over-represented in N-deficient leaves while those associated with hormone metabolism were similar under both nutrient regimes with the exception of mRNAs encoding proteins involved in auxin metabolism and responses. Significant similarities were observed between the N-limited barley leaf transcriptome and that of aphid-infested Arabidopsis leaves. These findings not only highlight significant similarities between biotic and abiotic stress signalling cascades but also identify potential targets for increasing aphid resistance with implications for the development of sustainable agriculture. |
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2016-10-31 |
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0022-0957 1460-2431 |
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CropM |
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MA @ admin @ |
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4787 |
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Author |
Palatnik, R.R. |
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Title |
Economic Impacts Of Water Scarcity Under Diverse Water Salinities |
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2015 |
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TradeM |
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Annual Conference of the European Association of Environmental, and Resource Economists EAERE 21, Helsinki, Finland, 2015-06-24 to 2015-06-27 |
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Call Number |
MA @ admin @ |
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2702 |
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Author |
Palatnik, R.R. |
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Title |
Economic Impacts Of Water Scarcity Under Diverse Water Salinities |
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Conference Article |
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2015 |
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TradeM |
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TradeM International Workshop, Securing Food Using Non-Conventional Water Sources, 2015-02-24 to 2015-02-24 |
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MA @ admin @ |
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2703 |
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Author |
Özkan, S.; Østergaard, S.; Strøm, T. |
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Title |
Modelling The Impact Of Diseases On Greenhouse Gas Emissions In Dairy Cows |
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2015 |
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LiveM |
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Animal Health & Greenhouse Gas Emissions Intensity Network 2nd meeting, Montpellier, France, 2015-03-15 to 2015-03-15 |
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MA @ admin @ |
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2698 |
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