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Sökning: WFRF:(Máguas Cristina)

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1.
  • Barredo, José I., et al. (författare)
  • Mapping and assessment of forest ecosystems and their services : Applications and guidance for decision making in the framework of MAES
  • 2015
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • The aim of this report is to illustrate by means of a series of case studies the implementation of mapping and assessment of forest ecosystem services in different contexts and geographical levels. Methodological aspects, data issues, approaches, limitations, gaps and further steps for improvement are analysed for providing good practices and decision making guidance. The EU initiative on Mappingand Assessment of Ecosystems and their Services (MAES), with the support of all Member States, contributes to improve the knowledge on ecosystem services. MAES is one of the building-block initiatives supporting the EU Biodiversity Strategy to 2020.
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2.
  • Duro, Nuno, et al. (författare)
  • The impact of salinity on the symbiosis between Casuarina glauca Sieb. ex Spreng. and N-2-fixing Frankia bacteria based on the analysis of Nitrogen and Carbon metabolism
  • 2016
  • Ingår i: Plant and Soil. - : Springer Science and Business Media LLC. - 0032-079X .- 1573-5036. ; 398:1-2, s. 327-337
  • Tidskriftsartikel (refereegranskat)abstract
    • Casuarina glauca is an actinorhizal plant that establishes root-nodule symbiosis with N-2-fixing bacteria of the genus Frankia. This plant is highly recalcitrant to extreme environmental conditions such as salinity and drought. The aim of this study was to evaluate the impact of salt stress on the symbiotic relationship between C. glauca and Frankia Thr, focusing on N and C metabolism. Symbiotic and non-symbiotic plants were exposed to 0, 200, 400 and 600 mM NaCl. The following analyses were performed: stable carbon (delta C-13) and nitrogen (delta N-15) isotope signature; nitrogenase activity in nodules (acetylene reduction assay); and gene expression of a set of genes involved in nodule infection and N/C metabolism (qRT-PCR). Data were analysed using two-way ANOVA. Salt stress induced an enrichment in delta C-13 and delta N-15, reflecting a negative impact of salt in the relative water content and N-2 fixation, respectively. Furthermore, nitrogenase activity in nodules was insignificant already at 200 mM NaCl, consistent with the expression patterns of nifH as well as of plant genes involved in nodule induction and metabolism. The ability of C. glauca to thrive under highly saline environments is not dependent on the symbiosis with Frankia.
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