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Oxidative stress in a semi-natural grassland community grown in mini-FACE rings under elevated CO2
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Antioxidant status in herbaceous plants growing under elevated CO2 in mini-FACE rings
No full textHere we present studies on the antioxidant status of a semi-natural grassland community, permanently
growing in mini-FACE rings under elevated concentrations of atmospheric CO2
(560μmol mol–1). In general, in leaves of Dactylis glomerata L. and Trifolium repens L., no differences
between ambient and elevated CO2 were detected as concerns protein content, activity of oxidantscavenging
enzymes (catalase, superoxide dismutase, ascorbate peroxidase and guaiacol peroxidase),
and lipid peroxidation. The activity of antioxidant-regenerating enzymes (monodehydroascorbate
reductase, dehydroascorbate reductase and glutathione disulfide reductase) and the content of
antioxidants (ascorbic acid, dehydroascorbic acid, reduced glutathione and glutathione disulfide)
showed remarkable variability between leaves from plants grown in ambient and CO2-enriched mini-
FACE rings. Thus, in general it can be concluded that the effects of elevated CO2 at environmentally
relevant concentrations on the leaf antioxidant status of a grassland community are extremely variable,
species-specific and rather limited
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Foliar responses of olive trees (Olea europaea L.) Under field exposure to elevated CO2 concentration
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Ecotypic variation of xylem embolism, phenological traits, growth parameters and allozyme characteristics in Fagus sylvatica
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Valutazione ed applicazione della chirurgia rigenerativa ossea; proposta di un protocollo clinico-chirurgico per uno studio “in vivo”
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