Filippo Favilli

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The side effects of sulfonylurea and imidazolinone herbicides on plant-associated bacteria were investigated under pure culture conditions. Eighteen isolates, belonging to the genera Azotobacter, Azospirillum, Bacillus, Enterobacter Pseudomonas and Serratia, were exposed to four active compounds at concentration ranges similar to those in field soil. The(More)
The addition of pyrogenic carbon (C) in the soil is considered a potential strategy to achieve direct C sequestration and potential reduction of non-CO2 greenhouse gas emissions. In this paper, we investigated the long term effects of charcoal addition on C sequestration and soil physico-chemical properties by studying a series of abandoned charcoal hearths(More)
Due to the role of azotobacteria in nitrogen fixation and to their potential biotechnological applications, there is some challenge in developing an effective strategy for the selective isolation of these micro-organisms from soil. One hundred ninety-six Gram-negative strains were isolated from 35 soils sampled in central Italy, by using and comparing three(More)
Biochar composting experiments were performed to determine whether composting is a suitable method to accelerate biochar surface oxidation for increasing its reactivity. To assess the results, surface properties of Terra Preta (Brazil) and ancient charcoal pit (Northern Italy) biochars were additionally investigated. Calculation of O/C ratios by(More)
We investigated the effect of organic matter and weathering on the lability and solid phase speciation of heavy metals (Cd, Cr, Cu, Ni, Pb, Zn) in two contrasting subalpine regions in the Italian Alps. Cr, Ni and Cu could be linked to weathering. This was not the case for Pb. Since organic matter (OM) influences the solid phase speciation of heavy metals,(More)
The effect of air pollution on total phyllospheric microflora from two species of the epiphytic neotropical genus Tillandsia (Bromeliaceae) was studied by comparing unpolluted plants living in a forest (Escazú, San José) with polluted ones from an urban site of Costa Rica (San José city). Dilutions of homogenized leaf samples were plated on media suitable(More)
Sinorhizobium meliloti natural populations show a high level of genetic polymorphism possibly due to the presence of mobile genetic elements such as insertion sequences (IS), transposons, and bacterial mobile introns. The analysis of the DNA sequence polymorphism of the nod region of S. meliloti pSymA megaplasmid in an Italian isolate led to the discovery(More)
The results of a three year investigation on phyllospheric nitrogen fixation in Pinus nigra and Pseudotsuga menziesii growing in Central Italy are reported. The highest levels of nitrogen fixation in Pinus nigra and Pseudotsuga menziesii needles were reached during spring in three year old needles (from 6.1 to 7.6 and from 8.1 to 10.2 nmoles of N2 fixed h-1(More)