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Castro G.,Cra Unita Of Ricerca Per Le Produzioni Legnose Fuori Foresta | Berti S.,C.N.R. IVALSA | Pisano M.,Instituto Superiore A Sobrero
European Journal of Wood and Wood Products | Year: 2014

The authors studied the variability of mechanical properties and density within poplar wood veneer. Determinations (EN 310 1993) were done using a tensometer particularly suitable for test pieces of small dimensions, by means of a 100 daN load cell. The bending test method developed seems to be able to provide reliable results, that confirmed the expected strong influence of the ring portions on both density and MOR (latewood being of course heavier and stronger), a difference which seems, however, less noticeable in false heartwood. © 2014, Springer-Verlag Berlin Heidelberg.

Bonadei M.,University of Pavia | Zelasco S.,Istituto Sperimentale Per l'Olivicoltura | Giorcelli A.,Cra Unita Of Ricerca Per Le Produzioni Legnose Fuori Foresta | Gennaro M.,Cra Unita Of Ricerca Per Le Produzioni Legnose Fuori Foresta | And 4 more authors.
Plant Biosystems | Year: 2012

An experimental trial was established in greenhouse with transgenic white poplars from an elite genotype (Populus alba L. cv "Villafranca") expressing the bar gene for tolerance to Basta® herbicide. The steady-state level of bar mRNA was evaluated in different seasons, over a two-year period. Notwithstanding the presence of the 35SCaMV promoter, significant fluctuations in the amount of the bar transcript in relation to season and organ position were observed. The highest expression levels were reached in apical leaves in summer, while a consistent drop in transgene expression occurred at the onset of dormancy and in winter buds. A similar expression pattern was evidenced for the poUBI gene used as endogenous marker. The genetically modified poplars were tolerant to intense and repeated glufosinate ammonium treatments, maintaining an intact shoot sprouting and a good height increment. © 2012 Copyright Taylor and Francis Group, LLC.

Lingua G.,University of Piemonte Orientale | Copetta A.,University of Piemonte Orientale | Copetta A.,Mybasol S.r.l. | Copetta A.,Cra Unita Of Ricerca Per Le Produzioni Legnose Fuori Foresta | And 9 more authors.
Environmental Science and Pollution Research | Year: 2015

High nitrogen concentration in wastewaters requires treatments to prevent the risks of eutrophication in rivers, lakes and coastal waters. The use of constructed wetlands is one of the possible approaches to lower nitrate concentration in wastewaters. Beyond supporting the growth of the bacteria operating denitrification, plants can directly take up nitrogen. Since plant roots interact with a number of soil microorganisms, in the present work we report the monitoring of nitrate concentration in macrocosms with four different levels of added nitrate (0, 30, 60 and 90 mg l−1), using Phragmites australis, inoculated with bacteria or arbuscular mycorrhizal fungi, to assess whether the use of such inocula could improve wastewater denitrification. Higher potassium nitrate concentration increased plant growth and inoculation with arbuscular mycorrhizal fungi or bacteria resulted in larger plants with more developed root systems. In the case of plants inoculated with arbuscular mycorrhizal fungi, a faster decrease of nitrate concentration was observed, while the N%/C% ratio of the plants of the different treatments remained similar. At 90 mg l−1 of added nitrate, only mycorrhizal plants were able to decrease nitrate concentration to the limits prescribed by the Italian law. These data suggest that mycorrhizal and microbial inoculation can be an additional tool to improve the efficiency of denitrification in the treatment of wastewaters via constructed wetlands. © 2015, Springer-Verlag Berlin Heidelberg.

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