<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Andreetta, Anna</style></author><author><style face="normal" font="default" size="100%">Dignac, Marie-France</style></author><author><style face="normal" font="default" size="100%">Carnicelli, Stefano</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Biological and physico-chemical processes influence cutin and suberin biomarker distribution in two Mediterranean forest soil profiles</style></title><secondary-title><style face="normal" font="default" size="100%">Biogeochemistry</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Cutins</style></keyword><keyword><style  face="normal" font="default" size="100%">Forest soils</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean</style></keyword><keyword><style  face="normal" font="default" size="100%">Soil organic matter</style></keyword><keyword><style  face="normal" font="default" size="100%">Suberins</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2011///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.springerlink.com/index/10.1007/s10533-011-9693-9</style></url></web-urls></urls><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Recent investigations have shown macromolecules, such as cutins, and suberins as effective markers for above and belowground plant tissues. These biopolyesters contain structural units speciﬁc for different litter components and for root biomass. The aim of this work was to understand the fate of plant organic matter (OM) in Mediterranean forest soils by evaluating the incorporation of cutin and suberin by measuring speciﬁc biomarkers. Soil and plant tissue (leaves, woods and roots) samples were collected in two mixed Mediterranean forests of Quercus ilex (holm oak) in costal stands in Tuscany (central Italy), which have different ecological and edaphic features. Ester-bound lipids of mineral and organic horizons and the overlying vegetation were analysed using the saponiﬁcation method in order to depolymerise cutins and suberins and release their speciﬁc structural units. Cutin and suberin speciﬁc aliphatic monomers were identiﬁed and quantiﬁed by gas chromatographic techniques. The distribution of cutin and suberin speciﬁc monomers in plant tissue suggested that mid-chain hydroxy acids can be used as leaf-speciﬁc markers and a,x-alkanedioic acids and xC18:1 as root-speciﬁc markers. Differences in the distributions of biomarkers speciﬁc for above and belowground plant-derived OM was observed in the two types of soils, suggesting contrasted degradation, stabilisation and transport mechanisms that may be related to soil physico-chemical properties. The acidic and dry soil appeared to inhibit microbial activity, favouring stabilization of leaf-derived compounds, while, in the more fertile soil, protection within aggregates appeared to better preserve root-derived compounds.</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Andreetta, Anna</style></author><author><style face="normal" font="default" size="100%">Macci, Cristina</style></author><author><style face="normal" font="default" size="100%">Ceccherini, Maria Teresa</style></author><author><style face="normal" font="default" size="100%">Cecchini, Guia</style></author><author><style face="normal" font="default" size="100%">Masciandaro, Graziana</style></author><author><style face="normal" font="default" size="100%">Pietramellara, Giacomo</style></author><author><style face="normal" font="default" size="100%">Carnicelli, Stefano</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Microbial dynamics in Mediterranean Moder humus</style></title><secondary-title><style face="normal" font="default" size="100%">Biology and Fertility of Soils</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">activities</style></keyword><keyword><style  face="normal" font="default" size="100%">dgge</style></keyword><keyword><style  face="normal" font="default" size="100%">enzyme</style></keyword><keyword><style  face="normal" font="default" size="100%">humus</style></keyword><keyword><style  face="normal" font="default" size="100%">mediterranean forest soils</style></keyword><keyword><style  face="normal" font="default" size="100%">soil microbial communities</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2011///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.springerlink.com/index/10.1007/s00374-011-0622-9</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">48</style></volume><pages><style face="normal" font="default" size="100%">259 - 270</style></pages><isbn><style face="normal" font="default" size="100%">0037401106</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">There is a growing interest in the links between humus forms and soil biota, and little is known about these links in Mediterranean ecosystems. Culture-independent techniques, such as DNA extraction followed by DGGE and enzyme activities, allowed us to compare microbial communities in two horizons of a forest soil in different seasonal conditions. Direct in situ lysis was applied for extraction of DNA from soil; intracellular DNAwas separated from extracellular and used to represent the composition of microflora. The aims were to describe how biochemical and microbiological parameters correlate with topsoil properties in typical Mediterranean Moder humus. Changes in bacterial and fungal community composition were evident from DGGE profiles. Degrees of similarity and clustering correlation coefficients showed that the seasonal conditions may affect the composition and activity of bacterial and fungal communities in the OH horizon, while in the E horizon the two communities were hardly modified. In the same season, OH and E horizons showed a different composition of bacterial and fungal communities and different enzyme activities, suggesting similar behaviour of eubacteria and fungi relatively to all the variables analysed. Evidently, different organic carbon content in soil horizons influenced microflora composition and microbial activities involved in the P and N cycles.</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Andreetta, Anna</style></author><author><style face="normal" font="default" size="100%">Ciampalini, Rossano</style></author><author><style face="normal" font="default" size="100%">Moretti, Pierpaolo</style></author><author><style face="normal" font="default" size="100%">Vingiani, Simona</style></author><author><style face="normal" font="default" size="100%">Poggio, Giorgio</style></author><author><style face="normal" font="default" size="100%">Matteucci, Giorgio</style></author><author><style face="normal" font="default" size="100%">Tescari, Francesca</style></author><author><style face="normal" font="default" size="100%">Carnicelli, Stefano</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Forest humus forms as potential indicators of soil carbon storage in Mediterranean environments</style></title><secondary-title><style face="normal" font="default" size="100%">Biology and Fertility of Soils</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">carbon pools</style></keyword><keyword><style  face="normal" font="default" size="100%">Carbon Sequestration</style></keyword><keyword><style  face="normal" font="default" size="100%">humus forms</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean forests</style></keyword><keyword><style  face="normal" font="default" size="100%">stabilization</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2010///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.springerlink.com/index/10.1007/s00374-010-0499-z</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">47</style></volume><pages><style face="normal" font="default" size="100%">31 - 40</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The aim of this work was to investigate the potential of forest humus forms as indicators of soil C storage. To this purpose, Mediterranean forest soils in Southern and Central Italy were examined. Sites differed for elevation, climate, parent material and vegetation conditions, while summer drought was the common ecological factor. A morpho-functional criterion, based on holorganic layers thickness and A horizon properties, was used to classify humus forms, which ranged from Dysmoder to Eumull. Such variability allowed understanding of factors influencing organic matter storage. The relations between carbon stock and humus form were investigated for the topsoil layer (0–20 cm), which was supposed to contain the soil C pools most sensitive to climate change. We found that humus forms can be grouped in statistically different populations, with respect to topsoil C stocks. The use of A horizon structure was the main diagnostic criterion and represented the most effective approach to humus classification in Mediterranean conditions. It appears that humus forms have a clear potential as indicators of organic carbon status in Mediterranean forest soils.</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue></record></records></xml>