Xylem vulnerability to cavitation varies among poplar and willow clones and correlates with yield   总被引：1，自引：0，他引：1  

Cochard H  Casella E  Mencuccini M 《Tree physiology》2007,27(12):1761-1767

Xylem vulnerability to cavitation is a promising criterion for identifying trees with high drought tolerance, but traditional techniques for measuring cavitation resistance are unsuitable for screening large numbers of genotypes. We tested the potential of the new Cavitron technique for high throughput screening of cavitation resistance in five poplar (Populus spp.) and four willow (Salix spp.) clones. The Cavitron technique enabled the screening of three to four clones per day with sufficient accuracy to reveal significant differences between clones. Because intraspecific screening may be better carried out through the identification of correlated and more easily measured traits, we attempted to identify accessible parameters that correlate to cavitation resistance. Variability in vulnerability to cavitation across clones was poorly correlated with anatomical traits such as vessel diameter, vessel wall strength, wood density and fiber wall thickness; however, a striking correlation was established between cavitation resistance and aboveground biomass production, indicating a possible trade-off between xylem safety and growth potential.  相似文献   

Gene expression induced by chronic ozone in the Mediterranean shrub Phillyrea latifolia: analysis by cDNA-AFLP     

Paolacci AR  Miraldi C  Tanzarella OA  Badiani M  Porceddu E  Nali C  Lorenzini G  Ciaffi M 《Tree physiology》2007,27(11):1541-1550

Seedlings of Phillyrea latifolia L., a Mediterranean shrub, were exposed for 90 days to 110 nl l(-1) ozone (O(3)). Comparison of the cDNA-amplified fragment length polymorphism (cDNA-AFLP) patterns for treated and control plants allowed the identification and cloning of 88 differential sequences induced by O(3). The differential expression of 67 cloned sequences was further confirmed by RT-PCR. The functions of 36 cloned sequences, corresponding to seven of the twelve gene functional classes of Arabidopsis, were presumed on the basis of their homology with characterized gene sequences. Ozone induction of genes homologous to 24 of the clones has been reported in other plant species, whereas the induction of the 12 remaining sequences has not been observed before. Ozone activation of these newly identified genes could be a result of the chronic exposure to low O(3) concentration, because in most previous studies, acute treatments, involving high O(3) dosages, were applied. Possible roles of the cloned sequences in the response of P. latifolia to O(3) and other causes of oxidative stress are discussed.  相似文献   

Remote monitoring system as a tool for calving management in Mediterranean Buffalo heifers (Bubalus bubalis)     

Emanuela Rossi  Nicola Ferri  Martina Crociati  Maurizio Monaci  Giuseppe Stradaioli  Lakamy Sylla 《Reproduction in domestic animals》2020,55(12):1803-1807

Buffalo breeding is common in Southern Italy. Dystocia compromises dam's and newborn health and welfare. Difficult parturition could be solved through prompt calving assistance, even if the identification of the beginning of delivery is challenging. Herein, we aimed to evaluate a remote calving alarm system in 15 Mediterranean buffalo heifers. An intravaginal probe was placed close to the external cervical os once premonitory signs of delivery were observed. No vaginal discharge nor signs of discomfort were notified in the days following the insertion of the probe. Heifers calved from 48 to 72 hr after the alarm was activated. The system correctly warned the farm personnel at the beginning of stage II of parturition, except for 2 cases. In the former, the intravaginal probe was expelled but the poor carrier network coverage negatively affected phone's signal quality; in the latter, recurrent vaginal prolapse was responsible for non-retention of the probe. Overall median expulsive phase was 68 ± 8 min, while the expulsion of a female calf took 54 ± 22.0 min and 90 ± 34.0 min in males, with significant difference (p =.02). Deliveries were homogeneously distributed across a 24-hr interval. No retention of foetal membranes nor metritis was identified at postpartum clinical examination. The calving alarm system used in this work was well tolerated in buffalo heifers. The introduction of smart technology in buffalo farming could contribute to the overall farm net return by reducing calf losses, especially for calves born from sexed-sorted semen, and by increasing animal welfare through quick resolution of dystocia. Further studies will be necessary to evaluate the net return in buffalo farms which will implement a remote calving alarm system on a wider population.  相似文献   

Enlightened Mannhemia haemolytica lung inflammation in bovinized mice     

Fabio Franco Stellari  Sophia Lavrentiadou  Francesca Ruscitti  Sarah Jacca  Valentina Franceschi  Maurizio Civelli  Chiara Carnini  Gino Villetti  Gaetano Donofrio 《Veterinary research》2014,45(1):8

Polymorphonuclear cells diapedesis has an important contribution to the induced Mannhemia haemolytica (M. haemolytica) infection lung inflammation and IL-8 is the primary polymorphonuclear chemoattractant. Using a bovine IL-8/luciferase transiently transgenized mouse model, the orchestration among M. haemolytica, IL-8 promoter activation and neutrophilia was followed in real time by in vivo image analysis.  相似文献   

Landscape fragmentation,land-use legacy and propagule pressure promote plant invasion on coastal dunes: a patch-based approach     

Marco Malavasi  Marta Carboni  Maurizio Cutini  Maria L. Carranza  Alicia T. R. Acosta 《Landscape Ecology》2014,29(9):1541-1550

Coastal dunes and sand areas are reported to be among the habitats most invaded by alien species in Europe. Landscape pattern could be a significant driver in invasion processes in parallel with land-use legacy. Fragmentation of natural habitats combined with the availability of propagules from the surrounding matrix may enhance the invisibility of ecological communities. Based on multitemporal land cover maps (1954–2008) and a floristic database, we analyzed how habitat fragmentation, propagule pressure and land-use legacy have affected alien plants’ presence and richness on natural dune patches along the Lazio Coast (Central Italy). Floristic data were derived from an existing geo-database of random vegetation plots (64 m²). A set of landscape patch-based metrics, considered to be adequate proxies of the main processes affecting alien invasion and richness, was calculated. First, we fit a generalized linear model (GLM) with binomial errors to assess which landscape metrics are influencing patch invasion. Second, we extracted invaded patches and, with GLMs, we investigated how landscape metrics affect average alien species richness. Alien invasion and alien richness seem to be affected by different processes: although alien invasion of each patch is strongly associated with its land-use legacy, the richness of aliens is more affected by landscape fragmentation and by the propagule pressure to which patch is exposed. By integrating spatial and temporal landscape metrics with floristic data, we were able to disentangle the relations of landscape fragmentation, propagule pressure and land-use legacy with the presence and richness of alien plants. The methodological approach here adopted could be easily extended to other alien species and ecosystems, offering scientifically sound support to prevent the high economic costs derived from both the control and the eradication of aliens.  相似文献   

Consuming colonial nostalgia: The monumentalisation of historic hotels in urban South‐East Asia     

Maurizio Peleggi 《Asia Pacific viewpoint》2005,46(3):255-265

Abstract: This article examines the renovation and commercial re‐launch in the 1990s of some of the grand hotels built in South‐East Asia during the high colonial era (1880s–1910s) and their social construction as historic monuments. The analysis focuses on architectural enhancement and discursive authentication as the key practices whereby the semblance of historic authenticity is bestowed on these hotels and made available as nostalgia to consumers. The article also considers whether renovated colonial hotels should be regarded as sites of consumption or as emerging ‘mnemonic sites’, filling in the vacuum caused by the progressive obliteration of ‘mnemonic environments’ in South‐East Asia's urban landscape.  相似文献   

Genetic diversity in bread wheat, as revealed by coefficient of parentage and molecular markers, and its relationship to hybrid performance   总被引：2，自引：0，他引：2  

Maria Corbellini  Maurizio Perenzin  Monica Accerbi  Patrizia Vaccino  Basilio Borghi 《Euphytica》2002,123(2):273-285

Variable results have been obtained in different crop species using geneticsimilarity (GS) estimates based on molecular markers and coefficient ofparentage (COP) to predict heterosis.This study was designed: i) to assess the level of GS among 40 breadwheat (Triticum aestivum L.) cultivars selected in Central and SouthEurope; ii) to compare GS with COP; iii) to correlate the estimates ofparental diversity with the heterotic effects detected on 149 F₁hybrids obtained by crossing the 40 cultivars according to three matingdesigns.The parental cultivars and the F₁ hybrids were grown in severallocations at normal seed density. Significant heterotic effects were detectedfor grain yield and other traits including quality attributes. The parentalcultivars were assayed for DNA polymorphisms using two classes ofmarkers: 338 RFLP and 200 AFLP^® bands were scored. GS estimates werecomputed considering each molecular marker set separately (GS_RFLP,GS_AFLP) and together (GS_TOT). Ample differentiation amongthe parental cultivars was detected with the two marker sets. Although theaverage GS_TOT (0.43) was higher than COP (0.10), the twomeasurements were significantly correlated (r = 0.36, p < 0.01).Correlations between the different estimates of genetic diversity andF₁ performance or mid parent heterosis for grain yield and otherrelated traits were in general low although statistically significant.A more detailed analysis was conducted on 28 F₁ hybridsproduced in a half diallel cross of eight parental cultivars characterized byhigh heterotic effects for grain yield. The GS estimates based on RFLP,AFLP^® markers and also on RAPD were partitioned into general andspecific components. Correlations with general and specific combiningability effects for the measured traits were in several cases statisticallysignificant but too low to be predictive and therefore exploitable in practicalbreeding.  相似文献   

Application of a low-cost RGB sensor to detect basil (Ocimum basilicum L.) nutritional status at pilot scale level     

Brambilla  Massimo  Romano  Elio  Buccheri  Marina  Cutini  Maurizio  Toscano  Pietro  Cacini  Sonia  Massa  Daniele  Ferri  Serena  Monarca  Danilo  Fedrizzi  Marco  Burchi  Gianluca  Bisaglia  Carlo 《Precision Agriculture》2021,22(3):734-753

Precision Agriculture - In this work, basil plants were fertilized with 0, 2.5&nbsp;mM and 10&nbsp;mM nitrogen (with different NO3?/NH4+ ratios), and then monitored using a low-power...  相似文献   

Soil carbon stock in olive groves agroforestry systems under different management and soil characteristics     

Bateni  Camilla  Ventura  Maurizio  Tonon  Giustino  Pisanelli  Andrea 《Agroforestry Systems》2021,95(5):951-961

The atmospheric concentrations of greenhouse gases have increased to unprecedented levels during last decades, raising concerns about their effect on climate change. Agriculture and land use change play an important role in atmospheric CO₂ emission and fixation, especially by affecting the soil carbon (C) storage. In this context, agroforestry systems (AFSs) could play an important role contributing to climate change mitigation. Given the importance of olive cultivation in the Mediterranean region, it is important to investigate soil C stock in olive groves, and to assess which agronomic practices could improve the soil C stock in these systems. For this reason, a study was conducted in different olive groves, including conventional and organic management, and a typical silvopastoral AFS. Furthermore, an abandoned olive grove and nearby forest were examined as a comparison. Soil samples were collected in each farm and analysed for C content and physico-chemical characteristics. This study indicates that, irrespective of the management, olive groves in the Umbria region of Italy are characterised by a high level of soil C stock if compared to those growing in other areas and to forest ecosystems, indicating that the practices adopted in the area are not negatively affecting soil C storage. A slightly lower soil C stock was measured in the silvopastoral AFS in comparison to the other farms, while high soil C stock was associated with the use of pomace, suggesting that this practice can be used to further increase soil C stock in olive orchards.

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