17 documents found, page 1 of 2
Spontaneous Flora as Reservoir for the Survival and Spread of the Almond Anthra...
Ramos, Madalena; Maurício, Rodrigo; Sousa, Vicelina; Talhinhas, PedroAlmond anthracnose, primarily caused by Colletotrichum godetiae, severely affects intensively irrigated almond orchards. This polyphagous pathogen is dispersed among plants by rain splashes. Consequently, weeds may contribute to the survival and dispersal of the inoculum during the almond tree’s dormant period. This study investigated how C. godetiae interacts with plants from various species in the spontaneous...
Bark-based biorefineries: anatomical and chemical characterization of the bark ...
Şen, Ali Umut; Simões, Rita; Yücedağ, Cengiz; Quilhó, Teresa; Sousa, Vicelina; Miranda, Isabel M.; Fernandes, Ângela; Pereira, HelenaThe detailed anatomical and chemical features of the bark from endemic Quercus vulcanica in Turkey are reported here for the first time and discussed in the perspective of integration into a bark-based biorefinery system. The bark of Q. vulcanica trees was collected and studied through observations using light and scanning electron microscopy, wet-chemical analysis, inorganic elemental and FTIR analyses, GC-MS ...
Halotolerant endophytes promote grapevine regrowth after salt-induced defoliation
Navarro-Torre, Salvadora; Ferrario, Sara; Caperta, Ana D.; Victorino, Gonçalo; Bailly, Marion; Sousa, Vicelina; Viegas, Wanda; Nogales, AmaiaSalinity is an important problem for agriculture in the Mediterranean area, and thus, it is essential to develop mitigation strategies to reduce its impact. The main objective of this study was to test the effectiveness of halotolerant plant growth-promoting bacteria (H-PGPB) in improving grapevine salt stress tolerance. Grapevines grafted onto a salt-sensitive rootstock were inoculated with a consortium of H-P...
O ataúde egípcio do Museu Arqueológico do Carmo: estudo material e técnico
Pombo Cardoso, Isabel; Quilhó, Teresa; Sousa, Vicelina; Santana de Sá, Sara; França de Sá, Susana; Martins, Vera; Pereira, Célia; Sousa, RogérioO estudo material e técnico do ataúde antropomórfico (Nº Inv. MAC/MUM.1) pertencente ao Museu Arqueológico do Carmo, em Lisboa, Portugal, realizado por uma equipa interdisciplinar procurou completar o estudo textual e iconográfico existente sobre o mesmo ataúde, bem como retificar e completar os dados de um outro estudo técnico parcial. De acordo com estudos anteriores o ataúde terá sido produzido entre a Época...
An Integrated Similarity Analysis of Anatomical and Physical Wood Properties of...
Bessa, Fernanda; Sousa, Vicelina; Quilhó, Teresa; Pereira, HelenaTropical species are highly valued timber sources showing a large diversity of wood characteristics. Since there are major concerns regarding the sustainability of these tropical species in many tropical regions, knowledge of the variability in wood properties is therefore a valuable tool to design targeted exploitation and to enlarge the wood resources base, namely by identifying alternatives for CITES-listed ...
Wood density and ring width in Quercus rotundifolia trees in southern Portugal
Sousa, Vicelina; Silva, Maria Emilia; Louzada, José Luís; Pereira, HelenaQuercus rotundifolia Lam., known as holm oak or evergreen oak, occurs naturally in the western Mediterranean region, mainly as part of the agroforestry or agrosilvopastoral systems in Portugal (“montado”) and Spain (“dehesa”), and is economically important for acorn production. Less attention has been given to Q. rotundifolia wood, and its density variability is not known, namely related to tree growth. The woo...
Quercus rotundifolia bark as a source of polar extracts: structural and chemica...
Sousa, Vicelina; Ferreira, Joana P.A.; Miranda, Isabel; Quilhó, Teresa; Pereira, HelenaQuercus rotundifolia bark was studied regarding anatomical, chemical, and antioxidant properties from trees in two sites in southern Portugal and are here reported for the first time. The general structure and anatomy of Q. rotundifolia bark showed a rhytidome with sequential undulated and anastomosed periderms with a small proportion of cork, while the phloem included broad rays with strong cell sclerification...
Variation of ring width and wood density in two unmanaged stands of the Mediter...
Sousa, Vicelina; Louzada, José Luís; Pereira, HelenaRing width and wood density variation were studied from pith-to-bark and along the stem in two naturally regenerated stands of Quercus faginea Lam. in Portugal. Ring width was significantly different between sites, in both heartwood and sapwood rings, ranging from 1.83 mm to 2.52 mm and from 0.77 mm to 2.11 mm, respectively. Wood density was significantly different between sites only in the heartwood, i.e., 914...
Chemical composition of barks from Quercus faginea trees and characterization o...
Ferreira, Joana P.A.; Miranda, Isabel; Sousa, Vicelina; Pereira, HelenaThe bark from Quercus faginea mature trees from two sites was chemically characterized for the first time. The barks showed the following composition: ash 14.6%, total extractives 13.2%, suberin 2.9% and lignin 28.2%. The polysaccharides were composed mainly of glucose and xylose (50.3% and 35.1% of all monosaccharides respectively) with 4.8% of uronic acids. The suberin composition was: ω-hydroxyacids 46.3% of...
Chemical characterization and extractives composition of heartwood and sapwood ...
Miranda, Isabel; Sousa, Vicelina; Ferreira, Joana; Pereira, HelenaHeartwood and sapwood of Quercus faginea were evaluated in relation to summative chemical composition and non-polar and polar extracts composition, including an assessment of antioxidant properties (DPPH and FRAP). Twenty trees from two sites in Portugal were analysed. Heartwood had approximately two times more solvent extractible compounds than sapwood (on average 19.0% and 9.5%). The lipophilic extractible co...