Sobre as comunidades de Pterospartum tridentatum sensu lato em Portugal continental

FRANCO (1971) aquando da publicação da Nova Flora de Portugal só considerou ocorrer no território nacional Pterospartum tridentatum (L.) Willk., sob o nome de Chamaespartium tridentatum (L.) P. Gibbs, contudo TALAVERA (1999), na Flora Ibérica, considerou que esta espécie era constituída por três subespécies: Pterospartum tridentatum subsp. tridentatum, Pterospartum tridentatum subsp. cantabricum (Spach) Talavera & P. Gibbs, Pterospartum tridentatum subsp. lasianthum (Spach) Talavera & P. Gibbs, que posteriormente RIVAS-MARTÍNEZ et al. (2002) reputaram serem espécies independentes. Com esta nota pretendemos esclarecer as comunidades em que estes táxones desempenham um papel importante em Portugal continental

Cork oak forests soil bacteria: potential for sustainable agroforest production

Plant growth promoting rhizobacteria (PGPR) are in increasing demand due to their role in promoting sustainable practices, not only in agriculture but also in forestry. Keeping in mind the future application of PGPR for increasing cork oak sustainability, the aim of this study was to find cork oak PGPR isolates with increased nutrient solubilisation traits, able to promote root morphological changes and/or antagonize cork oak bark phytopathogens. Soils from three cork oak forests with distinct bioclimates (humid, semi-humid and semi-arid) were used for isolating bacteria. From the 7634 colony-forming units, 323 bacterial isolates were biochemically assayed for PGPR traits (siderophores production, phosphate solubilizing and organic acids production), and 51 were found to display all these traits. These PGPR were able to induce root morphological changes on Arabidopsis thaliana, like suppression of primary root growth, increase of lateral roots or root hairs formation. However, the most proficient PGPR displayed specific ability in changing a single root morphological trait. This ability was related not only to bacterial genotype, but also with the environment where bacteria thrived and isolation temperature. Bacteria from semi-arid environments (mainly Bacillus megaterium isolates) could hold a promising tool to enhance plant development. Other isolates (Serratia quinivorens or B. cereus) could be further explored for biocontrol purposes.This work was supported by FEDER funds through COMPETE (Programa Operacional Factores de Competitividade) and by national funds by FCT (Fundação para a Ciência e a Tecnologia) in the framework of the projects SuberControl (PTDC/ASP-SIL/28635/2017), BioISI (UIDB/04046/2020) and CIMO (UIDB/00690/2020)

A crítica nietzschiana à noção de sujeito e o problema da falência da moral ocidental

O objetivo deste artigo é tentar esclarecer de que forma a crítica nietzschiana à categoria de sujeito provoca abalos nas estruturas fundamentais do pensamento moral ocidental. Para tal, dividimos este trabalho em dois momentos. No primeiro, buscamos compreender o raciocínio que levou Descartes da dúvida metódica até a certeza indubitável do cogito ergo sum. Num segundo momento, passamos ao confronto de Nietzsche versus Descartes. Nesta etapa, examinamos, primeiramente, a crítica que o filósofo do martelo direciona ao argumento do cogito cartesiano, quando ele lança mão de uma espécie de “filosofia da linguagem” para refutar as teses do filósofo francês. Posteriormente, analisamos a doutrina nietzschiana da vontade de potência como uma alternativa, proposta por Nietzsche, à metafísica do sujeito. Por fim, propomos uma reflexão acerca das consequências éticas decorrentes do esfacelamento teórico do “sujeito”

From Closed-Loop to Sustainable Supply Chains: The WEEE case

The primary objective of closed-loop supply chains (CLSC) is to reap the maximum economic benefit from end-of-use products. Nevertheless, literature within this stream of research advocates that closing the loop helps to mitigate the undesirable footprint of supply chains. In this paper we assess the magnitude of such environmental gains for Electric and Electronic Equipments (EEE), based on a single environmental metric of Cumulative Energy Demand. We detail our analysis for the different phases of the CLSC, i.e. manufacturing, usage, transportation and end-of-life activities. According to our literature review, within the same group of EEE, results greatly vary. Furthermore, based on the environmental hot-spots, we propose extensions of the existing CLSC models to incorporate the CED

A Methodology for Assessing Eco-efficiency in Logistics Networks

Recent literature on sustainable logistics networks points to two important questions: (i) How to spot the preferred solution(s) balancing environmental and business concerns? (ii) How to improve the understanding of the trade-offs between these two dimensions? We posit that a complete exploration of the efficient frontier and trade-offs between profitability and environmental impacts are particularly suitable to answer these two questions. In order to deal with the exponential number of basic efficient points in the frontier, we propose a formulation that performs in exponential time for the number of objective functions only. We illustrate our findings by designing a complex recycling logistics network in Germany

Low Bone Mass Density Is Associated With Hemolysis In Brazilian Patients With Sickle Cell Disease.

To determine whether kidney disease and hemolysis are associated with bone mass density in a population of adult Brazilian patients with sickle cell disease. Bone involvement is a frequent clinical manifestation of sickle cell disease, and it has multiple causes; however, there are few consistent clinical associations between bone involvement and sickle cell disease. Patients over 20 years of age with sickle cell disease who were regularly followed at the Hematology and Hemotherapy Center of Campinas, Brazil, were sorted into three groups, including those with normal bone mass density, those with osteopenia, and those with osteoporosis, according to the World Health Organization criteria. The clinical data of the patients were compared using statistical analyses. In total, 65 patients were included in this study: 12 (18.5%) with normal bone mass density, 37 (57%) with osteopenia and 16 (24.5%) with osteoporosis. Overall, 53 patients (81.5%) had bone mass densities below normal standards. Osteopenia and osteoporosis patients had increased lactate dehydrogenase levels and reticulocyte counts compared to patients with normal bone mass density (p<0.05). Osteoporosis patients also had decreased hemoglobin levels (p<0.05). Hemolysis was significantly increased in patients with osteoporosis compared with patients with osteopenia, as indicated by increased lactate dehydrogenase levels and reticulocyte counts as well as decreased hemoglobin levels. Osteoporosis patients were older, with lower glomerular filtration rates than patients with osteopenia. There was no significant difference between the groups with regard to gender, body mass index, serum creatinine levels, estimated creatinine clearance, or microalbuminuria. A high prevalence of reduced bone mass density that was associated with hemolysis was found in this population, as indicated by the high lactate dehydrogenase levels, increased reticulocyte counts and low hemoglobin levels.66801-

Diversity of fungal endophytic community in Quercus suber L. and detection of opportunistic phytopathogenic fungi

Cork oak (Quercus suber L.) is a species of high ecological importance in Mediterranean Basin and has high relevance for Portuguese economy due to cork production and processing. The sustainability of cork oak is currently being threatened by the reduction of water availability that would increase the occurrence of diseases. Charcoal disease, caused by the fungus Biscogniauxia mediterrânea, leads to the death of the tree. Diplodia corticola is involved in various diseases considered responsible for the decline of cork oak in Mediterranean Basin. To identify endophytic fungi in cork oak, including these opportunistic pathogens, four sites of continental Portugal (Bragança, Geres, Alcobaça and Grândola) with differences in water availability were selected to carry out the collection of biological material. The community of fungal endophytes of leaves, stems and roots was evaluated. The roots displayed a more diverse fungal community than the aboveground organs. Although no disease symptoms were detected in studied cork oaks, the referred pathogenic fungi were essentially affecting stems and leaves. In general, Grândola presented the highest colonization frequency and diversity of endophytes, while Alcobaça had the lowest. From all studied sites, cork oaks from Geres showed the most distinct community and did not present those pathogens. D. corticola only infected southern regions, while S. mediterrânea also infected trees in Bragança. The exclusive presence of both pathogens in aboveground organs and the absence of visible disease symptoms in all studied cork oaks encourage the searching of adequate biocontrol agents from the endophytic community for restricting these diseases in cork oak.This research was financially supported by National Funds by FCT - Portuguese Foundation for Science and Technology, under the project UID/Multi/04046/2013. Daniela Costa was supported by FCT, grant reference SFRH/BD/120516/2016, and the Doctoral Programme "Agricultural Production Chains - from fork to farm" (PD/00122/2012).info:eu-repo/semantics/publishedVersio

Screening of antagonistic fungal agents for biological control of Quercus suber diseases

Cork oak (Quercus suber L.) is an evergreen tree species, typically found throughout the Mediterranean Basin, displaying a great economic and ecological importance. Several diseases are currently affecting cork oaks compromising cork production, including those caused by Diplodia corticola and Biscogniauxia mediterranea pathogens. The incidence of both diseases seems to increase when trees are affected by several environmental stresses, in particular drought stress. Given the predicted climate changes, the future cork oak productivity could be drastically threatened by these pathogens. Fungicides are until now the only technique used for the treatment of such diseases, but can lead to environmental hazards and toxicity. The use of beneficial plant–microorganism interactions, like plant-endophyte symbiosis, could be a promising strategy for coping with such adverse conditions, since they may stimulate plant growth and enhance tolerance to disease causal agents and drought. The collection and identification of endophytic fungi in cork oak was performed in sites with differences in water availability. Antagonist assays were performed in dual culture to identify the fungal agents most promising to the biological control of these diseases.info:eu-repo/semantics/publishedVersio