Universidade Federal Rural de Pernambuco

Genome characterization of a begomovirus isolated from Brazilian Carica papaya plants

Abstract Papaya ( Carica papaya L.) plants are susceptible to several viral pathogens. However, information regarding papaya-associated DNA viruses in Latin America is limited. In this study, we collected symptomatic papaya plants in Baraúna, Rio Grande do Norte, Brazil, and scre...

Racial and Socioeconomic Inequities in COVID-19 In-Hospital Mortality in Brazil in the Post-Emergency Era: A National Cohort Study of 19,718 Hospitalized Adults in 2024

Abstract Background In 2024, COVID-19 entered a post-emergency phase, but in-hospital mortality remains a relevant public health concern in Brazil. As population immunity, vaccination, and clinical management evolved, the hierarchy of mortality predictors may have shifted from tr...

Human dimensions of protected areas: a systematic review of the social-ecological effects of legal restrictions on local communities

Legal restrictions associated with protected areas can act as anthropogenic disturbances in social-ecological systems, altering relationships among communities, territories, and resources. This study examined how the scientific literature documents these effects by investigating...

Chemical Fingerprinting for Authentication and Compositional Characterization of Cocos nucifera Bee Pollen

Abstract Bee pollen produced by Apis mellifera is formed by the agglutination of floral pollen grains with nectar and bee secretions. Monofloral or dominant bee pollen generally exhibits a more consistent chemical composition and quality. In this study, coconut (Cocos nucifera) b...

Pulsed drip irrigation modulates the photosynthetic responses of melon plants to abiotic stresses

Pulsed drip irrigation has been highlighted as a strategy to mitigate limitations associated with water and saline stress. This study was conducted to analyze whether pulsed drip irrigation modulates photosynthetic and water-related responses in melon plants subjected to combined...

Predicting barrier-fluid failure for temporary abandonment of petroleum wells with a tabular foundation model

Temporary well abandonment may rely on liquid barrier fluids that must retain integrity under temperature–time exposure. It was evaluated whether supervised learning can predict barrier-fluid failure from routine laboratory measurements (pH, density, apparent viscosity) obtained...

Feminist Research Praxis in the Making: The Agroecological Logbooks in Bahia, Brazil

Science and Technology Studies has challenged the binary between scientific and nonscientific knowledge, exposing how epistemic practices are deeply entangled, including in fields like agriculture and development. This binary has historically underwritten colonial exclusion and b...

Biomass Valorization Through Applications in the Continuous Removal of Iron from Water: Batch Equilibrium and Fixed-Bed Adsorption

Iron is one of the most common constituents in groundwater, and affordable decentralized options for removing residual iron remain limited. This study valorizes two abundant agro-industrial residues, sugarcane bagasse and green coconut mesocarp, as biosorbents for removing residu...

Proposal for a new standard area diagram to quantify the severity of orange rust in sugarcane

Orange rust (Puccinia kuehnii), a fungal disease of major concern in the sugarcane industry, can reduce the productivity of susceptible sugarcane varieties by up to 50% in many sugarcane-producing countries. The use of a standard area diagram (SAD) enhances the assessment of rust...

Genesis and properties of representative Ferralsols from the Brazilian Cerrado of Piauí

Abstract Ferralsols cover substantial areas in tropical regions, yet their pedogenesis on sedimentary rocks remains insufficiently understood. This study aimed to characterize the morphological, physical, chemical, and mineralogical properties of five representative sandy-texture...

Postharvest Quality and Functional Stability of White-Fleshed Sweet Potatoes with Cactus Mucilage Coatings and Packaging

Abstract Edible coatings based on plant-derived biopolymers are promising tools to preserve the functional quality of fresh foods. Sweet potato is considered a functional food due to its bioactive compound content, although these attributes may be compromised during postharvest s...

Seasonality and functional traits of periphytic algae shape zooperiphyton colonization

Abstract We investigated the influence of seasonality and the phycoperiphyton on the colonization dynamics of zooperiphyton on artificial polyethylene terephthalate substrates in a tropical hypereutrophic reservoir. We tested the hypothesis that seasonal climatic conditions drive...

The impact of climate and habitat on body shape and size evolution in charontid whip spiders

Abstract Environmental shifts often dictate Arthropod morphological evolution, yet certain lineages maintain remarkably conserved body plans across diverse habitats. Whip spiders (Amblypygi) emerged over 300 Ma and exhibit striking morphological conservatism; nonetheless, what dr...

The lower deciduous dentition of protodidelphids (Mammalia, Marsupialia) from the Itaboraí Basin (lower Eocene), Brazil, and the validity of “ Riolestes capricornicus ” (Goin et al., 2009)

Abstract The Itaboraí Basin, Southeastern Brazil, preserved one of the most diverse mammalian faunas from the Paleogene, with Metatheria comprising more than 60% of its diversity. Among identified metatherian clades, it has been argued that Paucituberculata is represented by “ Ri...

Mobilização social e ação coletiva no Semiárido Brasileiro: convivência, agroecologia e sustentabilidade

This text seeks to reflect on the trajectory of social mobilization for the construction of the notion of coexistence with the semi-arid, from the decade of 1990. The coexistence of the human being with his environment is an essential dimension of Agroecology, having as perspecti...

Extensão Rural Agroecológica: experiências e limites

The article begins with a theoretical approach on the construction of a proposal of Rural Agroecological Extension (ERA), then links the theoretical aspects of the ERA and empirical data of a network ATER, analyzing nine projects of Technical Accompaniment and Rural Extension dev...

Juventudes Rurais e Agroecologia: um diálogo imprescindível

Arguments from different areas of knowledge (Economics, Philosophy, Sociology, among others) point to a civilization crisis experienced by humanity in our day. In order to solve this crisis, it is necessary to mobilize different social and political actors, many of them invisibil...

Agroecologia e Economia Solidária: um diálogo necessário à consolidação do direito à soberania e segurança alimentar e nutricional

This article aims to analyze the practices of agroecology and solidarity economy movements in the conquest of the right to food and nutritional sovereignty and security. These movements not always have the same strategy, complement each other by acting in different territories to...

Longitudinal gradients modulate the distribution, composition, and ecological risk of microplastics in a neotropical public water supply reservoir

Abstract Microplastics (MPs) contamination was assessed in the water and surface sediment in the upstream, dam, and downstream zones of the Tapacurá Reservoir, a tropical public water supply system in northeastern Brazil, over the course of four sampling campaigns. MPs were detec...

The first complete genome sequence of iris yellow spot virus from South America and comparative analysis with isolates of different geographic origin

Abstract We report the first complete nucleotide sequence of an isolate of iris yellow spot virus (IYSV; Orthotospovirus iridimaculaflavi ) from Brazil. Isolate Br-25 was collected in 2025 in Imbuia, Santa Catarina, from symptomatic onion scapes. The genome of IYSV-Br-25 consiste...