https://www.alice.cnptia.embrapa.br/alice/handle/item/8 Embrapa Amazônia Ocidental (CPAA) Tue, 21 Jul 2026 17:48:23 GMT 2026-07-21T17:48:23Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188201 Título: Plant growth- promoting bacteria inoculation and co-inoculation effects on Palisade grass (Urochloa brizantha cv. Marandu) in ferralsol in Amazonas State, Brazil. Autoria: BATISTA, S. R.; MAJOLO, C.; PERIN, R.; NOGUEIRA, M. A.; HUNGRIA, M.; OLIVEIRA-PAIVA, C. A.; SÁ, E. L. S. de; MÜLLER, C.; LOPES, M. T. G.; MUNIZ, A. W. Conteúdo: Deforestation is primarily driven by three main factors the conversion of the Amazon rainforest into pastureland, agriculture, and mining, as well as land invasion. These pastures are mostly degraded, and it is necessary to restore their productive capacity. Microbial inoculants can be used to increase nutrient use efficiency. The objective of this study was to evaluate the effects of inoculation and co-inoculation of the bacteria Rhizobium anhuiense (RZ), Azospirillum brasilense (AZ) and Pseudomonas fluorescens (PF) on the growth of the grass Urochloa brizantha cv. Marandu. The field experiment with inoculants in U. brizantha was carried out in a randomized block design with four replications. The treatments consisted of different doses of NPK and types of inoculation. The variables used in the evaluation were plant height, number of tillers, productivity, and foliar NPK content. The results showed an interaction between fertilizer doses and inoculation treatments for variables such as number of tillers and productivity. Co-inoculation positively influenced productivity and plant nutrient content in some combinations and fertilizer doses. These findings suggest that inoculation and co-inoculation with different bacteria used different fertilizer doses, increasing the number of tillers, dry mass (P and K), and yield of Palisade grass as observed in co-inoculation with AZ + RZ. Thu, 01 Jan 2026 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188201 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188102 Título: Efeito anti-helmíntico in vitroda espécie Andira vermifugacontra Neoechinorhynchus buttnerae. Autoria: PEREIRA, T. B.; LOPES, E. V.; CHAGAS, E. C.; PEREIRA, D. da S.; POHLIT, A. M. Conteúdo: RESUMO: A infecção pelo acantocéfaloNeoechinorhynchus buttneraeconstitui um dos principais entraves à produção de tambaqui (Colossoma macropomum) na Amazônia. Este estudo avaliou a atividade anti-helmíntica in vitrode extratos e frações deAndira vermifugacontraN. buttnerae. As folhas foram secas, trituradas e submetidas à maceração sequencial com solventes de polaridade crescente (hexano, acetato de etila e metanol). O extrato metanólico e as frações hidroalcoólicas dos extratos hexânico e de acetato de etila foram testados in vitrocontra acantocéfalos de tambaquis naturalmente infectados. Todas as amostras promoveram 100% de mortalidade deN. buttneraeapós 24 h nas concentrações de 25 e 50 mg/L. A fração hidroalcoólica do extrato em acetato de etila foi a mais promissora, atingindo 100% de mortalidade em 6 h a 25 mg/L e apresentando elevada eficácia mesmo em baixas concentrações. Os resultados evidenciam o potencial de extratos de média polaridade de plantas amazônicas como fonte de compostos antiparasitários eficazes no controle de infecções que afetam a piscicultura do tambaqui. ABSTRACT: Infection by the acanthocephalan Neoechinorhynchus buttnerae is one of the main obstacles totambaqui (Colossoma macropomum) production in the Amazon. This study evaluated the in vitro anthelmintic activity of extracts and fractions of Andira vermifuga against N. buttnerae. The leaves were dried, crushed, and subjected to sequential maceration with solvents of increasing polarity (hexane, ethyl acetate, and methanol). The methanolic extract and the hydroalcoholic fractions of the hexane and ethyl acetate extracts were tested in vitro against acanthocephalans of naturally infected tambaqui. All samples promoted 100% mortality of N. buttnerae after 24 h at concentrations of 25 and 50 mg/L. The hydroalcoholic fraction of the ethyl acetate extract was the most promising, achieving 100% mortality in 6 hours at 25 mg/L and showing high efficacy even at low concentrations. The results highlight the potential of medium-polarity extracts from Amazonian plants as a source of effective antiparasitic compounds for controlling infections affecting tambaqui fish farming. RESUMEN: La infección por el acantocéfalo Neoechinorhynchus buttnerae es uno de los principales obstáculos para la producción de tambaquí (Colossoma macropomum) en la Amazonía. Este estudio evaluó la actividad antihelmíntica in vitro de extractos y fracciones de Andira vermifuga contra N. buttnerae. Las hojas se secaron, trituraron y se sometieron a maceración secuencial con solventes de polaridad creciente (hexano, acetato de etilo y metanol). El extracto metanólico y las fracciones hidroalcohólicas de los extractos de hexano y acetato de etilo se probaron in vitro contra acantocéfalos de tambaquí infectado naturalmente. Todas las muestras promovieron una mortalidad del 100% de N. buttnerae después de 24 h a concentraciones de 25 y 50 mg/L. La fracción hidroalcohólica del extracto de acetato de etilo fue la más prometedora, alcanzando una mortalidad del 100 % en 6 horas a 25 mg/L y mostrando una alta eficacia incluso a bajas concentraciones. Los resultados destacan el potencial de los extractos de polaridad media de plantas amazónicas como fuente de compuestos antiparasitarios eficaces para el control de infecciones que afectan a la piscicultura de tambaquí. Thu, 01 Jan 2026 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188102 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187826 Título: Geographical traceability of Manilkara huberi (Ducke) A. Chev. by chemical signature. Autoria: SILVA, A. C. L. da; LOPES, M. T. G.; TOMAZ, J. S.; VALENTE, M. S. F.; BEZERRA, C. de S.; CAPUCHO, H. L. V.; MARQUES, R. L. S.; LOPES, R.; PEREIRA, A. M.; FERREYRA RAMOS, S. L. Conteúdo: This study evaluated the potential of Total Reflection X-ray Fluorescence (TXRF) as a geochemical traceability method for wood from Manilkara huberi (Ducke) A. Chev., a species of high commercial and ecological value widely exploited in the Legal Amazon. Wood samples were collected in eight locations in the states of Amazonas, Pará, Rondônia, and Roraima, representing different edaphic, geological, and climatic conditions in the context of Amazonian edaphic and geological variability. The multielemental analysis revealed significant variations in trace element and macronutrient concentrations (Fe, Mn, K, Ca, Sr, Rb), reflecting the specific geochemical signatures of each region. Multivariate analyses (PCA and NMDS) showed distinct groupings among the populations, confirming the discriminatory capacity of TXRF in the differentiation of geographical origins. Significant correlations between elements such as K × Rb and Cr × Fe demonstrated consistent patterns of coaccumulation and antagonism associated with local geochemistry. The results prove the efficiency of TXRF as a non-destructive, sensitive, and low-cost technique for origin authentication and forensic investigation of Amazonian wood, strengthening sustainable management policies and combating illegal exploitation. The proposed methodology is a scientific advance in forest traceability and biodiversity conservation, contributing to the transparency and legality of timber production chains in the Amazon. Thu, 01 Jan 2026 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187826 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187793 Título: A modeling framework to assess climate vulnerability and future distributions of tropical tree species: a case study on Brazilian ipês. Autoria: BORBA, F. de C.; BEZERRA, C. de S.; TOMAZ, J. S.; MARQUES, M. J.; CAPUCHO, H. L. V.; SOUZA, S. F. de; FERREYRA RAMOS, S. L.; LOPES, R.; MENESES, C. H. S. G. de; LOPES, M. T. G. Conteúdo: Assessing climate vulnerability of tropical trees requires ecological niche modeling frameworks capable of integrating multiple sources of uncertainty. Here, we present an integrated modeling approach that combines climatic, edaphic, and topographic predictors, dimensionality reduction, multi-algorithm calibration, and ensemble forecasting to evaluate future environmental suitability under climate change. Using two Brazilian Handroanthus species as a case study, occurrence data were spatially filtered, predictors were summarized through principal component analysis, and models were built using six algorithms with performance-weighted consensus projections. Future distributions were projected for three time periods (2041–2060, 2061–2080, and 2081–2100) under intermediate and high emission scenarios (SSP2-4.5 and SSP5-8.5). The framework showed high predictive reliability and revealed contrasting vulnerability patterns, including severe suitability losses for one species and greater stability for the other across phytogeographic domains. Beyond species-specific outcomes, results demonstrate how integrated Ecologial Niche Modeling (ENM) frameworks can identify climate-driven risk gradients and support climate-informed conservation, forest management, and territorial planning in tropical regions. Thu, 01 Jan 2026 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187793 2026-01-01T00:00:00Z