https://www.alice.cnptia.embrapa.br/alice/handle/item/223 Artigo em periódico indexado (CNPMA) Thu, 25 Jun 2026 20:47:27 GMT 2026-06-25T20:47:27Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187776 Título: Comparision of methane emissions measured in a paddy rice field in Southeastern Brazil with a DNDC model-simulated emissions. Autoria: LIMA, M. A. de; PESSOA, M. C. P. Y. Conteúdo: Abstract: Paddy rice cultivation is an important anthropogenic source of atmospheric methane (CH4). Quantifying CH4 emissions under specific crop conditions is essential to improve the accuracy of global greenhouse gas estimates. Computer modeling simulation may contribute to a better understanding of how different environmental factors affect seasonal CH4 emissions, thereby supporting mitigation strategies. The objective of this study was to compare three-growing-season field measurements of CH₄ emissions from a paddy rice field, under pre-germinated system, in Pindamonhangaba, São Paulo State, Brazil, with estimates of emissions obtained from simulations using the DeNitrification– DeComposition (DNDC) model under the same conditions. Methane fluxes were measured weekly using the closed-chamber method, and model input parameters were derived from the site-specific conditions (soil, crop, management, and climate) for each season. Daily pattern of CH4 fluxes and seasonal emissions were obtained by DNDC for the evaluated growing seasons. The mean seasonal CH4 fluxes quantified in the field ranged from 231.72 ± 40.23 to 285.25 ± 51.66 kg C-CH4 ha-1, while those obtained using DNDC ranged from 210.53 to 267.39 kg C-CH4 ha-1. The model results fell within the variability of field quantifications, with one season slightly above the upper observational limit, demonstrating the good accuracy of this simulator to estimate seasonal methane emissions for the site. However, in spite of the simulated daily methane fluxes have showed a temporal trend similar to that observed in the field for all the growing seasons, the magnitude of the simulated emissions differed from some observed values. Thu, 01 Jan 2026 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187776 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187656 Título: Goosegrass management challenges in Brazil: the ongoing battle against herbicide resistance. Autoria: BRAZ, G. B. P.; BIFFE, D. F.; CONSTANTIN, J.; OLIVEIRA, R. S. de; PROCOPIO, S. de O.; REIS, G. dos; BARION, J. H. R. Conteúdo: Abstract: Eleusine indica (L.) Gaertn., commonly known as goosegrass, is one of the most troublesome weed species worldwide. In Brazil, the increasing number of herbicide-resistance cases, particularly to glyphosate, has made goosegrass the most agronomically significant weed species in the country. Given its rapid spread in recent cropping seasons, this review compiles current knowledge on goosegrass biology and herbicide resistance to support the development of more effective integrated weed management strategies. Successful control approaches must consider the species’ biological characteristics and the potential occurrence of herbicide-resistant populations in target areas. The adoption of preventive practices (e.g., cleaning machinery, purchasing seeds from certified companies), cultural practices (e.g., balanced fertilization, use of regionally cultivars, phytotechnical adjustments), and mechanical practices (e.g., mowing) can optimize the effectiveness of herbicides in controlling this weed. Chemical control of goosegrass should rely on pre-emergence herbicides, along with post-emergence products featuring different mechanisms of action, with sequential applications anticipated. Implementing integrated weed management systems offers the potential to mitigate the current losses and damage caused by goosegrass. Wed, 01 Jan 2025 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187656 2025-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187624 Título: Micro- and nanoplastics and brain sexual differentiation: an emerging neurodevelopmental threat within the DOHaD framework. Autoria: ARENA, A. C.; JORGE, B. C.; MANOEL, B. de M.; STEIN, J.; KASSUYA, C. A. L.; HISANO, H. Conteúdo: Abstract: Micro- and nanoplastics (MNPs) have been increasingly detected in human tissues, including the placenta and, more recently, the brain. Their capacity to cross biological barriers such as the placenta and the blood–brain barrier raises significant concern for sexually dimorphic neurodevelopment. Brain sexual differentiation, orchestrated by steroid hormones, neuroimmune signaling, and epigenetic programming during early life, represents one of the most hormonally sensitive and developmentally critical targets of environmental disruption. In this narrative review, we synthesize evidence positioning MNPs as potential endocrine and epigenetic disruptors that may reprogram hypothalamic circuits governing reproduction and socioemotional behavior within a DOHaD framework. Evidence is stronger in animal and cellular models, implicating oxidative stress, neuroinflammation, apoptosis, and disrupted neurotransmission as central mechanisms; however, sex-specific endpoints remain underexplored and human data are still limited. This review adds a novel integrative perspective by focusing on sexually dimorphic hypothalamic nuclei and by outlining testable, sex-informed hypotheses. We highlight key methodological priorities for future research, including environmentally relevant exposures, explicit consideration of sex as a biological variable, multi-omics approaches, and longitudinal designs. Thu, 01 Jan 2026 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187624 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187629 Título: Bacillus aryabhattai strain CMAA 1363 on Brachiaria brizantha development in four Brazilian regions Autoria: MOREIRA, A. C. S.; CAIXETA, G. A. N.; MELO, I. S. de Conteúdo: Abstract: The use of plant growth-promoting microorganisms is a promising alternative to improve Brachiaria performance. The potential of a Bacillus aryabhattai (strain CMAA 1363) inoculant, applied via seed treatment, to promote Brachiaria brizantha growth was evaluated, comparing it to commercial Azospirillum brasilense (strains Ab-V5 and Ab-V6) in four regions. The design was randomized blocks with six treatments and four replications: control, four doses of B. aryabhattai (1, 2, 4, and 8 mL kg-1), and A. brasilense (20 mL kg-1). Emergence, plant height, number of tillers, shoot dry mass, leaf nitrogen content, and productivity were evaluated. Data underwent normality and homoscedasticity tests, were submitted to ANOVA, and means were compared by Duncan’s test (10%). Inoculation with strain CMAA 1363 caused no phytotoxicity, promoted growth (increases up to 4.5 cm in height, 1.1 tillers, and 39 g dry mass), increased leaf N content by up to 5.9 g kg-1, and, at doses of 4 to 8 mL kg-1, increased productivity by up to 27.2%, demonstrating potential as a new crop inoculant. Thu, 01 Jan 2026 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187629 2026-01-01T00:00:00Z