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Here, we report 10 distinct bacterial genomes from Amazonian dark earths, including six identified as , while the remaining four were unique representatives of , , , and sp., respectively. Each strain exhibited antagonistic activity against , underscoring their potential as sustainable agriculture resources.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10652921 | PMC |
http://dx.doi.org/10.1128/MRA.00574-23 | DOI Listing |
Environ Sci Technol
August 2025
Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States.
Amazonian anthrosols are renowned for their high fertility and dark color, properties primarily attributed to the abundance of condensed aromatic carbon (ConAC) in the soil organic matter. ConAC, commonly referred to as black carbon, play a key role in the stability and nutrient retention of these soils. However, the processes governing the formation of ConAC and its transformation into oxygenated derivatives remain poorly understood.
View Article and Find Full Text PDFPlant Dis
July 2025
Universidade Federal de Roraima, Departamento de Fitotecnia, BR 174 - Km 12, Distrito de Monte Cristo, Campus Cauamé, Boa Vista, Roraima, Brazil, 69300-000;
Camu-camu (Myrciaria dubia (Kunth) McVaugh) is an Amazonian fruit with high economic potential due to its reported health-promoting properties, including elevated antioxidant and anti-inflammatory compound levels. Since 2018, anthracnose-like lesions, starting as small dark spots and coalescing into large irregular or circular lesions, were observed in up to 60% of camu-camu plants in an experimental field located in the city of Boa Vista, Roraima, Brazil (2°52'20.7″ N; 60°42'44.
View Article and Find Full Text PDFThe suppression of isoprene emissions by high CO levels can be mitigated by increasing temperature; however, little is known about why and to what extent species differ in their temperature-dependent release from high CO inhibition. We studied leaf photosynthetic characteristics and isoprene emissions over a 25°C-40°C temperature range at CO concentrations of 150, 400, and 1000 μmol mol in two species with contrasting heat resistance. In the temperate species , rising temperatures above 30°C shifted electron flow from photosynthesis to isoprene synthesis, reducing CO inhibition due to enhanced isoprene synthase activity and decreased sensitivity of the DMADP pool.
View Article and Find Full Text PDFZookeys
April 2025
Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia Manaus Brazil.
The genus has 16 known species, and the last of them was described 13 years ago. The forests of the Juruá River basin are known for their enormous vertebrate diversity, despite being one of the least sampled regions in the entire Amazonia. Our recent expeditions to the region resulted in the discovery of a species with blue-green dorsal stripes and quite peculiar behavior.
View Article and Find Full Text PDFMicroorganisms
March 2025
Bioprospecting and Biotechnology Laboratory, Technology and Innovation Coordination, National Institute of Amazonian Research, Manaus 69067-375, AM, Brazil.
Endophytic fungi are valuable sources of bioactive secondary metabolites, with potential applications in pharmaceutical and agricultural fields. This study investigates the metabolic potential of , an endophytic fungus isolated from . To date, no secondary metabolites have been identified from this species, highlighting the novelty of this research and its contribution to understanding the chemical diversity of endophytic fungi.
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