Embrapa Florestas (CNPF) https://www.alice.cnptia.embrapa.br/alice/handle/item/14 2026-07-15T00:54:10Z 2026-07-15T00:54:10Z SOUZA, P. B. A. OLIVEIRA, D. S. LIMA, R. M. B. de LIMA, M. P. NASCIMENTO, C. C. LIMA, R. M. SILVA, D. F. SILVA, M. F. G. F. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188233 2026-07-12T16:47:49Z 2026-01-01T00:00:00Z

Título: Study in wood of Ceiba pentandra (L.) Gaertn. from planting: chemical constituents and their biological importance. Autoria: SOUZA, P. B. A.; OLIVEIRA, D. S.; LIMA, R. M. B. de; LIMA, M. P.; NASCIMENTO, C. C.; LIMA, R. M.; SILVA, D. F.; SILVA, M. F. G. F. Conteúdo: Ceiba pentandra (Malvaceae) is a species popularly known in North Brazil as “sumaúma” that has attracted interest in phytochemical studies due to the diversity of classes of compounds biologically active. The objective of this study was to investigate the chemical constituents present in the wood residues of Ceiba pentandra and to evaluate the antibacterial activity of a purified sesquiterpene lactone against Xanthomonas citri subsp. citri. The isolated compounds were identified based on one-dimensional (1H and 13C) and/or two-dimensional (HSQC and HMBC) NMR analyses, the mixtures of fatty acid were characterized by GC-MS. The chemical constituents identified were steroids (cholest-4-en-3-one, stigmast-4-ene-3,6-dione, β-sitosterol, and stigmasterol); macrolides (des-O-methyl-lasiodiplodine and lasiodiplodine); isocoumarin (4-hydroxymelein); sesquiterpene lactone (isohemigosilicic acid lactone-2-methyl ether); and a mixture of fatty acids (palmitic acid, oleic acid, stearic acid, linoleic acid, and dihydrosterculic acid). The sesquiterpene lactone was evaluated against the bacterium Xanthomonas citri ssp. citri and demonstrated bactericidal and bacteriostatic activities at concentrations up to 400 µg mL-1. Our phytochemical study aggregated knowledge of this wood species originated from plantation sites and found activity bactericide to combat citrus canker.

2026-01-01T00:00:00Z MARTINS, M. F. de O. NICKELE, M. A. FEITOSA, R. M. PIE, M. R. REIS-FILHO, W. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188239 2026-07-12T16:47:56Z 2021-01-01T00:00:00Z

Título: Species list of ground-dwelling ants (Hymenoptera: Formicidae) in the Nhecolândia, Pantanal, Mato Grosso do Sul, Brazil Autoria: MARTINS, M. F. de O.; NICKELE, M. A.; FEITOSA, R. M.; PIE, M. R.; REIS-FILHO, W. Conteúdo: This study provides a list of the ground-dwelling ant species in Nhecolândia, Pantanal, Mato Grosso Sul, Brazil. The Pantanal is the largest tropical wetland in the world and is currently under strong anthropic pressure. Ground-dwelling ants were collected in three sites: (1) a forest regeneration area; (2) a pasture area; and (3) an area of secondary native vegetation. In each site, 120 samples were collected using pitfall traps in the dry and rainy seasons of 2016. Additional samplings were performed with Winkler extractors (30 leaf-litter samples) and manually, also in dry and rainy seasons of 2016. In total, we collected 172 species, which, summed with the additional records from literature, raise the number of ant species recorded in Nhecolândia to 184 in 42 genera and nine subfamilies. Eleven species were recorded for the first time in the state of Mato Grosso do Sul. Also, the survey adds two new species records to Brazil. Besides contributing to the inventory of the ant species present in the Pantanal biome, the present study provides an important resource for future conservation plans for this threatened ecoregion.

2021-01-01T00:00:00Z LACERDA, A. E. B. de https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188199 2026-07-12T16:47:27Z 2021-01-01T00:00:00Z

Título: Understanding the long-term Impact of bamboos on secondary forests: a case for bamboo management in Southern Brazil. Autoria: LACERDA, A. E. B. de Conteúdo: As secondary forests become more common around the world, it is essential to understand successional pathways to ensure their proper forest management. Despite optimism about secondary forests in terms of landscape restoration, the influence of invasive species on their development has been poorly explored. Here, forest plots in the Araucaria Forest, Southern Brazil, are used to compare forest dynamics over a 14-year period between unmanaged bamboo forest development (control) and the removal of bamboo. Six control plots (15 × 15 m) were monitored for all adult trees since 2007 alongside six adjacent removal plots; after the initial measurement of the control in 2007, all plots were measured bi-annually from 2010 to 2020. Comparisons were based on tree species diversity, composition, and structure parameters. Removal plots show a trend towards developing a forest composition with more secondary and late successional species while the control plots demonstrate succession restricted to the pioneer trees that regenerated immediately after bamboo die-off (2005–2006). Without the presence of bamboos, removal plots are mirroring the well-known successional pathway typical of the Araucaria Forest. Conversely, bamboos are effectively arresting successional development in the control, resulting in lower levels of diversity and less complex forest structure. For the first time, this study presents a direct analysis of the influence of bamboos on forest succession, providing evidence on which practices to manage bamboo forests can be developed so these secondary forests can fulfill their ecological and economic potential.

2021-01-01T00:00:00Z LEITÃO, R. FERREIRA, T. FERREIRA, N. G. OROZCO-TERWENGEL, P. KILLE, P. BROWN, G. G. CUNHA, L. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188171 2026-07-12T16:47:06Z 2026-01-01T00:00:00Z

Título: Compartment-specific responses of soil, root, and earthworm gut microbiomes to Terra Preta de Índio–inspired amendments in a tropical latosol. Autoria: LEITÃO, R.; FERREIRA, T.; FERREIRA, N. G.; OROZCO-TERWENGEL, P.; KILLE, P.; BROWN, G. G.; CUNHA, L. Conteúdo: in tropical agroecosystems, inspired by the persistent fertility of Terra Preta de ´ Indio (TPI; Amazonian Dark Earth). Here, we evaluated the individual and combined effects of biochar, manure, and the earthworm Pontoscolex corethrurus on bacterial communities across bulk soil, maize roots, and earthworm gut in a factorial pot exper iment using an acidic, inherently nutrient-poor tropical Latosol as a model soil. High-throughput 16S rRNA gene sequencing revealed strong compartmentalisation of bacterial communities, while also identifying a prevalence- defined core shared across compartments that accounted for 75.4% of total sequence abundance despite limited taxonomic overlap. Responses to experimental factors were strongly compartment-dependent. In bulk soil, manure was the principal driver of bacterial community composition through shifts in pH and nutrient availability, whereas earthworms increased exchangeable Fe and restructured microbial networks toward greater modularity. Root- associated communities were comparatively buffered, whereas the earthworm gut remained responsive to manure, and biochar altered gut network topology. Crucially, the stacked TPI-inspired treatment (TPI mix), combining biochar, manure, earthworms, and maize, generated non-additive microbial trajectories and emergent community states across compartments. These microbial shifts were accompanied by improved functional out comes: while manure was the only individual factor to enhance maize growth, the stacked TPI mix produced the strongest overall response. Bradyrhizobium emerged as a key indicator taxon, reaching high relative abundance in both soil and earthworm gut under the integrated treatment. Our findings show that TPI-inspired amendment strategies can reorganise microbiomes across the soil–root–fauna continuum, with implications for soil biological functioning and fertility improvement in low-fertility soils.

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