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Anais da Academia Brasileira de Ciências

João Antonio D Giles, Gleison Oliosi, Weverton P Rodrigues, Heder Braun, Ana I Ribeiro-Barros, Fábio L Partelli
The morphoagronomic characterization of 12 genotypes of M. esculenta was performed during the 2013/2014 and 2014/2015 crop years. The 12 genotypes were planted in a randomized block design, with four replicates per genotype. Number of tuberous roots per plant, weight of tuberous roots, root yield, total plant weight, harvest index, plant height, height of first branch, number of shoots, stem diameter, number of buds, leaf dry weight and petiole length were evaluated. Genotypes "Camuquem" and "Goiás" were the most productive, and "Amarela" and "Gema de Ovo" were the most divergent...
September 3, 2018: Anais da Academia Brasileira de Ciências
Marcelo A S Rego, Omar J Sabbag, Roberta B Soares, Silvio Peixoto
Shrimp farming has a great ecological, economic, and social importance in northeastern Brazil. Although the conventional farming system is widely used, biofloc technology (BFT) system has been developed to reduce environmental impacts and optimizing the production. Thus,the present study evaluated the technical efficiency of production cycles of Litopenaeus vannamei in conventional and BFT systems.We analyzed 48 production cycles in the conventional system in 2013 and 2014 and 9 cycles in the BFT system in 2014 through data envelopment analysis (DEA)...
September 3, 2018: Anais da Academia Brasileira de Ciências
Ximena M DE Oliveira, Andressa Ribeiro, Antonio Carlos Ferraz Filho, Rafaella C Mayrinck, Renato R DE Lima, José Roberto S Scolforo
African mahogany (Khaya spp.) plantations are in expansion in Brazil and in the world. This fact justifies the need for studies related to its growth and yield. This paper aimed to evaluate the performance of single-entry and double-entry models for estimating merchantable and total volume for Khaya ivorensis plantations before the first thinning (7 years) and expected final cut (15 years). Volume data was from 100 and 46 trees in Minas Gerais and Pará states, respectively, by using an electronic dendrometer (Criterion RD 1000)...
September 3, 2018: Anais da Academia Brasileira de Ciências
Tatiane C Reis, Marcus A Soares, José B Dos Santos, Conceição A Dos Santos, Jose Eduardo Serrão, José C Zanuncio, Evander A Ferreira
Herbicides can impact non-target metabolic pathways in natural enemies and lead to the reduction of these populations in the field. Behavioral characteristics, morphology and histology of reproductive structures and reproduction of females of Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae) were evaluated under the effect of the herbicides atrazine, nicosulfuron and the mixture of both. The number of mature oocytes per ovary was lower in females exposed to the herbicides atrazine, nicosulfuron and the mixture of both...
September 3, 2018: Anais da Academia Brasileira de Ciências
Fábio T Delazari, Igor R Assis, Diego F V Cabrera, Mariane G Ferreira, Luiz E Dias, Angelica Rueda, José C Zanuncio, Derly J H Silva
The sweet potato is an alternative energy source, but its sustainability depends on efficient water use. The objective of this study was to evaluate sweet potato morpho-physiological characteristics, and water use efficiency (WUE). Irrigation depths of 50, 75, 100, and 125% of crop evapotranspiration (ETc) were applied. The morpho-physiological indicators, WUE, leaf area index (LAI), leaf water potential, leaf temperature, and leaf chlorophyll index (ICF), were evaluated. The WUE of the sweet potato cultivars increased until the 75% water depth of the ETc...
September 3, 2018: Anais da Academia Brasileira de Ciências
Evandro L Schoninger, Hugo A González Villalba, José Albertino Bendassolli, Paulo Cesar O Trivelin
Best fertilizer management practices such as adopting the right N sidedress timing can reduce N losses by volatilization, thus, raising N-fertilizer recovery and grain yield. To evaluate ammonia (N-NH3 ) losses, N-fertilizer recovery and grain yield as a function of urea sidedress timing in corn, a field study was conducted during the 2011-2012 and 2012-2013 growing seasons, adopting a complete randomized block design with four replications. Treatments consisted of urea sidedress timing (140 kg N ha-1) at V4, V6, V8, V10, and V12 growth stages, plus a control without sidedress N...
September 3, 2018: Anais da Academia Brasileira de Ciências
Roberta G DE Souza, Maurício L Dan, Maristela A Dias-Guimarães, Lorena A O P Guimarães, João Marcelo A Braga
Supplying food to growing human populations without depleting natural resources is a challenge for modern human societies. Considering this, the present study has addressed the use of native arboreal species as sources of food for rural populations in the Brazilian Atlantic Forest. The aim was to reveal species composition of edible plants, as well as to evaluate the practices used to manage and conserve them. Ethnobotanical indices show the importance of many native trees as local sources of fruits while highlighting the preponderance of the Myrtaceae family...
September 3, 2018: Anais da Academia Brasileira de Ciências
Bárbara N S Costa, Irton J S Costa, Genaina A DE Souza, Dalilhia N Dos Santos, Flávia A DA Silveira, Evaldo T DE Melo, Adalvan D Martins, Moacir Pasqual, Tesfahun A Setotaw, Filipe A Rodrigues
The jelly palm plant [Butia capitata (Martius) Beccari] is a native palm of the Cerrado biome used for many purposes in northern Minas Gerais State, Brazil. Dormancy is common in palm seeds, resulting in slow and uneven germination that may take years to complete. Modification in the growth pattern, anatomical parameters, physiological and biochemical characteristics of the plant can be verified due to changes in the light spectrum transmitted through colored shade nets used. Therefore, the objective of this study is to evaluate the effect of colored shade nets on the leaf and root anatomy of the jelly palm plant...
September 3, 2018: Anais da Academia Brasileira de Ciências
Natália V Salomão, Evandro L M Machado, Rafaella S Pereira, Geraldo W Fernandes, Anne P D Gonzaga, Danielle P Mucida, Leovandes S DA Silva
The theory of landscape ecology applied to the methods of spatial analysis helps to understand changes in the structure of forest remnants. In view of this theory, the objective of the present study was to analyze the structure of a fragmented area between the years 1979 and 2015 through calculation of landscape metrics for arboreal, shrubby and herbaceous vegetation classes. Vegetation classes were classified with visits to the field, interpretation of aerial photographs from 1979 and supervised classification of Landsat 8 from 2015...
September 3, 2018: Anais da Academia Brasileira de Ciências
Leandro D DA Silva, Oodilon G Pereira, Thiago C DA Silva, Sebastião C Valadares Filho, Karina G Ribeiro, Stefanie A Santos
Legume silage can increase the forage quality of the diets as well as supply it with nitrogen, calcium and phosphorus. The objective was to evaluate the intake, apparent digestibility, rumen fermentation and nitrogen efficiency in sheep fed a tropical legume silage with or without concentrate. Twelve crossbred sheep with an average initial body weight of 32.2 ± 1.26 kg, with six animals cannulated in the rumen were distributed into four 3 × 3 Latin squares. The treatments were 1) Stylosanthes silage without concentrate (StS), 2) Stylosanthes silage with concentrate (StS+C), and 3) corn silage with concentrate (CS+C)...
September 3, 2018: Anais da Academia Brasileira de Ciências
Carina DE S Anselmo, Thamara C Mendes, Lucio M Cabral, Valéria P DE Sousa
Dietary supplements in many countries such as the USA do not require registration prior to commercialization. The Agência Nacional de Vigilância Sanitária (ANVISA) registers substances with functional properties as foods. Lutein is a carotenoid with antioxidant activity available on the market. However, no regulatory mandates exist to govern the design of quality control tests, which are necessary to ensure formulation effectiveness. Therefore, in the present study, tablet and dosage formulations from different manufacturers were tested following general methods outlined in the Brazilian and American Pharmacopeias...
July 19, 2018: Anais da Academia Brasileira de Ciências
Mariela J Simão, Thiago J S Barboza, Marcela G Vianna, Renata Garcia, Elisabeth Mansur, Ana Claudia P R Ignacio, Georgia Pacheco
Passiflora species are well known for their common use in popular medicine for the treatment of several diseases, such as insomnia, anxiety, and hysteria, in addition to their anti-inflammatory, antioxidant, analgesic and antibacterial potential. However, few data about the chemical composition and the medicinal potential of in vitro derived materials are available. Therefore, the goal of this work was to compare, for the first time, the phytoconstituents of in vitro derived materials of four Passiflora species, and evaluate the antibacterial potential of their extracts against 20 Gram-positive and negative strains...
July 19, 2018: Anais da Academia Brasileira de Ciências
Federico Lozano, Marciel E Rodrigues
Acanthagrion marinae sp. nov. (Holotype male: BRASIL, Mato Grosso do Sul, Campo Grande, UFMS, 20°29'56.26''S - 54°36'48.43''W, 547m, leg. M.E. Rodrigues, 03.ii.2015, collection code: VZYG437, MLP) is described and illustrated on the basis of 15 males. The new species belongs to the apicale species group by having horns on S10 and sclerotized hooks on tip of distal segment of the genital ligula. It can be easily distinguished from other species of the group by a combination of characters of the genital ligulae (presence of setae on segment two; absence of setae at flexure; distal lateral lobes of segment three absent)...
July 19, 2018: Anais da Academia Brasileira de Ciências
Fabiano F Albertoni, Carlos G C Mielke, Marcelo Duarte
The light-attracted silk moths (Lepidoptera: Saturniidae) of the Boraceia Biological Station in the municipality of Salesópolis, state of São Paulo, southeastern Brazil have been sampled over more than seven decades (1942-2013). A total of 6,288 individuals (including a gynandromorph) belonging to five subfamilies, 46 genera and 133 species were identified. Hemileucinae was the most abundant and speciesrich subfamily, followed by Ceratocampinae, Arsenurinae, Saturniinae, and Oxyteninae. Hylesia Hübner, Automeris Hübner, and Dirphiopsis Bouvier (Hemileucinae) were the dominant genera in abundance and species richness...
July 19, 2018: Anais da Academia Brasileira de Ciências
Lourdes C S Lopes, Lucas M Brito, Thayllan T Bezerra, Kleyton N Gomes, Fernando A DE A Carvalho, Mariana Helena Chaves, Welter Cantanhêde
Gold (Au0) and silver (Ag0) nanoparticles were synthesized using tannic acid (TA) as both reducing and stabilizer. Nanoparticles formation, stability, and interaction with TA were compared to citrate-coated nanoparticles and monitored by UV-Vis, zeta potential, and transmission electron microscopy. TA coating resulted in a red-shift and broadening of bands compared to citrate-coated nanoparticles (NPs-Cit). AgNPs-TA and AuNPs-TA are negatively charged with mean surface charge of -29.4 mV and -29.6 mV, respectively...
July 19, 2018: Anais da Academia Brasileira de Ciências
Maria O Santos, Daiany A Ribeiro, Delmacia G DE Macêdo, Márcia J F Macêdo, Julimery G F Macedo, Maria Natália S DE Lacerda, Maria Soraya Macêdo, Marta Maria A Souza
This study aims to investigate the diversity of native medicinal plants in a caatinga area, verifying the versatility of species and concordance of use among the informants, in the Angico de Cima community, in the city of Aurora, Ceará, Brazil. Ethnobotanical data were obtained through semi-structured interviews with key informants, adopting the snowball technique. The Relative Importance (RI) and Consensus Factor among Informants (ICF) were analyzed to indicate the most versatile species with the highest agreement of use, respectively...
July 19, 2018: Anais da Academia Brasileira de Ciências
María Luisa Chavarría-Arellano, Tiago R Simões, Marisol Montellano-Ballesteros
Borioteiioids comprise an extinct family of squamates that inhabited the Northern Hemisphere during the Cretaceous and were characterized by varying patterns of tooth replacement and dental morphology. Understanding the evolution of these tooth replacement patterns has, however, been largely hampered by an extremely fragmentary fossil record. Here we present new information on Dicothodon bajaensisfrom the Campanian of Baja California (Mexico), so far known only from isolated teeth and jaw fragments. Among abundant new materials there are ten maxillae and five dentaries belonging to distinct ontogenetic stages...
July 19, 2018: Anais da Academia Brasileira de Ciências
Carlos A Diniz, Vilma M Ferreira, Clíssiab DA Silva, Geraldo V S Barbosa, João C DE Araújo Neto, João M Dos Santos
A major challenge in sugarcane breeding program is the obtaining of enough number of seeds (caryopses) for the development of new improved cultivars. Genotypes differ in their function as pollen recipient and pollen donor, which also affect the seed performance. Thus, the aim of this study was to verify the production and performance of sugarcane seeds from different hybridizations involving RB92579 as pollen recipient and pollen donor. Twelve bi-parental crossings were carried out involving RB92579 and other different genotypes randomly chosen...
July 19, 2018: Anais da Academia Brasileira de Ciências
María Gabriela Cuezzo, Augusto P DE Lima, Sonia B Dos Santos
A detailed anatomical revision on Solaropsis brasiliana (Deshayes 1832) has been carried out. New characters on shell, anatomy of soft parts, and a review of the genus distribution in South America, as well as clarification on S. brasiliana distributional area are provided in the present study. Solaropsis brasiliana is diagnosed by its globose, solid, and hirsute shell, with periphery obsoletely angular, bursa copulatrix with a thick, long diverticulum, a thick, long flagellum and a penis retractor muscle forked, with the vas deferens passing through it...
July 19, 2018: Anais da Academia Brasileira de Ciências
Allan L Pelissari, Afonso F Filho, Angelo A Ebling, Carlos R Sanquetta, Vinicius C Cysneiros, Ana Paula D Corte
Floristic surveys and diversity indices are often applied to measure tree species diversity in mixed tropical forest remnants. However, these analyses are frequently limited to the overall results and do not allow to evaluate the spatial variability distributions of tree diversity, leading to develop additional tools. This study aimed to estimate the spatial variability of tree diversity and map their spatial patterns in a Brazilian mixed tropical forest conservation area. We used indices to measure the tree species diversity (dbh ≥ 10 cm) in 400 sampling units (25 m x 25 m) from a continuous forest inventory...
August 2018: Anais da Academia Brasileira de Ciências
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