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| Registros recuperados: 156 | |
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| Teixeira,Manoel Araújo; Melo,Itamar Soares de; Vieira,Rosana Faria; Costa,Francisco Eduardo Carvalho; Harakava,Ricardo. |
| O objetivo deste trabalho foi realizar um levantamento da diversidade de microrganismos endofíticos, em plantas de mandioca (Manihot esculenta Crantz) coletadas de áreas comerciais, no Estado de São Paulo, e de etnovariedades dos estados do Amazonas e Bahia e, também, avaliar seu potencial para fixar N atmosférico e para produzir ácido indolacético. Nos três estados, foram identificadas 47 espécies de microrganismos pertencentes a 27 gêneros. Bacillus spp. foi o mais freqüente em todas as regiões. O maior número de gêneros foi encontrado em plantas provenientes do Estado do Amazonas, que apresenta a maior diversidade de microrganismos endofíticos. Amplificações por PCR do gene nifH foram avaliadas em espécies bacterianas pertencentes às... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Bacillus; Actinobacteria; Fixação de nitrogênio; Ácido indolacético. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000100006 |
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| Carmo,Cátia Dias do; Silva,Maiane Suzarte da; Oliveira,Gilmara Alvarenga Fachardo; Oliveira,Eder Jorge de. |
| The geminivirus complex known as cassava mosaic disease (CMD) is one of the most devastating viruses for cassava (Manihot esculenta Crantz). The aim of this study was to use molecular-assisted selection (MAS) to identify CMD-resistant accessions and ascertain promising crosses with elite Brazilian varieties. One thousand two hundred twenty-four accessions were genotyped using five molecular markers (NS169, NS158, SSRY028, SSRY040 and RME1) that were associated with resistance to CMD, along with 402 SNPs (single-nucleotide polymorphism). The promising crosses were identified using a discriminant analysis of main component (DAPC), and the matrix of genomic relationship was estimated with SNP markers. The CMD1 gene, previously described in M. glaziovii, was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Breeding; Disease; Virus. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000600520 |
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| SILVA,Jonny Lucio Sousa; MOURA,Elisa Ferreira; ILKIU-BORGES,Fernanda; GALVÃO,Jessivaldo Rodrigues; FARIAS-NETO,João Tomé de; SILVA,Gisele Barata da; RÊGO,Marcela Cristiane Ferreira; CUNHA,Roberto Lisboa. |
| ABSTRACT Cassava is an important culture in Brazil and in the North of the country, and soft root rot has affected root production. The aim of this work was to identify root morphoanatomic and histochemical characters associated with root rot resistance. In areas with no occurrence of the disease, nine cassava genotypes were tested, four of which were resistant, and five were susceptible to root rot. Root harvest was carried out twelve months after sowing, and thickness of suber, suber and cortex, and secondary xylem were measured. Moreover, texture, suber cell layers, lignin content, and lignin monomers content of the portion suber and cortex were analyzed. Also, histochemical tests and scanning electron microscopy (SEM) analyses of the roots were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomy; Morphological characterization; Genetic breeding; Manihot esculenta. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000100001 |
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| Gabriel,Luana F.; Streck,Nereu A.; Uhlmann,Lilian O.; Silva,Michel R. da; Silva,Stefanía D. da. |
| O objetivo nesta revisão é reunir informações da literatura quanto à provável resposta da cultura da mandioca à mudança climática. Na maioria das plantas a taxa de crescimento tende a aumentar com a elevação da concentração de CO2 atmosférico, visto que o CO2 é o substrato para fotossíntese. Porém o aumento da temperatura do ar poderá anular os efeitos benéficos do CO2 na produtividade das culturas, em virtude do encurtamento do ciclo e do aumento da respiração de manutenção. Resultados de experimentos em casa de vegetação, a campo e numéricos, indicam que a resposta da planta de mandioca ao aumento de CO2 é positiva, ou seja, o aumento do CO2 atmosférico resulta em aumento na produtividade de raízes tuberosas de mandioca. O aumento de temperatura... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Efeito estufa; Aquecimento global; Produção de alimentos; Segurança alimentar. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014000100012 |
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| Silveira,H.M.; Silva,D.V.; Melo,C.A.D.; Neto,M.D.C.; Saraiva,D.T.; Ferreira,E.A.; Silva,A.A.; Freitas,M.S.. |
| Soil is a very heterogeneous environment that allows the establishment of wide range of microorganisms populations, whose balance is affected by biotic and abiotic factors. This study has aimed to assess the effect of doses of mesotrione and fluazifop-p-butyl herbicides and two assessment periods on microbial activity and biomass of soil cultivated with cassava Cacau-UFV cultivar, besides the root colonization by arbuscular mycorrhizal fungi. Two trials were conducted in a protected environment where was realized post-emergence application of mesotrione in the doses of 72, 108, 144 and 216 g ha-1 and fluazifop-p-butyl in the doses of 100, 150, 200 and 300 g ha-1, besides a control without application. Soil samples were collected for determination of soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbial biomass; Arbuscular mycorrhizal fungi; Herbicide; Manihot esculenta. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200275 |
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| Rosa,Juliana Magrinelli Osório; Oliveira,Samara Azevedo de; Jordão,Alexandre Luis; Siviero,Amauri; Oliveira,Claudio Marcelo Gonçalves de. |
| A cultura da mandioca (Manihot esculenta) tem importância socioeconômica no Brasil, no entanto há ainda uma escassez de informações sobre a associação de nematoides fitoparasitas, bem como ao comportamento de cultivares de mandioca ao parasitismo desses agentes. O objetivo do presente trabalho foi relatar a distribuição geográfica e novas ocorrências das principais espécies de nematoides encontradas associadas à mandioca em diferentes municípios dos estados do Acre, Amapá, Pará e Rondônia. Além disso, estudou-se, em casa de vegetação, a reação de algumas cultivares de mandioca ao parasitismo de Meloidogyne incognita raça 3, Pratylenchus brachyurus e P. zeae. Nematoides foram extraídos de 10 g de raízes ou 250 cm³ de solo e identificados sob microscópio de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Helicotylenchus erythrinae; Manihot esculenta; Meloidogyne enterolobii; Pratylenchus brachyurus; Pratylenchus zeae; Resistência; Xiphinema longicaudatum. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000200013 |
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| Silva,Dreid de Cerqueira Silveira da; Martins,Márcio Lacerda Lopes; Santos,Ariana Silva; Santos,Vanderlei da Silva; Alves,Alfredo Augusto Cunha; Ledo,Carlos Alberto da Silva. |
| Abstract: The objective of this work was to evaluate the crossability between cassava (Manihot esculenta subsp. esculenta) cultivars and the subspecies M. esculenta subsp. flabellifolia and M. esculenta subsp. peruviana. Plants from the BRS Jari, BRS Formosa, BRS Verdinha, and BGM 2050 (Equador 72) cultivars were crossed with the two subspecies. During flowering, at pre-anthesis, pistillate flowers were covered with a nylon bag and staminate flowers on the same inflorescence were emasculated. The staminate flowers were collected and placed in flasks previously labeled and sterilized with alcohol; some fresh flowers were stored at room temperature due to asynchronous flowering. The crosses were made between 10 a.m. and 2 p.m. After pollination, the flowers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Controlled pollination; Hybrid; Plant breeding; Wild relative species. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000200182 |
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| Heberle,Elaine dos Santos; Armas,Rafael Dutra de; Heberle,Daniel Alexandre; Stürmer,Sidney Luiz; Peruch,Luiz Augusto Martins; Lovato,Paulo Emílio; Soares,Cláudio Roberto Fonsêca Sousa. |
| ABSTRACT Cassava (Manihot esculenta Crantz) is a highly mycotrophic crop, and prior soil cover may affect the density of arbuscular mycorrhizal fungi (AMFs), as well as the composition of the AMFs community in the soil. The aim of this study was to evaluate the occurrence and the structure of AMFs communities in cassava grown after different cover crops, and the effect of the cover crop on mineral nutrition and cassava yield under an organic farming system. The occurrence and structure of the AMFs community was evaluated through polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis (DGGE). A randomized block experimental design was used with four replications. Six different cover crop management systems before cassava were evaluated:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Arbuscular mycorrhizal fungi; Root symbioses. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000501292 |
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| Balota,Elcio Liborio; Lopes,Eli Sidney; Hungria,Mariangela; Döbereiner,Johanna. |
| Este trabalho teve como objetivo avaliar a ocorrência, isolar e identificar fungos micorrízicos arbusculares associados à cultura da mandioca (Manihot esculenta). Amostras de solo rizosférico e de várias partes da planta (raízes, tubérculos, manivas e folhas) de locais nos Estados do Rio de Janeiro, São Paulo e Paraná, foram inoculadas nos meios LGI-P, NFb-malato e NFb-GOC, avaliando-se o número mais provável de células e a atividade de redução de acetileno. Bactérias diazotróficas foram isoladas de todas as partes da planta, com exceção das folhas, sendo identificadas como Klebsiella sp., Azospirillum lipoferum e uma bactéria denominada "E", provavelmente pertencente ao gênero Burkholderia. A Bactéria E acumulou de 7,63 mg a 14,84 mg de N/g de C em meio... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Azospirillum; Burkholderia; Ecologia microbiana; Fixação de N2; Klebsiella; Manihot esculenta. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000700020 |
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| Vendramini,Jhonata Maia; Neves,Leonarda Grillo; Barelli,Marco Antonio Aparecido; Elias,Júlio César Ferreira; Luz,Petterson Baptista da. |
| O presente trabalho tem por finalidade avaliar e caracterizar os acessos de mandioca que estão introduzidos na coleção de germoplasma da UNEMAT presentes no campo experimental da EMPAER do município de Cáceres, e verificar a utilização do uso dos descritores morfo-agronômicos quanto à sua eficiência, com emprego de variáveis multicategóricas, através de análise multivariada. Em cada acesso foram analisados e avaliados 40 descritores morfológicos e agronômicos, considerados como essenciais para a execução dos ensaios de distinguibilidade, homogeneidade e estabilidade dos acessos de Manihot ssp. O estudo demonstrou que com a exclusão do grupo dos descritores Mínimos obteve resultados de aproximadamente 92% de similaridade se comparados com o uso de todos os... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversidade Genética; Manihot esculenta; Genética Vegetal. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902011000400012 |
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| Leonel,Magali; Freitas,Taila Santos de; Mischan,Martha Maria. |
| Considering the importance of cassava starch for Brazilian industries, the current work aimed at evaluating the effects of extrusion parameters on the physical characteristics, mainly viscosity properties of extruded cassava starch. A factorial central composite design (2³) with three independent variables and the response surface methodology were used to evaluate the results of expansion index, specific volume, water absorption index, water solubility index, color and paste properties, according to the variations in the moisture content, barrel temperature and screw speed. Results indicated that barrel temperature influenced the expansion index, specific volume, water absorption index, all the color parameters, the initial viscosity, peak and final... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Modified starch; Extrusion; Viscosity. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000400009 |
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| MILÉO,L.J.; SILVA,J.F.; ALBERTINO,S.M.F.; LEITE,B.N.; MENEZES,D.S.; SANTOS,A.F.. |
| ABSTRACT This study has aimed to carry out a phytosociological survey of weeds in different collection periods, in cassava crops of two varieties grown in two consecutive years. The varieties were Pão, of the sweet class, and Racha-terra, of the bitter class. The weeds surveys were performed at 28, 56, 84, 112, 140, 168, 196, 224, 252, 280 and 308 days after planting in the experimental units of each variety. For weeds sampling, a sampler with an area of 0.25 m2 released twice at random in the floor area of the treatments was used. The phytosociological survey quantified 5,708 individuals distributed in 17 families, represented by 32 species, of which 25 were dicotyledonous and seven were monocotyledonous. The most representative families in number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Tillage; Manihot esculenta. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000200267 |
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| Silva,Tiago Santos; Silva,Paulo Sérgio Lima e; Braga,Jéfferson Dantas; Silveira,Lindomar Maria da; Sousa,Roberto Pequeno de. |
| In Mata Fresca, an area located on the border of the states of Rio Grande do Norte and Ceará, in Brazil, small farmers have a source of income from the production of cassava roots, using planting densities of around 5,000 plants ha-1. This procedure might be helping to limit higher yields of the roots, since some studies have shown that it is possible to obtain higher yields of cassava using higher densities. The objective of this study was to evaluate the root yield and other characteristics of the cassava, as a response to planting density. The Vermelhinha cultivar was submitted to planting densities of from 5,000 to 21,000 plants ha-1, at intervals of 2,000 plants ha-1, in an experiment under irrigation. A completely randomized block design with four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Spacing; Plant populations. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000200014 |
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| Pheophanh Soysouvanh; Nutcharee Siri. |
| Four cassava varieties, Kasetsart 50, Huay Bong 60, Rayong 9 and Rayong 72 were observed for mealybug in a survey that was conducted in Kalasin Province, Khon Kaen province and Udon Thani Province from November 2011 to September 2012. The infestation of pink mealybug was counted in five levels, 0 level 0 mealybug, 1st level (1-9), 2nd level (10-99), 3rd level (100-999) and 4th level (≥1,000). On the other hand, leaf curl level was categorized into five scores as follows; margin declined slightly was categorized at normal was categorized at level 0, margin declined slightly at level 1, shoot stunted at level 2, shoot distorted at level 3 and leaves fall at level 4. Rayong 72 variety showed the highest population of mealybug at 25.5% (MbL1) and 22.5 % (MbL2)... |
| Tipo: PhysicalObject |
Palavras-chave: Cassava; Manihot esculenta; Kasetsart 50 variety; Huay Bong 60 variety; Rayong 9 variety; Rayong 72 variety; Natural enemies; Pink mealybug; Phenacoccus manihoti; Cassava mealybug; Pest survey; Population abundance survey; Northeast; มันสำปะหลัง; พันธุ์เกษตรศาสตร์ 50; พันธุ์ห้วยบง 60; พันธุ์ระยอง 9; พันธุ์ระยอง 72; ศัตรูพืช; เพลี้ยแป้ง; การสำรวจศัตรูพืช; ภาคตะวันออกเฉียงเหนือ. |
| Ano: 2013 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5816 |
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| Ortiz,Alex Henrique Tiene; Vidigal Filho,Pedro Soares; Rocha,Vanesca Priscila Camargo; Ferreira,Rebecca Caroline Ulbricht; Gonçalves,Tiago Maretti; Gonçalves-Vidigal,Maria Celeste. |
| Abstract The objective of this work was to screen sweet cassava accessions collected in smallholding areas in the Midwestern, Southeastern and Southern regions of Brazil, using 15 SSR molecular markers, to determine population structure and genetic diversity. Polymorphism was detected in every loci analyzed, with mean of 6.33 alleles per locus, and mean polymorphism information content (PIC) of 0.6057, pointing out that the primers were highly informative. The observed heterozygosity ranged from 0.0709 (SSRY 101) to 0.9398 (GA 12), with a mean of 0.6511, and mean genetic diversity of 0.6578, ranging from 0.3592 (GA 136) to 0.8116 (SSRY 21). The most dissimilar combinations observed were BGM526PR-BGM596MS, BGM526PR-BGM622MS and BGM526PR-BGM629MS. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Germplasm characterization; Genetic variability; SSR markers. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100206 |
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| ÁLVARES, V. de S.; SOUZA, J. M. L. de; SOUZA, G. S. de. |
| A IG é uma estratégia inovadora que constitui uma forma especial de proteção aos produtos e visa, principalmente, distinguir a origem de um produto por meio da identificação da área de produção. Em um mundo de relações econômicas globalizadas, as IGs possibilitam salvaguardar características locais e regionais dos produtos, valorizando e atestando seus níveis de qualidade, os quais são fruto dos fatores naturais de uma área delimitada e daqueles relacionados à intervenção do homem. A IG é um ativo intangível que pode representar o primeiro passo para dar ao produto um valor cultural agregado. É um direito relativo à propriedade industrial estabelecido na Lei 9.279/1996, que pode ser classificado em dois tipos: indicação de procedência (IP), isto é, a... |
| Tipo: Capítulo em livro técnico (INFOTECA-E) |
Palavras-chave: Indicação geográfica; Produção artesanal; Território da Cidadania; Regional do Juruá; Cruzeiro do Sul (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Harina de yuca; Tecnología tradicional.; Denominación de origen protegida; Economía de la producción; Explotación agrícola familiar; Agricultura familiar; Farinha; Mandioca; Manihot esculenta; Procedência; Desenvolvimento socio-econômico; Family farms; Cassava flour; Traditional technology; Protected designation of origin; Provenance; Production economics.. |
| Ano: 2017 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1086107 |
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| Venturini,Marcela Tonini; Santos,Vanderlei da Silva; Oliveira,Eder Jorge de. |
| Abstract: The objective of this work was to define procedures to assess the tolerance of cassava genotypes to postharvest physiological deterioration (PPD) and to microbial deterioration (MD). Roots of six cassava genotypes were evaluated in two experiments, during storage under different environmental conditions: high temperature and low soil moisture; or low temperature and high soil moisture. Roots were treated or not with fungicide (carbendazim) before storage. Genotype reactions to MD and PPD were evaluated at 0, 2, 5, 10, 15, 20, and 30 days after harvest (DAH), in the proximal, medial, and distal parts of the roots. A diagrammatic scale was proposed to evaluate nonperipheral symptoms of PPD. Fungicide treatment and root position did not influence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Genotype screening; Microbial deterioration; Procedure standardization; Shelf life; Storage conditions. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000700562 |
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| Registros recuperados: 156 | |
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