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| Silva Neto,Manoel Luiz da; Smiderle,Oscar José; Silva,Krisle da; Fernandes Júnior,Paulo Ivan; Xavier,Gustavo Ribeiro; Zilli,Jerri Édson. |
| O objetivo deste trabalho foi avaliar a compatibilidade do tratamento de sementes com fungicidas e a inoculação com estirpes de Bradyrhizobium em feijão-caupi. Em laboratório, avaliou-se a sobrevivência de células nas sementes da cultivar BRS Guariba, tratadas ou não com fungicidas (fludioxonil, carbendazim, carbendazim + thiram e carboxin + thiram) e inoculadas ou não com Bradyrhizobium (estirpes UFLA3-84, BR 3267, INPA3-11B e BR 3262). Em casa de vegetação, conduziu-se experimento em vasos de Leonard, com os mesmos tratamentos. Foram avaliados: massa de matéria seca da parte aérea, além de número e massa de nódulos 25 dias após a emergência das plantas. No campo, dois experimentos foram conduzidos, tendo-se utilizado a estirpe BR 3262, com aplicação de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bradyrhizobium; Vigna unguiculata; Fixação biológica de nitrogênio; Nodulação. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000100011 |
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| Vergara,Carlos; Araujo,Karla Emanuelle Campos; Alves,Luiziene Soares; Souza,Sônia Regina de; Santos,Leandro Azevedo; Santa-Catarina,Claudete; Silva,Krisle da; Pereira,Gilmara Maria Duarte; Xavier,Gustavo Ribeiro; Zilli,Jerri Édson. |
| ABSTRACT The use of dark septate fungi (DSE) to promote plant growth can be beneficial to agriculture, and these organisms are important allies in the search for sustainable agriculture practices. This study investigates the contribution of dark septate fungi to the absorption of nutrients by rice plants and their ensuing growth. Four dark septate fungi isolates that were identified by Internal transcribed spacer phylogeny were inoculated in rice seeds (Cv. Piauí). The resulting root colonization was estimated and the kinetic parameters Vmax and Km were calculated from the nitrate contents of the nutrient solution. The macronutrient levels in the shoots, and the NO3--N, NH4+-N, free amino-N and soluble sugars in the roots, sheathes and leaves were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa L.; DSE; NO3−-N; Tillering; Colonization. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000100067 |
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| Silva,Krisle da; Nóbrega,Rafaela Simão Abrahão; Lima,Adriana Silva; Barberi,Alexandre; Moreira,Fatima Maria de Souza. |
| Non-symbiotic diazotrophic bacteria are amongst the most important functional groups of soil-dwelling microorganisms. These bacteria contribute to plant growth predominantly through biological N2 fixation. Here, we evaluated the density and diversity of non-symbiotic diazotrophic bacteria in soils taken from diverse land use systems (LUS) in Amazonia using nitrogen-free media. A total of 30 soil samples were collected from the following LUS: pristine forest, young secondary forest, old secondary forest, agroforestry, agriculture and pasture. Bacterial density was evaluated by the most probable number (MPN) method utilizing N-free semi-solid media with varied compositions (JNFb, NFb, LGI and Fam). Individual isolates were characterized by colony and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Burkholderia sp.; Enterobacter sp.; Serratia sp.; Bacillus sp.; Klebsiella sp.. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500002 |
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| Ferreira,Paulo Ademar Avelar; Dahmer,Sabrina de Fatima Barbosa; Backes,Tais; Silveira,Andressa de Oliveira; Jacques,Rodrigo Josemar Seminoti; Zafar,Mohsin; Pauletto,Eloy Antonio; Santos,Marco Antônio Oliveira dos; Silva,Krisle da; Giachini,Admir José; Antoniolli,Zaida Inês. |
| ABSTRACT: Areas affected by coal mining can be recovered by revegetation with leguminous plants associated with nitrogen-fixing bacteria. This study addressed the isolation and characterization of native nitrogen-fixing bacteria from coalmine wasteland under different vegetation restoration approaches using Macroptilium atropurpureum (DC) Urb and Vicia sativa L. as trap plants. The bacteria were characterized and identified on the basis of 16S rRNA sequences. Additionally, nitrogen-fixing strains were characterized for tolerance to high heavy metal and low pH levels, as well as for their effect on growth, nodulation, and symbiotic efficiency of M. atropurpureum and V. sativa. Soil samples were taken from the rhizosphere of eight areas, between 6 and 20... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; 16S rRNA; Rhizobium; Bradyrhizobium; Burkholderia. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100420 |
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