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| Registros recuperados: 18 | |
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| CHALITA,Patrícia Bombonati; FARIAS,Eliane do Nascimento Cunha; COSTA,Ismaele Breckenfeld da; SOUSA,Brenda Ferreira; SANTOS,Marco Antônio Oliveira dos; ALBUQUERQUE,Teresinha Costa Silveira de; VITAL,Marcos José Salgado; SILVA,Krisle da. |
| ABSTRACT Brazil nut is a very important nontimber forest product in the Amazon region. Propagation of this tree still represents a challenge due to slow and uneven seed germination. In this context, plant growth-promoting bacteria can facilitate the process of propagation. The aims of this study were to isolate and characterize endophytic bacteria from the roots of Brazil nut trees in native terra firme forest and cultivation areas in northern Brazil, and to identify mechanisms by which bacteria act in plant growth promotion. Overall, 90 bacterial isolates were obtained from the roots of Brazil nut trees in monoculture, agroforestry and native forest areas by using different semisolid media. The isolates were characterized by sequencing the 16S rRNA gene.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 16S rRNA; Phosphate solubilization; Indole compounds; Biological nitrogen fixation; Plant growth-promotion bacteria; Amazon. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400257 |
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| OLIVEIRA,Danyllo Amaral de; FERREIRA,Solange da Cunha; CARRERA,Daiany Larissa Ribeiro; SERRÃO,Cleyson Pantoja; CALLEGARI,Daihany Moraes; BARROS,Nicolle Louise Ferreira; COELHO,Francinilson Meireles; SOUZA,Cláudia Regina Batista de. |
| ABSTRACT Despite advances in the identification and characterization of endophytic bacteria in various plant species worldwide, little is known about such microorganisms in plants from the Amazon region. Previous studies reported that Piper tuberculatum endophytic Pseudomonas (isolates Pt12 and Pt13, identified as Pseudomonas putida and Pseudomonas sp., respectively) were able to inhibit the in vitro growth of Fusarium solani f. sp. piperis, which causes root rot in black pepper (Piper nigrum), and that Pt13 promoted the growth of P. nigrum. Therefore, the aim here was to characterize these bacteria regarding their ability to produce plant growth-promoting substances [siderophores, indol acetic acid (IAA) and soluble phosphate]. Chrome azurol S assays were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant growth-promoting bacterial endophytes; IAA; Siderophores; Phosphate solubilization. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672021000100010 |
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| Barroso,Cinthya Babá; Nahas,Ely. |
| The present study deals with the effect of increased concentrations of alcohols (methanol and ethanol) on the solubilization of FePO4 and CaHPO4 by Aspergillus niger. The efficiency of solubilization (ES) of inorganic phosphates, fungal growth, acid production and pH variation were determined. The concentrations of alcohols that most favored the solubilization of phosphates were 4% methanol and 3% ethanol. The ES of phosphates by the fungus in media containing methanol ranged from 11-96% and 0.4-87% for ethanol. The stimulation or inhibition of solubilization was dependent on greater or lesser fungus growth, acid production and decreased pH. These responses were supported by the correlation between the amount of phosphate dissolved and fungal growth... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ethanol; Methanol; Growth; Acid production; Phosphate solubilization. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000200003 |
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| Souchie,Edson L.; Azcón,Rosario; Barea,Jose M.; Silva,Eliane M.R.; Saggin-Júnior,Orivaldo J.. |
| This study evaluated the synergism between several P-solubilizing fungi isolates and arbuscular mycorrhizal fungi to improve clover ( Trifolium pratense) growth in the presence of Araxá apatite. Clover was sown directly in plastic pots with 300g of sterilized washed sand, vermiculite and sepiolite 1:1:1 (v:v:v) as substrate, and grown in a controlled environment chamber. The substrate was fertilized with 3 g L-1 of Araxá apatite. A completely randomized design, in 8×2 factorial scheme (eight P-solubilizing fungi treatments with or without arbuscular mycorrhizal fungi)and four replicates were used. The P-solubilizing fungi treatments consisted of five Brazilian P-solubilizing fungi isolates (PSF 7, 9, 20, 21 and 22), two Spanish isolates ( Aspergillus niger... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Araxá apatite; Phosphate solubilization; Co-inoculation; Plant growth promotion; Rhizosphere. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000300023 |
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| Vasconcellos,Rafael Leandro Figueiredo de; Silva,Mylenne Calciolari Pinheiro da; Ribeiro,Carlos Marcelo; Cardoso,Elke Jurandy Bran Nogueira. |
| Actinobacteria are capable of playing several different roles in soil ecosystems. These microorganisms affect other organisms by producing secondary metabolites and are responsible for the degradation of different complex and relatively recalcitrant organic compounds. In our survey of actinobacteria isolated from the rhizosphere of Araucaria angustifolia, five culture media (AI, WYE, YCED, MSSC and LNMS) were compared for their effectiveness in isolating these microorganisms. When summing up all the isolates randomly obtained, we got 103 isolates. After isolation, the phosphate-solubilizing ability and the "in vitro" production of indole-acetic acid and chitinases were evaluated. The AI medium was ineffective for actinobacteria isolation, when it was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil Pine; Selective culture media; Indole-acetic acid; Chitinase; Phosphate solubilization. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000600019 |
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| Barroso,Cinthya Babá; Pereira,Gener Tadeu; Nahas,Ely. |
| The solubilization of inorganic phosphates by microorganisms supplies phosphates for plant nutrition and increases their growth. The solubilization of CaHPO4 (Ca-P) and AlPO4 (Al-P) by Aspergillus niger using several carbon and nitrogen sources was studied. Solubilization of Ca-P was enhanced when the carbon sources were mannitol, maltose, galactose and glucose (in that order). Galactose, sucrose and maltose were the carbon sources that enhanced the solubilization of Al-P. More extensive growth, acid production, and decrease in pH were obtained in the Al-P medium than in the Ca-P medium, however, the quantity of solubilized phosphate was 12% less. Phosphate solubilization was related to acid production, pH drop and fungal growth in the culture medium. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrition; Phosphorus; Phosphate source; Phosphate solubilization; Titratable acidity. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000400006 |
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| Chauhan,Anjali; Guleria,Shiwani; Balgir,Praveen P.; Walia,Abhishek; Mahajan,Rishi; Mehta,Preeti; Shirkot,Chand Karan. |
| Abstract Aneurinibacillus aneurinilyticus strain CKMV1 was isolated from rhizosphere of Valeriana jatamansi and possessed multiple plant growth promoting traits like production of phosphate solubilization (260 mg/L), nitrogen fixation (202.91 nmol ethylene mL-1 h-1), indole-3-acetic acid (IAA) (8.1 µg/mL), siderophores (61.60%), HCN (hydrogen cyanide) production and antifungal activity. We investigated the ability of isolate CKMV1 to solubilize insoluble P via mechanism of organic acid production. High-performance liquid chromatography (HPLC) study showed that isolate CKMV1 produced mainly gluconic (1.34%) and oxalic acids. However, genetic evidences for nitrogen fixation and phosphate solubilization by organic acid production have been reported first time... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Valeriana jatamansi; Phosphate solubilization; Nitrogen fixation; Glucose dehydrogenase; Aneurinibacillus aneurinilyticus; PGPR. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000200294 |
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| Registros recuperados: 18 | |
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