scholarly journals Phosphate solubilization and phytohormone production by endophytic and rhizosphere Trichoderma isolates of guanandi (Calophyllum brasiliense Cambess)

2014 ◽  
Vol 8 (27) ◽  
pp. 2616-2623 ◽  
Author(s):  
Paixo Resende Mara ◽  
Cristina Mendona Cardoso Jakoby Isabel ◽  
Carlos Ramos dos Santos Luiz ◽  
Antnio Soares Marcos ◽  
Dionsio Pereira Flvia ◽  
...  
Keyword(s):  
Phosphate Solubilization ◽  
Calophyllum Brasiliense ◽  
Trichoderma Isolates

Activity of (-) mammea A/BB from the Leaves of Calophyllum brasiliense on Mycobacterium tuberculosis

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
CT Pires ◽  
MA Brenzan ◽  
RB Scodro ◽  
VD Carrara ◽  
LC Filho ◽  
...  
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Calophyllum Brasiliense

Sidrophore Production and Phosphate Solubilization by Bacillus cereus and Pseudomonas fluorescens Isolated from Iraqi Soils and Soil Characterization

2018 ◽  
Vol 9 (4) ◽  
Author(s):  
Zaid Raad Abbas ◽  
Aqeel Mohammed Majeed Al-Ezee ◽  
Sawsan H
Keyword(s):  
Bacillus Cereus ◽  
Pseudomonas Fluorescens ◽  
Phosphate Solubilization ◽  
Bacterial Species ◽  
Nutrient Status ◽  
Bacterial Count ◽  
Soil Samples ◽  
Phosphate Solubilizing Bacteria ◽  
Clear Zone ◽  
Zone Formation

This study was conducted to explore the ability of Pseudomonas fluorescens and Bacillus cereus to solubilizing a phosphate in soil for enhancing the planting growth and, its relation with soill characterization. The isolates were identified as P.fluorescens and B. cereus using convential analysis and, its phosphate solubilization ability and sidrophore was shown by the clear zone formation on National Botanical Research Institute���s Phosphate medium. Moreover, Pseudomonas fluorescens isolates (n = 9) and three of B. cereus isolated from agricultural area in Baghdad university, Mustansiriyah university and Diyala bridge. Results displayed that bacterial count were varied in soil samples according to their region, and ranging from 30 to 60 *10 2 CFU/g in Baghdad university soil to 10���20 *10 2 CFU/g in Mustansiriyah university soil, the Baghdad soil macronutrient which included: NH4, NO3, P, and K were, 8.42, 20.53, 19.09, 218.73 respectively, While the physio analysis revealed that the mean of pH was 7.3 and EC was 8.63. on the other hand the micronutrient analysis indicated that the soil samples were included Ca, Fe, Mn, Zn and Cu which gave their mean 5025.9, 8.9, 4.9, 0.5 and 1.5 respectevily. Results revealed that all isolated bacteria (9 isolates of P.fluorescens and three isolates of B. cereus gave ahalo zone which mean their ability to be phosphate solubilizing bacteria at 100%. Results revealed that all isolated bacteria were detected a ability to produce high levels from chelating agents (siderophores)) by P.fluorescens and. B cereus at 100%, when appeared ahalo clear zone. Furthermore, the high levels of phosphate solubilization and siderophore production were grouped in bacterial species isolated from Iraqi soils. might be attributed to many soil factors such as soil nutrient status, soil acidity, water content, organic matter and soil enzyme activities.

scholarly journals Genomic characterization and computational phenotyping of nitrogen-fixing bacteria isolated from Colombian sugarcane fields

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Luz K. Medina-Cordoba ◽  
Aroon T. Chande ◽  
Lavanya Rishishwar ◽  
Leonard W. Mayer ◽  
Lina C. Valderrama-Aguirre ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Nitrogen Fixation ◽  
Plant Growth ◽  
Phosphate Solubilization ◽  
Nitrogen Fixing ◽  
Nitrogen Fixing Bacteria ◽  
Promising Tool ◽  
A Genome ◽  
Plant Growth Promoting ◽  
Growth Promoting

AbstractPrevious studies have shown the sugarcane microbiome harbors diverse plant growth promoting microorganisms, including nitrogen-fixing bacteria (diazotrophs), which can serve as biofertilizers. The genomes of 22 diazotrophs from Colombian sugarcane fields were sequenced to investigate potential biofertilizers. A genome-enabled computational phenotyping approach was developed to prioritize sugarcane associated diazotrophs according to their potential as biofertilizers. This method selects isolates that have potential for nitrogen fixation and other plant growth promoting (PGP) phenotypes while showing low risk for virulence and antibiotic resistance. Intact nitrogenase (nif) genes and operons were found in 18 of the isolates. Isolates also encode phosphate solubilization and siderophore production operons, and other PGP genes. The majority of sugarcane isolates showed uniformly low predicted virulence and antibiotic resistance compared to clinical isolates. Six strains with the highest overall genotype scores were experimentally evaluated for nitrogen fixation, phosphate solubilization, and the production of siderophores, gibberellic acid, and indole acetic acid. Results from the biochemical assays were consistent and validated computational phenotype predictions. A genotypic and phenotypic threshold was observed that separated strains by their potential for PGP versus predicted pathogenicity. Our results indicate that computational phenotyping is a promising tool for the assessment of bacteria detected in agricultural ecosystems.

scholarly journals Florística e estrutura do componente arbustivo-arbóreo de uma floresta higrófila da bacia do rio Jacaré-Pepira, SP, Brasil

2003 ◽  
Vol 17 (4) ◽  
pp. 495-506 ◽  
Author(s):  
Márcia C. M. Marques ◽  
Sandro Menezes Silva ◽  
Alexandre Salino
Keyword(s):  
Sao Paulo ◽  
São Paulo ◽  
Calophyllum Brasiliense

As florestas higrófilas são formações ribeirinhas caracterizadas por ocorrerem em solo permanentemente encharcado e restritas a pequenos fragmentos junto a outros tipos vegetacionais. Neste trabalho caracterizaram-se a florística e a estrutura do componente arbustivo-arbóreo (plantas com DAP>5cm) de uma área de 0,36ha de floresta higrófila localizada em Brotas (48º06'W 22º16'S, 470m.s.m.), Estado de São Paulo, usando-se método de parcelas (total de 24 parcelas). No total foram amostrados 735 indivíduos, distribuídos em 32 famílias e 51 espécies. As espécies que se destacaram na comunidade devido aos elevados valores de importância foram Calophyllum brasiliense Camb., Protium almecega L. Marchand, Podocarpus sellowii Klotzch., Tapirira guianensis Aubl. e Dendropanax cuneatum DC. Decne. & Planch. O índice de diversidade de Shannon foi igual a 2,81, valor pouco superior aos descritos para florestas semelhantes. Na comunidade, as espécies generalistas com relação ao encharcamento do solo e as de solo drenado contribuíram na riqueza total (juntas 62% do total de espécies amostradas), enquanto as espécies de solo encharcado tiveram maior contribuição na composição da dominância (66% da dominância total) e densidade (67% da densidade total) relativas. A diversidade de situações topográficas e a entrada de espécies da vegetação do cerrado adjacente permitiram que espécies com diferentes exigências hídricas se estabelecessem na área relativamente pequena da floresta e influenciaram fortemente a florística e estrutura da comunidade.

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