1
|
Nascimento AP, Costa Neto PQ, Almeida LN, Vieira LFS, Matos Júnior WA, Ferreira CC, Bezerra CS, Casas LL, Atroch AL, Pereira JO. Guarana propagation strategies: a review. BRAZ J BIOL 2023; 83:e275940. [PMID: 38126638 DOI: 10.1590/1519-6984.275940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023] Open
Abstract
Guarana [Paullinia cupana var. sorbilis (Mart.) Ducke] is a species of great economic and social important in Brazil, as it is the only commercial guarana producer in the world. The vegetative propagation method indicated for the culture is stem cuttings, which aims at productivity, tolerance, and uniformity of clonal cultivars, because reproduction by seeds has slow germination and high genetic variability, which in traditional varieties is an undesirable factor. Genetic factors can interfere with the rooting capacity of the crop. Studies seek alternatives that can improve this condition and enhance the production system. Use of growth regulators, microorganisms that promote plant growth, variation of substrates and fertilization, have been strategies used. Preliminary tests on the rate of stem rooting and seed germination with the use of exogenous phytohormone did not demonstrate in relation to the non-application of these inducers. The use of rhizobacteria, which presents itself as a promising activity in many cultures, has not yet been demonstrated in the culture of guarana. On the other hand, the influence of different substrates on rooting has already shown consistent results as a function of rooting rate. Fertilizing the mother plants as recommended by the production system for the crop has proven to be an efficient procedure. There are still few studies aimed at improving the spread of guarana, demonstrating that new protocols need to be explored, or that the protocols already used are reviewed from another perspective.
Collapse
Affiliation(s)
- A P Nascimento
- Universidade Federal do Amazonas - UFAM, Programa de Pós-graduação em Biotecnologia, Manaus, AM, Brasil
| | - P Q Costa Neto
- Universidade Federal do Amazonas - UFAM, Faculdade de Ciências Agrárias, Laboratório de Princípios Bioativos de Origem Microbiana, Manaus, AM, Brasil
| | - L N Almeida
- Universidade Federal do Amazonas - UFAM, Faculdade de Ciências Agrárias, Laboratório de Princípios Bioativos de Origem Microbiana, Manaus, AM, Brasil
| | - L F S Vieira
- Universidade Federal do Amazonas - UFAM, Faculdade de Ciências Agrárias, Laboratório de Princípios Bioativos de Origem Microbiana, Manaus, AM, Brasil
| | - W A Matos Júnior
- Universidade Federal do Amazonas - UFAM, Faculdade de Ciências Agrárias, Laboratório de Princípios Bioativos de Origem Microbiana, Manaus, AM, Brasil
| | - C C Ferreira
- Universidade Federal do Amazonas - UFAM, Faculdade de Ciências Agrárias, Laboratório de Princípios Bioativos de Origem Microbiana, Manaus, AM, Brasil
| | - C S Bezerra
- Universidade Federal do Amazonas - UFAM, Faculdade de Ciências Agrárias, Laboratório de Princípios Bioativos de Origem Microbiana, Manaus, AM, Brasil
| | - L L Casas
- Universidade Federal do Amazonas - UFAM, Faculdade de Ciências Agrárias, Laboratório de Princípios Bioativos de Origem Microbiana, Manaus, AM, Brasil
| | - A L Atroch
- Embrapa Amazônia Ocidental, Manaus, AM, Brasil
| | - J O Pereira
- Universidade Federal do Amazonas - UFAM, Faculdade de Ciências Agrárias, Laboratório de Princípios Bioativos de Origem Microbiana, Manaus, AM, Brasil
| |
Collapse
|
2
|
Casas LL, Azevedo JL, Almeida LN, Costa-Neto PQ, Bianco RA, Pereira JO. Mycoviruses infecting Colletotrichum spp.: A comprehensive review. BRAZ J BIOL 2021; 83:e248975. [PMID: 34550289 DOI: 10.1590/1519-6984.248975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 05/07/2021] [Indexed: 08/30/2023] Open
Abstract
Colletotrichum is one of the most economically important fungal genera, which affects a wide range of hosts, specifically tropical and subtropical crops. Thus far, there have been several records of mycovirus infection in Colletotrichum spp., primarily by viruses of the Partitiviridae family. There have also been records of infections by mycoviruses of the Chrysoviridae family. Mycoviruses are (+)ssRNA and dsRNA genome viruses, which may or may not be enveloped. To date, no mycovirus with a DNA genome has been isolated from Colletotrichum spp. Typically, mycoviruses cause latent infections, although hypo- and hypervirulence have also been reported in Colletotrichum spp. In addition to its effects on pathogenic behavior, mycovirus infection can lead to important physiological changes, such as altered morphological characteristics, reduced vegetative growth, and suppressed conidia production. Therefore, research on mycoviruses infecting phytopathogenic fungi can help develop alternative methods to chemical control, which can cause irreversible damage to humans and the environment. From an agricultural perspective, mycoviruses can contribute to sustainable agriculture as biological control agents via changes in fungal physiology, ultimately resulting in the total loss of or reduction in the virulence of these pathogens.
Collapse
Affiliation(s)
- L L Casas
- Universidade do Estado do Amazonas - UEA, Programa de Pós-graduação em Biodiversidade e Biotecnologia - Bionorte, Manaus, AM, Brasil
| | - J L Azevedo
- Universidade de São Paulo - USP, Escola Superior de Agricultura Luiz de Queiroz, Piracicaba, SP, Brasil
| | - L N Almeida
- Universidade Federal do Amazonas - UFAM, Faculdade de Ciências Agrárias, Manaus, AM, Brasil
| | - P Q Costa-Neto
- Universidade Federal do Amazonas - UFAM, Faculdade de Ciências Agrárias, Manaus, AM, Brasil
| | - R A Bianco
- Centro Universitário do Norte - Uninorte, Manaus, AM, Brasil
| | - J O Pereira
- Universidade Federal do Amazonas - UFAM, Faculdade de Ciências Agrárias, Manaus, AM, Brasil
| |
Collapse
|
3
|
Pereira JO, Rocha JM, Pinto WBCC, Moreira CTS. Reduction of scum production in a modified UASB reactor treating domestic sewage. Water Sci Technol 2019; 79:1657-1666. [PMID: 31241471 DOI: 10.2166/wst.2019.155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The scum accumulation inside gas-solid-liquid separators (GSL) is one of the main limitations of upflow anaerobic sequencing batch (UASB) reactors during treatment of domestic sewage. Although this type of reactor can be equipped with devices that periodically remove scum, this solution has been proved to be very expensive in addition to being inefficient when discharging procedures are not correctly performed. The main goal of this study was to investigate the performance of a modified UASB reactor concept with a GSL separator which promotes continuous scum discharge to the settling compartment. Furthermore, this proposal was compared with a conventional UASB reactor which was used as control. Both reactors in demo-scale were fed with domestic wastewater and scum production was measured. The results demonstrated volumetric reduction of 50%, and 75% reduction in the mass of total solids in the modified reactor. Additionally, the amount of biogas recovered from the modified reactor was higher than the amount that the control reactor recovered. Therefore, the proposed modification has been proved to be effective, bringing new possibilities to the GSL project.
Collapse
Affiliation(s)
- J O Pereira
- Department of Civil Engineering Technology, Federal University of São João del-Rei, Campus Alto Paraopeba, 36420-000, Ouro Branco, Minas Gerais, Brazil E-mail:
| | - J M Rocha
- Department of Civil Engineering Technology, Federal University of São João del-Rei, Campus Alto Paraopeba, 36420-000, Ouro Branco, Minas Gerais, Brazil E-mail:
| | - W B C C Pinto
- Department of Civil Engineering Technology, Federal University of São João del-Rei, Campus Alto Paraopeba, 36420-000, Ouro Branco, Minas Gerais, Brazil E-mail:
| | - C T S Moreira
- Department of Civil Engineering Technology, Federal University of São João del-Rei, Campus Alto Paraopeba, 36420-000, Ouro Branco, Minas Gerais, Brazil E-mail:
| |
Collapse
|
4
|
Teles YV, de Castro LM, Sargentini Junior É, do Nascimento AP, da Silva HA, Costa RS, do Nascimento Souza RD, da Mota AJ, Pereira JO. Potential of Bacterial Isolates from a Stream in Manaus-Amazon to Bioremediate Chromium-Contaminated Environments. Water Air Soil Pollut 2018; 229:266. [PMID: 30147191 PMCID: PMC6096555 DOI: 10.1007/s11270-018-3903-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 07/01/2018] [Indexed: 05/28/2023]
Abstract
Igarapé do Quarenta (IgQ), a stream located in the Manaus-AM, BR, has directly experienced the impacts of urban expansion over the last five decades, which contributed for its contamination. As an affluent of Rio Negro, IgQ also affects the water quality of this important river that bathes Manaus. However, the stress caused by the prolonged exposition to chemical agents may have selected microorganisms that exhibit great bioremediation potential. In the present study, bacteria isolated from four distinct sites of the IgQ were identified, and their potential to degrade hexavalent chromium (Cr(VI)) was investigated using the s-diphenylcarbazide method. Among the investigated isolates, 14 exhibited resistance against Cr(VI) at a concentration of 300 mg/L and eight isolates reduced over 50% (53.5-97.4%) chromium ratios after 72 h of incubation. Those isolates were identified by gene sequencing and classified in 10 genera (Acidovorax sp., Acinetobacter sp., Alicycliphilus sp., Bacillus sp., Comamonas sp., Enterobacter sp., Micrococcus sp., Proteus sp., Serratia sp., and Vagococcus sp.). Under control conditions, the isolate of Vagococcus sp. genus, in only 24 h of incubation, reduced 96.8% of the rate of Cr(VI) added to the culture medium at the concentration of 10 mg/L. Obtained results indicate that the Vagococcus sp. exhibits a great potential to be used in the bioremediation of areas contaminated with chromium. The mechanisms of action of microorganisms should be investigated for more specific applications in the decontamination of effluents and direct use of its by-products to bioremediate polluted environments.
Collapse
Affiliation(s)
- Ydrielly Veras Teles
- Universidade Federal do Amazonas, Av. General Rodrigo Octávio Jordão Ramos, 1200, Manaus, Amazonas Brazil
| | - Lorena Mota de Castro
- Universidade Federal do Amazonas, Av. General Rodrigo Octávio Jordão Ramos, 1200, Manaus, Amazonas Brazil
| | - Ézio Sargentini Junior
- Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo, 2396, Manaus, Amazonas Brazil
| | | | - Henrique Alves da Silva
- Universidade Federal do Amazonas, Av. General Rodrigo Octávio Jordão Ramos, 1200, Manaus, Amazonas Brazil
| | - Rebeca Silveira Costa
- Universidade do Estado do Amazonas, Av. Djalma Batista, 2470, Manaus, Amazonas Brazil
| | | | - Adolfo José da Mota
- Universidade Federal do Amazonas, Av. General Rodrigo Octávio Jordão Ramos, 1200, Manaus, Amazonas Brazil
| | - José Odair Pereira
- Universidade Federal do Amazonas, Av. General Rodrigo Octávio Jordão Ramos, 1200, Manaus, Amazonas Brazil
| |
Collapse
|
5
|
Batista BD, Lacava PT, Ferrari A, Teixeira-Silva NS, Bonatelli ML, Tsui S, Mondin M, Kitajima EW, Pereira JO, Azevedo JL, Quecine MC. Screening of tropically derived, multi-trait plant growth- promoting rhizobacteria and evaluation of corn and soybean colonization ability. Microbiol Res 2018; 206:33-42. [PMID: 29146258 DOI: 10.1016/j.micres.2017.09.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 09/18/2017] [Indexed: 01/10/2023]
Abstract
The present study assessed the plant growth-promoting (PGP) traits and diversity of culturable rhizobacteria associated with guarana (Paullinia cupana), a typical tropical plant. Ninety-six bacteria were isolated, subjected to biochemical tests, and identified by partial or total 16S rDNA sequencing. Proteobacteria and Firmicutes were the dominant rhizospheric phyla found, and Burkholderia and Bacillus were the most abundant genera. Thirteen strains exhibited the four PGP traits evaluated, and most of them belonged to the genus Burkholderia. Two multi-trait PGP strains, RZ2MS9 (Bacillus sp.) and RZ2MS16 (Burkholderia ambifaria), expressively promoted corn and soybean growth under greenhouse conditions. Compared to the non-inoculated control, increases in corn root dry weight of 247.8 and 136.9% were obtained with RZ2MS9 and RZ2MS16 inoculation, respectively, at 60days after seeding. The dry weights of corn and soybean shoots were significantly higher than those of non-inoculated plants, showing increases of more than 47% for both strains and crops. However, soybean root dry weight did not increased after bacterial inoculation with either strain. The colonization behavior of RZ2MS16 was assessed using GFP-labeling combined with fluorescence microscopy and a cultivation-based approach for quantification. RZ2MS16:gfp was able to colonize the roots and shoots of corn and soybean, revealing an endophytic behavior.
Collapse
Affiliation(s)
- Bruna Durante Batista
- Department of Genetics, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, - SP, Brazil
| | - Paulo Teixeira Lacava
- Department of Morphology and Pathology, Center for Biological and Health Sciences, Federal University of São Carlos, São Carlos, - SP, Brazil
| | - Andrea Ferrari
- Department of Genetics, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, - SP, Brazil
| | - Natalia Sousa Teixeira-Silva
- Department of Genetics, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, - SP, Brazil
| | - Maria Letícia Bonatelli
- Department of Genetics, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, - SP, Brazil
| | - Sarina Tsui
- Department of Genetics, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, - SP, Brazil
| | - Mateus Mondin
- Department of Genetics, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, - SP, Brazil
| | - Elliot Watanabe Kitajima
- Department of Plant Pathology and Nematology, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, - SP, Brazil
| | | | - João Lúcio Azevedo
- Department of Genetics, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, - SP, Brazil
| | - Maria Carolina Quecine
- Department of Genetics, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, - SP, Brazil.
| |
Collapse
|
6
|
Santos JCD, Batista IH, Barroso HS, Lima JMS, Costa Neto PDQ, Ghelfi A, Pereira JO. Biodegradation of the fungicide carbendazim by bacteria from Coriandrum sativum L. rhizosphere. ACTA ACUST UNITED AC 2017. [DOI: 10.4025/actascibiolsci.v39i1.34067] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
7
|
Gubiani JR, Teles HL, Silva G, Young MCM, Pereira JO, Bolzani VDS, Araújo AR. Cyclo-(TRP-PHE) diketopiperazines from the endophytic fungus Aspergillus versicolor isolated from Piper aduncum. QUIM NOVA 2016. [DOI: 10.21577/0100-4042.20160165] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
8
|
Silva MCSE, Polonio JC, Quecine MC, Almeida TTD, Bogas AC, Pamphile JA, Pereira JO, Astolfi-Filho S, Azevedo JL. Endophytic cultivable bacterial community obtained from the Paullinia cupana seed in Amazonas and Bahia regions and its antagonistic effects against Colletotrichum gloeosporioides. Microb Pathog 2016; 98:16-22. [PMID: 27343372 DOI: 10.1016/j.micpath.2016.06.023] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 06/16/2016] [Accepted: 06/21/2016] [Indexed: 01/17/2023]
Abstract
Guarana (Paullinia cupana var. sorbilis) is a plant from the Amazonas region with socio-economic importance. However, guarana production has been increasingly affected by unfavorable conditions resulting from anthracnose, caused by the Colletotrichum fungal genus, which primarily affects mainly the Amazonas region. The aim of the present study was to isolate bacterial endophytes from the seeds of guarana plants obtained from Amazonas region and the Northeast state of Bahia, a region where this disease is not a problem for guarana plantations. The number of bacterial Colony Forming Units (CFU/g seeds) was 2.4 × 10(4) from the Bahia and 2.9 × 10(4) from the Amazonas region. One hundred and two isolated bacteria were evaluated in vitro against the phytopathogenic strain Colletotrichum gloeosporioides L1. These isolates were also analyzed for the enzymatic production of amylase, cellulase, protease, pectinase, lipase and esterase. Approximately 15% of isolates, showing high antagonistic activity, and the production of at least one enzyme were identified through the partial sequencing of 16S rDNA. The genus Bacillus was the most frequently observed, followed by Paenibacillus, Ochrobactrum, Microbacterium and Stenotrophomonas. Proteolytic activity was observed in 24 isolates followed by amylolytic, pectinolytic and cellulolytic activities. No esterase and lipase production was detected. Most of the isolates, showing antagonistic effects against C. gloeosporioides and high enzymatic activities, were isolated from the anthracnose-affected region. A biocontrol method using the endophytes from guarana seeds could be applied in the future, as these bacteria are vertically transferred to guarana seedlings.
Collapse
Affiliation(s)
- Maria Carolina Santos E Silva
- Departamento de Genética, ESALQ - Escola Superior de Agricultura "Luiz de Queiroz" - USP, CEP 13418-900, Piracicaba, SP, Brazil
| | - Julio Cesar Polonio
- Departamento de Biotecnologia, Genética e Biologia Celular, Laboratório de Biotecnologia Microbiana, Universidade Estadual de Maringá, CEP 87020-900, Maringá, Paraná, Brazil
| | - Maria Carolina Quecine
- Departamento de Genética, ESALQ - Escola Superior de Agricultura "Luiz de Queiroz" - USP, CEP 13418-900, Piracicaba, SP, Brazil
| | - Tiago Tognolli de Almeida
- Departamento de Genética, ESALQ - Escola Superior de Agricultura "Luiz de Queiroz" - USP, CEP 13418-900, Piracicaba, SP, Brazil
| | - Andréa Cristina Bogas
- Departamento de Genética, ESALQ - Escola Superior de Agricultura "Luiz de Queiroz" - USP, CEP 13418-900, Piracicaba, SP, Brazil
| | - João Alencar Pamphile
- Departamento de Biotecnologia, Genética e Biologia Celular, Laboratório de Biotecnologia Microbiana, Universidade Estadual de Maringá, CEP 87020-900, Maringá, Paraná, Brazil.
| | - José Odair Pereira
- Departamento de Ciências Fundamentais e Desenvolvimento Agrícola, Universidade Federal do Amazonas, Faculdade de Ciências Agrárias, CEP 69077-000, Manaus, AM, Brazil
| | - Spartaco Astolfi-Filho
- Departamento de Ciências Fundamentais e Desenvolvimento Agrícola, Universidade Federal do Amazonas, Faculdade de Ciências Agrárias, CEP 69077-000, Manaus, AM, Brazil
| | - João Lucio Azevedo
- Departamento de Genética, ESALQ - Escola Superior de Agricultura "Luiz de Queiroz" - USP, CEP 13418-900, Piracicaba, SP, Brazil
| |
Collapse
|
9
|
Pereira JV, Leomil L, Rodrigues-Albuquerque F, Pereira JO, Astolfi-Filho S. Bacterial diversity in the saliva of patients with different oral hygiene indexes. Braz Dent J 2013. [PMID: 23207858 DOI: 10.1590/s0103-64402012000400017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The objective of the present study was to evaluate the bacterial diversity in the saliva of patients with different oral hygiene indexes using of two 16S rRNA gene libraries. Each library was composed of samples from patients with different averages of the differentiated Silness-Löe biofilm index: the first library (A) with an index between 1.0 and 3.0 (considered a high index) and the second library (B) between 0 and 0.5 (considered a low index). Saliva DNA was extracted and the 16S rRNA gene was amplified and cloned. The obtained sequences were compared with those stored at NCBI and RDP GenBank. The saliva of patients with high index presented five known genera - Streptococcus, Granulicatella, Gemella, Veillonella and Peptostreptococcus - and 33.3% of nonculturable bacteria grouped into 23 operational taxonomic units (OTUs). The saliva of patients with low index differed significantly from the first library (p=0.000) and was composed of 42 OTUs distributed into 11 known genera - Streptococcus, Granulicatella, Gemella, Veillonella, Oribacterium, Haemophilus, Escherichia, Neisseria, Prevotella, Capnocytophaga, Actinomyces - including 24.87% of nonculturable bacteria. It was possible to conclude that there is greater bacterial diversity in the saliva of patients with low dental plaque in relation to patients with high dental plaque.
Collapse
|
10
|
Ramos ÓL, Pereira JO, Silva SI, Fernandes JC, Franco MI, Lopes-da-Silva JA, Pintado ME, Malcata FX. Evaluation of antimicrobial edible coatings from a whey protein isolate base to improve the shelf life of cheese. J Dairy Sci 2012; 95:6282-92. [PMID: 22939797 DOI: 10.3168/jds.2012-5478] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Accepted: 06/28/2012] [Indexed: 11/19/2022]
Abstract
The objective of this work was to evaluate the effectiveness of antimicrobial edible coatings to wrap cheeses, throughout 60 d of storage, as an alternative to commercial nonedible coatings. Coatings were prepared using whey protein isolate, glycerol, guar gum, sunflower oil, and Tween 20 as a base matrix, together with several combinations of antimicrobial compounds-natamycin and lactic acid, natamycin and chitooligosaccharides (COS), and natamycin, lactic acid, and COS. Application of coating on cheese decreased water loss (~10%, wt/wt), hardness, and color change; however, salt and fat contents were not significantly affected. Moreover, the antimicrobial edible coatings did not permit growth of pathogenic or contaminant microorganisms, while allowing regular growth of lactic acid bacteria throughout storage. Commercial nonedible coatings inhibited only yeasts and molds. The antimicrobial edible coating containing natamycin and lactic acid was the best in sensory terms. Because these antimicrobial coatings are manufactured from food-grade materials, they can be consumed as an integral part of cheese, which represents a competitive advantage over nonedible coatings.
Collapse
Affiliation(s)
- Ó L Ramos
- CBQF/Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Dr. António Bernardino de Almeida, P-4200-072 Porto, Portugal
| | | | | | | | | | | | | | | |
Collapse
|
11
|
Reis Júnior JDDD, Fernandes AB, Santos FSD, Silva JHG, Loiola RPD, Silva JG, Pereira JO. Soroprevalência da infecção por Helicobacter pylori em uma amostra rural do Estado do Amazonas, Brasil. ACTA ACUST UNITED AC 2012. [DOI: 10.5123/s2176-62232012000100005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
12
|
Pereira JO, Mac Conell EFA, Silva SQ, Chernicharo CAL. Granular biomass selection in a double-stage biogas collection UASB reactor: effects on SMA, abundance and diversity of the methanogenic population. Water Sci Technol 2012; 66:2570-2577. [PMID: 23109572 DOI: 10.2166/wst.2012.483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The present work aimed at investigating biomass selection in a pilot-scale double-stage biogas collection (DSBC) upflow anaerobic sludge bed (USAB) reactor treating domestic wastewater. Specific methanogenic activity (SMA) measurements and FISH countings were applied to sludge samples collected during 102 days of operation of the DSBC-UASB and of a control reactor. Results showed that both reactors presented similar SMA values in early stages of operation however the UASB-DSBC reactor showed much higher SMA after day 45, when the biomass was in granular stage. In terms of archaeal abundance, no statistical difference was observed between the reactors. Polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) revealed a similar composition of the archaeal communities in the two reactors and during the operational period, mainly constituted by Methanosaeta concilii. The results suggest that cell activity rather than archaeal abundance or diversity drive the methane production in the UASB reactors.
Collapse
Affiliation(s)
- J O Pereira
- Federal University of São João Del-Rei, Ouro Branco, Brazil.
| | | | | | | |
Collapse
|
13
|
Pereira JO, Celani JSS, Chernicharo CAL. Control of scum accumulation in a double stage biogas collection (DSBC) UASB reactor treating domestic wastewater. Water Sci Technol 2009; 59:1077-1083. [PMID: 19346621 DOI: 10.2166/wst.2009.093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This paper presents an innovative reactor concept which is based on a double-stage biogas collection (DSBC) device aimed at controlling scum formation and accumulation in UASB reactors treating municipal wastewater. Scum production inside a control reactor and a DSBC-UASB reactor was compared and much lower scum yield coefficients were observed for the DSBC-UASB reactor. However, the mass balance indicated that the dominant control mechanism was scum disaggregation and exit to settler zone rather than scum degradation.
Collapse
Affiliation(s)
- J O Pereira
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | | | | |
Collapse
|
14
|
França SC, Kashima S, Roberto PG, Marins M, Ticli FK, Pereira JO, Astolfi-Filho S, Stábeli RG, Magro AJ, Fontes MRM, Sampaio SV, Soares AM. Molecular approaches for structural characterization of Bothrops L-amino acid oxidases with antiprotozoal activity: cDNA cloning, comparative sequence analysis, and molecular modeling. Biochem Biophys Res Commun 2007; 355:302-6. [PMID: 17292326 DOI: 10.1016/j.bbrc.2006.12.217] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2006] [Accepted: 12/21/2006] [Indexed: 11/25/2022]
Abstract
Two l-amino acid oxidases (LAAOs) were identified by random sequencing of cDNA libraries from the venom glands of Bothrops moojeni(BmooLAAO) and Bothrops jararacussu(Bjussu LAAO). Phylogenetic analysis involving other SV-LAAOs showed sequence identities within the range 83-87% being closely related to those from Agkistrodon and Trimeresurus. Molecular modeling experiments indicated the FAD-binding, substrate-binding, and helical domains of Bmoo and Bjussu LAAOs. The RMS deviations obtained by the superposition of those domains and that from Calloselasma rhodostoma LAAO crystal structure confirm the high degree of structural similarity between these enzymes. Purified BjussuLAAO-I and BmooLAAO-I exhibited antiprotozoal activities which were demonstrated to be hydrogen-peroxide mediated. This is the first report on the isolation and identification of cDNAs encoding LAAOs from Bothrops venom. The findings here reported contribute to the overall structural elucidation of SV-LAAOs and will advance the understanding on their mode of action.
Collapse
Affiliation(s)
- Suzelei C França
- Unidade de Biotecnologia Vegetal, Universidade de Ribeirão Preto, UNAERP, Ribeirão Preto-SP, Brazil.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Pastre R, Marinho AMR, Rodrigues-Filho E, Souza AQL, Pereira JO. Diversidade de policetídeos produzidos por espécies de Penicillium isoladas de Melia azedarach e murraya paniculata. QUIM NOVA 2007. [DOI: 10.1590/s0100-40422007000800013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
16
|
Pereira JV, Bergamo DCB, Pereira JO, França SDC, Pietro RCLR, Silva-Sousa YTC. Antimicrobial activity of Arctium lappa constituents against microorganisms commonly found in endodontic infections. Braz Dent J 2005; 16:192-6. [PMID: 16429183 DOI: 10.1590/s0103-64402005000300004] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This study evaluated in vitro the antimicrobial activity of rough extracts from leaves of Arctium lappa and their phases. The following microorganisms, commonly found in the oral cavity, specifically in endodontic infections, were used: Enterococcus faecalis, Staphylococcus aureus, Pseudomonas aeruginosa, Bacillus subtilis and Candida albicans. The agar-diffusion method allowed detection of the hexanic phase as an inhibitor of microbial growth. Bioautographic assays identified antimicrobial substances in the extract. The results showed the existence, in the rough hexanic phase and in its fractions, of constituents that have retention factors (Rf) in three distinct zones, thereby suggesting the presence of active constituents with chemical structures of different polarities that exhibited specificity against the target microorganisms. It may be concluded that the Arctium lappa constituents exhibited a great microbial inhibition potential against the tested endodontic pathogens.
Collapse
|
17
|
Teles HL, Silva GH, Castro-Gamboa I, Bolzani VDS, Pereira JO, Costa-Neto CM, Haddad R, Eberlin MN, Young MCM, Araújo AR. Benzopyrans from Curvularia sp., an endophytic fungus associated with Ocotea corymbosa (Lauraceae). Phytochemistry 2005; 66:2363-7. [PMID: 16038954 DOI: 10.1016/j.phytochem.2005.04.043] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2005] [Revised: 04/20/2005] [Accepted: 04/20/2005] [Indexed: 05/03/2023]
Abstract
An isolate of Curvularia sp. was obtained from the leaves of Ocotea corymbosa, a native plant of the Brazilian Cerrado. The ethyl acetate extract from culture of this fungus afforded two benzopyran derivatives: (2'S)-2-(propan-2'-ol)-5-hydroxy-benzopyran-4-one (2) and 2,3-dihydro-2-methyl-benzopyran-4,5-diol (4); and two known benzopyrans: 2-methyl-5-methoxy-benzopyran-4-one (1) and (2R)-2,3-dihydro-2-methyl-5-methoxy-benzopyran-4-one (3). The structures of 2 and 4 were established on the basis of comprehensive spectroscopic analysis, mainly using 1D and 2D NMR experiments. The benzopyrans 1 and 2 showed weak in vitro antifungal activity against Cladosporium sphaerospermum and C. cladosporioides. Analyses of the biological activities were also carried out on HeLa (human cervix tumor) and CHO (Chinese hamster ovary) cells, aiming to evaluate their potential effects on mammalian cell line proliferation. Results from both cell lines indicated that compound 2 was able to induce cell proliferation: 70% on HeLa cells and 25% on CHO cells.
Collapse
Affiliation(s)
- Helder Lopes Teles
- NuBBE-Núcleo de Bioensaio, Biossíntese e Ecofisiologia de Produtos Naturais, Instituto de Química, Universidade Estadual Paulista, CP 355, CEP 14801-970, Araraquara, SP, Brazil
| | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Costa Pinto LSR, Azevedo JL, Pereira JO, Carneiro Vieira ML, Labate CA. Symptomless infection of banana and maize by endophytic fungi impairs photosynthetic efficiency. New Phytol 2000; 147:609-615. [PMID: 33862932 DOI: 10.1046/j.1469-8137.2000.00722.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Very little is known about the physiological interactions between plant hosts and symptomless endophytic fungi despite their widespread occurrence. We investigated the impact of two such fungi, Colletotrichum musae and Fusarium moniliforme, upon the photosynthetic capacity of two crop plants, banana and maize, respectively. Endophyte-free plants were obtained first and then infected with the fungi. Measurements of total chlorophyll content revealed very little difference between endophyte-free and infected plants of banana, whereas in maize they showed 50% reductions in the endophyte-infected plants. The maximum photochemical capacity (Fv /Fm ) was measured in order to determine if the plants had any photoinhibitory effect caused by biotic or abiotic factors. After 45 d of growth, endophyte-free banana plants had similar values of Fv /Fm to plants typical of nonstressed conditions, whereas the endophyte-infected plants showed a reduction of approx. 15%. Unlike banana, infected maize plants displayed values of Fv /Fm similar to those of control and endophyte-free plants, indicating that the maximum photochemical capacity was not affected by infection. The light response curves of both species showed that the photosynthethic capacity was severely reduced in endophyte-infected plants, reaching saturation at c. 400 μmol m-2 s-1 whereas the control and endophyte-free plants were saturated at much higher photon flux densities. In banana the effect seemed to be due to an impairment of electron transport in the thylakoid membranes. By contrast, reduction of the photosynthetic capacity in maize was due to a reduction in chlorophyll content, leading to a decrease in the electron transport components and a consequent reduction in carbohydrate synthesis. It is possible that the reduction in the maximum yield of photosynthesis in both crops was caused by toxins produced by the fungi. Nevertheless there were no major macroscopic effects on the plants to indicate disease symptoms.
Collapse
Affiliation(s)
- Luciana Santos Rodrigues Costa Pinto
- 1 Departamento de Genética, Escola Superior de Agricultura 'Luiz de Queiroz',Universidade de São Pálo, Av. Pádua Dias n° 11, CP 83, CEP 13400-970, Piracicaba-SP, Brazil
| | - João Lúcio Azevedo
- 1 Departamento de Genética, Escola Superior de Agricultura 'Luiz de Queiroz',Universidade de São Pálo, Av. Pádua Dias n° 11, CP 83, CEP 13400-970, Piracicaba-SP, Brazil
| | - José Odair Pereira
- 1 Departamento de Genética, Escola Superior de Agricultura 'Luiz de Queiroz',Universidade de São Pálo, Av. Pádua Dias n° 11, CP 83, CEP 13400-970, Piracicaba-SP, Brazil
| | - Maria Lúcia Carneiro Vieira
- 1 Departamento de Genética, Escola Superior de Agricultura 'Luiz de Queiroz',Universidade de São Pálo, Av. Pádua Dias n° 11, CP 83, CEP 13400-970, Piracicaba-SP, Brazil
| | - Carlos Alberto Labate
- 1 Departamento de Genética, Escola Superior de Agricultura 'Luiz de Queiroz',Universidade de São Pálo, Av. Pádua Dias n° 11, CP 83, CEP 13400-970, Piracicaba-SP, Brazil
| |
Collapse
|
19
|
Azevedo JL, Maccheroni Jr. W, Pereira JO, De Araújo WL. Endophytic microorganisms: a review on insect control and recent advances on tropical plants. ELECTRON J BIOTECHN 2000. [DOI: 10.2225/vol3-issue1-fulltext-4] [Citation(s) in RCA: 314] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
|
20
|
Schneider JF, Collet N, Orso PJ, Pereira JO. [Public health nursing, pedagogical and agricultural advice in a rural community of landless settled people: report of an experience]. Rev Lat Am Enfermagem 1995; 3:137-47. [PMID: 7728242 DOI: 10.1590/s0104-11691995000100011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
O estudo relata uma experiência no acompanhamento de Enfermagem, assessoramento pedagógico e agrícola desenvolvido em uma comunidade de assentados sem-terra na zona rural da cidade de Cascavel, estado do Paraná, que teve como premissa básica a integração docente/discente, oferecendo oportunidade de socialização do saber, integração teoria e prática e contato direto com a comunidade. Aponta para a necessidade da enfermagem compreender melhor este tipo de realidade buscando, através da observação e vivência, uma visão crítica com possibilidades de intervenção.
Collapse
|