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Genome of Herbaspirillum seropedicae Strain SmR1, a Specialized Diazotrophic Endophyte of Tropical Grasses
Fábio O. Pedrosa ,Rose Adele Monteiro,Roseli Wassem,Leonardo M. Cruz,Ricardo A. Ayub,Nelson B. Colauto,Maria Aparecida Fernandez,Maria Helena P. Fungaro,Edmundo C. Grisard,Mariangela Hungria,Humberto M. F. Madeira,Rubens O. Nodari,Clarice A. Osaku,Maria Luiza Petzl-Erler,Hernán Terenzi,Luiz G. E. Vieira,Maria Berenice R. Steffens,Vinicius A. Weiss,Luiz F. P. Pereira,Marina I. M. Almeida,Lysangela R. Alves,Anelis Marin,Luiza Maria Araujo,Eduardo Balsanelli,Valter A. Baura,Leda S. Chubatsu,Helisson Faoro,Augusto Favetti,Geraldo Friedermann,Chirlei Glienke,Susan Karp,Vanessa Kava-Cordeiro,Roberto T. Raittz,Humberto J. O. Ramos,Enilze Maria S. F. Ribeiro,Liu Un Rigo,Saul N. Rocha,Stefan Schwab,Anilda G. Silva,Eliel M. Souza,Michelle Z. Tadra-Sfeir,Rodrigo A. Torres,Audrei N. G. Dabul,Maria Albertina M. Soares,Luciano S. Gasques,Ciela C. T. Gimenes,Juliana S. Valle,Ricardo R. Ciferri,Luiz C. Correa,Norma K. Murace,Jo？o A. Pamphile,Eliana Valéria Patussi,Alberto J. Prioli,Sonia Maria A. Prioli,Carmem Lúcia M. S. C. Rocha,Olívia Márcia N. Arantes,Márcia Cristina Furlaneto,Leandro P. Godoy,Carlos E. C. Oliveira,Daniele Satori,Laurival A. Vilas-Boas,Maria Angélica E. Watanabe,Bibiana Paula Dambros,Miguel P. Guerra,Sandra Marisa Mathioni,Karine Louise Santos,Mario Steindel,Javier Vernal,Fernando G. Barcellos,Rubens J. Campo,Ligia Maria O. Chueire,Marisa Fabiana Nicolás,Lilian Pereira-Ferrari,José L. da Concei？？o Silva,Nereida M. R. Gioppo,Vladimir P. Margarido
PLOS Genetics , 2011, DOI: 10.1371/journal.pgen.1002064
Abstract: The molecular mechanisms of plant recognition, colonization, and nutrient exchange between diazotrophic endophytes and plants are scarcely known. Herbaspirillum seropedicae is an endophytic bacterium capable of colonizing intercellular spaces of grasses such as rice and sugar cane. The genome of H. seropedicae strain SmR1 was sequenced and annotated by The Paraná State Genome Programme—GENOPAR. The genome is composed of a circular chromosome of 5,513,887 bp and contains a total of 4,804 genes. The genome sequence revealed that H. seropedicae is a highly versatile microorganism with capacity to metabolize a wide range of carbon and nitrogen sources and with possession of four distinct terminal oxidases. The genome contains a multitude of protein secretion systems, including type I, type II, type III, type V, and type VI secretion systems, and type IV pili, suggesting a high potential to interact with host plants. H. seropedicae is able to synthesize indole acetic acid as reflected by the four IAA biosynthetic pathways present. A gene coding for ACC deaminase, which may be involved in modulating the associated plant ethylene-signaling pathway, is also present. Genes for hemagglutinins/hemolysins/adhesins were found and may play a role in plant cell surface adhesion. These features may endow H. seropedicae with the ability to establish an endophytic life-style in a large number of plant species.
Coupling dark-baryonic matter density profile for vacuum decay scenarios
H. T. C. M Souza,H. S. Gimenes,N. Pires
Physics , 2014,
Abstract: In this paper, we reanalysis the cosmological scenery with vacuum decay in dark matter proposed by Wand and Meng. Here, the baryonic matter is also considered as a fluid gravitationally coupled with dark matter. It is made a careful analysis to constrain this model with the observational data of growth rate of cosmic structures. The theoretical growth rate is followed since the primordial recombination and the main physical processes on the baryonic component are considered. As a complementary constraint, this model is compared with the observed CMB-BAO ratio as well with the gas mass fraction o cluster of galaxies. We found the best fit values for dark matter $\Omega_{d0} = 0.269 ^{+0.023}_{-0.023}$ and for the decay parameter $\epsilon = 0.02 ^{+0.04}_{-0.05}$.
Relationship between work rate and oxygen uptake in mitochondrial myopathy during ramp-incremental exercise
Gimenes, A.C.;Neder, J.A.;Dal Corso, S.;Nogueira, C.R.;Nápolis, L.;Mello, M.T.;Bulle, A.S.;Nery, L.E.;
Brazilian Journal of Medical and Biological Research , 2011,
Abstract: we determined the response characteristics and functional correlates of the dynamic relationship between the rate (δ) of oxygen consumption ( o2) and the applied power output (work rate = wr) during ramp-incremental exercise in patients with mitochondrial myopathy (mm). fourteen patients (7 males, age 35.4 ± 10.8 years) with biopsy-proven mm and 10 sedentary controls (6 males, age 29.0 ± 7.8 years) took a ramp-incremental cycle ergometer test for the determination of the o2 on-exercise mean response time (mrt) and the gas exchange threshold (get). the δo2/δwr slope was calculated up to get (s1), above get (s2) and over the entire linear portion of the response (st). knee muscle endurance was measured by isokinetic dynamometry. as expected, peak o2 and muscle performance were lower in patients than controls (p < 0.05). patients had significantly lower δo2/δwr than controls, especially the s2 component (6.8 ± 1.5 vs 10.3 ± 0.6 ml·min-1·w-1, respectively; p < 0.001). there were significant relationships between δo2/δwr (st) and muscle endurance, mrt-o2, get and peak o2 in mm patients (p < 0.05). in fact, all patients with δo2/δwr below 8 ml·min-1·w-1 had severely reduced peak o2 values (<60% predicted). moreover, patients with higher cardiopulmonary stresses during exercise (e.g., higher δ ventilation/carbon dioxide output and δ heart rate/δo2) had lower δo2/δwr (p < 0.05). in conclusion, a readily available, effort-independent index of aerobic dysfunction during dynamic exercise (δo2/δwr) is typically reduced in patients with mm, being related to increased functional impairment and higher cardiopulmonary stress.
Controle biológico de Colletotrichum acutatum, agente causal da queda prematura dos frutos cítricos
Kupper, Katia C.;Gimenes-Fernandes, Nelson;Goes, Antonio de;
Fitopatologia Brasileira , 2003, DOI: 10.1590/S0100-41582003000300005
Abstract: the present study evaluated the antagonistic potential of different isolates of bacillus subtilis to colletotrichum acutatum, causal agent of post-bloom fruit drop of citrus (citrus spp.) (pfd), under laboratory and field conditions. sixty four isolates of b. subtilis, four isolates of bacillus spp. and one isolate of b. thuringiensis were evaluated in relation to their ability to inhibit the development of the plant pathogen in paired cultures and their production of metabolites with antimicrobial activity. the most promising isolates were tested for the control of the disease under field conditions. all the bacillus spp. isolates induced strong inhibition on the growth of the plant pathogen. the isolates of bacillus spp. produced, in vitro, metabolites capable of inhibiting the mycelial growth of c. acutatum, and they maintained their activities in enough concentrations to cause the inhibition, even after submitted to 120 oc, for 20 min. the inhibition of c. acutatum by b. subtilis was due to antibiosis. among seven isolates of b. subtilis tested for the disease control, in natural conditions, the bca-69 differed from the control, and was statistically similar to benomyl, presenting lower percentage of symptomatic flowers and higher average number of effective fruits. an isolate of each of the species of trichoderma viride, t. pseudokoningii and t. aureovirde were also tested, in field conditions, for controlling pfd, and none differed from the control. the percentage of symptomatic flowers was more efficient than the average number of effective fruits (anef) in determining the effect of the applications of the biocontrol agents on disease control.
A turbulent bed contactor: energetic efficiency for particle collection
Gimenes, M. L.;Handley, D.;Silva, M. G. C.;
Brazilian Journal of Chemical Engineering , 2007, DOI: 10.1590/S0104-66322007000100004
Abstract: particle collection experiments were conducted in a fluidizing irrigated bed to evaluate the performance of mobile packings: 38 x 50 mm plain oblate spheroids 38 mm id plain spheres and alternative perforated spheres with a 38 mm id and 10% and 25% free areas were used as fluidizing media in a 0.264 m diameter and 1.20 m high turbulent bed contactor (tbc). particle collection experiments were carried out above the minimum fluidization velocity, using as particulate test powder polysized alumina (size 1.5 to 5.5 mm). experimental results demonstrated that the perforated spheres performed better in collecting particles than the other packings tested. the efficiency of particle collection was analysed based on energy consumption in the tbc, using the energetic efficiency concept. it was verified that not much more energy was consumed per unit of gas flow in fluidized beds of perforated packings than in those of conventional plain sphere packings, since the perforated spheres were more energetically efficient for particle collection than plain spheres and oblate spheroid packings.
O sucesso da campanha de erradica o do cancro cítrico no estado de S o Paulo, Brasil The success of erradication campaign os citrus canker in S o Paulo states, Brazil
José Belasque Jr.,Nelson Gimenes Fernandes,Cícero Augusto Massari
Summa Phytopathologica , 2009, DOI: 10.1590/s0100-54052009000200001
Abstract:
Controle biológico de Colletotrichum acutatum, agente causal da queda prematura dos frutos cítricos
Kupper Katia C.,Gimenes-Fernandes Nelson,Goes Antonio de
Fitopatologia Brasileira , 2003,
Abstract: O trabalho teve por finalidade estudar a potencialidade antagonística de isolados de Bacillus subtilis a Colletotrichum acutatum, agente causal da queda prematura dos frutos cítricos (Citrus spp.) (QPFC), sob condi es de laboratório e de campo. Foram estudados 64 isolados de B. subtilis, quatro isolados de Bacillus spp. e um isolado de B. thuringiensis quanto à capacidade de inibir o desenvolvimento do patógeno em cultura pareada e quanto à produ o de metabólitos com atividade antimicrobiana. Os isolados mais promissores foram testados em condi es de campo para controle da doen a. In vitro, todos os isolados de Bacillus spp. inibiram o crescimento de C. acutatum, n o havendo diferen as significativas entre eles. Os isolados de Bacillus spp. produziram, in vitro, metabólitos capazes de inibir o crescimento micelial de C. acutatum, os quais mantiveram suas atividades capazes de causar a inibi o, após autoclavagem a 120 oC, durante 20 min. Dentre os sete isolados de B. subtilis testados para o controle da QPFC, em condi es naturais, o ACB-69 diferiu da testemunha e de vários outros isolados, porém equiparou-se estatisticamente ao benomyl, proporcionando menor porcentagem de flores com sintomas e maior número médio de frutos efetivos. Ainda, sob condi es de campo, isolados de cada uma das espécies Trichoderma viride, T. pseudokoningii e T. aureoviride foram ineficientes, apresentando o mesmo comportamento da testemunha. Em rela o aos métodos de avalia o da doen a, a porcentagem de flores com sintomas foi mais eficiente do que o número médio de frutos efetivos (NMFE), uma vez que esses resultam do efeito direto do patógeno.
The performance of a three-phase fluidized bed reactor in treatment of wastewater with high organic load
Souza R. R.,Bresolin I. T. L.,Bioni T. L.,Gimenes M. L.
Brazilian Journal of Chemical Engineering , 2004,
Abstract: An experimental study was carried out aiming to evaluate the performance of a three-phase fluidized bed bioreactor (FBBR) used to treat milk wastewater. In this study three different concentrations of milk wastewater substrate (462, 825 and 1473 mg O2/L) were tested. Using the same number of support particles, the results demonstrate that the average efficiency of COD removal decreased as the concentration of organic load in the substrate was increased. The growth of microorganism in the FBBR was followed by a count of viable cells in both liquid phase and the biofilms attached to the support. An increased number of viable cells were observed inside the reactor when it was used to degrade higher organic loads, with most of the cells on the support. The higher concentration of active biomass was responsible for achieving a relatively high absolute degradation of the wastewater containing the high organic load.
Interaction between visiting bees (Hymenoptera, Apoidea) and flowers of Ludwigia elegans (Camb.) hara (Onagraceae) during the year in two different areas in S？o Paulo, Brazil
Gimenes, M.;
Brazilian Journal of Biology , 2003, DOI: 10.1590/S1519-69842003000400008
Abstract: this study was designed to characterize the interactions between ludwigia elegans flowers and visiting bees during two years in two areas 200 km apart, at the same latitude (approximately 22o48's) but at different altitudes (alumínio, 600 m, and campos do jord？o, 1500 m), in the state of s？o paulo, brazil. as these flowers open simultaneously in the morning and lose their petals by sunset, interaction with bees occurs only during the photophase. flowers of l. elegans were mainly visited by bees, the most frequent species being: tetraglossula anthracina (michener, 1989) (colletidae), rhophitulus sp. (andrenidae), and pseudagapostemon spp. (halictidae), all considered specialized bees for collecting pollen and nectar from these flowers, as well as the generalist bee apis mellifera linnaeus, 1758 (apidae). the specialist bees were temporally adjusted to the opening schedule of the flower, which occurs primarily in the morning, but shows a circannual variation. t. anthracina appears in both study areas, but only between december and april. the annual activity patterns of these specialist bees are synchronized to the phenology of l. elegans. photoperiod and temperature cycles are suggested as the main synchronizers of both bees and plants.
Poliniza？？o de Vochysia lucida C. Presl (Vochysiaceae) em uma área de restinga na Bahia
Gimenes, Miriam;
Revista Brasileira de Entomologia , 2007, DOI: 10.1590/S0085-56262007000400010
Abstract: vochysia species are neotropical and present flowers that can be visited by bees, hummingbirds, and butterflies. this study aimed to analyze the interactions between the flowers of vochysia lucida and their floral visitors in an area of restinga in bahia state, brazil. v. lucida is an arborescent species and presents inflorescences of the type raceme, with about 100 to 170 flowers. the flowers are zygomorphic, yellow-coloured, and considered mellitophilous. the floral nectar is produced and stored in the spur, which is localized at the calyx. the flowering peak of v. lucida was in november and december. all through the study the flowers opened at 6 h., when the stigma was already receptive. at flower opening the anther was already not more present and the pollen grains were deposited in the wall of the style, occurring secondary presentation of pollen. petals dropped in the end of the afternoon about 17:00 h. the hummingbirds, although frequent in the flowers of v. lucida, were considered as opportunistic visitors. among the recorded floral visitors, the large bees were regarded the most efficient pollinators, especially xylocopa frontalis, because it has suitable morphology and behavior to contact the reproductive structures of the flower, during nectar collections, and for its high visiting frequency.
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