de Gutierrez I.E.M.,State University of Feira de Santana |
Nepomuceno C.F.,Programa de Pos graduacao em Botanica |
da Silva Ledo C.A.,Embrapa Mandioca e Fruticultura Tropical |
de Santana J.R.F.,UEFS
Ciencia Rural | Year: 2011
Bauhinia cheilantha, known as "pata-de-vaca", is of great economic and ethnopharmacological importance in the semiarid Brazilian. Seeds are dormant which makes it difficult to obtain uniform plants in a short time before this, our study aimed to establish a micropropagation protocol for the species. Cotyledonary and nodal segments of seedlings grown in vitro were inoculated on Woody Plant Medium (WPM) supplemented with various concentrations of 6- benzylaminopurine (BAP), thidiazuron (TDZ) or kinetin (KN) to induce adventitious shoot regeneration. In the rooting phase, different concentrations of indole-3-butyric acid (IBA) and the activated charcoal were tested. The nodal segments showed organogenic capacity greater than the cotyledonary segment. The highest number of shoots (4.3 and 2.1) was obtained at 1.0mg L-1 TDZ and 1.5mg L-1 BAP, respectively. However, in the presence of TDZ was observed the smaller shoots.The use of 2.0mg L-1 IBA within activated charcoal (AC) promoted the highest percentage of rooting (about 60.0%) and number of adventitious roots (2.5). The rooted shoots were transferred to greenhouse and successfully acclimatized.
Lima-Brito A.,State University of Feira de Santana |
Albuquerque M.M.S.,UEFS |
Alvim B.F.M.,UEFS |
Resende S.V.,Federal University of Bahia |
And 2 more authors.
Ciencia Rural | Year: 2011
The in vitro conservation is an ex situ conservation strategy that ensures the maintenance of genetic and biological integrity of species. The present study evaluated the effects of, osmotic agents and different temperature regimes on the in vitro conservation of Syngonanthus mucugensis Giul. subsp. mucugensis. The shoots were inoculated into half salt strength Murashige and Skoog culture medium (MS 1/2) containing 7g L -1 of agar. The culture medium was supplemented with 60gL -1 sucrose and with the sucrose concentrations 15, 30 and 45g L -1 combined with 0 and 15g L -1 of sorbytol or mannitol. Two different temperatures were used in these experiments (18 and 25°). The percentage of plant survival was evaluated monthly and at 180 days were analyzed length of shoot and root, the percentage of green leaves, the percentage of explants with shoots and number of shoots per explants and shoot length. The addition of osmotic agents resulted in decreased growth of the plants and therefore reduced their viability. The averages observed in the experiments undertaken at 18°C were significantly superior to those observed at 25°C for all of the variables analyzed. S. mucugensis subsp. mucugensis can be cultured at 18°C in MS1/2 culture medium containing 15g L -1 of sucrose, for up to 180 days, without subculturing.
da Costa G.M.,State University of Feira de Santana |
Nepomuceno C.F.,Programa de Pos graduacao em Botanica |
de Santana J.R.F.,UEFS
Ciencia Rural | Year: 2010
Erythrina velutina (mulungu) is a native plant of the semi-arid region that can be propagated via tissue culture, which may contribute to the rapid multiplication of this species, reducing the possibility environmental impacts. The objective of this study was to establish a protocol for micropropagation of mulungu using aseptic explants seedlings grown in vitro. For the induction of shoots, nodal segments and cotyledons were used as explants hypocontyl and were inoculated in a WPM culture medium supplemented with different concentrations of BAP and NAA. The rooting of shoots was achieved in a WPM medium supplemented with 0.0; 2.46; 4.92; 9.88μM IBA. The best answer to the multiplication was obtained in medium supplemented with 17.76μM BAP using nodal segment or cotyledonary node explants. The shoots rooted in all conditions tested, including the culture medium without auxin.
Nolasco E.C.,State University of Feira de Santana |
Coelho A.G.,UEFS |
Bioscience Journal | Year: 2013
The study goals were to investigate the flowering phenology, the floral biology, and the floral visitors of Calatheacrocata. The data was collected in an understory fragment of Atlantic Forest at Igrapiúna city, state of Bahia. Field expeditions were conducted by month from July 2009 to August 2011. Every month flowering phenology data was documented. Besides floral morphometry, volume and concentration of nectar data, the floral attributes of C. crocata were collected. Hummingbird species that visited the plant was registered by focal observations in breeding plants from sunrise to sunrise, establishing the frequency and forage behavior. Natural pollination and self-pollination tests were conducted, in addition to trigger efficiency. The breeding season is annual, and has intermediate duration, being negatively correlated with the temperature. Calatheacrocata is an ornithophilous species; its flowers are tubular, with yellow corollas of 24,3mm of length average, and 2,6mm of aperture average. The nectar has a sugar's concentration average of 21%, and a volume's average production of 9,4 μl. The flowers were visited legitimately by four hummingbird species. The visits frequency was 0,69 visits per inflorescence/hour, all of them were able to release the trigger. Phaethornisruber was the mainly pollen vector of C. crocata. Calatheacrocata is an allogamous species, and is not capable of spontaneous selfpollination: just the natural pollination test produced fruits. More specific features, as the trigger reduction, visible in this species, can be an evolutionary evidence from melitophily to ornithophily already seen in Marantaceae family, but not too noted on the genre.
Campos V.C.A.,State University of Feira de Santana |
Lima-Brito A.,Programa de Pos graduacao em Botanica |
de Gutierrez I.E.M.,Programa de Pos graduacao em Biotecnologia |
de Santana J.R.F.,UEFS
Ciencia Rural | Year: 2013
Umburana de cheiro is a species native to the Caatinga, widely used by local people, beca-use the value oftimber, ornamental, forage and especially medicinal. Considering the significant risk of extinction and the ausence of studies related to the cultive and propagation, the aim of this work was to establish a protocol for micropropagation Amburana cearensis. For this, we evaluated the influence of plant growth regulator BAP at five different concentrations (0.0, 2.22, 4.44, 8.88 and 17.76mM) on the in vitro multiplication of different explants (nodal segments, apex cotyledon and stem segment) and the rooting stage we tested different concentrations of IBA (0.0, 2.5, 5.0 and 10.0mM) in the presence and absence of 1.0g L1 of activated charcoal. Highest number of shoots (2.36) was obtained in 4.44mM of BAP from cotyledonary segment and higher rooting percentage (92.0%) ocurred in 10.0mM of IBA in the absence of activated charcoal. There were no difficulties to the establishment of micropropagation protocol A. cearensis.
Freitas-Lemes P.,University of Paraíba Valley |
Rodrigues I.,University of Paraíba Valley |
Faundez-Abans M.,Mcti Laboratorio Nacional Of Astrofisica |
Dors Jr. O.L.,University of Paraíba Valley |
Monthly Notices of the Royal Astronomical Society | Year: 2012
Interactions between galaxies are very common. There are special types of interactions that produce systems called polar ring galaxies (PRGs), composed of a lenticular, elliptical or spiral host galaxy, surrounded by a ring of stars and gas, orbiting in an approximately polar plane. In this paper, we study AM 2020-504, a PRG with an elliptical host galaxy, and a narrow and well-defined ring, probably formed by accretion of material from a donor galaxy, collected by the host galaxy. Our observational study is based on BVRI broad-band imagery as well as long-slit spectroscopy in the wavelength range 4100-8600 Å, performed at the 1.6-m telescope at the Observatório do Pico dos Dias, Brazil. We have estimated a redshift of z = 0.01683, corresponding to a heliocentric radial velocity of 5045 ± 23 km s-1. The (B-R) colour map shows that the ring is bluer than the host galaxy, which indicates that the ring is a younger structure. Standard diagnostic diagrams have been used to classify the main ionizing source of selected emission-line regions (nucleus, host galaxy and ring).We find that the ring regions are mainly ionized by massive stars, while the nucleus presents the characteristics of an active galactic nucleus. Using two empirical methods, we have found oxygen abundances for the HII regions located in the ring in the range 12+log(O/H) = 8.3-8.8 dex. We have also found the presence of an oxygen gradient across the ring, and it appears that AM 2020-504 follows the metallicity-luminosity relation of spiral galaxies. These results support the accretion scenario for this object and they rule out cold accretion as the source for the HI gas in the polar ring. © 2012 The Authors.
Palmeira S.M.V.,Federal University of Bahia |
Gois L.M.,Federal University of Bahia |
Latin American Applied Research | Year: 2012
Scientific studies have shown that mango peel is a rich source of phenolic compounds, which present antioxidant activity. In order to contribute to the future applications of this material, this paper aims the optimization of the extraction process of phenolic compounds from mango peels. The following process parameters were evaluated in this study: mango variety, peel drying time, ethanol concentration and solvent temperature. A two-level, four-factor full- factorial design (24) was used in the design of the experiments and in the analysis of the results. With the preliminary results a star experimental design around the central point was performed to obtain a response surface. A maximum extraction yield of 33.7% of total phenolics was obtained for the "Espada" variety, with ethanol concentration of 70% and 10 hours of mango peel drying time.
Rosa Jr. A.C.P.,Programa de Modelagem Computacional |
De Jesus J.C.O.,UEFS |
Moret M.A.,Programa de Modelagem Computacional
Physica A: Statistical Mechanics and its Applications | Year: 2013
We study the X-ray intensities of 142 light curves of cataclysmic variables, galaxies, pulsars, supernova remnants and other X-ray sources present in the public data collected by the instrument All Sky Monitor on board the satellite Rossi X-ray Timing Explorer. We show that the X-ray light curves coming from astrophysical systems obey Tsallis's q-Gaussian distribution as probability density. This fact strongly suggests that these astrophysical systems behave in a non-extensive manner. Furthermore, the q entropic indices for these systems were obtained and they provide an indication of the nonextensivity degree of each of these astrophysical systems. The q-value increases for systems if the Tsallis entropy decreases. © 2013 Elsevier B.V. All rights reserved.
Reis R.C.R.,UEFS |
Reis R.C.R.,Laboratorio Of Analise Of Sementes Lasesa |
Dantas B.F.,Laboratorio Of Analise Of Sementes Lasesa |
Revista Brasileira de Sementes | Year: 2012
Some environmental factors, including water availability, may influence seed germination. This study investigated the germination of E. velutina seeds submitted to different osmotic potentials and mobilization of reserves during water-stress. Scarified seeds were arranged in paper rolls and soaked in solutions of Polyethylene Glycol (PEG) prepared in osmotic potentials 0.0, -0.2, -0.4, -0.6, and -0.8 MPa and kept into a seed germinator, at 25 °C, and 12/12 h photoperiod (L/D), during 10 days. The percentage, mean time, mean speed, germination speed index; as well as the germination uniformity coefficient were assessed. During germination process the total soluble sugars, reducing sugars, soluble protein, and total amino acids were quantified in the cotyledon, hypocotyl and radicle of soaked seeds and cotyledons of quiescent seeds (control). There was influence of osmotic potential on E. velutina seed germination. The germination percentage remained at high levels until -0.6 MPa and above this osmotic potential there has been no germination. The mobilization of stored reserves of carbon and nitrogen in E. velutina seeds was also influenced by water-stress. There was sensitiveness between -0.2 and -0.6 MPa; however, the degradation and the mobilization of reserves was slower when the osmotic potential decreased.
PubMed | Federal University of Bahia and UEFS
Type: Journal Article | Journal: International archives of otorhinolaryngology | Year: 2015
IntroductionThe aging population phenomenon is occurring on a global scale; aging affects all of the structures of organisms, including the oral cavity. ObjectiveTo estimate the frequency of oral lesions, according to the clinical and histopathologic diagnoses, and to describe the sociodemographic profile of the elderly treated at the referral centers of oral lesions of public universities in Bahia, Brazil. MethodsA descriptive epidemiologic study with transverse characteristics was conducted with elderly patients between August 2010 and January 2012. A form was used to collect data. The descriptive analysis consisted of calculating the simple and relative frequencies of sociodemographic variables and oral lesions. ResultsThe population was predominantly black women, and the minority of elderly people were retired. Fibroid (13%) and squamous cell carcinoma (145%) were more prevalent clinical diagnoses, with squamous cell carcinoma (30.7%) and fibrous hyperplasia more prevalent histopathologic diagnoses. ConclusionA prevention policy needs to be implemented to reduce new cases of oral lesions in Bahia, Brazil and to aid in early diagnosis and appropriate treatment of oral lesions.