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Search Results: 1 - 10 of 23645 matches for " Rosa Lia Barbieri "
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Variabilidade em matrizes de acessos de espinheira-santa
Mariot, Márcio Paim;Barbieri, Rosa Lia;Sinigaglia, Cledimara;Ribeiro, Márcia Vaz;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000200009
Abstract: maytenus ilicifolia and m. aquifolium are native brazilian species popularly known as espinheira-santa, being indicated for gastritis and stomach ulcer. embrapa clima temperado and universidade federal de pelotas (ufpel) keep a gene bank of these species. with the objective of identifing phenotypic variability for some morphological characters in matrices of espinheira-santa, estimating dissimilarity and clustering accessions through multivariate analysis, 105 accessions had been morphologically characterized. the characteristics evaluated were fruit length, fruit width, number of seeds per fruit, leaf length, leaf width, leaf length/leaf width ratio and number of thorns per leaf. the euclidean distance was estimated and accessions were clustered by tocher optimization method. a wide variability for all the characteristics analyzed was observed. the number of thorns per leaf was the characteristics that more contributed to the divergence. the morphological characteristics enabled to separate the accesses in seven clusters. the higher dissimilarity was between accessions 57 (m. ilicifolia) and 91 (m. aquifolium). there was no evidence of a separation in accordance to the geographic localization of the accessions. in the clustering analysis were identified two clusters that had accessions of both species, m. ilicifolia and m. aquifolium, indicating phylogenetic relatedness between these species.
Resistência das plantas a moléstias fúngicas
Matiello, Rodrigo Rodrigues;Barbieri, Rosa Lia;Carvalho, Fernando Irajá Félix de;
Ciência Rural , 1997, DOI: 10.1590/S0103-84781997000100028
Abstract: plant resistance to fungic diseases is due to their genetic constitution and environmental factors. in breeding programs, one of the main objectives is to obtain high grainyield potenlial plants with resistance to the prevalent diseases. knowledge of genetic basis of resistance is importam to increase selection efficiency and due to the wide variability of fungi there is the necessity of using different strategies to reduce the probability of pathogen estabtishment in crops.
Importancia, problemas e perspectivas do melhoramento visando resistência a viroses em plantas
Barbieri, Rosa Lia;Carvalho, Fernando Irajá Félix de;Federizzi, Luiz Carlos;
Ciência Rural , 1995, DOI: 10.1590/S0103-84781995000300028
Abstract: virus diseases are a serious problem to agricuiture, can be a limitant factor to normal development of some crops. control measures, like vectors elimination, healthy material use, culture rotation and infected plants eradication, are only transient solutions. the more efficient approach for control involves plant breeding resistant to virus or its vector. reduced availability of resistance source can be increased through recombinant dna technology, which brings new breeding perspectives to virus resistant crops.
Avalia??o de popula??es de Butia capitata de Santa Vitória do Palmar
Schwartz, Elisane;Fachinello, José Carlos;Barbieri, Rosa Lia;Silva, Jo?o Baptista da;
Revista Brasileira de Fruticultura , 2010, DOI: 10.1590/S0100-29452010005000089
Abstract: the genus butia belongs to the arecaceae family and shows five species occurring in rio grande de sul. the specie butia capitata requires special attention, not just for its use as fresh consumption but also as processed product. however, even having its use recorded since the pre-historic period this specie has been explored only in an extrativist way as most species of native fruits. moreover, the specie is seriously committed in the short term by the absence of natural regeneration and a very high risk of extinction in the future. therefore, the objective of this work was to compare the fruits, from chemical and physical parameters, and as well as to observe the productive data of the trees of three different populations of pindo palm tree in santa vitória do palmar. the data were obtained in experiments carried out in the 2005/2006 and 2006/2007 seasons at three lands located in santa vitória do palmar. the results allowed to verify that the populations of butia capitata assessed in santa vitória do palmar show variability for length of cycle, fruit epidermis color, juice volume, relationship between total soluble solids and total titratable acidity, biometric characteristics of fruit and yield. the population denominated celina showed the higher yield and industrial income. celina and s?o josé showed the best biometric characteristics of fruit. the population aguiar had the better relationship between total soluble solids and total titratable acidity.
Presen a do arilo na produ o de mudas de Maytenus ilicifolia
Mariot Márcio Paim,Barbieri Rosa Lia,Sinigaglia Cledimara,Bento Lúcia Helena
Ciência Rural , 2005,
Abstract: A propaga o da espinheira-santa (Maytenus ilicifolia) é feita por sementes, sendo indicada a retirada do arilo para a semeadura, prática que demanda muito tempo e m o-de-obra. O experimento foi instalado com o objetivo de avaliar a influência do arilo na produ o de mudas de espinheira-santa. Foram utilizados dois acessos do Banco Ativo de Germoplasma de M. ilicifolia da Embrapa Clima Temperado, 30 e 91. Os tratamentos utilizados foram: T1 - sementes com arilo retirado logo após a abertura das cápsulas (armazenadas em camara fria sem arilo); T2 - sementes com arilo retirado no dia da semeadura (armazenadas em camara fria com arilo) e T3 - sementes sem a retirada do arilo. Foram avaliados: dias da semeadura à emergência (DSE); porcentagem de emergência em canteiros (%EC); comprimento da parte aérea (CPA); diametro da base do caule (DBC) e número de folhas/planta (NF). A presen a do arilo nas sementes de M. ilicifolia n o influenciou os caracteres DSE, %G, DBC e NF, podendo influenciar apenas no caráter comprimento da parte aérea, dependendo da constitui o genética da popula o, n o sendo necessária a retirada do arilo para a semeadura.
Palm Forest Landscape in Castillos (Rocha, Uruguay): Contributions to the Design of a Conservation Area  [PDF]
Mercedes Rivas, José María Filippini, Henrique Cunha, Juan Hernández, Yuri Resnichenko, Rosa Lia Barbieri
Open Journal of Forestry (OJF) , 2017, DOI: 10.4236/ojf.2017.72007
Abstract: Butia palm forests are considered unique due to their aesthetic value, high biodiversity level and historical, archaeological and cultural value. The lack of regeneration of butia palms caused by cattle overgrazing and natural grasslands replacement by agriculture endangers these palm forests. The aim of this work is to provide information for the proposal of a conservation area in this rural landscape within the framework of sustainable development. This work was developed within the context of a Geographic Information System with thematic information on palm forest density levels, soils, land use aptitude and rural registers. Field surveys were conducted to record the presence of plant species and genetic resources in different vegetation units. The main category of soil cover was natural grasslands, followed by native forests, wetlands and palm forests. Palm forests grow mainly on soil units with poor to rather poor drainage and on arable or non-arable lands under special conditions. We identified 212 farms where the palm forest is found, a high diversity of vegetation units, the presence of 302 native taxa of plants and a significant number of plant genetic resources for various uses. For the designation of a conservation area, we propose 20 priority farms that will ensure that palm forests are well represented regarding ecosystem diversity. We consider the creation of a Protected Landscape, a State Park or a GIAHS to be the best alternatives so as to protect this unique multifunctional landscape.
Das Américas para o Mundo: origem, domestica??o e dispers?o do abacaxizeiro
Crestani, Maraisa;Barbieri, Rosa Lia;Hawerroth, Fernando José;Carvalho, Fernando Irajá Félix de;Oliveira, Antonio Costa de;
Ciência Rural , 2010, DOI: 10.1590/S0103-84782010000600040
Abstract: the pineapple(ananas comosus (l.) merril), fruit-symbol of tropical and subtropical regions, originated in the americas, was widespread throughout the world mainly by european navigators because of its aroma and flavor, and lush appearance. named as "king of colonial fruits", pineapple is one of the eleven most produced fruit in the world, growing consumed in every continent, with brazil as the largest producer. then, the objective of this literature review is to approach the pineapple history, contemplating its botany, origin and dispersion in the world and its current scenario and issues related to germplasm conservation and breeding.
Presen?a do arilo na produ??o de mudas de Maytenus ilicifolia
Mariot, Márcio Paim;Barbieri, Rosa Lia;Sinigaglia, Cledimara;Bento, Lúcia Helena;Ribeiro, Márcia Vaz;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000200038
Abstract: maytenus ilicifolia is propagated by seeds and it is indicated to remove arils before sowing, what requires much time and work. an experiment to evaluate the influence of arils over seedlings production was installed in embrapa clima temperado, in pelotas, rs. two accesses (30 and 91) of m. ilicifolia gene bank were used. the treatments were: t1 - seeds with arils removed immediately after the capsules (fruits) being opened (stored in cold room without arils); t2 - seeds with arils removed in the sowing?s day (stored in cold room with arils); t3 - seeds with arils. the characters evaluated were: days of sowing to emergence (dse); emergence percentage (%g); aerial part length (cpa); stem base diameter (dbc) and number of leaves/seedling (nf). the arils in the seeds of m. ilicifolia did not influence the characters dse, %g, dbc e nf, but can influence the aerial part length (cpa), depending on the population genetic constitution. it is not necessary to remove the seeds arils to sowing of m. ilicifolia.
Utiliza??o do inseticida Methomyl na sele??o de genótipos de aveia resistentes à helmintosporiose
Handel, Cristine Luise;Milach, Sandra Cristina Kothe;Federizzi, Luiz Carlos;Barbieri, Rosa Lia;Bered, Fernanda;Dornelles, Ana Lúcia Cunha;
Ciência Rural , 1999, DOI: 10.1590/S0103-84781999000200003
Abstract: spot blotch is a plant disease which causes yield losses in oat and other cereals. selection for resistant genotypes using helminthosporium sativum toxic filtrates is an efficient technique, which reduces the pathogen variability and the influence of the environment over the genotype expression. the filtrates extraction is time consuming and a difficult process, and the possibility of using a synthetic product to simulate its action of inhibiting the cell electron transport chain would be useful. the methomyl insecticide is an efficient product to simulate the effects of the fungus that causes spot blotch in corn. the objective of this study was to check its efficiency in oat. oat roots and callus growth were evaluated in the insecticide presence. growth values that were less inhibited by the insecticide were used to correlate with spot blotch resistance. the results indicate that methomyl reduces the growth of oat root and calli and may be used to differentiate genotypes more and less resistant to spot blotch. therefore, ufrgs 14, which was the most affected genotype in the presence of the fungus toxic filtrates, had also the most reduced root and calli growth in the presence of methomyl.
Avalia??o do óleo essencial de Aloysia sellowii (Briquet) moldenke (Verbenaceae) do Sul do Brasil
Rossato, Marcelo;Santos, Ana Cristina Atti dos;Serafini, Luciana Atti;Agostini, Fabiana;Pansera, Marcia Regina;Wasum, Ronaldo;Barbieri, Rosa Lia;
Química Nova , 2006, DOI: 10.1590/S0100-40422006000200004
Abstract: this work was performed with the aim of evaluating the chemical variability among samples of aloysia sellowii (verbenaceae) collected in different geographical regions as well as the application of supercritical co2 for obtaining essential oil. thus, samples were collected in different localities and oils were isolated by hydrodistillation and supercritical co2. results showed existence of two chimiotypes in the species (cineole and sabinene). the supercritical co2 extraction process was appropriate for extraction of a. sellowii essential oil at 40 oc, 110 bar, 2 ml/min of flow and 10 min of extraction time.
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