Saintpaulia Ionantha
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Influência de extratos vegetais no desenvolvimento in vitro de plântulas de Rosa x hybrida
Estudou-se a influência de extratos vegetais no crescimento, in vitro, de plântulas de Rosa x hybrida, objetivando o desenvolvimento de novos reguladores vegetais para a propagação dessa planta ornamental. Extratos metanólicos de Saintpaulia ionantha Wendl. (folhas), Hibiscus rosa-sinensis L. (folhas) e Bougainvillea spectabilis Wild. (folhas e flores)
Ciência e Agrotecnologia. Publicado em: 2007-12
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2. Micropropagação de violeta-africana (Saintpaulia ionantha Wendl.): efeito da Benzilaminopurina na multiplicação
A violeta-africana (Saintpaulia ionantha Wendl.) é uma espécie cultivada como ornamental pela beleza de suas flores e folhagem. A Benzilaminopurina (BAP) pode ser utilizada na multiplicação in vitro dessa espécie, no entanto, inexistem informações mais detalhadas sobre as respostas obtidas sobre a multiplicação, em uma faixa ampla de concentrações
Ciência e Agrotecnologia. Publicado em: 2007-10
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3. Enraizamento de estacas foliares de violeta-africana (Saintpaulia ionantha Wendl.) em diferentes substratos
O presente trabalho foi conduzido com objetivo de avaliar diferentes substratos no enraizamento de estacas foliares de violeta-africana (Saintpaulia ionantha Wendl). O trabalho foi desenvolvido em casa-de-vegetação, com tela de poliolefina 70%, no Centro de Ciências Agrárias da Universidade Federal do Espírito Santo, Alegre-ES. Utilizaram-se plantas adu
Ciência e Agrotecnologia. Publicado em: 2005-04
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4. Função de resposta à temperatura para modelar o crescimento e desenvolvimento folhar da violeta africana (Saintpaulia ionantha Wendl.)
Funções de resposta usadas em modelos de simulação de culturas freqüentemente são diferentes para diferentes processos fisiológicos e cultivares, fazendo com que muitos coeficientes das funções de respostas sejam desconhecidos. Este é o caso da violeta africana (Saintpaulia ionantha Wendl.), em que uma função geral de resposta à temperatura para
Ciência Rural. Publicado em: 2004-02
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5. Role of endoglucanases in Erwinia chrysanthemi 3937 virulence on Saintpaulia ionantha.
The role of endoglucanases (endoglucanases Z and Y) in Erwinia chrysanthemi pathogenicity on Saintpaulia ionantha was assessed by mutagenizing cloned cel genes (celZ and celY) and recombining them with the chromosomal alleles. Strains with an omega interposon in celZ, a deletion in celY, or a double cel mutant were as virulent as the wild-type strain. Howeve
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6. Iron Deficiency Induced by Chrysobactin in Saintpaulia Leaves Inoculated with Erwinia chrysanthemi.
In this communication, we examine the fate of iron during soft rot pathogenesis caused by Erwinia chrysanthemi on its host, Saintpaulia ionantha. The spread of soft rot caused by this enterobacterium was previously shown to depend on a functional genetic locus encoding a high-affinity iron assimilation system involving the catechol-type siderophore chrysobac
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7. Cold-Induced Sudden Reversible Lowering of in Vivo Chlorophyll Fluorescence after Saturating Light Pulses 1: A Sensitive Marker for Chilling Susceptibility
In chilling-sensitive plants (Glycine max, Saintpaulia ionantha, Saccharum officinarum) a sudden reversible drop in chlorophyll fluorescence occurs during photosynthetic induction immediately following saturating light pulses at low temperatures in the range 4 to 8°C. A comparison of two soybean cultivars of different chilling sensitivities revealed that th
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8. The minimal gene set member msrA, encoding peptide methionine sulfoxide reductase, is a virulence determinant of the plant pathogen Erwinia chrysanthemi
Peptide methionine sulfoxide reductase (MsrA), which repairs oxidized proteins, is present in most living organisms, and the cognate structural gene belongs to the so-called minimum gene set [Mushegian, A. R. & Koonin, E. V., (1996) Proc. Natl. Acad. Sci. USA 93, 10268–10273]. In this work, we report that MsrA is required for full virulence of the plant pa
The National Academy of Sciences.
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9. Utilization of a thermosensitive episome bearing transposon TN10 to isolate Hfr donor strains of Erwinia carotovora subsp. chrysanthemi.
A thermosensitive episome bearing the transposon Tn10, F(Ts)::Tn10 Lac+, has been successfully transferred from Escherichia coli to several wild strains of the enterobacteria Erwinia carotovora subsp. chrysanthemi, which are pathogenic on Saintpaulia ionantha. In one of these strains, all of the characters controlled by this episome (Lac+, Tetr, Tra+) were e
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10. Characterization of Indigoidine Biosynthetic Genes in Erwinia chrysanthemi and Role of This Blue Pigment in Pathogenicity
In the plant-pathogenic bacterium Erwinia chrysanthemi production of pectate lyases, the main virulence determinant, is modulated by a complex network involving several regulatory proteins. One of these regulators, PecS, also controls the synthesis of a blue pigment identified as indigoidine. Since production of this pigment is cryptic in the wild-type strai
American Society for Microbiology.
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11. Pectate lyase PelI of Erwinia chrysanthemi 3937 belongs to a new family.
Erwinia chrysanthemi 3937 secretes five major isoenzymes of pectate lyases encoded by the pel4, pelB, pelC, pelD, and pelE genes and a set of secondary pectate lyases, two of which, pelL and pelZ, have been already identified. We cloned the pelI gene, encoding a ninth pectate lyase of E. chrysanthemi 3937. The pelI reading frame is 1,035 bases long, correspo
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12. Characterization of the Exopolygalacturonate Lyase PelX of Erwinia chrysanthemi 3937
Erwinia chrysanthemi 3937 secretes several pectinolytic enzymes, among which eight isoenzymes of pectate lyases with an endo-cleaving mode (PelA, PelB, PelC, PelD, PelE, PelI, PelL, and PelZ) have been identified. Two exo-cleaving enzymes, the exopolygalacturonate lyase, PelX, and an exo-poly-α-d-galacturonosidase, PehX, have been previously identified in o
American Society for Microbiology.