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Registro Completo |
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
27/02/1997 |
Data da última atualização: |
19/04/2013 |
Autoria: |
TAVARES, S. |
Título: |
Contribuição para o conhecimento da anatomia foliar do " Gravatá do Moxotó" (Hoherbergia caruaruensis harmes). |
Ano de publicação: |
1957 |
Fonte/Imprenta: |
Recife: Universidade Rural de Pernambuco, 1957. |
Páginas: |
22 p. |
Descrição Física: |
il. |
Série: |
PERNAMBUCO. Universidade Rural. Comunicado Técnico, 3) |
Idioma: |
Português |
Conteúdo: |
Contribuicao para o conhecimento da estrutura foliar do "gravata do Moxoto", (Hohenbergia caruaruensis Harms). Descreve as diferenciacoes histologicas encontradas que sao as seguintes: epiderme ventral, sem estomatas; hipoderme ventral; parenquimas sub-hipodermico, palicadico, aquifero, aclorofilado e fundamental, clorofilado; feixes fibrovasculares; aerenquima, de celulas estreladas; feixes fibrosos; hipoderme dorsal, interrompida pelas camaras subestomacais e epiderme dorsal, com estomas, os quais tem pequenas celulas anexas sob as celulas guardas. Ha pelos escamiformes pluricelulares nas duas epidermes. Ha menor numero de feixes fibrosos por unidade de superficie do que no "Cargas" (Neoglaziovia variegata Menz.). |
Palavras-Chave: |
Gravata do Moxoto; Pernambuco; Recursos naturais. |
Thesagro: |
Anatomia; Botânica; Hohenbergia Caruaruensis. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 01372nam a2200205 a 4500 001 1127326 005 2013-04-19 008 1957 bl uuuu u0uu1 u #d 100 1 $aTAVARES, S. 245 $aContribuição para o conhecimento da anatomia foliar do " Gravatá do Moxotó" (Hoherbergia caruaruensis harmes). 260 $aRecife: Universidade Rural de Pernambuco$c1957 300 $a22 p.$cil. 490 $aPERNAMBUCO. Universidade Rural. Comunicado Técnico, 3) 520 $aContribuicao para o conhecimento da estrutura foliar do "gravata do Moxoto", (Hohenbergia caruaruensis Harms). Descreve as diferenciacoes histologicas encontradas que sao as seguintes: epiderme ventral, sem estomatas; hipoderme ventral; parenquimas sub-hipodermico, palicadico, aquifero, aclorofilado e fundamental, clorofilado; feixes fibrovasculares; aerenquima, de celulas estreladas; feixes fibrosos; hipoderme dorsal, interrompida pelas camaras subestomacais e epiderme dorsal, com estomas, os quais tem pequenas celulas anexas sob as celulas guardas. Ha pelos escamiformes pluricelulares nas duas epidermes. Ha menor numero de feixes fibrosos por unidade de superficie do que no "Cargas" (Neoglaziovia variegata Menz.). 650 $aAnatomia 650 $aBotânica 650 $aHohenbergia Caruaruensis 653 $aGravata do Moxoto 653 $aPernambuco 653 $aRecursos naturais
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Embrapa Semiárido (CPATSA) |
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Registro Completo
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
08/10/2014 |
Data da última atualização: |
19/05/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
TRINDADE, R. dos S.; ARAÚJO, A. P. |
Afiliação: |
ROBERTO DOS SANTOS TRINDADE, CNPMS; ADELSON PAULO ARAÚJO, UFRRJ. |
Título: |
Variability of root traits in common bean genotypes at different levels of phosphorus supply and ontogenetic stages. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Revista Brasileira de Ciência do Solo, Campinas, v. 38, n. 4, p. 1117-1180, 2014. |
Idioma: |
Português |
Conteúdo: |
Selection of common bean (Phaseolus vulgaris L.) cultivars with enhanced root growth would be a strategy for increasing P uptake and grain yield in tropical soils, but the strong plasticity of root traits may compromise their inclusion in breeding programs. The aim of this study was to evaluate the magnitude of thegenotypic variability of root traits in common bean plants at two ontogenetic stages and two soil P levels. Twenty-four common bean genotypes, comprising the four growth habits that exist in the species and two wild genotypes, were grown in 4 kg pots at two levels of applied P (20 and 80 mg kg -1) and harvested at the stages of pod setting and early pod filling. Root area and root length were measured by digital image analysis. Significant genotype × P level and genotype × harvest interactions in analysis of variance indicate that the genotypic variation of root traits depended on soil nutrient availability and the stage at which evaluation was made. Genotypes differed for taproot mass, basal and lateral root mass, root area and root length at both P levels and growth stages; differences in specific root area and length were small. Genotypes with growth habits II (upright indeterminate) and III (prostrate indeterminate) showed better adaptation to limited P supply than genotypes of groups I (determinate) and IV (indeterminate climbing). Between the two harvests, genotypes of groups II and III increased the mass of basal and lateral roots by 40 and 50 %, respectively, whereas genotypes of groups I and IV by only 7 and 19 %. Values of the genotypic coefficient of determination, which estimates the proportion of phenotypic variance resulting from genetic effects, were higher at early pod filling than at pod setting. Correlations between shoot mass and root mass, which could indicate indirect selection of root systems via aboveground biomass, were higher at early pod filling than at pod setting. The results indicate that selection for root traits in common bean genotypes should preferentially be performed at the early pod-filling stage. MenosSelection of common bean (Phaseolus vulgaris L.) cultivars with enhanced root growth would be a strategy for increasing P uptake and grain yield in tropical soils, but the strong plasticity of root traits may compromise their inclusion in breeding programs. The aim of this study was to evaluate the magnitude of thegenotypic variability of root traits in common bean plants at two ontogenetic stages and two soil P levels. Twenty-four common bean genotypes, comprising the four growth habits that exist in the species and two wild genotypes, were grown in 4 kg pots at two levels of applied P (20 and 80 mg kg -1) and harvested at the stages of pod setting and early pod filling. Root area and root length were measured by digital image analysis. Significant genotype × P level and genotype × harvest interactions in analysis of variance indicate that the genotypic variation of root traits depended on soil nutrient availability and the stage at which evaluation was made. Genotypes differed for taproot mass, basal and lateral root mass, root area and root length at both P levels and growth stages; differences in specific root area and length were small. Genotypes with growth habits II (upright indeterminate) and III (prostrate indeterminate) showed better adaptation to limited P supply than genotypes of groups I (determinate) and IV (indeterminate climbing). Between the two harvests, genotypes of groups II and III increased the mass of basal and lateral roots by 40 and 50 %, respectivel... Mostrar Tudo |
Thesagro: |
Feijão; Phaseolus vulgaris; Sistema radicular. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/109685/1/Variability-root.pdf
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Marc: |
LEADER 02655naa a2200169 a 4500 001 1996866 005 2017-05-19 008 2014 bl uuuu u00u1 u #d 100 1 $aTRINDADE, R. dos S. 245 $aVariability of root traits in common bean genotypes at different levels of phosphorus supply and ontogenetic stages.$h[electronic resource] 260 $c2014 520 $aSelection of common bean (Phaseolus vulgaris L.) cultivars with enhanced root growth would be a strategy for increasing P uptake and grain yield in tropical soils, but the strong plasticity of root traits may compromise their inclusion in breeding programs. The aim of this study was to evaluate the magnitude of thegenotypic variability of root traits in common bean plants at two ontogenetic stages and two soil P levels. Twenty-four common bean genotypes, comprising the four growth habits that exist in the species and two wild genotypes, were grown in 4 kg pots at two levels of applied P (20 and 80 mg kg -1) and harvested at the stages of pod setting and early pod filling. Root area and root length were measured by digital image analysis. Significant genotype × P level and genotype × harvest interactions in analysis of variance indicate that the genotypic variation of root traits depended on soil nutrient availability and the stage at which evaluation was made. Genotypes differed for taproot mass, basal and lateral root mass, root area and root length at both P levels and growth stages; differences in specific root area and length were small. Genotypes with growth habits II (upright indeterminate) and III (prostrate indeterminate) showed better adaptation to limited P supply than genotypes of groups I (determinate) and IV (indeterminate climbing). Between the two harvests, genotypes of groups II and III increased the mass of basal and lateral roots by 40 and 50 %, respectively, whereas genotypes of groups I and IV by only 7 and 19 %. Values of the genotypic coefficient of determination, which estimates the proportion of phenotypic variance resulting from genetic effects, were higher at early pod filling than at pod setting. Correlations between shoot mass and root mass, which could indicate indirect selection of root systems via aboveground biomass, were higher at early pod filling than at pod setting. The results indicate that selection for root traits in common bean genotypes should preferentially be performed at the early pod-filling stage. 650 $aFeijão 650 $aPhaseolus vulgaris 650 $aSistema radicular 700 1 $aARAÚJO, A. P. 773 $tRevista Brasileira de Ciência do Solo, Campinas$gv. 38, n. 4, p. 1117-1180, 2014.
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Embrapa Milho e Sorgo (CNPMS) |
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