Search | SciELO

Need help?

Add field +

Search history

No documents were found for your search

Results: 9

au:MENEZES, L.F.

Filters

Collection + Options

All
Brazil

7
Chile

1
Spain

1

Journal + Options

All
Anais da Escola Superior de Agricultura Luiz de Queiroz

2
Archivos de Zootecnia

1
Brazilian Journal of Medical and Biological Research

1
Chilean journal of agricultural research

1
Fitopatologia Brasileira

1
Jornal de Pediatria

1
Papéis Avulsos de Zoologia

1
Revista Árvore

1

Language

All
Portuguese

4

Publication Year + Options

All
2021

2
1975

1
1976

1
2002

1
2006

1
2010

1
2011

1
2017

1

SciELO Thematic Areas + Options

All
Agricultural Sciences

5
Health Sciences

3
Biological Sciences

2

WoS Subject Categories + Options

All
Agriculture

3
Multidisciplinary

3
Agronomy

2
Sciences

2
Zoology

2
Biology

1
Experimental

1
Forestry

1
Medicine

1
Pediatrics

1
Plant

1
Research

1
Veterinary

1

WoS Citation Index

All
Science Citation Index Expanded

4

Citables and non citables

All
Citable

9

Type of Literature + Options

All
Article

7
Brief report

1
Review article

1

Order by

Page of 1 Next

Select this page

Print | Send to email | Export |

Facebook
Twitter
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

0 Selected itens

List all
Erase all

Excess adiposity and low physical fitness hamper Supine-to-Stand test performance among sedentary adolescents
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Tadiotto, Maiara C.

; Duncan, Michael

; Mota, Jorge

; Moraes-Junior, Frederico B.

; Corazza, Patricia R.P.

; Czoczuk, Matheus

; Menezes-Junior, Francisco J. de

; Tozo, Tatiana A.A.

; Coelho-e-Silva, Manuel J.

; Rodacki, André L.F.

; Leite, Neiva

Jornal de Pediatria

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2021, Volume 97 N. 6 Pages 658 - 664

Abstract: En | Text: En | PDF: En

Abstract Objective: The aim of this study was to analyze the relationship between body adiposity and physical fitness with performance in the Supine-to-Stand test (STS-test) in sedentary adolescents. Methods: Sixty-two adolescents, of both sexes, between 10 and 16 years old, participated in the study. Body mass (BM), height, waist circumference (WC), fat mass (FM), fat-free mass (FFM), right and left handgrip strength (HGS-right, HGS-left), abdominal resistance (ABDO), flexibility (FLEX), and cardiorespiratory fitness (VO2peak) were measured. Body mass index (BMI), z-score BMI (BMI-z), tri-ponderal mass index (TMI) and waist-to-height ratio (WHtR) were calculated. The STS-test was applied to evaluate the STS-MC by the movement patterns in the execution of the test. The STS-time in seconds (s) was categorized into terciles: fast (FG < 2.0 s), intermediate (IG = 2.0-2.6 s) and slow (SG > 2.6 s). One-way ANOVA, Chi-square, Spearman’s correlation coefficient as well as non-parametric tests were used, with significance p 0.05. Results: The SG presented higher BMI, BMI-z, TMI, WHtR, FM, %FM, as well as lower averages for %FFM, HGS-right, HGS-left, FLEX, ABDO, VO2peak, VO2peak relative to BM (VO2peakBM) in relation to GF. The BMI, BMI-z, TMI, WC, WHtR and FM showed moderate and direct correlations with STS-time and inverse with STS-MC (p < 0.01). HGS-right, HGS-left, ABDO, and VO2peakBM showed moderate and an inverse correlation with STS-time (p < 0.05). The VO2peakBM was moderate and with direct correlations to STS-MC (p < 0.01). Conclusion: It is concluded that excess fat and low physical fitness hamper STS-test performance. Therefore, the STS-test can be used for screening students to assess MC.

https://doi.org/10.1016/j.jped.2021.01.007 1 downloads

MORPHOLOGICAL DESCRIPTORS FOR THE CHARACTERISATION OF TEAK CLONES CUTTINGS (Tectona grandis L.F.)
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Reategui-Betancourt, Jorge Luis

; Arriel, Daniele Aparecida Alvarenga

; Caldeia, Sidney Fernando

; Higa, Antonio Rioyei

; Marques, Rudmilla Menezes

; Gonçalves, Irivan dos Santos

; Martinez, Diego Tyszka

Revista Árvore

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2021, Volume 45 elocation e4522

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Teca (Tectona grandis) é uma espécie florestal cultivada em regiões tropicais do mundo, devido às características de sua madeira e seu grande valor econômico no mercado. No Brasil, as plantações originais estão sendo substituídas por florestas clonais selecionadas, o que gera a necessidade e o interesse de proteger esse material genético com base na legislação vigente. Os requisitos legais para proteção de cultivares são que o genótipo seja resultante de melhoramento genético e apresentar distinguibilidade, homogeneidade e estabilidade (DHE). Este trabalho identifica descritores morfológicos em mudas de teca para auxiliar no processo de proteção dos clones da espécie. O estudo foi conduzido em delineamento inteiramente casualizado com avaliação de 7 clones e 15 mudas por clone, avaliados com 30, 60, 90 e 120 dias de idade. As informações foram organizadas com base nas matrizes de presença e ausência das variações para cada clone, por 21 características morfológicas. Posteriormente, foram estimadas medidas de similaridade genética, por meio do índice de Jaccard e o agrupamento pelo método UPGMA. Foi possível diferenciar os clones, com 12, 7, 9 e 11 caracteres morfológicos para compor os descritores morfológicos com 30, 60, 90 e 120 dias de idade, respectivamente. As características da lâmina foliar: comprimento, largura, relação comprimento/largura, intensidade da cor verde da folha e brilho da folha, foram comuns para todas as idades avaliadas, mas seus respectivos níveis de expressão foram diferentes.

ABSTRACT Teak (Tectona grandis) is a forest species cultivated in tropical regions worldwide, due to the traits of its wood and its great economic value on the market. In Brazil, original plantations are being replaced by selected clonal forests, which generate the need and interest to protect this genetic material based on the current legislation. The legal requirements for cultivar protection are that the genotype must result from genetic improvement and provide distinguishability, homogeneity, and stability (DHS). This work identifies morphological descriptors in teak cuttings to assist the clone protection process of the species. The study was conducted in a completely randomized design with the evaluation of 7 clones and 15 cuttings per clone, at 30, 60, 90, and 120 days old. The information was also organized based on the arrays of presence and absence of variations for each clone, for 21 morphological traits. Subsequently, genetic similarity measures were estimated using the Jaccard index and the UPGMA clustering method. The clones with the 12, 7, 9, and 11 morphological traits formed the morphological descriptors for the 30, 60, 90, and 120 days old cuttings, respectively. The traits of the leaf blade: length, width, length/width ratio, green intensity, and the brightness of the leaf, were common for all the evaluated ages, but their respective levels of expression were different.

https://doi.org/10.1590/1806-908820210000022 230 downloads

Genetic diversity of elephant grass (Cenchrus purpureus [Schumach.] Morrone) for energetic production based on quantitative and multi-category traits
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Oliveira, María L.F.

; Daher, Rogério F.

; Menezes, Bruna R.S.

; Vivas, Marcelo

; Rocha, Avelino dos S.

; Ponciano, Niraldo J.

; T. Amaral-Junior, Antonio

; Araujo, Maria do S.B.

; Pereira, Telma N.S.

; Silva, Veronica B.

Chilean journal of agricultural research

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2017, Volume 77 N. 1 Pages 48 - 57

Abstract: En | Text: En | PDF: En

ABSTRACT Elephant grass (Cenchrus purpureus (Schumach.( Morrone) has been used as an alternative source of energy. It is widely cultivated in Brazil, however it needs genotypes adapted to different ecosystems of the country. The knowledge of genetic diversity allows the identification of genotypes that can be used in breeding programs. Thus, this study aimed to evaluate the diversity among 85 genotypes of elephant grass by Tocher's clustering method and by the unweighted pair group method with arithmetic averages (UPGMA), using quantitative and multi-category traits in 2 yr of evaluations. The experiment was implemented in the State Center for Research on Bioenergy and Waste Use at Pesagro-Rio, located in Campos dos Goytacazes, Rio de Janeiro, Brazil. Eighty-five elephant grass genotypes donated by the Active Elephant Grass Germplasm Bank of Embrapa Dairy Cattle, in Coronel Pacheco, Minas Gerais, Brazil, were included in the experiment. The experimental design was arranged as randomized blocks, with two replicates. Based on the quantitative traits, the 85 genotypes analyzed belonged to 17 groups according to Tocher's optimization method and to 13 groups when analyzed by UPGMA. For the qualitative traits, however, the genotypes formed 10 groups for both methods. Therefore, the multivariate technique indicated genetic divergences among the genotypes and allowed the formation of similarity groups by Tocher's optimization and UPGMA methods for both the quantitative and qualitative traits.

832 downloads

A systematic review of diapoma (teleostei: characiformes: characidae: stevardiinae: diapomini) with descriptions of two new species from southern Brazil
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Menezes, Naércio A.

; Weitzman, Stanley H.

Papéis Avulsos de Zoologia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2011, Volume 51 N. 5 Pages 59 - 82

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Diapoma é revisto e quatro espécies, são reconhecidas: (1) Diapoma thauma, espécie nova, de riachos bacia do rio Jacuí no estado do Rio Grande do Sul; (2) D. pyrrhopteryx, espécie nova, coletada no rio Canoas e riachos que desembocam nesta bacia hidrográfica nos estados do Rio Grande do Sul e Santa Catarina, Brasil; (3) Diapoma terofali, de riachos que desembocam no rio Uruguai, Uruguai e Rio Grande do Sul, Brasil e riachos pertencentes à bacia do rio de La Plata, Argentina; e (4) Diapoma speculiferum, de rios costeiros de planície no Rio Grande do Sul, Brasil e Uruguai. Diapoma pyrrhopteryx possui o alongamento da parte póstero-ventral do opérculo, típico de D. speculiferum, espécie tipo do gênero, mas que está ausente em D. thauma e D. terofali. Entretanto, todas as espécies têm o órgão caudal em forma de bolsa quase igualmente desenvolvido tanto em machos como em fêmeas e porção dorsal da abertura do órgão margeada por uma série de 3 a 8 escamas alongadas, que representam as duas características exclusivas do grupo. As duas espécies previamente descritas, D. speculiferum e D. terofali são redescritas. Hipóteses prévias de relações filogenéticas entre os gêneros de Diapomini, Planaltina, Diapoma e Acrobrycon são discutidas com base em informações morfológicas preliminares. É proposto que o grupo a que pertencem, Diapomini, é monofilético. Uma chave para identificação, informação sobre dimorfismo sexual, anatomia das gônadas, modo de reprodução e distribuição geográfica das espécies são incluídos.

Diapoma is reviewed and four species are recognized: (1) Diapoma thauma, new species, from streams of the rio Jacuí basin, state of Rio Grande do Sul; (2) D. pyrrhopteryx, new species collected from the rio Canoas and streams flowing into this basin in the states of Rio Grande do Sul and Santa Catarina, Brazil; (3) Diapoma terofali, from streams flowing into rio Uruguay in Uruguay and Rio Grande do Sul, Brazil and streams flowing into rio de la Plata, Argentina; and (4) Diapoma speculiferum, from lowland coastal streams in Rio Grande do Sul, Brazil and Uruguay. Diapoma pyrrhopteryx possess the posteroventral opercular elongation typical of D. speculiferum, type species of the genus, but which is absent in D. thauma and D. terofali. Nonetheless, all the diapomin species have the caudal pouch organ about equally developed in both sexes and the dorsal portion of the pouch opening bordered by a series of 3 to 8 elongated scales, the two derived features that characterize the group. The two previously described species, D. speculiferum and D. terofali, are redescribed. Previous hypotheses of relationships among the diapomin genera Planaltina, Diapoma and Acrobrycon are discussed on the basis of preliminary morphological information. It is proposed that the Diapomini is a monophyletic group. An identification key, information on sexual dimorphism, gonad anatomy, reproductive mode and distribution of the species of Diapoma are provided.

3177 downloads

Desempenho de ovinos Santa Inês suplementados em três gramíneas pastejadas durante o período seco
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Menezes, L.F. de O.

; Louvandini, H

; Martha Júnior, G.B

; McManus, C.

; Barroso, G.G.J.E.

; Mendes, M.C. de B.

Archivos de Zootecnia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jun 2010, Volume 59 N. 226 Pages 299 - 302

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

The performance of Santa Inês sheep on three tropical grasses (A. gayanus Kunth. cv. Planaltina, P. maximum Jacq. cv. Aruana and P. maximum Jacq. cv. Tanzânia), and rotational grazing with an occupation period of 14 days and fixed stocking rate of 22 animals/ha, was evaluated in the dry season. The experimental period was 82 days, and the individual performance of 11 lambs on each treatment was measured. With the progression of the dry season, increasing levels of concentrate supplementation was used (300, 400 and 500 g/animal/day for each of the three treatments). Samples of grass leaf blades were taken each 14 days, and bromatological analysis carried out. The weight of animals, measured each 14 days, was used to calculate average dairy gain (GMD), final weight (PF), accumulated gain (GAC) and body condition (CC). The treatments Aruana and Tanzânia showed highest (p<0.05) GMD, respectively with 93.6 and 92.0 g/animal/day, not differing between each other (p>0.05). The animals on Andropogon pasture showed a mean weight gain of 35.6 g/animal/day. For PF, GAC and CC the treatments Aruana and Tanzânia showed the best results (p<0.05), when compared with Andro-pogon. The forage Aruana and Tanzânia, caused better performance in sheep during the dry season compared to Andropogon.

Avaliou-se o desempenho de ovinos da raça Santa Inês, em três gramíneas forrageiras tropicais (A. gayanus Kunth. cv. Planaltina, P. maximum Jacq. cv. Aruana e P. maximum Jacq. cv. Tanzânia), em pastejo rotacionado, com período de ocupação de 14 dias e lotação fixa de 22 animais/ha, no período da seca. O período experimental foi de 82 dias, onde o desempenho de 11 borregos, em cada tratamento, foi acompanhado em um delineamento inteiramente casualizado. Com o avançar da seca foram utilizados níveis crescentes de 300, 400 e 500 g/animal/dia de suplementação concentrada para os três tratamentos. Nas forragens foram colhidas amostras a cada 14 dias para efetuar as análises bromatológicas. Através da verificação do peso dos animais, realizadas a cada 14 dias, foram obtidos o peso vivo, o ganho médio diário (GMD), o peso final (PF), o ganho acumulado (GAC) e a condição corporal (CC). Os ovinos alimentados com Aruana e Tanzânia apresentaram GMD de 93,6 e 92,0 g/animal/dia, respectivamente não diferindo entre si (p>0,05), mas foram superiores aos do Andropogon 35,6 g/animal/dia (p<0,05). Para PF, GAC e CC os tratamentos Aruana e Tanzânia também proporcionaram os melhores resultados (p<0,05), quando comparados aos observados com o tratamento Andropogon. Os tratamentos Aruana e Tanzânia proporcionaram melhores desempenhos dos ovinos durante o período seco em relação ao Andropogon.

466 downloads

Molecular and cellular pathogenesis of autosomal recessive polycystic kidney disease
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Menezes, L.F.

; Onuchic, L.F.

Brazilian Journal of Medical and Biological Research

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2006, Volume 39 N. 12 Pages 1537 - 1548

Abstract: En | Text: En | PDF: En

Autosomal recessive polycystic kidney disease (ARPKD) is an inherited disease characterized by a malformation complex which includes cystically dilated tubules in the kidneys and ductal plate malformation in the liver. The disorder is observed primarily in infancy and childhood, being responsible for significant pediatric morbidity and mortality. All typical forms of ARPKD are caused by mutations in a single gene, PKHD1 (polycystic kidney and hepatic disease 1). This gene has a minimum of 86 exons, assembled into multiple differentially spliced transcripts and has its highest level of expression in kidney, pancreas and liver. Mutational analyses revealed that all patients with both mutations associated with truncation of the longest open reading frame-encoded protein displayed the severe phenotype. This product, polyductin, is a 4,074-amino acid protein expressed in the cytoplasm, plasma membrane and primary apical cilia, a structure that has been implicated in the pathogenesis of different polycystic kidney diseases. In fact, cholangiocytes isolated from an ARPKD rat model develop shorter and dysmorphic cilia, suggesting polyductin to be important for normal ciliary morphology. Polyductin seems also to participate in tubule morphogenesis and cell mitotic orientation along the tubular axis. The recent advances in the understanding of in vitro and animal models of polycystic kidney diseases have shed light on the molecular and cellular mechanisms of cyst formation and progression, allowing the initiation of therapeutic strategy designing and promising perspectives for ARPKD patients. It is notable that vasopressin V2 receptor antagonists can inhibit/halt the renal cystic disease progression in an orthologous rat model of human ARPKD.

4137 downloads Cited 1 time in SciELO

Estudo comparativo de isolados de Colletotrichum graminicola através da análise eletroforética de padrões protéicos e isoenzimáticos
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

LIMA, MARIA L.F.

; MENEZES, MARIA

Fitopatologia Brasileira

Journal Metrics
- Sobre o periódico
- SciELO Analytics

feb 2002, Volume 27 N. 1 Pages 12 - 16

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Colletotrichum graminicola, agente causal da antracnose ou podridão do colmo do milho (Zea mays), é um importante patógeno com alta variabilidade genética. Nove isolados desta espécie foram comparados através do uso da análise eletroforética em gel de poliacrilamida, utilizando três sistemas: proteínas totais, esterase e fosfatase ácida. A análise mostrou variação no número e posição das bandas no gel, dentro de cada sistema estudado. Com relação a proteínas totais, foi observado maior polimorfismo, embora os isolados Cgr8 e Cgr9 tenham mostrado idêntico perfil com seis bandas protéicas de mesma mobilidade relativa. Na atividade esterásica, esses mesmos isolados apresentaram um comportamento monomórfico, enquanto os demais revelaram polimorfismo. Na análise fosfatase ácida, todos os isolados mostraram-se semelhantes quanto à presença de duas bandas, porém diferentes em relação a mobilidade das moléculas no gel. Igualdade de comportamento, quanto à mobilidade relativa das bandas de fosfatase ácida, foi observada entre Cgr1 e Cgr2, como também entre Cgr6 , Cgr7 e Cgr8. Em geral, nos três sistemas testados, os isolados de C. graminicola apresentaram bandas em comum, indicando a relação existente entre eles, e que a variação fenotípica observada seja provavelmente decorrente da condição nuclear, homozigótica ou heterozigótica, de cada isolado do fitopatógeno.

Colletotrichum graminicola, the causal agent of anthracnose or stalk rot of corn (Zea mays), is an important pathogen with a high genetic variability. Nine isolates of this phytopathogen were compared by using isozyme analysis with polyacrylamide gel electrophoresis in three systems: proteins, esterase and acidic phosphatase. Analysis by each system showed variation in the number, intensity, and relative mobility of the bands in the gel of the pathogen population. For protein the analysis revealed polymorphism eventhough Cgr8 and Cgr9 isolates have shown the same pattern with six bands of relative position in the gel. For esterase activity, the same isolates showed a monomorphic behaviour while the other isolates revealed polymorphic phenotypes. In relation to acidic phosphatase, all isolates presented two bands, but differences in mobility of the molecules were observed, except between Cgr1 and Cgr2 and among Cgr6, Cgr7 and Cgr8. In general, the isolates produced bands in common, indicating that they are closely related to each other, and that the phenotypic variation observed, is probably the result of a nuclear condition, homozygous or heterozygous, for each enzyme system tested.

1639 downloads

Estudos sobre a nutrição mineral do milho: II. efeito de doses crescentes de N, R e K no crescimento, produção e composição mineral da variedade Piranão em condições controladas
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Malavolta, E.

; Basso, L. C.

; Oliveira, E G. D.

; Vasconcellos, C. A.

; Santos, Z. G.

; Fortes, J. M.

; Fernandes, J.

; Stamford, N.P.

; Lorenzi, J.O.

; Sampaio, N. F.

; Hass, F. J.

; Freire, J. C.

; Souza, M.

; Ventorim, N.

; Victoria F, R.

; Rosalén, CA.

; Zago, E.A.

; Miranda, M.T.

; Lima, S.A.

; Castro, A.M.G.

; Souza, A.P.

; Lopes, E.S.

; Sobral, L.F.

; Lovato, L.A.

; Menezes, M.

; Tisselli F, E O.

Anais da Escola Superior de Agricultura Luiz de Queiroz

Journal Metrics
- Sobre o periódico
- SciELO Analytics

1976, Volume 33 Pages 479 - 499

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O milho, var. Piranão, foi cultivado em solução nutritiva com níveis crescentes de N, R e K. Houve resposta linear à adição de N e assintótica às doses de R e de K. A determinação da atividade da reductase de nitrato se correlacionou melhor com a produção da matéria seca que a do N total nas folhas. O teor de potássio total nas folhas, por sua vez refletiu melhor o estado nutricional que a determinação de putrescina nas folhas.

Maize plants, Piranão cultivar, were grown in nutrient solution with 5 levels each of N, R and K till harvest. Nitrate reductase activity and putrescine level were determined in leaves of plants in the N and K series, respectively, at silking stage. Upper and lower leaves were analysed for N, R and K in the corresponding treatments at the end of the life cycle. The main conclusions were the following : 5.1 There was a linear effect of level of N in the substrate on dry matter production. 5.2. High activities of nitrate reductase suggest that under natural conditions the variety should be very responsive to N fertilization. 5.3. An asymptotic response curve was found in the treatments with increasing levels of R in the medium, as well as in the case of the K treatments. 5.4. Curves of response of roots (dry matter) showed a tendency to level of as a function of increasing levels of element at lower concentrations than the components aeral part of the plant (leaves, stems, ears). 5.5. Determination of leaf putrescine did not of prove a better indicator of the K status leaf K. 5.6. The variety under study seems to be relatively more efficient in the utilization of N for yield components; the efficiency for utilization of K, is rather low and that for R is intermediate, findings that should have a bearing on the fertilization in field conditions.

1050 downloads

Estudos sobre a nutrição mineral do milho: II - deficiências de macronutrientes na variedade Piranão
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Malavolta, E.

; Rapchan, V.M.

; Castro, A.M.G. de

; Souza, A.P.

; Lopes, E.S.

; Sobral, L.F.

; Lovato, L.A.

; Menezes, M.

; Tisselli Fº, O.

; Oliveira, G.D.

Anais da Escola Superior de Agricultura Luiz de Queiroz

Journal Metrics
- Sobre o periódico
- SciELO Analytics

1975, Volume 32 Pages 509 - 525

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Foram induzidos sintomas de carência de macronutrientes no milho, var. Piranão, exceto no caso do enxofre. Os níveis foliares de N, P, K, Ca, Mg e S foram determinados nas plantas sujeitos à nutrição completa e às deficiências de macronutrientes.

Corn plants, Piranão variety, were grown in nutrient solution, complete and with omission of one macronutrient each time, in order to gain information on the effects of treatments on growth, symptoms of deficiency, and mineral composition of the leaves. The following symptoms of deficiency were obtained: Nitrogen -- plants underdeveloped; "V" shaped chlorosis beginning in the older leaves followed by drying and necrosis; Phosphorus - older leaves dark green with a purple hve; Potassium - plants underdeveloped; marginal chlorisis and necrosis in the older leaves; iron induced chlorosis in the younger leaves; Calcium - plants very underdeveloped due to death of apical merystem; younger leaves showing tip and marginal chlorosis and afterwards necrosis and break down of the tissue; wide whitish areas in the younger leaves; Magnesium - plants very underdeveloped; internerval chlorosis in older leaves first, proceeding to the young ones; Sulfur - absence of marked symptoms, except for a slight chlorosis in the younger leaves. Dry matter production obeyed the following decreasing order: Complete, minus S, minus P, minus K, minus Mg, minus N and minus Ca. Ears were obtained only in treatments complete and minus S. Top/root ratio decreased according to this order: minus S, complete, minus K, minus Mg, minus N, minus P and minus Ca. The macronutrient content for the treatment complete was the following respectively for lower and upper, leaves: N - 2.76 and 2.52%; P - 0.59 and 0.53%; K - 2.25 and 2.26%;Ca - 2.17 and 1.85;Mg - 0.82 and0.66;S - 0.38 and 0.32. The values of the element corresponding to each treatment were: N - 1.84 and 1.22 (that is: lower leaves in the minus N plants had 1 84% N, whereas the upper leaves in same treatment had 1.22% N; P - 0.14 and 0.17%; K - 0.29 and 0.78%; Ca - 0.29 and 0.05; Mg -0.09 and 0.05%; S- 0.31 and 0.26%.

975 downloads

Showing

itens per page

Page of 1 Next

Select one or more results

All Alphabetic

Results

Comparative chart Download CSV

Statistics of

Send result

To*

Use ; (semicolon) to insert more emails.

Send to email

This page

Selected records

All references (max. 300)

Your email

Subject

Comments

Export format:

RIS (for EndNote, ProCite, Reference Manager, RefWorks, Citavi, etc.)

BibTeX

Citation

CSV (for Excel, etc)

Export:

This page

Selected itens

All references (max. 2000)

Sem resultados

No documents were found for your search

Glossary and search help

You can enrich your search in a very simple way. Use the search indexes combined with the connectors (AND or OR) and specify more your search.

For example, if you want to search for articles about
cases of dengue in Brasil in 2015, use:
ti:dengue and publication_year:2015 and aff_country:Brasil

See below the complete list of search indexes that can be used:

Index code	Element
ti	article title
au	author
kw	article keywords
subject	subject (title words, abstract and keywords)
ab	abstract
ta	journal short title (e.g. Cad. Saúde Pública)
journal_title	journal full title (e.g. Cadernos de Saúde Pública)
la	publication language code (e.g. pt - Portuguese, es - Spanish)
type	document type
pid	publication identifier
publication_year	publication year of publication
sponsor	sponsor
aff_country	country code of the author's affiliation
aff_institution	author affiliation institution
volume	article volume
issue	article issue
elocation	elocation
doi	DOI number
issn	journal ISSN
in	SciELO colection code (e.g. scl - Brasil, col - Colômbia)
use_license	article usage license code

SciELO - Scientific Electronic Library Online
Rua Dr. Diogo de Faria, 1087 – 9º andar – Vila Clementino 04037-003 São Paulo/SP - Brasil
Email: scielo@scielo.org

All the contents of this site www.scielo.br, except where otherwise noted, is licensed under a Creative Commons Attribution License.
more »