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| Registros recuperados: 48 | |
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| Ronchi,C.P.; Terra,A.A.; Silva,A.A.. |
| The effects of competition of six weed species on growth, nutrient concentration and nutrient content of coffee plant root system under greenhouse conditions were evaluated. Thirty days after coffee seedling transplantation into 12 L pots with soil level area of 6.5 dm². Weeds were transplanted or sowed in these pots, at densities of 0, 1, 2, 3, 4 and 5 plants per pot. The duration of competition (or weedy periods) from weed transplantation or emergence until plant harvesting, at the weed preflowering stage, were (in days): 77 (Bidens pilosa), 180 (Commelina diffusa), 82 (Leonurus sibiricus), 68 (Nicandra physaloides), 148 (Richardia brasiliensis) and 133 (Sida rhombifolia). Dry matter of coffee plants was linearly reduced with increasing B. pilosa and S.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica; Weed density; Interference; Mineral nutrition; Root. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582007000400004 |
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| PITA,PATRÍCIA B.; MENEZES,NANUZA L.. |
| O estudo anatômico da raiz em espécies de Dyckia e Encholirium mostra, como característica marcante, a presença de uma epiderme pluriestratificada, constituindo um velame. No epivelame, encontram-se os pêlos radiculares. A hipoderme é formada por células mortas de paredes espessadas e algumas células de passagem vivas de paredes não espessadas. Em diferentes níveis, apresenta-se uni ou plurisseriada e totalmente lignificada. Observa-se, também, o espessamento e a lignificação das paredes celulares de outras regiões do córtex em maior ou menor profundidade, dependendo do nível considerado (mais próximo do caule, mais espessado). Excluindo a raiz primária da planta jovem, todas as demais são adventícias, com medula ampla. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bromeliaceae; Root; Anatomy; Velamen. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000100005 |
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| Araújo,Adelson Paulo; Teixeira,Marcelo Grandi. |
| Shoot biomass is considered a relevant component for crop yield, but relationships between biological productivity and grain yield in legume crops are usually difficult to establish. Two field experiments were carried out to investigate the relationships between grain yield, biomass production and N and P accumulation at reproductive stages of common bean (Phaseolus vulgaris) cultivars. Nine and 18 cultivars were grown on 16 m² plots in 1998 and 1999, respectively, with four replications. Crop biomass was sampled at four growth stages (flowering R6, pod setting R7, beginning of pod filling R8, and mid-pod filling R8.5), grain yield was measured at maturity, and N and P concentrations were determined in plant tissues. In both years, bean cultivars differed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Common bean; Genotype; Ontogeny; Phaseolus vulgaris; Plant growth; Root. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000500019 |
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| Machado,Bruno Dalaz; Magro,Maicon; Souza,Deivid Silva de; Rufato,Leo; Kretzschmar,Aike Anneliese. |
| Abstract Information on root development is an essential tool capable of identifying, among plants of a species, the one that has the greatest capacity to potentiate growth and development characteristics in its aerial part. The aim of this study was to characterize the distribution of the root system throughout the soil profile of different European pear cultivars and quince rootstock combinations on medium plant density systems (2500 plants ha-1). The combinations evaluated were: Abbè Fetel/Adams, Clapp´s Favourite/EMA, Santa Maria/Adams, Rocha/Adams, Decana du Comice/Adams, Packham´s Triumph/EMA, Packham´s Triumph/Adams and Conference/ Adams. In relation to effective depth, it was observed that up to 40 cm deep, 80% of the total root length and 83% of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pyrus communis L.; Cydonia oblonga L.; Root. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000200701 |
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| Megda,Marcio Mahmoud; Monteiro,Francisco Antonio. |
| The objective of this work was to study morphogenic characteristics, and dry matter production of roots and shoots of marandu palisadegrass (Brachiaria brizantha cv. Marandu) submitted to combinations of nitrogen and potassium, in a nutritive solution, employing silica as substrate. The experiment was carried out in a greenhouse during the summer. It was used a 5² fractionated factorial scheme with 13 combinations of nitrogen and potassium, which were distributed in a randomized block design, with four replications. The nitrogen × potassium interaction was significant for the number of tillers and leaves, for leaf area, for shoots and root section dry mass, for total length and surface and specific length and surface in the roots. Production of aerial part... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria brizantha; Leaf; Nutrient solution; Root; Shoot; Tiller. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000800007 |
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| Scheffer-Basso,Simone Meredith; Brustolin,Ricardo; Dall'Agnol,Miguel. |
| The objective of this work was to evaluate the response of five birdsfoot trefoil populations (Lotus corniculatus L.), selected under severe and intense grazing (P38, P37, P9 and P3) or cutting (population Corte), one rhizomatous population from Morocco and two cultivars, São Gabriel (Brazil) and ARS 2620 (USA), to different cutting intervals (20 and 40 days). The trial was carried out in a greenhouse for 224 days. The plants were submitted to the treatments during four months, when it was made four and two cuttings for the 20 and 40 day intervals, respectively. In the following months, aerial part of the plants was totally removed and after 70 days of regrowth, evaluation of roots and aerial section were performed. Analysis of variance and multivariate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birdsfoot trefoil; Forage production; Management; Root. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000800004 |
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| Sales,Rita Manuele Porto; Fries,Daniela Deitos; Bonomo,Paulo; Pires,Aureliano José Vieira; Campos,Cleide Nascimento; Brito,Paulo Henrique Rodrigues; Pereira,Iracema Souza; Santos,Joelma da Silva. |
| The objective was to evaluate the growth of Arachis pintoi fertilized with nitrogen and water deficiency conditions. The study was developed in a 4 × 4 factorial arrangement with four nitrogen levels (0, 40, 80 and 120 kg N/ha) and four irrigation levels (25, 50, 75 and 100% of field capacity), in a completely randomized experimental design, with four replications. High doses of N benefited the production of root shoots while the root increased its production at a dose of 40 kg N/ha. The number of green and senescent leaves were influenced by N fertilization and the water regime, where higher doses of N provided greater total number of green leaves (364 leaves/pot) and the limitation of water resulted in a greater number of senescent leaves (78... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Legume; Morphogenesis; Root; Water. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000300001 |
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| Scheffer-Basso,Simone Meredith; Favaretto,Adriana; Felini,Vanderleia; Cecchin,Kalinca. |
| This study evaluated the morphological development of two populations of tough lovegrass during 120 days of continuous growth (Experiment I), and the regrowth of one population under the combination of cutting height (5 cm and 10 cm) and phenological stage at the first cutting (vegetative and beginning of flowering; Experiment II). In Experiment I, plants were harvested at 30, 60, 90 and 120 days of growth; in Experiment II, three cuttings were carried out at every 30 days, and the plants were harvested four weeks after the previous one. In Experiment I, the populations did not differ for morphological development, showing a linear increase in height and tiller number, and a quadratic trend for root and shoot dry matter (DM). At 120 days of growth, plants... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cutting height; Phenological stage; Root; Stubble. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200008 |
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| Garcez,Tiago Barreto; Megda,Marcio Mahmoud; Artur,Adriana Guirado; Monteiro,Francisco Antonio. |
| The development of root system of forage grasses is influenced by the supply of mineral nutrients. The experiment was carried out in a greenhouse in Piracicaba, São Paulo State, with the objective of evaluating the effect of nitrogen and magnesium rates on dry mass yield, total length and surface, specific length and surface, and concentrations of nitrogen, magnesium, calcium and potassium in the root system of Brachiaria brizantha Stapf. cv. Marandu. It was studied five rates of nitrogen (2, 9, 16, 23 and 30 mmol L-1) and five rates of magnesium (0.05, 0.70, 1.35, 2.00 and 2.65 mmol L-1) in nutrient solutions in an incomplete 5² factorial arrangement, which resulted in the following combinations: 2/0.05; 2/1.35; 2/2.65; 9/0.70; 9/2.00; 16/0.05; 16/1.35;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria brizantha; Nutrient; Nutrient solution; Root; Root length; Root surface. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700005 |
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| MARTÍNEZ-TRUJILLO,MIGUEL; SOLÍS-GUZMÁN,GLORIA; JIMÉNEZ-SARAGOZ,JUAN CARLOS; LÓPEZ-HERNÁNDEZ,DOMINGO; CARREÓN-ABUD,YAZMÍN; RÍOS-CHÁVEZ,PATRICIA. |
| The growth response of roots to stress conditions is a strategy that allows the plant to either avoid the adverse conditions or to adapt to them. H an activities have resulted in the accumulation of some metals from certain concentrations have an adverse effect on plant growth. Among these, Chromiumumm (Cr) is a serious pollution caused by metal processing industries and leather tanning. To understand in detail the response of roots Cr(VI) stress, it was used an in vitro system with Arabidopsis thaliana utilizing three experimental conditions. (A) Plants germinated and grown for 6 days, without lateral roots, were transferred to media with different concentrations of Cr(VI). This allowed the evaluation as affecting the growth of the primary root to move... |
| Tipo: Journal article |
Palavras-chave: Chromiumum; Development; Plant; Root. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000200009 |
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| Santos,Paulo Ricardo dos; Viana,Alexandre Pio; Gomes,Vicente Martins; Preisigke,Sandra da Costa; Almeida,Odimar Ferreira de; Santos,Eileen Azevedo; Rodrigues,Daniele Lima; Rodrigues,Rosana; Walker,Michael Andrew. |
| ABSTRACT: Genetically diverse interspecific hybrids of Vitis were selected for resistance to Pratylenchus brachyurus. Three segregating populations with 57 hybrid crosses were evaluated. The parents included Vitis romanetiiC166-043 × 07355-075, 06354-047 × Cereza and 06354-047 × Nocera, selected from the germplasm bank at the University of California, Davis, the United States. The experiment was arranged in a randomized block design, with three replications and three plants per plot. Root mass, nematodes per gram of root and reproduction factor were determined and used as quantitative variables; 16 multi categoric descriptors were also evaluated. The traits were analyzed using the Ward-Modified Location Model procedure (Ward-MLM) for the composition of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis genotypes; Nematode; Root; Genetic variability. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001500424 |
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| Pace,Marcelo Rodrigo; Botânico,Marli Pereira; Angyalossy,Veronica. |
| Vessel elements in Monocotyledons present morphological differences according to the organ where they occur. Usually such diff erences have been explained from an evolutionary perspective, with few data on how the vessel elements could be infl uenced by the diff erent functions of organs and the growth habits of the plants. To address this question, three vegetative organs of palms of the same genus, Syagrus, growing in similar environments, but with different habits, were analyzed. Accordingly, we aimed to detect whether the vessel elements would present similar features in all species or whether the vessel elements would change according to their different habits. We found that the width and type of perforation plates varied in the same way among all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Monocotyledons; Tracheary elements; Vegetative organs; Growth habit; Root; Stem; Leaf. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000200007 |
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| Lopes, Willian Adriano Lira; Souza, Luiz Antonio de. |
| Serjania communis Cambess. (Sapindaceae) is a plant with climbing habit and occurs relatively often in Paraná State, Brazil. The fruits were collected at the 'Parque dos Pioneiros' a remnant of subtropical forest in Maringá, Paraná State, Brazil. The seedlings obtained in the greenhouse were described according to traditional techniques in plant morphology. Seedlings were embedded in historesin and sectioned in rotation microtome. The fruit is the samaroid type, the seeds have about 3 mm in length and brown color. Seedlings are epigeal phanerocotylar. The seedlings have a hairy hypocotyl, foliaceous cotyledons, reduced epicotyl, and two opposite eophylls. The root is diarch, the hypocotyl shows root-stem transition structure, stem epicotyl, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Root; Hypocotyl; Cotyledon; Epicotyl; Eophyll. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/27484 |
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| Marques, Angela Maria Marques Sanches; Universidade Estadual de Maringá; Moscheta, Ismar Sebastião; Universidade Estadual de Maringá. |
| The upper Paraná River floodplain is characterized by the existence of several aquatic and transitional habitats between the aquatic and terrestrial environment, influencing the presence and distribution of aquatic macrophytes. Samples were taken from different places and permanent slides were prepared for analysis and capture of images with the objective of comparing the anatomy of the roots of eight species of emergent aquatic macrophytes. The species feature uniseriate epidermis with narrow and long cells, cortex composed of uniseriate or biseriate exodermis, with or without thickening, aerenchyma with great gaps, uniseriate endodermis, with or without thickening, continuous or interrupted pericycle, and central cylinder with variable number of xylem... |
| Tipo: Estudo anatômico |
Palavras-chave: 2.03.00.00-0; 2.03.02.03-7 Aerenchyma; Root; Alismataceae; Cyperaceae; Polygonaceae; Pontederiaceae Anatomia Vegetal Aerenchyma; Root; Alismataceae; Cyperaceae; Polygonaceae; Pontederiaceae. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5509 |
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| PINHEIRO,CARLOS G.; OLIVEIRA,JOÃO MARCELO S. DE; HEINZMANN,BERTA M.. |
| Abstract The aim of this study was to describe the structural characterization of Hesperozygis ringens (Benth.) Epling vegetative organs. For this purpose, leaves, stems and roots of the endangered Lamiaceae were collected from a population located in Santo Antão, Santa Maria municipality, Rio Grande do Sul, Brazil. Results demonstrated that the H. ringens leaf blade presents glandular and non-glandular trichomes as well as two morphs of diallelocytic stomata, which are usually found above the epidermis level. The petiole is concave on ventral face and convex on its dorsal face, containing glandular and non-glandular trichomes as well as stomata in the epidermis. These types of trichomes were also detected in the stem. In addition, the presence of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lamiaceae; Leaf blade; Petiole; Root; Stem. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000602887 |
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| Registros recuperados: 48 | |
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