Consulta: subjectFacets:"Seedling emergence"
Registros recuperados: 15
Data/hora: 16/06/2024 08:12:16

Casuarina equisetifolia fitorremeciación de suelo contaminado con diesel y aplicación de bioestimulación y bioaumentación.
Provedor de dados: 32
Autores: Díaz Martínez, María Esther.
En este trabajo se evaluó la germinación de semillas y el crecimiento de plantas de C. equisetifolia L. ante diesel, y su potencial de fitorremediación en combinación de bioaumentación y bioestimulación. La primera fase experimental evaluó el efecto tóxico de 15 dosis de diesel (0, 100, 250, 500, 800, 1000, 1500, 2000, 2500, 3000, 5000, 7500, 10000, 15000 y 20000 mg kg-1) en la germinación de semillas y la emergencia de plántulas. A los 10 días, la germinación fue mayor en concentraciones altas de diesel; la mayor geminación ocurrió en 20000 mg kg-1, y la menor se registró ante 5000 mg kg-1. La emergencia de plántulas fue mayor en las concentraciones menores a 5000 mg kg-1. A los 15 días, el crecimiento de las plántulas disminuyó ante concentraciones...
Palavras-chave: Germinación; Emergencia de plantas; Simbiosis; Fertilización; Microorganismos; Degradación de hidrocarburos; Seed germination; Seedling emergence; Symbiosis; Fertilization; Microorganisms; Hydrocarbon degradation; Maestría; Edafología.
Ano: 2012
URL: http://hdl.handle.net/10521/730

Association between biometric characteristics of tomato seeds and seedling growth and development
Provedor de dados: 69
Autores: Peñaloza,Patricia; Durán,José María.
Background The size and weight of tomato seeds depend on genetics and can be modified by environment and management. In some species, a strong relation has been described between physical aspects of the seeds and the quality of the corresponding seedlings, but this cannot be considered a general rule. The objective of this research was to identify any association between the biometric characteristics of tomato seeds and the growth and development of their seedlings. Results A total of 18 lots of hybrid tomato seeds were used (from indeterminate plants with round fruits), belonging to six varieties from two reproduction seasons. Each lot was evaluated for seed size and weight, and seed quality, in terms of the germination test (5 and 14 d after sowing). The...
Tipo: Journal article
Palavras-chave: Seed size; Seed weight; Seedling emergence; Seedling length; Seedlings dry weight; Solanum lycopersicum L.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000400002

Weed seed transport and weed establishment as affected by polyacrylamide in furrow-irrigated corn
Provedor de dados: 18
Autores: Sojka, R.E.; Morishita, D.W.; Foerster, J.A.; Wille, M.J.
Tipo: Article
Palavras-chave: Corn / maize; Weed seeds; Seedling emergence; Mass Import - autoclassified (may be erroneous).
Ano: 2003
URL: http://eprints.nwisrl.ars.usda.gov/169/1/1112.pdf

PAM Spray effects on sugarbeet emergence
Provedor de dados: 18
Autores: Lehrsch, G.A.; Kincaid, D.C.; Lentz, R.D.
Tipo: Technical Bulletin
Palavras-chave: Sugarbeet; Seedling emergence; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/1191/1/911.pdf

Seed priming and sulfur effects on soybean cell membrane stability and yield in saline soil
Provedor de dados: 86
Autores: Bejandi,Teymur Khandan; Sedghi,Mohammad; Sharifi,Raouf Seyed; Namvar,Ali; Molaei,Peyman.
The objective of this work was to determine the effects of seed priming and sulfur application on cell membrane characteristics, seedling emergence, chlorophyll content and grain yield of soybean (Glycine max) in saline soil. A complete-block design in 4x3 factorial arrangement with three replicates was used to test four types of seed priming (water, auxin, gibberellin and non-priming) and three levels of sulfate availability (0, 70 and 140 kg ha-1 K2SO4). The soil had a silty loam texture with an electrical conductivity of 3.61 ds m-1, a pH of 8.2 and a saturation percentage of about 46%. Seed priming had significant effects on mean emergence rate (MER), emergence percentage, relative water content (RWC) of leaves, relative chlorophyll content, time of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Chlorophyll content; Environmental stress; Injury index; Seedling emergence.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000900007

Germination ecology of Rhynchosia capitata: an emerging summer weed in Asia
Provedor de dados: 87
Autores: Ali,H.H.; Tanveer,A.; Nadeem,M.A.; Asghar,H.N.; Javaid,M.M.
Rhynchosia capitata is becoming an increasing problem in summer crops, such as cotton, soybean, pearl millet and mungbean in many Asian countries. Laboratory and greenhouse studies have been conducted to determine the effects of several environmental factors on seed germination patterns and seedling emergence of R. capitata. We investigated whether the diverse ecological factors such as temperature, light, salinity, moisture stress, pH, and soil depth affected germination and seedling emergence of R. capitata. Germination increased as temperature increased from 25ºC and significantly reduced at 45ºC. Presence or absence of light did not influence germination. Germination of R. capitata was sensitive to increased salt and moisture stress, as well as to seed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Moisture stress; PH; Salinity; Seedling emergence; Burial depth.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000200002

Germination ecology of wild onion: a rainfed crop weed
Provedor de dados: 87
Autores: Tanveer,A.; Sibtain,M.; Javaid,M.M.; Ali,H.H.
Asphodelus tenuifolius is becoming a more common weed in rain-fed area in Pakistan. Laboratory and greenhouse experiments were conducted to determine the effect of different environmental factors on germination and emergence of A.tenuifolius. Results showed that A.tenuifolius can tolerate a wide range of varying environmental factors. Greatest percentage of germination (80%) was recorded at 15 ºC constant temperature; however, considerable germination occurred at 20 and 25 ºC. Light for 10 h photoperiod stimulate germination of Asphodelus tenuifolius compared with complete darkness. Germination was totally inhibited at osmotic stress higher than -0.8 MPa. There was no significant difference in germination at pH 6 to 8; however, there was a slightly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asphodelus tenuifolius; Temperature; Water stress; Salt stress; PH; Seedling emergence; Seeding depth.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000100008

The potential of natural regeneration of rocky outcrop vegetation on rupestrian field soils in "Serra do Cipó", Brazil
Provedor de dados: 88
Autores: Medina,Branca Maria Opazo; Fernandes,Geraldo Wilson.
An area's innate potential to regenerate represents a crucial factor for its conservation and management. The seed rain and seed bank are important agents in the regeneration process. Seed banks are particularly important in communities where there is a high proportion of obligate seeders. Rocky outcrops are habitats where most part of the plant species depends on their seeds to reproduce and maintain viable populations. Therefore, seed banks ought to be important in this vegetation physiognomy. We test the hypotheses that the seed bank of the rocky outcrops found in the rupestrian fields of "Serra do Cipó", Brazil, is richer in species and denser than those formed on different vegetation physiognomies neighboring the outcrops. We then compared species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Natural regeneration; Rocky outcrops; Seed bank; Seedling emergence; "Serra do Cipó".
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000400011

Vigor and field emergence in "high oleic" sunflower seeds, in southeast of Buenos Aires province
Provedor de dados: 95
Autores: Murcia,Mónica; Peretti,Anna; San Martino,Silvina; Pérez,Alejandra; del Longo,Olga; Argüello,Juan; Pereyra,Victor.
Sunflower crop was based, as yet, on high linoleic cultivars, but in the last years request for oil with higher content of oleic acid has increased, due to their dietary characteristics. At the beginning, high oleic cultivars were used to be sown in warm regions, but then the concern about growing it in temperate areas, as the south-east of Buenos Aires Province, was posed. In this region, early sowings are recommended, so that grain filling matches with a period of appropriate hydric and light conditions, as to result in greater yields. However, early sowings are limited by low soil temperature, that delays seedling emergence, resulting in heterogeneous stand establishment. The aim of this work was to evaluate seed performance of four high oleic cultivars...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigor; Sunflower; "high oleic"; Early sowing; Seedling emergence.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222002000100018

Primed carrot seeds performance under water and temperature stress
Provedor de dados: 63
Autores: Pereira,Márcio Dias; Dias,Denise Cunha Fernandes dos Santos; Dias,Luiz Antônio dos Santos; Araújo,Eduardo Fontes.
Uniformity and percentage of seedling emergence of direct-seeded vegetables have a major impact on their yield and quality. Depending on temperature and soil water potential, carrot seeds performance in the field is poor justifying the use of techniques to accelerate the germination and seedling emergence. The objective of this work was to evaluate the effects of priming treatments, with and without aeration, on carrot seeds performance under water and temperature stress. Two seed lots of carrots, Brasília cultivar, were primed in PEG 6000 -1.0 and -1.2 MPa solutions, for four and eight days, at 20ºC, using two imbibition methods: priming in paper towel moistened with the respective solutions and immersion into aerated osmotic solutions. Non-primed seeds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Daucus carota L.; Priming; Seedling emergence; Vigor.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200005

Seed bank composition in a secondary forest in the Lower Delta of the Paraná River (Argentina)
Provedor de dados: 39
Autores: Kalesnik,Fábio; Sirolli,Horacio; Collantes,Marta.
The native forests once occupying the coastal levees of the Lower Delta islands of the Paraná River (in Argentina) have been replaced by commercial forests. Many of those forests have been abandoned, resulting in secondary forest formation that is subject to numerous invasive exotic species. A priori observations suggest that successional trends do not lead to recovery of the original forest. The aim of the present study was to analyze the role of invasive exotic species in these environments and the likelihood of recovery of the original forest cover. Therefore, we examined the composition of the seed bank and of the standing vegetation, as well as the population structure of tree species. Secondary forests are described as being in an intermediate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chinese privet (Ligustrum sinense); Invasive species; Post-abandonment regeneration; Riparian forest; Seedling emergence.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100006

Aspectos biométricos de frutos e sementes, grau de umidade e superação de dormência de jatobá - DOI: 10.4025/actasciagron.v32i2.3681
Provedor de dados: 1
Autores: Andrade, Leonaldo Alves de; Universidade Federal da Paraíba; Bruno, Riselane de Lucena Alcântara; Universidade Federal da Paraíba; Oliveira, Lamartine Soares Bezerra de; Universidade Federal da Paraíba; Silva, Hipólito Tadeu Ferreira da; Centro Federal de Educação Tecnológica de Rio Verde.
Este trabalho objetivou caracterizar biometricamente sementes e frutos de Hymenaea courbaril L. e determinar o grau de umidade, bem como avaliar diferentes tratamentos de superação de dormência. Foram determinados a biometria, a massa de frutos e sementes e o número de sementes por fruto. As sementes foram submetidas aos seguintes cortes: 1-testemunha, sem escarificação ou corte; 2-escarificação em três faces; 3-corte ao meio e 4-corte em quatro partes. Avaliou-se também o percentual de emergência, o IVE, o comprimento da parte aérea e da raiz de plântulas. Para isso, as sementes foram submetidas à superação de dormência, com e sem embebição em água, pelos seguintes tratamentos: I-escarificação do lado oposto ao hilo; II-escarificação em uma lateral;...
Palavras-chave: 5.02.01.04-2 Hymenaea courbaril; Espécie florestal; Emergência de plântulas Sementes Florestais Hymenaea courbaril; Forestry species; Seedling emergence.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3681

Heterosis and combining ability of seed physiological quality traits of single cross vs. three-way sorghum hybrids
Provedor de dados: 1
Autores: Galicia-Juárez, Marisol; Mendoza-Onofre, Leopoldo Ernesto; González-Hernández, Víctor Arturo; Cisneros-López, María Eugenia; Benítez-Riquelme, Ignacio; Córdova-Téllez, Leobigildo.
The aim of this research was to compare genetic parameters for traits related with seed germination and seedling vigour of single cross (SCH) vs. three-way (TWH) sorghum hybrids. The study was conducted in a sand bed under a greenhouse; 67 genotypes (four pairs of A- and B- lines, four R- lines, 13 SCH and 42 TWH) were allocated in a randomized complete blocks experimental design with three replications. Statistical analysis included ANOVA’s and Student “t” tests, while Tukey test (p £ 0.05) was applied for mean comparisons. The R-lines showed better physiological seed quality attributes than the A- and B- lines. The seed quality and heterosis values of SCH vs. that of TWH did not show significant differences (p &gt; 0.05) for any variable; however,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorghum bicolor L. Moench; Maternal effects; Seedling emergence; Sorghum lines; Top-cross tests.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/31198

Influences of presowing treatments on the germination and emergence of fig seeds (Ficus carica L.) - doi: 10.4025/actasciagron.v34i3.13392
Provedor de dados: 1
Autores: Çalişkan, Oguzhan; Faculty of Agriculture, University of Mustafa Kemal; Mavi, Kazim; Faculty of Agriculture, University of Mustafa Kemal; Polat, Aytekin; Faculty of Agriculture, University of Mustafa Kemal.
Seed germination of fig seeds is important for obtain seedlings with high variability in breeding studies, and for producing mosaic virus-free seedlings. This experiment was carried out to evaluated the effects of several treatments (priming with water for 24h, GA3 at 500 and 1000 ppm for 24h, 3% KNO3 for 24h, and stratification at 4°C for 7, 14 and 21 days) on seed germination and emergence of ‘Bursa Siyahı’ and ‘Sarılop’ fig cultivars. The application of GA3 increased the germination and emergence of these fig seeds. The highest percentages of germination and emergence were obtained with GA3 at 500 or 1000 ppm for both cultivars. The seed germination and emergence of the cultivar ‘Bursa Siyahı’ were higher than observed with the ‘Sarılop’. The...
Tipo: Laboratory analysis
Palavras-chave: Ficus carica L.; Fig; Seed germination; Seedling emergence; Seed treatments seed germination and emergence Horticulture Ficus carica L.; Fig; Seed; Germination; Seedling emergence; Seed treatments seed germination and emergence.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/13392

Emergence and establishment of native and non-native species in soils of remnant and converted highland grasslands – southern Brazil
Provedor de dados: 49
Autores: Müller,Helena de Lima; Lopes,Rodrigo Ramos; Hermann,Julia-Maria.
Abstract Native grasslands in the Campos de Cima da Serra, Brazil, are being converted at speed for exotic tree plantations and cropland. The impact of modified and novel soil conditions on the establishment of native grassland species is unknown; establishment of non-native species, deliberately or accidentally introduced, could be favoured. In a common garden composed of fully randomized replicate samples of soils collected from remnant grassland, former cropland and pine plantations, we tested emergence and establishment of five cold-season species: Native low-tussock grass Piptochaetium montevidense (Spreng.) Parodi; native legume Trifolium riograndense Burkart; naturalized low-tussock grass Vulpia bromoides (L.) Gray; low-tussock grass Holcus lanatus...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Seedling emergence; Degraded soil; Native forage species; Invasive species.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000100502