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A modified Yoshida medium to study rice-Herbaspirillum seropedicae interaction International Rice Research Institute
Flamiano, Remedios S..
xii, 93 l. : ill. Thesis (M.S.) -- University of the Philippines, Diliman
Tipo: Thesis Palavras-chave: Rice; Cultural media; Herbaspirillum seropedicae; Roots; Inoculations; Seedling growth.
Ano: 2002 URL: http://hdl.handle.net/123456789/440
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Conditions for the germination and the early growth of seedlings of Polaskia chichipe (Goss.) Backeberg and Echinocactus platyacanthus Link and Otto fa. grandis (Rose) Bravo-Hollis (Cactaceae): (with 2 tables & 2 figures) Phyton
Rosas-López,Ulises; Collazo-Ortega,Margarita.
The effect of different combinations of chemical scarification, soaking and substrates (ex vitro and in vitro) on seed germination ofPolaskia chichipe (Goss.) Backeberg and Echinocactus platyacanthus Link & Otto fa. grandis (Rose) Bravo-Hollis, collected in the Tehuacan Valley, Mexico, were studied. The P chichipe seeds did not require either chemical scarification or soaking, whereas E platyacanthus required chemical scarification with strong acids. Growth and maintenance of the seedlings was evaluated in two different concentrations of Murashige-Skoog medium (50% and 100% of their components). It was found that MS 50% stimulated germination in both species and promoted seedling growth.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Polaskia chichipe; Echinocactus platyacanthus; Cacti; Seed germination; Establishment; Seedling growth.
Ano: 2004 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100026
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Differential suppression of rice weeds by allelopathic plant aqueous extracts Planta Daninha
Khaliq,A; Matloob,A; Khan,M.B; Tanveer,A.
Herbicidal potential of different plant aqueous extracts was evaluated against early seedling growth of rice weeds in pot studies. Plant aqueous extracts of sorghum (Sorghum bicolor), sunflower (Helianthus annuus), brassica (Brassica compestris), mulberry (Morris alba), eucalyptus (Eucalyptus camaldunensis), and winter cherry (Withania somnifera) at a spray volume of 18 L ha-1 each at the 2-4 leaf stage of rice weeds viz horse purslane (Trianthema portulacastrum) [broad-leaf], jungle rice (Echinochloa colona), and E. crus-galli (barnyard grass) [grasses] and purple nut sedge (Cyperus rotundus) and rice flat sedge (C. iria) [sedges]. The results showed significant interactive effects between plant aqueous extracts and the tested weed species for seedling...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Aqueous extracts; Seedling growth; Weeds; Inhibition.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000100003
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Efecto de los sustratos en el cultivo del tomate (Lycopersicon esculentum Mill) bajo condiciones de invernadero. Colegio de Postgraduados
Ortega Martínez, Luis Daniel.
El tomate en el municipio de Chignahuapan Puebla, es el principal cultivo producido bajo condiciones de invernadero, los sistemas de producción de esta hortaliza se han ido diversificando con el fin de incrementar el rendimiento, incorporando tecnologías novedosas como cubiertas plásticas, riego por goteo e hidroponía. Uno de los principales factores que determinan el éxito del cultivo es el sustrato pues constituye el medio en que se desarrollaran las raíces las cuales tienen gran influencia en el crecimiento y desarrollo. En este trabajo se evaluó el efecto de los sustratos aserrín, composta, tierra agrícola, tezontle así como la mezcla entre ellos a un volumen de 1:1 en la producción de plántulas y en el crecimiento y desarrollo del tomate bajo...
Palavras-chave: Lycopersicon esculentum Mill; Sustrato; Plántulas; Crecimiento; Desarrollo; Substrate; Seedling growth; Development; Maestría; EDAR; Desarrollo Agrícola Regional.
Ano: 2010 URL: http://hdl.handle.net/10521/70
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Efecto de los sustratos en el cultivo del tomate (Lycopersicon esculentum Mill) bajo condiciones de invernadero. Colegio de Postgraduados
Ortega Martínez, Luis Daniel.
El tomate en el municipio de Chignahuapan Puebla, es el principal cultivo producido bajo condiciones de invernadero, los sistemas de producción de esta hortaliza se han ido diversificando con el fin de incrementar el rendimiento, incorporando tecnologías novedosas como cubiertas plásticas, riego por goteo e hidroponía. Uno de los principales factores que determinan el éxito del cultivo es el sustrato pues constituye el medio en que se desarrollaran las raíces las cuales tienen gran influencia en el crecimiento y desarrollo. En este trabajo se evaluó el efecto de los sustratos aserrín, composta, tierra agrícola, tezontle así como la mezcla entre ellos a un volumen de 1:1 en la producción de plántulas y en el crecimiento y desarrollo del tomate bajo...
Palavras-chave: Lycopersicon esculentum Mill; Sustrato; Plántulas; Crecimiento; Desarrollo; Substrate; Seedling growth; Development; Maestría; EDAR; Desarrollo Agrícola Regional.
Ano: 2010 URL: http://hdl.handle.net/10521/70
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Effect of atmospheric CO2 enrichment on the establishment of seedlings of Jatobá, Hymenaea Courbaril L. (Leguminosae, Caesalpinioideae) Biota Neotropica
Aidar,M.P.M.; Martinez,C.A.; Costa,A.C.; Costa,P.M.F.; Dietrich,S.M.C.; Buckeridge,M.S..
Plants grown in elevated CO2 environments may exhibit photosynthetic acclimation or down regulation, which is characterised by reduced rates of photosynthesis. In most cases of CO2-induced photosynthetic acclimation, the reduced rates of photosynthesis were still higher than those detected in plants growing at ambient CO2 concentrations. In this work we present a study on the behaviour of seedlings of Hymenaea courbaril, a late secondary/climax species that is one of the most important trees in mature tropical forests of the Americas. After germination, the seedling of H. courbaril increases its rate of growth due to the mobilisation of massive amounts of a storage cell wall polysaccharide (xyloglucan) from its cotyledons. In our experiments, germinated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Photosynthesis; CO2 enrichment; Hymenaea courbaril; Storage mobilisation; Root:shoot ratio; Seedling growth; Cotyledons; Open top chamber; Xyloglucan; Biodiversity.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032002000100008
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Effect of light and temperature on germination and early growth of Vochysia tucanorum Mart., Vochysiaceae, in cerrado and forest soil under different radiation levels Rev. Bras. Bot.
BARBOSA,ANDRÉA RODRIGUES; YAMAMOTO,KIKYO; VALIO,IVANY F. M..
Vochysia tucanorum Mart. (Vochysiaceae) is a very widely distributed species in the cerrado and forests in Brazil, from the State of Bahia to Paraná. Its seed germination was analysed under eight treatments using different conditions of light and temperature. Up to 73 days, at least ca. 93% of the seeds germinated in all treatments, except under alternating temperatures of 35°/10°C (62%). Light enhanced germination, except under constant temperature of 25°C when seeds are not photoblastic. At this temperature, the highest percentage of germination was found. Initial vegetative growth was analysed by comparing the effects of shading, by means of different percentages of full daylight (100%, 45%, 10.6%, 4.8%), and soils from cerrado and forest. During 123...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Germination; Seedling growth; Shading; Vochysia tucanorum; Soil; Cerrado.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000500008
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Effect of nursery seeding date and phosphorus fertilization on rice seedling growth International Rice Research Institute
Kumar, K. A.; Reddy, M. D..
p.50-52
Palavras-chave: Seedlings; Seedling growth; Seed germination; Sowing date; Phosphorus fertilizers; Application rates; Dry matter; Earliness; Plant height; Leaves; Plumules; Roots; Shoots.
Ano: 2003 URL: http://hdl.handle.net/123456789/1262
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Effect of osmopriming on germination and initial growth of Physalis angulata L. under salt stress and on expression of associated genes Anais da ABC (AABC)
SOUZA,MANUELA O. DE; PELACANI,CLAUDINÉIA R.; WILLEMS,LEO A.J.; CASTRO,RENATO D. DE; HILHORST,HENK W.M.; LIGTERINK,WILCO.
ABSTRACT This study aimed to evaluate the effects of priming on seed germination under salt stress and gene expression in seeds and seedlings of P. angulata L. After priming for 10 days, seed germination was tested in plastic trays containing 15 ml of water (0 dS m-1 - control) or 15 ml of NaCl solution (2, 4, 6, 8, 10, 12, 14 and 16 dS m-1). Fresh and dry weight of shoots and roots of seedlings were evaluated at 0, 2, 4, 6, 8 dS m-1. Total RNA was extracted from whole seeds and seedlings followed by RT-qPCR. The target genes selected for this study were: ascorbate peroxidase (APX), glutathione-S-transferase (GST), thioredoxin (TXN), high affinity potassium transporter protein 1 (HAK1) and salt overly sensitive 1 (SOS1). At an electroconductivity of 14 dS...
Tipo: Info:eu-repo/semantics/article Palavras-chave: RT-qPCR; Germinability; Seedling growth; Salinity.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200503
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Effects of salinity on seed germination, seedling growth and survival of Spartina ciliata Brong Acta Botanica
Cordazzo,César Vieira.
The effects of different salinities on the germination of Spartina ciliata seeds were tested during 40 days in the laboratory, using six concentrations of NaCl (0,45, 80, 130, 170 and 215 mM) besides three concentrations of seawater (25,30 and 35‰). In addition, the survival and growth of seedlings were tested in five constant salinity regimes (0,45, 80 and 170 mM NaCl) as well as in five regimes of simulating seawater overwash. The results showed that seeds possed a high germination capacity over a wide range of salinities (0 to 215 mM NaCl). Although concentrations close to full-strength seawater completely inhibited seed germination, the transfer of the ungerminated seeds to freshwater immediately stimulated this. The effects of salinity on seedling...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Salinity stress; Seed germination; Seedling growth; Coastal dune plant; Spartina ciliata.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061999000300012
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Exploring Herbicidal Potential of Aqueous Extracts of Some Herbaceous Plants Against Parthenium Weed Planta Daninha
SAFDAR,M.E.; TANVEER,A.; KHALIQ,A.; ALI,H.H.; BURGOS,N.R..
To assess the phytotoxic potential of Achyranthes aspera, Alternanthera philoxeroides, Datura metel and Rumex dentatus against Parthenium hysterophorus, 5% (w/v on dry weight basis) aqueous extracts from root, stem, leaf, flower and whole plant were tested through a Petri plate-based germination and pot-cultured seedling bioassays. Achyranthes aspera and A. philoxeroides inhibited parthenium weed germination more than extracts from other species. Whole plant, leaf and fruit extracts of A. aspera reduced the germination percentage (5%); leaf extract from A. philoxeroides caused lower germination index (0.4), higher mean germination time (14 d) and longer time to 50% germination (13.5 d) of parthenium weed. In the foliar spray bioassay, A. aspera reduced...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Bio-herbicides; Parthenium weed; Seed germination; Seedling growth; Weed management.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100109
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Germination and morphological characterization of the fruits, seeds, and seedlings of Pilosocereus gounellei Rev. Bras. Bot.
Abud,Haynna Fernandes; Gonçalves,Nayara Roberto; Pereira,Magnum de Sousa; Pereira,Diego de Sousa; Reis,Rodrigo de Góes Esperon; Bezerra,Antonio Marcos Esmeraldo.
The present work examined the germination and morphology of the fruits and seeds of the cactus Pilosocereus gounellei (xique-xique) and describeb the different stages of seedling growth. Germination tests examined the effects of combinations of two illumination regimes (a 12 hour photoperiod and total darkness) and three temperature regimes (25, 30, and 20-30 ºC) on the seeds of this species. Germination counts were made daily until the 16th day after sowing and the germination percentage and velocity index, and average germination time were evaluated. Descriptions of seed morphology considered both their external and internal aspects. The processes of germination and seedling growth were evaluated during 150 days and eight developmental stages were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cactaceae; Morphology; Seedling growth.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000100003
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Germination, initial growth, and biomass allocation in three native Cerrado species Rev. Bras. Bot.
Saboya,Pablo; Borghetti,Fabian.
The parameters of germination, initial growth, and biomass allocation of three native plant species of Cerrado (Copaifera langsdorffii, Dipteryx alata and Kielmeyera coriacea) were established. The species had germination percentages above 88% and average germination times longer than 139 hours. The average time for the opening of the first leaf pair was more than 538 hours for all three species. The average root length of C. langsdorffii and D. alata seedlings after 80 days of growth was around 40cm, four times larger than the average shoot length (<10cm), although the root and shoot biomasses were similar for both species. The average root length (&gt;20cm) of K. coriacea seedlings was four times larger than the average shoot length (<5cm), and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomass partitioning; Copaifera langsdorffii; Dipteryx alata; Kielmeyera coriacea; Seedling growth.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000200002
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Green soybean seeds: effect on physiological quality Ciência Rural
Teixeira,Sheila Bigolin; Silva,Joseano Graciliano da; Meneguzzo,Michele Renata Revers; Martins,Andrea Bicca Noguez; Meneghello,Geri Eduardo; Tunes,Lilian Vanussa Madruga de.
ABSTRACT: The objective of this research was to assess the manner in which the presence of green soybean seeds affects their physiological quality. In this study, six lots of soybean seeds of cultivar 5958RSF IPRO with 0, 0, 7, 8, 16 and 18% of green seeds were examined. The tests done included the first germination count, germination, electrical conductivity, field emergence, accelerated aging, emergence speed index, Tetrazolium, length, dry mass and seedling growth curve. Results were tested employing the normality test and analysis of variance, and the means were compared by the Tukey test at 5% probability level, employing the Rbio statistical program. Growth data were analyzed by the nonlinear regression analytical method, using the SigmaPlot 12.0...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Abiotic stress; Decay; Seedling growth; Glycine max.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200201
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Influence of high- and low-temperature treatments on seed germination and seedling vigor of coarse and fine rice International Rice Research Institute
Farooq, M.; Basra, S. M. A.; Hafeez, K.; Warriach, E. A..
p.75-77
Palavras-chave: Temperature; Seed treatment; Seed germination; Seedling growth; Seeds; Vigour.
Ano: 2004 URL: http://hdl.handle.net/123456789/1050
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Light intensity and type of container on producing Cassia grandis L. f. seedlings AGRIAMBI
Leal,Caio C. P.; Torres,Salvador B.; Freitas,Rômulo M. O. de; Nogueira,Narjara W.; Farias,Raul M. de.
ABSTRACTThis study aimed to determine the effects of the luminosity and type of container on producing Cassia grandis seedlings. Thus, in a substrate composed by topsoil + wood powder (1:1) the seedlings were grown into plastic tubets containing 0.3 dm3 of such substrate, or into plastic pots containing 1.0 dm3 of the same substrate, and subjected to 50 and 25% shading or full sunlight. The assessments were performed every two weeks by measuring plant height and stem diameter, during eight weeks period. At the end of this period, the leaf area, dry mass of shoots and roots, the ratio between height of plant/diameter of stem, and the Dickson quality index were also assessed. The experiment was carried out in a completely randomized design with treatments...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pink shower cassia; Forest species; Forest species seeds; Seedling growth; Shading.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001000939
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Nursery technology for early production of robust rice seedlings to transplant under integrated crop management International Rice Research Institute
Rajendran, R.; Balasubramanian, V.; Ravi, V.; Valliappan, K.; Jayaraj, T.; Ramanathan, S..
p.73-75
Palavras-chave: Crop management; Transplanting; Nurseries; Seedling growth.
Ano: 2004 URL: http://hdl.handle.net/123456789/1049
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PHENOLICS IN TWO Alternanthera SPECIES RESIDUES AFFECT THE GERMINATION AND EARLY SEEDLING GROWTH OF RICE (Oryza sativa) Planta Daninha
MEHMOOD,A.; TANVEER,A.; NADEEM,M.A.; MAQBOOL,R.; ALI,H.H..
ABSTRACT Alternanthera species are invasive aquatic/semi-aquatic weeds posing a serious threat to agro-biodiversity in several countries in the world. The present study was conducted to assess the phytotoxic effects of Alternanthera philoxeroides and A. sessilis residues on emergence and early seedling growth traits of rice (Oryza sativa). Soil was prepared with 4% (w/w) Alternanthera species residues separately and allowed to decay for 0, 15 and 30 days. Rice emergence was significantly decreased but increase in mean emergence time and time to 50% emergence was observed in soils modified with Alternanthera species residues compared with seed sown in unmodified soils. Rice emergence was reduced to 50-67% and 52-75% by A. sessilis and A. philoxeroides,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Alternanthera; Rice; Seedling growth; Decomposition periods.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100259
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Phytotoxic Activity of Parthenium Against Wheat and Canola Differ With Plant Parts and Bioassays Techniques Planta Daninha
KHALIQ,A.; ASLAM,F; MATLOOB,A; JAVAID,A; TANVEER,A; HUSSAIN,S.; IHSAN,M.Z.
Phytotoxic effects of invasive weed Parthenium hysterophorus were studied by using whole plant, leaf and root aqueous extracts at 0, 2.5, 5.0, 7.5 and 10% (w/v) concentrations against germination and early seedling growth of wheat and canola. Studies were carried out both in Petri plates with filter paper as substratum placed in controlled conditions and soil-filled plastic pots placed in open environments. Pronounced variation was noted for phytotoxic activity of different plant parts of parthenium, aqueous extract concentrations, test species, and bioassay techniques. Aqueous parthenium extracts either inhibited or delayed the germination and suppressed seedling growth of test species over control. For both test species, all the germination attributes...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathic inhibition; Aqueous extracts; Bioassay techniques; Germination dynamics; Parthenium; Phenolics; Seedling growth.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100011
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Production and quality of Anacardium othonianum Rizz. seedlings grown in different substrates Rev. Bras. Frutic.
Dornelles,Paulo; Silva,Fabiano Guimarães; Mota,Clenilso Sehnen; Santana,João das Graças.
This study aimed to evaluate the effect of substrate on growth, emergence, nutrition, and quality of Anacardium othonianum Rizz. (cerrado cashew tree) seedlings. The experiment was conducted in a greenhouse at the Plant Tissue Culture Laboratory on the Rio Verde campus. The following substrates were used: 1) Bioplant®, 2) Mecplant® (MP) + carbonized rice husk (CRH) (7:3), 3) fine-grained vermiculite (FGV), 4) FGV+CRH (3:1), 5) FGV+CRH (1:1), 6) FGV+CRH (1:3), and 7) sugarcane bagasse (SB) + sugarcane mill filter cake (FC) (3:2). Emerged seedlings were counted at 2-day intervals for 38 days following emergence of the first seedling. At 39, 64, and 89 days after seeding (DAS), the following variables were measured: stem length (SL), stem diameter (SD), and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado cashew tree; Seedling growth; Seedling nutrition; Substrates.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452014000200026
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