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| Registros recuperados: 55 | |
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| Menezes,Luis Fernando Tavares de; Pugnaire,Francisco I.; Matallana,Gloria; Nettesheim,Felipe Cito; Carvalho,Daniel Costa de; Mattos,Eduardo Arcoverde de. |
| ABSTRACT Germination rate and establishment success of plants in harsh environments depend on the ability of seeds to withstand unfavorable environmental conditions and avoid predators. Brazilian coastal plains, known as restinga, are subject to environmental factors that seriously limit plant establishment and survival (e.g. salinity, desiccation, oligotrophy, flooding, high temperature and radiation levels). We tested, both in field and laboratory experiments, conditions for germination and establishment of Allagoptera arenaria, a palm tree often found in restinga ecosystems of southeastern Brazil, and which have a principal role in plant community dynamics. Our results showed that the absence of mesocarp, high radiation exposure, and temperature were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arecaceae; Facilitation; Resting; Secondary dispersion; Seedling. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100012 |
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| Rozane, Danilo Eduardo; UNESP; Prado, Renato de Mello; UNESP; Natale, William; UNESP; Beutler, Amauri Nelson; UNIPAMPA; Silva, Simone Rodrigues da; Esalq/USP; Barbosa, José Carlos; UNESP. |
| O estudo teve por objetivo avaliar componentes do crescimento e do estado nutricional de porta-enxertos de limoeiro cravo, em função de doses de nitrogênio, fósforo e potássio via fertirrigação. O delineamento experimental foi inteiramente casualizado, em esquema fatorial 33 + 1, sendo 3 fatores (nitrogênio, fósforo e potássio - NPK), em 3 doses e uma testemunha (sem adubação), com 3 repetições. A unidade experimental foi constituída pela média de dois porta-enxerto (Hipobioto) de limoeiro cravo (Citrus limonia L. Osbeck), cada qual situado em um tubete de 2,8 cm de diâmetro e 12,3 cm de altura, perfurados na base e preenchido substrato composto de casca de Pinus e vermiculita. As doses utilizadas foram constituídas por níveis de N (460; 920 e 1840 mg... |
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Palavras-chave: 5.01.00.00-9 Agronomia citros; Tubete; Citrus limonia L. Osbeck; Estado nutricional; Mudas citrus; Tubes; Citrus limonia L. Osbeck; Nutritional state; Seedling. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/7036 |
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| MARTINS,SHIRLEY; SCATENA,VERA L.. |
| The Cyperaceae species are present in different ecosystems and constitute the herbaceous extract. Of the approximately 5,500 species of the family; a third has Kranz anatomy, representing an important characteristic of the taxonomy and phylogeny of the group. In Cyperus laxus L. (non-Kranz) and Fimbristylis dichotoma Vahl (Kranz), development begins with germination that is marked by the emergence of the coleoptiles, followed by the primary root, which is ephemeral. The rhizome originates from the mesocotyl and it promotes the vascular connection between the roots, leaves and scapes. The continuity of the tissues is evidenced by the presence of an endodermis and pericycle in all vegetative organs. Leaves and scapes differ between the two species by the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pericycle; Endodermis; Casparian strips; Seedling. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200605 |
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| Resende,Júlio Carlos França; Klink,Carlos Augusto; Schiavini,Ivan. |
| Population dynamics and structure of young individuals of the tree Copaifera langsdorffii Desf. (Caesalpiniaceae) were studied in the gallery forest of the Panga Ecological Station, Uberlândia, MG, Brazil. Three distinct habitats were recognized in this forest, Dike, Middle and Edge zone. Four annual surveys of plant height, diameter at plant base and density were made between 1993 and 1996. The species showed an aggregated distribution in all three habitats. Population structure in all four surveys presented the typical reversed "J" form, characteristic of populations in local regeneration. For the whole population, mortality rates during the four years were constant and low (average of 4.8 % per year), while recruitment declined during the same period... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gallery forest; Seedling; Recruitment; Mortality; Growth; Saplings. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000300012 |
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| Ugur,Atnan; Maden,Hande Ayhan. |
| Sweet corn (Zea mays L. var. saccharata) attracts people with its amazing flavour. Adverse environmental factors decrease plant's cob yield and quality. A more effective production can be made by using resistant varieties and adjusting the sowing and plating periods. In this study, the effect of direct seed sowing and cultivating with seedlings in three different times (5, 15 and 25 May) on the sweet corn's cob yield and certain quality features have been investigated. In the research hybrid sweet corn varieties; 2201, Challenger, Merit, Sunshine and Yellow Baby were used. Ear weight, ear yield, ear length, ear diameter, sequence in ear, kernel numbers in the sequence, dry weight, TSS, chroma and hue values have been identified in the study. The values... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corncob; Growing season; Kernel; Seedling. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000100048 |
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| Ceccherini,Guilherme José; Lima,Tiago José Leme de; Sala,Fernando César. |
| ABSTRACT: Nowadays, an important economic movement is involved in the improvement of polyethylene trays for the production of seedlings, being developed with different volumes, numbers and cell formats in an each culture-specific manner. The objective of the present study was to evaluate the performance of curly lettuce originated from seedlings from trays with different volumes, through the comparison between conventional and hydroponic-NFT cultivation. Five volumes of trays (10, 20, 30, 40 and 50 cm³ of cell-1) were tested in conventional and hydroponic cultivation, from February to March 2016. For the purpose of comparison, the plants were evaluated through the characteristics of height, circumference, stem diameter, number of leaves, fresh shoot mass... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa L.; Seedling; Comparative; Field; Hydroponic.. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000100205 |
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| Elizalde Castillo, Violeta. |
| Las bromelias (Bromelia spp.) tienen valor ornamental mundialmente y su explotación comercial en México y América va en aumento; sin embargo, su diversidad está amenazada por la deforestación de bosques y selvas, por la extracción ilegal de especímenes, entre otras causas. El objetivo de este estudio es evaluar algunas condiciones que permitan obtener plantas a partir de semillas recolectadas de poblaciones naturales de Hechtia myriantha, H. perotensis, Tillandsia limbata, T. botterii y T. multicaulis. Se postula que existe una combinación adecuada de factores ambientales, que permiten que las semillas germinen adecuadamente y las plántulas tengan supervivencia estable. Se realizó la prueba de tetrazolio y germinación de semillas de H. perotensis; se... |
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Palavras-chave: Sobrevivencia; Germinación; Plántula; Semilla; Tetrazolio; Survival; Germination; Seedling; Seed; Tetrazolim; Botánica; Maestría. |
| Ano: 2014 |
URL: http://hdl.handle.net/10521/2326 |
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| Berrospe Ochoa, Edgar Alejandro. |
| El presente trabajo de investigación evaluó la cachaza como sustrato alternativo para la producción de plántula de tomate, con la finalidad de fomentar el uso de subproductos agroindustriales a través de tecnologías alternativas. La realización de la investigación se llevó a cabo en tres etapas: 1) elaboración de tratamientos por medio del secado, lavado y secado, compostaje o vermicompostaje de materiales puros o mezclas de ellos; 2) caracterización de los sustratos elaborados, determinando sus propiedades físicas como granulometría, densidad, curvas de retención y contenidos de humedad, además de propiedades químicas como pH, CE, CIC, MO, N, P, K, Ca, Mg y Na; 3) producción de almácigos, registrando porcentaje de germinación, longitud y volumen... |
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Palavras-chave: Semilleros de tomate; Plántulas; Horticultura; Soilles growing media; Filter mud; Nursery; Seedling; Maestría; Edafología. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/180 |
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| Berrospe Ochoa, Edgar Alejandro. |
| El presente trabajo de investigación evaluó la cachaza como sustrato alternativo para la producción de plántula de tomate, con la finalidad de fomentar el uso de subproductos agroindustriales a través de tecnologías alternativas. La realización de la investigación se llevó a cabo en tres etapas: 1) elaboración de tratamientos por medio del secado, lavado y secado, compostaje o vermicompostaje de materiales puros o mezclas de ellos; 2) caracterización de los sustratos elaborados, determinando sus propiedades físicas como granulometría, densidad, curvas de retención y contenidos de humedad, además de propiedades químicas como pH, CE, CIC, MO, N, P, K, Ca, Mg y Na; 3) producción de almácigos, registrando porcentaje de germinación, longitud y volumen... |
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Palavras-chave: Semilleros de tomate; Plántulas; Horticultura; Soilles growing media; Filter mud; Nursery; Seedling; Maestría; Edafología. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/180 |
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| Peñaloza,Patricia; Ramirez-Rosales,Gerardo; McDonald,Miller B; Bennett,Mark A.. |
| High seed quality is essential for optimum stand establishment in lettuce. As a result, it is necessary to have seed vigour tests that permit rapid, objective and accurate evaluation of seed quality. This study evaluated physical and physiological seed quality components of four seed lots of six lettuce varieties obtained from a commercial company. Seeds were evaluated for seedling emergence under greenhouse conditions, standard germination, seed physical aspects, the Saturated Salt Accelerated Aging (SSAA) test and the Seed Vigour Imaging System (SVIS). Results indicated that large-seeded lettuce varieties had higher percentage germination, higher SSAA values, higher SVIS index and more rapid and uniform greenhouse emergence. Black-seeded lettuce... |
| Tipo: Journal article |
Palavras-chave: Vegetables; Deterioration; Seedling; Performance. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000300010 |
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| Dos Santos Silveira,Conceição Eneida; Palhares,Dario; Barros,Karina; Pereira,Damasceno; Gomes Luís,Zanderluce; Rodrigues Pereira,Luiz Alfredo. |
| ABSTRACT Byrsonima basiloba Juss. is a fast growing shrub that produces edible and juicy fruits. This research studied the morphology and anatomy of seeds and seedlings. The hard endocarp was crested and triloculate, with one seed per locule. B. basiloba seed was composed of a testa and a tegmen with residual endosperm. The embryo was ivory, with long, foliaceous, circinate, anisophyllous cotyledons with disjointed apices. The embryonary axis was short, straight and occupied a small portion of the seed with short epicotyl, and radicle with a rudimentary root cap. In the seedlings, it was possible to differentiate the protoderm, procambium and ground meristem in the elongation zone. The differentiation process in this species occurred early in the embryo.... |
| Tipo: Journal article |
Palavras-chave: Seedling; Cotyledons; Endocarp; Amphistomy; Cerrado. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432016000200355 |
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| Registros recuperados: 55 | |
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