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| Registros recuperados: 38 | |
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| Grisi,Patrícia Umeda; Gualtieri,Sônia Cristina Juliano; Ranal,Marli Aparecida; Santana,Denise Garcia. |
| Sapindus saponaria (soapberry) is a species that presents a great diversity of chemical compounds, such as saponins; however, few studies have examined the allelopathic effect of this species. Therefore, this study provides an evaluation of the allelopathic potential of aqueous extracts of the roots and mature leaves of S. saponaria on the germination of diaspores and seedlings growth of lettuce (Lactuca sativa) and onion (Allium cepa). The aqueous extract was prepared in the proportion of 100 g of dry plant material in 1,000 mL of distilled water (a concentration of 10% w v-1), and diluted with distilled water to 7.5, 5.0 and 2.5% concentrations. The mature leaf extracts caused delay and decrease in the germination process of the lettuce and onion... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Lettuce; Onion; Soapberry. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000100002 |
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| Amirouche, mawhoub. |
| The search for decision-making tools is essential in order to control agricultural practices and plan for sustainable agriculture that respects the environment. To this end, FAO has developed an evaluation model called AquaCrop, which covers most technical routes, including fertilization. In this perspective, this study focuses on the AquaCrop model (v6.1) to calibrate it for the simulation of lettuce crop yields (Lactuca sativa L), under different fertilization levels for the trial periods (2015/2016) and (2016/2017). Four levels of fertilization were examined under rain conditions, namely T1 (0 kg N/ha), T2 (60 kg N/ha), T3 (120 kg N/ha) and T4 (180 kg N/ha). The model performance was evaluated using the coefficient of determination (R2), the square root... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: AquaCrop; Lettuce; Calibration; Validation; Fertility stress; Water productivity. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6195 |
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| KRAUSE-SAKATE,RENATE; MELLO,RAQUEL N.; PAVAN,MARCELO A.; ZAMBOLIM,EUNIZE M.; CARVALHO,MURILO G.; LE GALL,OLIVIER; ZERBINI,F. MURILO. |
| Efetuou-se a clonagem e seqüenciamento do gene que codifica a proteína capsidial de dois isolados do vírus do mosaico da alface (Lettuce mosaic virus, LMV) provenientes do estado de São Paulo, previamente caracterizados como pertencentes aos patótipos II (AF198, incapaz de infetar cultivares com os genes de resistência mo1¹ ou mo1²) e IV (AF199, capaz de quebrar a resistência propiciada pelos genes mo1¹ e mo1²), com base na virulência em cultivares diferenciadoras. Análise comparativa das seqüências de nucleotídeos de isolados provenientes da Europa, América do Norte, Oriente Médio e os dois isolados brasileiros não permitiu sua separação em estirpes, pois as porcentagens de homologia foram sempre superiores a 95%. Entretanto, análise filogenética dos... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca; Lettuce; Potyvirus; LMV; Capsid protein; Cloning; Resistance. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582001000200006 |
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| Jiménez,Kenia Barrantes; McCoy,Clyde B.; Achí,Rosario. |
| A Multiplex Polymerase Chain Reaction (PCR) assay to be used as an alternative to the conventional culture method in detecting Shigella and enteroinvasive Escherichia coli (EIEC) virulence genes ipaH and ial in lettuce was developed. Efficacy and rapidity of the molecular method were determined as compared to the conventional culture. Lettuce samples were inoculated with different Shigella flexneri concentrations (from 10 CFU/ml to 10(7) CFU/ml). DNA was extracted directly from lettuce after inoculation (direct-PCR) and after an enrichment step (enrichment PCR). Multiplex PCR detection limit was 10(4) CFU/ml, diagnostic sensitivity and specificity were 100% accurate. An internal amplification control (IAC) of 100 bp was used in order to avoid false... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: PCR; Shigella; Rapid method; Lettuce; Food. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400018 |
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| Colariccio,Addolorata; Chaves,Alexandre L.R.; Eiras,Marcelo; Chagas,César M.; Roggero,Piero. |
| During surveys undertaken from 1998 to 2003 in the major vegetable growing areas of the city of São Paulo green belt, lettuce (Lactuca sativa) and endive (Cichorium endivia) plants were observed, which showed chlorotic thickening of foliar veins, defective growth and, in some cases, failure to form complete heads. Biological and serological [DAS-Enzyme linked immunosorbent assay (Elisa)] tests together with electron microscope observations, revealed the presence of Lettuce big-vein virus and Mirafiori lettuce virus, in these plants both responsible for the lettuce big-vein syndrome. |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Lettuce big-vein associated virus; Mirafiori lettuce virus; Lettuce; Virus transmitted by fungi. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000400014 |
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| Ramires,Maiara Figueiredo; Souza,Eduardo Lorensi de; Fontanive,Daniel Erison; Bianchetto,Renan; Krynski,Ângelo Munaretto; Cezimbra,Júlio Cesar Grasel; Antoniolli,Zaida Inês. |
| ABSTRACT Pork is the most consumed animal protein around the world. The production levels are significant, which results in the generation of large amounts of slaughter waste. Such waste is often disposed of improperly in agricultural areas, causing environmental imbalance by the contamination of soil and water sources with metals and pathogenic organisms. This study evaluates the phytotoxic effects of pig slaughterhouse waste in natura and after stabilization processes on lettuce (Lactuca sativa Linnaeus, 1753), radish (Raphanus sativus Linnaeus, 1753), and rice (Oryza sativa Linnaeus, 1753), in addition to shoot nutrient contents. To do this, the waste was evaluated through phytotoxicity tests on lettuce, radish, and rice plants in natura (PSWin) as well... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pig farming; Phytotoxicity; Lettuce; Radish; Rice. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100521 |
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| Molina-Montenegro,Marco A; Zurita-Silva,Andrés; Oses,Rómulo. |
| Water is essential for plants, affecting the majority of the physiological processes related to growth and productivity. Water shortage is one of the most common factors that limit crop productivity worldwide. Many cultivars have elevated water requirements, nevertheless in some countries due to global climate change effects, the availability of water for irrigation is becoming limited. In fact, current models of climate changes predict that central Chile will be a sensitive zone where precipitation will drastically decrease. In this study, the variation of gas exchange and production of fresh biomass in a lettuce cultivar, grown under different water availability regimes, was evaluated. Additionally, the concentration of total soluble sugar and water use... |
| Tipo: Journal article |
Palavras-chave: Soluble sugars; Water use efficiency; Water shortage; Lettuce; Photosynthetic rate. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100006 |
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| de Carvalho, Ricardo Oliano; Machado, Miguel Borges; Scherer, Vinícius Saldanha; Fuentes, Giovani Castro; da Luz, Carlos Alberto Silveira; da Luz, Maria Laura G. Silva. |
| Lettuce is a leafy vegetable most consumed in Brazil, and is considered the basis for salads and can be grown by hydroponics system. Hydroponics is a viable alternative to be implemented, with benefits for soil conservation and preservation of water sources. This work aimed to study the market of trailers snacks in Pelotas to analyze the economic feasibility of deploying an enterprise for the production of hydroponic lettuce, minimally processed, on a farm located in the city of Pelotas. The trailers were classified as small, medium and large, according to the consumption of lettuce. From market analysis, facilities and greenhouses for hydroponics area for processing of lettuce with flowchart of activities and mass balance were designed. The lettuce is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lettuce; Hydroponic system; Production.. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3112 |
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| Salazar Ordaz, Liliana. |
| El presente trabajo se llevó a cabo para determinar la distribución e incidencia de Bremia lactucae en los estados de Guanajuato, Puebla y Zacatecas, asimismo se evaluó la resistencia a este patógeno y la calidad postcosecha en 18 variedades de lechuga: Yuma, Costello, Grizzly, Honcho II, Rhino, Top Billings, Warrior, Magnum, Annie, Cool Guard, Denver, Raider, Stallion, Top Gun, Sure Shot, Niner, Red Coach y 9852. Nuestros resultados permitieron confirmar la presencia del patógeno en los estados de Guanajuato, Zacatecas y Puebla donde la incidencia promedio fue 43.11%, 100% y 21.5% respectivamente. Las variedades de lechuga más cultivadas en estos estados fueron Sun Devil, Siskiyou y Coolguard. Sin embargo, las variedades con mayor intensidad de la... |
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Palavras-chave: Lechuga; Bremia lactucae; Calidad postcosecha; Susceptibilidad; Lettuce; Postharvest quality; Susceptibility; Maestría; Fitopatología. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/376 |
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| Oberpaur,Christel; Fernández,Carolina; Délano,Guillermo; Arévalo,M.Eugenia. |
| The most frequently used substrate for the production of covered root seedlings is peat, the extraction of which is under scrutiny due to its negative environmental impact; however, the use of Sphagnum moss in adequate mixtures constitutes a possible alternative. Lettuce seeds (Lactuca sativa L.) were sown in Polystyrene trays (240 alveoli, 24 cm³) to test four substrates, 50% Sphagnum moss mixed with 50% humus or compost and 60% Sphagnum moss with 40% humus or compost, and commercial peat was used as a control. A dose (2.5 or 3.5 gL-1) of controlled-release fertilizer (CRF) was added to all substrates except for the control mix, and the substrates were subsequently irrigated with or without a fertilizer solution. The study was conducted under shaded... |
| Tipo: Journal article |
Palavras-chave: Compost; Humus; Lettuce; Slow release fertilizer; Sphagnum moss. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300004 |
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| Registros recuperados: 38 | |
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