Consulta: subjectFacets:"Osmotic potential"
Registros recuperados: 25
Data/hora: 05/06/2024 11:49:18

Conductividad eléctrica de la solución nutritiva en el rendimiento y calidad de tomates (Lycopersicon esculentum Mill.) nativos cultivados en invernadero.
Provedor de dados: 32
Autores: Flores González, Dalila.
México cuenta con una gran diversidad de tomates (Lycopersicon esculentum Mill.) nativos, sin embargo, existen pocos estudios que muestren el potencial y adaptación de estos genotipos para ser cultivados en condiciones de invernadero e hidroponía, con capacidad para competir en calidad y productividad con las variedades comerciales. Por lo anterior, los objetivos de esta investigación fueron: 1) evaluar el potencial de rendimiento de 100 genotipos nativos de tomate cultivados en invernadero e hidroponía y seleccionar los 10 genotipos más sobresalientes en rendimiento y 2) evaluar el efecto de tres valores de conductividad eléctrica (CE) de la solución nutritiva Steiner en el crecimiento, rendimiento y calidad de diez genotipos nativos sobresalientes en...
Palavras-chave: Potencial osmótico; Producción; Genotipos nativos; Características organolépticas; Hidroponía; Osmotic potential; Production; Native genotypes; Organoleptic characteristics; Hydroponics; Maestría; Edafología; Lycopersicon esculentum.
Ano: 2011
URL: http://hdl.handle.net/10521/471

Potencial osmótico y absorción nutrimental en el cultivo in vitro de Agave potatorum Zucc.
Provedor de dados: 32
Autores: Solano Agama, Ana Luisa.
Con el objeto de conocer el efecto del potencial osmótico de las sales inorgánicas del medio de Murashige y Skoog se determinó el contenido de humedad, peso de materia seca, concentración y extracción nutrimental en brotes de Agave potatorum Zucc. Se establecieron medios de cultivo con los siguientes potenciales osmóticos: -0.187, -0.139, -0.094 y -0.050 MPa. El experimento se estableció con un diseño completamente al azar con tres repeticiones. Los datos obtenidos se sometieron a un análisis de varianza y comparación de medias. Después de 90 días del establecimiento del experimento se encontraron diferencias estadísticas significativas entre tratamientos para las variables evaluadas. El medio de cultivo con potencial osmótico de -0.187 MPa presentó los...
Palavras-chave: Agave potatorum; Potencial osmótico; Medio MS; Absorción; Extracción nutrimental; Osmotic potential; MS's medium; Nutrient absorption; Extraction; Maestría; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/412

Conductividad eléctrica de la solución nutritiva en el rendimiento y calidad de tomates (Lycopersicon esculentum Mill.) nativos cultivados en invernadero.
Provedor de dados: 32
Autores: Flores González, Dalila.
México cuenta con una gran diversidad de tomates (Lycopersicon esculentum Mill.) nativos, sin embargo, existen pocos estudios que muestren el potencial y adaptación de estos genotipos para ser cultivados en condiciones de invernadero e hidroponía, con capacidad para competir en calidad y productividad con las variedades comerciales. Por lo anterior, los objetivos de esta investigación fueron: 1) evaluar el potencial de rendimiento de 100 genotipos nativos de tomate cultivados en invernadero e hidroponía y seleccionar los 10 genotipos más sobresalientes en rendimiento y 2) evaluar el efecto de tres valores de conductividad eléctrica (CE) de la solución nutritiva Steiner en el crecimiento, rendimiento y calidad de diez genotipos nativos sobresalientes en...
Palavras-chave: Potencial osmótico; Producción; Genotipos nativos; Características organolépticas; Hidroponía; Osmotic potential; Production; Native genotypes; Organoleptic characteristics; Hydroponics; Maestría; Edafología; Lycopersicon esculentum.
Ano: 2011
URL: http://hdl.handle.net/10521/471

Procesos fisiológicos y contenido de polisacáridos estructurales en nopalito (Opuntia spp.) y su modificación por el potencial de agua del suelo
Provedor de dados: 32
Autores: García Ruiz, Mayra Teresa.
Se evaluaron los cambios de acidez titulable a lo largo de 24 h, de las yemas vegetativas con longitud media de 0.5 cm y nopalitos de 6 y 11 cm, de Opuntia ficus-indica de los cultivares Atlixco, Copena V1, Milpa Alta, Moradaza y Solferino, con riego. También se evaluó el efecto de la disminución del potencial de agua (ΨA) del suelo, por suspensión del riego durante 60 días, en condiciones de invernadero, en el potencial osmótico (ΨS ), liberación de electrolitos (o índice de daño membranal, Id) y contenido de polisacáridos estructurales de los nopalitos de esos cinco cultivares y una recolecta silvestre de O. streptacantha. La acidez de las yemas vegetativas y los nopalitos fluctuó entre 0.2 y 0.9 % a lo largo de las 24 horas del día, con las...
Tipo: Tesis
Palavras-chave: Acidez titulable; Potencial hídrico; Potencial osmótico; Polisacáridos; Maestría; Fisiología Vegetal; Tritable acidity; Water potential; Osmotic potential; Polysaccharides.
Ano: 2007
URL: http://hdl.handle.net/10521/1654

Potencial osmótico y absorción nutrimental en el cultivo in vitro de Agave potatorum Zucc.
Provedor de dados: 32
Autores: Solano Agama, Ana Luisa.
Con el objeto de conocer el efecto del potencial osmótico de las sales inorgánicas del medio de Murashige y Skoog se determinó el contenido de humedad, peso de materia seca, concentración y extracción nutrimental en brotes de Agave potatorum Zucc. Se establecieron medios de cultivo con los siguientes potenciales osmóticos: -0.187, -0.139, -0.094 y -0.050 MPa. El experimento se estableció con un diseño completamente al azar con tres repeticiones. Los datos obtenidos se sometieron a un análisis de varianza y comparación de medias. Después de 90 días del establecimiento del experimento se encontraron diferencias estadísticas significativas entre tratamientos para las variables evaluadas. El medio de cultivo con potencial osmótico de -0.187 MPa presentó los...
Palavras-chave: Agave potatorum; Potencial osmótico; Medio MS; Absorción; Extracción nutrimental; Osmotic potential; MS's medium; Nutrient absorption; Extraction; Maestría; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/412

Effects of Environmental Factors on Seed Germination and Emergence of Velvetleaf (Abutilon theophrasti)
Provedor de dados: 87
Autores: XIONG,RC.; MA,Y.; WU,HW.; JIANG,WL.; MA,XY.
ABSTRACT: Velvetleaf, an annual broadleaf weed, is a common and troublesome weed of cropping systems worldwide. Laboratory and field experiments were conducted to determine the effects of environmental factors on germination and emergence of velvetleaf. Seeds germinated over a range of constant temperatures from 10 to 40 oC regardless of light conditions, but no germination occurred at temperature below 5 oC and beyond 50 oC. Seeds germinated at alternating temperature regimes of 15/5 to 40/30 oC, with maximum germination (&gt;90%) at alternating temperatures of 40/30 oC. Germination was sensitive to water stress, and only 0.4% of the seeds germinated at the osmotic potential of -0.4 MPa. There was no germination at ? 0.6 MPa. Moreover, germination was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Burial depth; Light; Osmotic potential; Saline and alkaline stress; Temperature.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100321

Some biological aspects of the weed Lesser celandine (Ranunculus ficaria)
Provedor de dados: 87
Autores: Sohrabi Kertabad,S.; Rashed Mohassel,M.H.; Nasiri Mahalati,M.; Gherekhloo,J.
Lesser celandine (Ranunculaceae) is a perennial weed with tuberous root. Tubers are the most important means of reproduction and dispersion of this weed. In recent years, it has spread into wheat fields in Western Iran, mainly in the Lorestan province. A series of experiments were conducted to determine cardinal temperatures and to study the effects of pre-chilling, temperature fluctuations, tuber size, freezing and drying on germination of the tubers, as well as the effect of planting depth on sprouting of the tubers. The results obtained showed that the highest percentage of germination occurred when tubers were stored for more than 2 weeks at 4 or 8 ºC. The optimum temperature for germination differed in large and small tubers (8 and 14oC,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Freezing; Germination; Osmotic potential; Tuberous root.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300010

Effect of desiccation and salinity stress on seed germination and initial plant growth of Cucumis melo
Provedor de dados: 87
Autores: Sohrabikertabad,S.; Ghanbari,A.; Mohassel, Mohamad,H.R.; Mahalati,M.N.; Gherekhloo,J.
Smellmelon, an annual invasive weed of soybean production fields in the north of Iran, reproduces and spreads predominately through seed production. This makes seed bank survival and successful germination essential steps in the invasive process. To evaluate the potential of Smellmelon to invade water-stressed environments, laboratory studies were conducted to investigate the effect of desiccation and salinity at different temperatures on seed germination and seedling growth of Cucumis melo. Seeds were incubated at 25, 30, 35 and 40 ºC in the darkness in a solution (0, -0.2, -0.4, -0.6, -0.8, 1 and 1.2 MPa) of a salt (NaCl), and in a solution (0, -2, -4, -6, -8, -10, -12 bar) of PEG-6000 (Polyethylene glycol), in two separate experiments. The results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Osmotic potential; Cucurbitaceae; Seedling vigor index (SVL).
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000400009

Factors affecting Cyperus difformis seed germination and seedling emergence
Provedor de dados: 87
Autores: Derakhshan,A.; Gherekhloo,J.
Specific knowledge about the dormancy, germination, and emergence patterns of weed species aids the development of integrated management strategies. Laboratory studies were conducted to determine the effect of several environmental factors on seed germination and seedling emergence of Cyperus difformis. Germination of freshly harvested seeds was inhibited by darkness; however, when seeds were subsequently transferred to complete light they germinated readily. Our results showed that 2 wk of cold stratification overcome the light requirement for germination. Seeds of C. difformis were able to germinate over a broad range of temperatures (25/15, 30/20, 35/25, and 40/30 ºC day/night). The response of germination rate to temperature was described as a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Osmotic potential; Salinity stress; PH; Soil depth; Temperature.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000400008

Abiotic Factors Affecting Seed Germination and Early Seedling Emergence of Large Crabgrass (Digitaria sanguinalis)
Provedor de dados: 87
Autores: WANG,Y.H.; MA,Y.L.; FENG,G.J.; LI,H.H.
ABSTRACT:  Large crabgrass is one of the worst exotic weed in tropical, subtropical, and temperate regions of the world. In this study, the abiotic factors affecting seed germination and early seedling emergence of large crabgrass were investigated under laboratory conditions. The optimum temperatures of germination occurred at the range from 25 to 35 oC under 12 h light/12 h dark condition. Some seeds could germinate in the dark, but light exposure significantly stimulated the germination. Large crabgrass seed was tolerant to salinity level range of 0 to 160 and low water potential (11% germination at -0.8 MPa). Medium pH had no significant effect on seed germination and more than 90% seeds germination was obtained over a broad pH range from 4.0 to 10.0....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Temperature; Light; Osmotic potential; Heat-shock; Burial depth.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100268

Germination of Solanum nigrum L. (Black Nightshade) in Response to Different Abiotic Factors
Provedor de dados: 87
Autores: DONG,H.; MA,Y.; WU,H.; JIANG,W.; MA,X.
ABSTRACT: Solanum nigrum L. (black nightshade), an annual to short-lived perennial weed, has become a problem weed in farming systems in central China. Laboratory and greenhouse experiments were conducted to examine the influence of various abiotic factors on seed germination of black nightshade to develop effective weed control programs. Seeds germinated at a range of constant temperatures from 15 to 30 oC, but no germination occurred at temperatures below 10 oC or above 35 oC. Seeds also germinated at alternating temperature regimes from 15/5 to 40/30 oC, with maximum germination (&gt; 93.5%) at the alternating temperatures of 25/15 and 30/20 oC. Germination decreased as osmotic potential became more negative, and no germination was observed at ≤ -0.8...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Burial depth; Light; Osmotic potential; Saline and alkaline stress; Seed biology; Temperature.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100245

Soil Water Potentials and Capsicum annuum L. under Salinity
Provedor de dados: 90
Autores: and,Heitor Henrique Félix Duarte; Souza,Edivan Rodrigues de.
ABSTRACT Investigations into water potentials in the soil-plant system are of great relevance in environments with abiotic stresses, such as salinity and drought. An experiment was developed using bell pepper in a Neossolo Flúvico (Fluvent) irrigated with water of six levels of electrical conductivity (0, 1, 3, 5, 7 and 9 dS m-1) by using exclusively NaCl and by simulating the actual condition (using a mixture of salts). The treatments were arranged in a randomized block design, in a 6 × 2 factorial arrangement, with four replicates. Soil matric (Ψm) and osmotic (Ψo) potentials were determined 70 days after transplanting (DAT). Soil total potential was considered as the sum of Ψm and Ψo. Leaf water (obtained with the Scholander Chamber) and osmotic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water relations; Osmotic potential; Bell pepper.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100403

Salicylic acid in the physiological priming of onion seeds subjected to water and salt stresses
Provedor de dados: 91
Autores: Silva,José E. S. B. da; Paiva,Emanoela P. de; Leite,Moadir de S.; Torres,Salvador B.; Souza Neta,Maria L. de; Guirra,Keylan S.
ABSTRACT This study aimed to evaluate the effect of physiological priming with salicylic acid on the mitigation of water and salt stresses on onion (Allium cepa L.) seeds. For this, seeds of onion, cultivar IPA 11, were soaked in salicylic acid solution (50 µM) for 24 h and placed to germinate at different water and saline potentials. For water stress, the experiment was conducted in a completely randomized design, in a 2 x 5 factorial scheme (salicylic acid with 0 and 50 µM and osmotic potentials of 0, -0.1, -0.2, -0.3, -0.4 MPa induced by polyethylene glycol 6000), with four repetitions of 50 seeds per plot. In salt stress, the adopted experimental design was completely randomized, with treatments distributed in a 2 x 4 factorial scheme (salicylic acid...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allium cepa; Mitigator; Water deficit; Osmotic potential.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001200919

Seed germination of Bowdichia virgilioides Kunth, under water stress
Provedor de dados: 91
Autores: Silva,Lígia M. de M.; Aguiar,Ivor B. de; Rodrigues,Teresinha de J.D.
Bowdichia virgilioides (Leguminosae-Papilionoideae) is a native tree species in Brazil characteristic of the savannah vegetation. Seeds of this species were submitted to different osmotic potentials induced by polyethyleneglycol (PEG-6000) in order to verify their resistance to drought conditions. Seeds were previously scarified with sulphuric acid and incubated at 25 ºC with an eight hours photoperiod, at osmotic potentials of 0.0, -0.1, -0.3, -0.5, -0.7, -0.9 and -1.1 MPa. It was found that water stress resistance limit ranged from -0.7 to -0.9 MPa. Significant reduction in germination velocity from -0.3 MPa, and final percentage of germination from -0.5 MPa in relation to control, were observed. Germination under drastic conditions of water stress was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest seed; Physiological quality; Osmotic potential; Polyethyleneglycol.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662001000100021

Germination and tolerance of cowpea (Vigna unguiculata) cultivars to water stress
Provedor de dados: 91
Autores: Paiva,Emanoela P. de; Sá,Francisco V. da S.; Torres,Salvador B.; Brito,Marcos E. B.; Moreira,Romulo C. L.; Silva,Luderlândio de A.
ABSTRACT The objective of this study was to evaluate the tolerance of cowpea cultivars to water stress, during seed germination and seedling establishment. For this, a completely randomized experimental design was used in a factorial scheme consisting of nine cultivars of cowpea (BRS Guariba, BRS Potengi, BRS Itaim, BRS 17 Gurguéia, BRS Aracê, Paulistinha, Maratanã, Costela-de-Vaca and Canapu-Branco) and two levels of osmotic potential induced by PEG 6000 (0.0 MPa (control) and -0.4 MPa) in four replicates of 50 seeds. The variables analysed were germination, germination first count, root and shoot lengths, and dry matter accumulation of shoots and roots. The dissimilarity between the genotypes was also determined by Euclidean distance. Germination and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Initial growth; Polyethylene glycol; Osmotic potential.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000600407

Seed physiological quality and seedling growth of pea under water and salt stress
Provedor de dados: 91
Autores: Pereira,Isabella C.; Catão,Hugo C. R. M.; Caixeta,Franciele.
ABSTRACT The aim of this study was to evaluate seed physiological quality and initial pea (Pisum sativum) seedling development at different water and salt potentials. Polyethylene glycol 6000, sodium chloride and potassium chloride solutions with different osmotic potentials (0; -0.2; -0.4; -0.6; -0.8; -1.0, and -1.2 MPa) were used, and the experiment had a 3 × 7 factorial arrangement. The physiological quality and initial seedling growth characteristics (first germination count, final germination count, strong normal seedlings, epicotyl and taproot lengths, epicotyl dry matter, and root dry matter) were evaluated in a completely randomized experimental design, with four repetitions. Decreases in the observed variables showed that the simulated stress...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pisum sativum; Vegetable; Polyethylene glycol; Osmotic potential.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000200095

Soil water energetic status and cowpea beans irrigated with saline water
Provedor de dados: 91
Autores: Oliveira,Wanderson J. de; Souza,Edivan R. de; Almeida,Brivaldo G. de; Silva,Ênio F. de F. e; Melo,Hidelblandi F. de; Leal,Lucas Y. C.
ABSTRACT The study of the water energetic status under saline condition and its impact on the development of cowpea is of extreme importance, since this crop is the food base in many parts of the world. An experiment was carried out in a greenhouse from March to May 2014 using the cultivar IPA 206 in Fluvisol collected in the municipality of Pesqueira, PE, Brazil. Waters with six levels of electrical conductivity (0; 2.5; 5; 7.5; 10; 12.5 dS m-1) formulated with NaCl and a salt mixture were used. The experiment was conducted in randomized blocks in a 6 x 2 factorial arrangement with four replicates, forming 48 experimental plots. The matric, osmotic and total potential of water in the soil, the osmotic, and water potential in the plant and atmospheric...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water potential; Osmotic potential; Vigna unguiculata.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000800685

Germination and initial development of Simira gardneriana seedling under water stress and at different temperatures
Provedor de dados: 91
Autores: Oliveira,Fabrícia N. de; Oliveira,Jessica R. de; Torres,Salvador B.; Freitas,Rômulo M. O. de; Nogueira,Narjara W.
ABSTRACT The germination of seeds is affected by many factors, including water availability and temperature. This study aimed to evaluate the effects of water stress and different temperatures on germination and initial development of S. gardneriana M. R. Barbosa &amp; Peixoto seedlings. The experiment was carried out in a completely randomized design, in a 7 x 4 factorial scheme, with seven potentials (0; -0.1; -0.2; -0.3; -0.4; -0.5 and - 0.6 MPa) and four temperatures (25, 30, 35 and 20-30 °C), with four replicates of 25 seeds. The analyzed variables were germination, percentage of normal seedlings, germination speed index, seedling length (shoot and root) and dry weight (shoot and root). There is a decrease in the germination and vigor of the seeds as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rubiaceae; Caatinga; Osmotic potential; Forest species.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500333

Response mechanisms of Brachiaria brizantha cultivars to water deficit stress
Provedor de dados: 96
Autores: Santos,Patricia Menezes; Cruz,Pedro Gomes da; Araujo,Leandro Coelho de; Pezzopane,José Ricardo Macedo; Valle,Cacilda Borges do; Pezzopane,Cristiana de Gaspari.
Two cultivars of Brachiaria brizantha (Hochst ex. A. Rich) Stapf. (Syn. Urochloa) were evaluated for their adaptation to water deficit and the stress response mechanisms in a greenhouse experiment. The experimental design was in completely randomized blocks with a 2 × 2 × 4 factorial arrangement. The Marandu and BRS Piatã cultivars were evaluated under two water availability conditions, with or without water restriction. The harvests were carried out 0, 7, 14 and 28 days after the start of water restriction. For both cultivars, the water deficit stress caused a reduction in shoot biomass and leaf area and an increase in the percentage of roots in the deeper soil layers. The B. brizantha cv. Marandu reached critical levels of leaf water potential in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: BRS Piatã; Marandu; Osmotic potential; Water availability; Water potential.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001100001

Water stress on germination and vigor of ‘mofumbo’ (Combretum leprosum Mart.) seeds at different temperatures
Provedor de dados: 124
Autores: Leal,Caio César Pereira; Torres,Salvador Barros; Dantas,Nadjamara Bandeira de Lima; Aquino,Gutierres Silva Medeiros; Alves,Tatianne Raianne Costa.
ABSTRACT Combretum leprosum Mart., commonly known as ‘mofumbo’, is used for medicinal purposes, recovery of degraded areas and apiculture. The objective of this study was to evaluate the effect of water stress on the germination and vigor of C. leprosum seeds as function of different temperatures. To compose the treatments, the substrate used was paper roll moistened with polyethylene glycol solutions (PEG 6000), at the following levels of osmotic potential: 0.0; -0.1; -0.2; -0.2; -0.4; and -0.5 MPa, and placed in chamber at constant temperatures of 25, 30 and 35 and alternating temperature of 20-30 °C, forming a 6 x 4 factorial. The seeds were submitted to the following evaluations: germination percentage, germination speed index, root length, shoot...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Combretaceae; Osmotic potential; Abiotic stress.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100413

Avaliação de cultivares de soja quanto à tolerância ao estresse hídrico em substrato contendo polietileno glicol - DOI: 10.4025/actasciagron.v30i2.1731
Provedor de dados: 1
Autores: Texeira, Leandra Regina; UEM; Braccini, Alessandro de Lucca e; UEM; Sperandio, Decio; UEM; Scapim, Carlos Alberto; UEM; Schuster, Ivan; Cooperativa Central de Pesquisa Agricola; Viganó, Joselaine; UEM.
O trabalho teve por objetivo avaliar genótipos de soja quanto à tolerância ao estresse hídrico, em substrato embebido com polietileno glicol (PEG 6000). Foram utilizadas sementes armazenadas por um ano, em condições não-controladas de laboratório das cultivares: CD 201, CD 202, CD 204, CD 205, CD 206, CD 208, CD 215, CD 216, Embrapa 48, BRS 132, BRS 184 e BRS 212. As avaliações consistiram em submeter às sementes aos testes de germinação, classificação do vigor das plântulas, comprimento e biomassa seca das plântulas, em condição de estresse hídrico, utilizando dois níveis de potencial osmótico (zero e -0,1 MPa). As cultivares foram agrupadas em diferentes classes de tolerância à seca, em razão da redução percentual nas características avaliadas {% Redução...
Palavras-chave: 5.01.03.05-9    Melhoramento Vegetal Glycine max (L.) Merrill; Sementes; Potencial osmótico; Germinação; Estresse hídrico 5.01.03.05-9    Melhoramento Vegetal Glycine max (L.) Merrill; Seeds; Osmotic potential; Germination; Water stress.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1731

Germination of Senna Occidentalis link: seed at different osmotic potential levels
Provedor de dados: 52
Autores: Delachiave,Maria Elena Aparecida; Pinho,Sheila Zambello de.
The objective of this research was to study the effect of osmotic potential and salinity on the germination of seeds of Senna occidentalis, with and without a change of solutions. The percentage and rates of germination decreased according to decrease of potential, being more drastic when the substitutions of solutions were not made. The largest reductions were observed with the PEG solutions, with and without substitutions.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germination; Seed; Osmotic potential; Senna occidentalis.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200004

Impact of water potential on growth and germination of Fusarium solani soilborne pathogen of peanut
Provedor de dados: 58
Autores: Palacios,Sofia; Casasnovas,Francisco; Ramirez,María L.; Reynoso,María. M.; Torres,Adriana M.
Studies were conducted to determine the effect of osmotic and matric stress on germination and growth of two Fusarium solani strains, the etiological agent responsible of peanut brown root rot. Both strains had similar osmotic and matric potential ranges that allowed growth, being the latter one narrower. F. solani showed the ability to grow down to -14 MPa at 25 °C in non-ionic modified osmotic medium, while under matric stress this was limited to -8.4 MPa at 25 °C. However, both strains were seen to respond differently to decreasing osmotic and matric potentials, during early stages of germination. One strain (RC 338) showed to be more sensitive to matric than osmotic (non ionic) and the other one (RC 386) showed to be more sensitive to osmotic than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fusarium solani; Germination; Growth; Matric potential; Osmotic potential; Peanut brown root rot; Soilborne pathogen.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300046

Ecophysiology of coconut palm under water stress
Provedor de dados: 61
Autores: Gomes,Fábio P.; Prado,Carlos H.B.A.
Coconut palm is of great social and economic importance for millions of people in the tropics and subtropics. Drought is one of the main environmental factors that limit coconut productivity. In this review, physiological and morphological data are presented in an integrated perspective to provide a holistic view of the behavior of coconut trees facing water deficit under both field and controlled conditions. Great capacity to produce homorhizic roots capable of searching continuously for water and nutrients and high protoplasmic tolerance in leaves allows the coconut tree to endure water deficit. High membrane stability, osmoprotection, osmoregulation and enhanced activity of antioxidant enzymes are characteristics often found in leaves of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cocus nucifera; Desiccation tolerance; Leaf gas exchange; Leaf water relations; Net photosynthesis; Osmotic potential; Water potential; Water-use efficiency.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000400008

Mitigating effect of salicylic acid and nitrate on water relations and osmotic adjustment in maize, cv. Lluteño exposed to salinity
Provedor de dados: 118
Autores: Escobar,Hugo; Bustos,Richard; Fernández,Felipe; Cárcamo,Henry; Silva,Herman; Frank,Nicolás; Cardemil,Liliana.
We analyzed the mitigating effect of NO3 - and salicylic acid (SA) on the detrimental effects of salt stress by studying the water status of plants of maize grown in Hoagland's medium with NaCl 100 mM as the saline component, to which SA and NO3 - were added in different concentrations as mitigating agents. We evaluated water potential &amp;#936;w, osmotic potential &amp;#936;s, relative water content (RWC), turgor potential (&amp;#936;p ), and the osmotic adjustment (OA) of leaves and roots. SA 0.5 mM mitigated the effects of salinity by increasing the &amp;#936;w of the leaf, the &amp;#936;sof theroot, the &amp;#936;pof the leaf, RWC and OA of the leaf; while NO3 was only effective in combination with SA, mitigating the effects of salinity by increasing...
Tipo: Journal article
Palavras-chave: Nitrate; Osmotic potential; Osmotic adjustment; Salinity mitigation; Salicylic acid; Water potential; Water relative content.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000300006