|
|
|
| Registros recuperados: 14 | |
|
|
| 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 |
| |
|
|
| Gondim,Franklin A; Gomes-Filho,Enéas; Lacerda,Claudivan F; Prisco,José Tarquinio; Azevedo Neto,André D; Marques,Elton C. |
| The aim of this study was to evaluate the effects of H2O2 on germination and acclimation of maize plants subject to salt stress. Three experiments using BRS3003 seeds, a triple hybrid of maize, were carried out in a growth room and in greenhouse. In the first experiment, H2O2 accelerated the germination percentage of seeds at 100 mM, but not at 500 mM. In the second experiment, the pretreatment of seeds was observed to induce a pronounced increase in ascorbate peroxidase (APX) and catalase (CAT) enzyme activity after 30 h of soaking in H2O2. It was also observed that guaiacol peroxidase (GPX) activity was smaller in the seeds soaked in H2O2 for 12, 24, 30, 36 and 42 h, in relation to those soaked in distilled water. The superoxide dismutase (SOD) activity... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant enzymes; Hydrogen peroxide; Oxidative stress; Salinity stress; Zea mays. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000200004 |
| |
|
|
| Viégas,Ricardo Almeida; Fausto,Maria José Martins; Queiroz,José Elenildo; Rocha,Iza Marineves Almeida; Silveira,Joaquim Albenísio Gomes; Viégas,Pedro Roberto Almeida. |
| In this study the early effects of salinity on growth, total N and ion accumulation and partitioning in Prosopis juliflora (common name algaroba) were studied with 30-day-old plants grown for 8 days in aerated nutrient solution (NS) free of (control) or supplied with 25, 50, 75 and 100 mmol.L-1 NaCl. Plants grown in 25 and 50 mmol.L-1 NaCl accumulated a total dry mass (DM) and shoot N content greater than the control. However, at 75 and 100 mmol.L-1 NaCl such parameters were diminished. Whole plant transpiration rates were higher with 25 and 50 mmol.L-1 NaCl and lower with 75 and 100 mmol.L-1 NaCl. Salinity did not influence shoot (80%) and root (70%) water content (WC) but reduced the K+ content of shoot while that of root was not affected. Increasing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ion partitioning; Nitrogen; Salinity stress. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000100009 |
| |
|
|
| Castro V,Mónica; Iturrieta E,Rodrigo; Fassio O,Claudia. |
| The avocado tree (Persea americana Mill.) is one of the species most sensitive to salinity. Since the root system of this species is particularly affected by this type of stress, it is crucial to find a rootstock that is tolerant to saline water irrigation. Plant material from the cv. Hass was grafted on five rootstocks to find possible candidates: the clonal Duke 7, Nabal, Degania 117,Mexicola, and Zutano seedlings. One year-old plants were placed in 55 L pots; river sand was used as substrate, and the plants were fertilized with a modified Hoagland solution. Vegetative growth and internal nutrient content were compared with control plants with 30 mg L-1 of Cl-, and plants treated with 200 mg L-1 Cl- for 130 days using NaCl in the nutrient... |
| Tipo: Journal article |
Palavras-chave: Chloride; Sodium; NaCl; Salinity stress; Rootstocks. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300003 |
| |
|
| |
|
|
| Sanjuan Lara, Felipe. |
| La diversidad de poblaciones de jitomate mexicano es una fuente invaluable de recursos fitogenéticos para la búsqueda de mejoramiento a estrés salino e incrementar la productividad en suelos y agua con salinidad. Las variedades (injerto) sensibles a la salinidad sobre portainjertos tolerantes a estrés salino es un método alternativo para producir en ambientes salinos. El presente estudio tuvo como objetivo general evaluar líneas de jitomate nativo en condiciones de salinidad y con base a resultados de carácter agronómico y morfológico seleccionar portainjertos tolerantes a salinidad en condiciones protegidas. El estudio se dividió en tres fases: Fase I, se colectaron y caracterizaron en casa sombra 120 selecciones individuales de jitomate con un productor... |
|
Palavras-chave: Solanum lycopersicum; Portainjertos; Estrés salino; Rendimiento; Calidad; Root stocks; Salinity stress; Yield; Quality; Fisiología Vegetal; Doctorado. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2033 |
| |
|
|
| Li,Rui; Wang,Wanjun; Wang,Wenguo; Li,Fosheng; Wang,Qingwei; Xu,Ying; Wang,Shenghua. |
| Background Cysteine proteinase inhibitor (cystatin, CPI) is one of the most important molecules involved in plant development and defense, especially in the regulation of stress responses. However, it is still unclear whether the Jatropha curcas CPI (JcCPI) gene functions in salinity response and tolerance. In this study, the sequence of the JcCPI gene, its expression pattern, and the effects of overexpression in Escherichia coli and Nicotiana benthamiana were examined. The purpose of this study was to evaluate the regulatory role of JcCPI in salinity stress tolerance. Results The CPI gene, designated JcCPI, was cloned from J. curcas; its sequence shared conserved domains with other plant cystatins. Based on a transcription pattern analysis, JcCPI was... |
| Tipo: Journal article |
Palavras-chave: Cysteine proteinase inhibitor; Jatropha curcas; Salinity stress. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000500008 |
| |
|
|
| Ayache, Nour; Hervé, Fabienne; Martin-jézéquel, Veronique; Amzil, Zouher; Caruana, Amandine. |
| Several coastal countries including France have experienced serious and increasing problems related to Pseudo‐nitzschia toxic blooms. These toxic blooms occur in estuarine and coastal waters potentially subject to fluctuations in salinity. In this study, we document for the first time the viability, growth, photosynthetic efficiency and toxin production of two strains of Pseudo‐nitzschia australis grown under conditions with sudden salinity changes. Following salinity variation, the two strains survived over a restricted salinity range of 30 to 35, with favorable physiological responses, as the growth, effective quantum yield and toxin content were high compared to the other conditions. In addition, high cellular quotas of domoic acid (DA) were observed at... |
| Tipo: Text |
Palavras-chave: Amnesic shellfish poisoning; Domoic acid; Harmful algae; Pseudo-nitzschia australis; Salinity stress. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00462/57385/59465.pdf |
| |
|
| |
|
|
| Ghaderi-Far,F; Gherekhloo,J.; Alimagham,M.. |
| Laboratory and greenhouse experiments were conducted to determine the effects of drought and salinity stress, temperature, pH and planting depth on yellow sweet clover (Melilotus officinalis) germination and emergence. Base, optimum and ceiling germination temperatures were estimated as 0, 18.47 and 34.60 ºC, respectively. Seed germination was sensitive to drought stress and completely inhibited at a potential of -1 MPa, but it was tolerant to salinity. Salinity stress up to 90 mM had no effect over the M. officinalis seed germination, but the germination decreased by increasing the salt concentration. The drought and salinity required for 50% inhibition of maximum germination were 207 mM and -0.49 MPa, respectively. High percentage of seed germination... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Germination; PH; Salinity stress; Soil depth; Temperature; Water stress. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000300002 |
| |
|
|
| LIU,X.; ZONG,T.; LI,Y.; ZHOU,X.; BAI,L.. |
| ABSTRACT: Carolina geranium (Geranium carolinianum) is an emerging invasive weed in rape and wheat fields in China. A better understanding of its germination and emergence ecology will enable the development of integrated weed control strategies. In this study, we investigated the effects of temperature, photoperiod, soil water content, salinity, and burial depth, on germination and emergence of Carolina geranium. Germination percentages were over 74% under 15/20 and 20/25 oC night/day temperature regimes. Germination rate was independent of light/dark regime. Increasing salinity reduced germination of Carolina geranium from 81.1% at 0 mM to 0% at 160 mM NaCl. Seeds germination was peaked at 50% soil moisture, but was completely inhibited at < 20% and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Temperature; Photoperiod; Salinity stress; Soil water content; Burial depth. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100335 |
| |
|
|
| 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 |
| |
|
|
| Viégas,Ricardo A.; Silveira,Joaquim A. G. da; Lima Junior,Adeildo R. de; Queiroz,José E.; Fausto,Maria J. M.. |
| The NaCl effects on the growth and inorganic solute accumulation were studied on 30-day-old cashew plants (Anacardium occidentale L.) hydroponically grown for 8 days (short term) and 40 days (long-term) with NaCl at different levels. The shoot fresh mass yielded after 40 days, in response to 50 and 100 mol m-3 NaCl, decreased by 25 and 75%, respectively. This decrease was markedly low in root fresh mass, which did not change under 50 mol m-3 NaCl and decreased nearly to 30% under 100 mol m-3 NaCl, as compared to control plants. In short-term experiment, salinity induced only slight changes of K+ tissue concentrations in the whole plant. In the long-term experiment, K+ tissue concentrations were substantially decreased, particularly in roots. In response to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anacardium occidentale; Salinity stress; Ionic toxicity; Potassium; Sodium; Chloride. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662001000200007 |
| |
|
|
| Araújo,Sandro A.M. de; Silveira,Joaquim A.G.; Almeida,Tânia D.; Rocha,Iza M.A.; Morais,Déborah L.; Viégas,Ricardo A.. |
| The current study reports effects of salt stress on growth, K+ nutrition and organic composition of Atriplex nummularia. The upper limit of the NaCl gradient imposed on the plants was close to seawater salinity (600 mM). An external NaCl of 150 mM improved the growth of this species, which corroborates its halophytic nature. Evidence show that Atriplex nummularia was responsive to NaCl, but the mechanisms of this response are still not known. In such stress condition, Na+ and Cl- accumulation in leaves was far greater than that in roots; therefore salinity tolerance of Atriplex nummularia is not due to ion exclusion mechanism. In spite of a reduction of K+ content of tissues under salinity conditions, no corresponding physiological relevance of this in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycophytes; Salinity stress; Ionic imbalance. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662006000400010 |
| |
| Registros recuperados: 14 | |
|
|
|
