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Tipo do documento Text (3) Ano 2017 (2) 2006 (1) País France (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 80 Primeira ... 1 2 3 4 ... Última Germination Ecology of Lathyrus aphaca, a Problematic Weed of Wheat Crop under Semi-Arid Conditions of Pakistan Planta Daninha AAMIR,M.; KHAN,E.A.; BALOCH,M.S.; ASLAM,M.. ABSTRACT: Lathyrus aphaca is an aggressive dicotyledonous weed. The effect of different agroecological components/factors on the germination ecology of this weed was explored under a glasshouse and laboratory condition in 2014. The germination response of L. aphaca was lower at high temperature while maximum seed germination was found at 15/12 oC (day/night). Light significantly stimulated L. aphaca germination; nevertheless, substantial germination occurred under dark conditions. More than 86-90% of L. aphaca seeds germinated at pH level of 6.2-7.5. A significant quantity of seed germinated at 250 mM NaCl. There was no germination at -1 MPa. When the temperature was lower than 20/15 oC (day/night) initiation time of germination and germination index (GI)... Tipo: Info:eu-repo/semantics/article Palavras-chave: Osmotic stress; Weed seeds; Salt stress; Temperature; PH; Light. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100253 Physiological and biochemical changes occurring in dwarf-cashew seedlings subjected to salt stress Braz. J. Plant Physiol. Abreu,Carlos E.B. de; Prisco,José T.; Nogueira,Ana R.C.; Bezerra,Marlos A.; Lacerda,Claudivan F. de; Gomes-Filho,Enéas. The effects of salt stress on some physiological and biochemical traits were evaluated in dwarf-cashew seedlings at the same developmental stage. Seeds were sown in trays containing vermiculite moistened with distilled water or with NaCl solutions having different electrical conductivities: 0.7, 1.8, 6.0, 9.8, 13.4, 17.4 and 20.6 dS m-1. Salinity delayed and inhibited seedling growth and development, particularly in the shoot. Concentrations of Na+ and Cl-, but not of K+, increased with increasing stress severity. With the exception of proline, concentration of organic solutes was only marginally affected by salt stress. Catalase activity in leaves increased slightly as a result of salt stress, whereas guaiacol peroxidase activity was induced only under... Tipo: Info:eu-repo/semantics/article Palavras-chave: Anacardium occidentale; Antioxidant enzymes; Lipid peroxidation; Oxidative stress; Protein pattern; Salt stress. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000200003 Changes in growth variables and potassium content in leaves of Black Barley in response to NaCl Braz. J. Plant Physiol. Abu-Al-Basal,Mariam A.; Yasseen,Bassam T.. Much attention is being focused on the Black barley (Hordeum distichum L.) as a local cultivar offering good model for a cereal crop has traits of resistance to drought and salinity during vegetative growth stages. Although Black was sensitive to salt stress during germination, it developed gradual tolerance with age and proved very tolerant during growth and development stages. The data of study clearly revealed how this cultivar was superior over Arivat (Hordeum vulgare L.) in many physiological aspects such as leaf growth variables (i.e. rate and duration) and processes (i.e. cell division), tiller production and potassium content. Black barley had more tillers, faster rate and longer duration of growth processes which was accompanied with potassium... Tipo: Info:eu-repo/semantics/article Palavras-chave: Black barley; Hordeum distichum L.; Cell division; Growth rate; Growth duration; Leaf growth; Arivat; Hordeum vulgare L.; Potassium; Salt stress. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000400002 Influence of salinity on the development of the banana colonised by arbuscular mycorrhizal fungi Rev. Ciênc. Agron. Almeida,Aldênia Mendes Mascena de; Gomes,Vânia Felipe Freire; Mendes Filho,Paulo Furtado; Lacerda,Claudivan Feitosa de; Freitas,Emanuel Dias. ABSTRACT This study evaluated the effect of salt stress on the growth of banana seedling colonized with mycorrhizal fungi (AMF) on a substrate from a Quartzipsamment. The experiment was conducted in a greenhouse, using a completely randomized design in split plots; the plots had 5 levels of salinity in irrigation water (0.5, 1.5, 2.5, 3.5 and 4 5 dS m-1) and the subplots of four collection periods (40, 60, 80 and 100 days after transplanting), with 4 repetitions, totaling 80 experimental units. The seedlings of banana cv. "Prata" was produced by micropropagation and inoculated with arbuscular mycorrhizal and acclimatization for 40 days. Evaluations were made of leaf gas exchange, shoot dry mass, nutrient content, mycorrhizal root colonization and spore... Tipo: Info:eu-repo/semantics/article Palavras-chave: Musa ssp.; Arbuscular Mycorrhizal Fungi; Salt stress. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000300421 Increased Growth and Changes in Wheat Mineral Composition through Calcium Silicate Fertilization under Normal and Saline Field Conditions Chilean J. Agric. Res. Anser,Ali; Basra,Shahzad M.A; Hussain,Safdar; Iqbal,Javaid. ^len^les Tipo: Journal article Palavras-chave: Salt stress; Silicon; Wheat growth; K+:Na+; Water potential; Stomatal conductance. Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100016 Differential responses of ribulose-1,5-bisphosphate carboxylase/oxygenase activities of two Vigna unguiculata cultivars to salt stress Braz. J. Plant Physiol. Aragão,Maria Erivalda Farias de; Guedes,Marjorie Moreira; Otoch,Maria de Lourdes Oliveira; Guedes,Maria Izabel Florindo; Melo,Dirce Fernandes de; Lima,Maria da Guia Silva. Vita 3 and Vita 5 are two Vigna unguiculata cultivars that differ in their capacities for survival in saline environments; Vita 3 is more tolerant and Vita 5 more sensitive. Both cultivars were submitted to salt stress with 0.1 M NaCl. After 8 days, root and shoot growth from both cultivars was reduced but reduction was more pronounced in Vita 5. Furthermore, leaf area was also reduced in this cultivar. Chlorophyll content and chlorophyll fluorescence parameters were not affected by salt stress, but the specific activities of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) decreased in Vita 3 and increased in Vita 5. The use of immunological techniques also revealed that the Rubisco content from Vita 3 decreased while that of Vita 5 increased.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Rubisco; Photosynthesis; Salt stress; Vigna unguiculata. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000200003 Mechanisms of salt tolerance in seedlings of six woody native species of the Brazilian semi-arid Rev. Ciênc. Agron. Bessa,Michele Campos; Lacerda,Claudivan Feitosa; Amorim,Aiala Vieira; Bezerra,Antonio Marcos Esmeraldo; Lima,Alan Diniz. ABSTRACT The aim of this study was to evaluate the salt tolerance and physiological responses of six woody native species of the Caatinga ecosystem, on a soil salinity gradient in a greenhouse. The experimental design was of randomized blocks in a split-plot scheme; six plant species native of the Caatinga in the plots, and five levels of soil salinity in the sub-plots (1.2, 2.7, 4.7, 6.7 and 8.4 dS m-1), with five replications. The results demonstrate that species of the Caatinga ecosystem display a high capacity for adaptation in soils of low and moderate salinity. However, considering the reduction in total dry matter production at the highest salinity level, it was seen that only the species M. urundeuva was tolerant to salinity, and H. impetiginosus... Tipo: Info:eu-repo/semantics/article Palavras-chave: Salt stress; Caatinga ecosystem; Woody plants; Leaf gas exchange. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000100157 Physiology of cashew plants grown under adverse conditions Braz. J. Plant Physiol. Bezerra,Marlos A.; Lacerda,Claudivan F. de; Gomes Filho,Enéas; Abreu,Carlos E. B. de; Prisco,José T.. The cashew (Anacardium occidentale L.) is an important crop for semi-arid agriculture and contributes to the social and economical development of several world regions, including the northeast of Brazil. In spite of its importance, very few studies aim to understand the effects of abiotic stresses on the development and yield of the cashew. This review covers the research on cashew ecophysiology, with emphasis on the effects of water and salt stress on its development, mineral nutrition and gas exchange processes. The results presented here were obtained at different plant growth stages and under different environmental conditions of soil and climate. The ecophysiological significance of this information is also discussed. Tipo: Info:eu-repo/semantics/article Palavras-chave: Anacardium occidentale; Development; Salt stress; Water deficit. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000400012 Long term salinity stress in relation to lipid peroxidation, super oxide dismutase activity and proline content of salt-sensitive and salt-tolerant wheat cultivars Chilean J. Agric. Res. Borzouei,Azam; Kafi,Mohammad; Akbari-Ghogdi,Elahe; Mousavi-Shalmani,MirAhmad. Salinity is a widespread root medium problem limiting productivity of cereal crops worldwide. The ability of plants to tolerate salt is determined by multiple biochemical pathways that facilitate retention and/or acquisition of water, protect chloroplast functions, and maintain ion homeostasis. Therefore, the ability of salt-sensitive ('Tajan') and salt-tolerant cultivar ('Bam') of Triticum aestivum L. to adapt to a saline environment were evaluated in a set of greenhouse experiments under salt stress during three growth stages (tillering, 50% anthesis, and 10 d after anthesis). Plants were irrigated by different saline waters with electrical conductivities of 1.3, 6, 8, 10, and 12 dS m-1, which were obtained by adding NaCl:CaCl2 in 10:1 molar ratio to... Tipo: Journal article Palavras-chave: Triticum aestivum; Salt stress; NaCl; Malondialdehyde. Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000400003 ISOENZYMATIC POLYMORPHISM AND ACTIVITY OF PEROXIDASES OF COMMON BEAN (Phaseolus vulgaris L.) UNDER SALINE STRESS Scientia Agricola BROETTO,F.; CASA,A.M.; MALAVOLTA,E.; LOPES,C.R.. One of the uses of the technique of tissue culture for plant breeding is the identification of cell lines tolerant to salt stress.In order to study the biochemical mechanisms involved in the genetic expression to salt tolerance, callus from embryo axis of four bean cultivars (cv. IAC-carioca; cv. IAPAR-14; cv. JALO-EEP558; CV. BAT-93) were grown in Murashige & Skoog (1962) medium, supplemented with NaCl in the concentrations of 0, 20, 40, 60 and 80 mM. After 14 days callus were harvested and analyzed according to their isoenzymatic patterns and peroxidase activities. BAT and IAPAR cultivars showed two common activity zones in the anodic region, with only one specific enzymatic band to each one (the two fastest migration band); it is possible that... Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris; Peroxidases; Polymorphism; Salt stress; Phaseolus vulgaris. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161997000200003 Effect of environmental factors on the germination of Megathyrsus maximus: an invasive weed in sugarcane in Argentina Planta Daninha C. Cabrera,Debora; Sobrero,María T.; Pece,Marta; Chaila,Salvador. Abstract Background: Megathyrsus maximus (Jacq.) is a perennial weed that affects many crops. In Argentina, sugarcane is the most affected. Objective: Study effective techniques to break dormancy and the effect of environmental factors on the germination of this weed. Methods: Experiments were carried out in cabinet incubators twice, with five replicates per treatment. The experimental unit was made up for 50 seeds. Results: Seed dormancy was strongly associated with the presence of glumes. Manual extractions of glumes and immersion in sulphuric acid were the most effective techniques for breaking dormancy. Megathyrsus maximus did not depend on light to germinate, and it did so both under a 12 h-light-dark photoperiod and in complete darkness, with... Tipo: Info:eu-repo/semantics/article Palavras-chave: Megathyrsus maximus; Guinea grass; Scarification; Salt stress; Temperature; Osmotic stress; Dormancy. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100304 Gas exchange and organic solutes in forage sorghum genotypes grown under different salinity levels AGRIAMBI Coelho,Daniela S.; Simões,Welson L.; Salviano,Alessandra M.; Mesquita,Alessandro C.; Alberto,Keila da C.. ABSTRACT Adaptation of plants to saline environments depends on the activation of mechanisms that minimize the effects of excess ions on vital processes, such as photosynthesis. The objective of this study was to evaluate the leaf gas exchange, chlorophyll, and organic solute in ten genotypes of forage sorghum irrigated with solutions of different salinity levels. The experiment was conducted in a randomized block design, in a 10 x 6 factorial arrangement, with three replications, using ten genotypes - F305, BRS-655, BRS-610, Volumax, 1.015.045, 1.016.005, 1.016.009, 1.016.013, 1.016.015 and 1.016.031 - and six saline solutions, with electrical conductivity (ECw) of 0, 2.5, 5.0, 7.5, 10 and 12.5 dS m-1. The photosynthetic activity in forage sorghum plants... Tipo: Info:eu-repo/semantics/article Palavras-chave: Salt stress; Photosynthesis; Chlorophyll; Sorghum bicolor (L.) Moench. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000400231 Isolation and characterization of a promoter responsive to salt, osmotic and dehydration stresses in soybean Genet. Mol. Biol. Conforte,Alessandra Jordano; Guimarães-Dias,Fábia; Neves-Borges,Anna Cristina; Bencke-Malato,Marta; Felix-Whipps,Durvalina; Alves-Ferreira,Márcio. Abstract Drought stress is the main limiting factor of soybean yield. Currently, genetic engineering has been one important tool in the development of drought-tolerant cultivars. A widely used strategy is the fusion of genes that confer tolerance under the control of the CaMV35S constitutive promoter; however, stress-responsive promoters would constitute the best alternative to the generation of drought-tolerant crops. We characterized the promoter of α-galactosidase soybean (GlymaGAL) gene that was previously identified as highly up-regulated by drought stress. The β-glucuronidase (GUS) activity of Arabidopsis transgenic plants bearing 1000- and 2000-bp fragments of the GlymaGAL promoter fused to the uidA gene was evaluated under air-dried, polyethylene... Tipo: Info:eu-repo/semantics/article Palavras-chave: Α-galactosidase gene; Salt stress; Drought-tolerant soybean; Cis-acting element; Raffinose degradation pathway. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000200226 Hydrogen sulfide: a new endogenous player in an old mechanism of plant tolerance to high salinity Acta Botanica da-Silva,Cristiane J.; Modolo,Luzia V.. ABSTRACT High salinity affects plants due to stimulation of osmotic stress. Cell signaling triggered by nitric oxide (NO) and hydrogen sulfide (H2S) activates a cascade of biochemical events that culminate in plant tolerance to abiotic and biotic stresses. For instance, the NO/H2S-stimulated biochemical events that occur in plants during response to high salinity include the control of reactive oxygen species, activation of antioxidant system, accumulation of osmoprotectants in cytosol, induction of K+ uptake and Na+ cell extrusion or its vacuolar compartmentation among others. This review is a compilation of what we have learned in the last 10 years about NO participation during cell signaling in response to high salinity as well as the role of H2S, a new... Tipo: Info:eu-repo/semantics/article Palavras-chave: Abiotic stress; Cell signaling; Hydrogen sulfide; Nitric oxide; NO and H2S biosynthesis; Salt stress. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100150 Genetic and epigenetic effects of salinity on in vitro growth of barley Genet. Mol. Biol. Demirkiran,Aykut; Marakli,Sevgi; Temel,Aslihan; Gozukirmizi,Nermin. Morphological, physiological and molecular changes were investigated in in vitro salt-stressed barley (Hordeum vulgare L. cv. Tokak). Mature embryos were cultured in Murashige and Skoog medium containing 0 (control), 50 and 100 mM NaCl for 20 days. Both concentrations inhibited shoot growth, decreased fresh weight and protein content, and increased SOD (EC 1.15.1.1) activity in a dose-dependent manner. The lower concentration increased root growth. Salinity caused nucleotide variations in roots, but did not affect shoot DNAs. The higher concentration caused methylation changes, mainly hypermethylation in shoots. This is the first study on genetic and epigenetic effects of salinity in barley. Tipo: Info:eu-repo/semantics/article Palavras-chave: Hordeum vulgare; Salt stress; Tissue culture; RAPD; CRED-RA. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400016 Effects of n-propyl gallate on photosynthesis and physiological parameters in Dunaliella salina are affected by stressful conditions Braz. J. Plant Physiol. Einali,Alireza; Shariati,Mansour. We studied the effects of n-propyl gallate, which is a plastid terminal oxidase inhibitor involved in chlororespiration, on photosynthesis and physiological parameters in Dunaliella salina grown under different salinities and under low or high irradiance using chlorophyll a fluorescence transient measurements and pigment analysis. The inhibitor up to 1 mM had an additive significant effect on the photosynthetic efficiency in the cell suspensions grown under low salinity and irradiance. However, in the presence of high n-propyl gallate concentration (4 mM), there was a negative effect on all physiological aspects. In contrast, this high concentration of the inhibitor could enhance efficiency of electron transport and growth parameters under high irradiance.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chlorophyll fluorescence; Dunaliella salina; Light intensity; Photosynthesis; Salt stress. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000300006 Changes in physiological indicators associated with salt tolerance in two contrasting cashew rootstocks Braz. J. Plant Physiol. Ferreira-Silva,Sérgio L.; Silveira,Joaquim A.G.; Voigt,Eduardo L.; Soares,Lucilene S.P.; Viégas,Ricardo A.. In order to identify salt tolerance indicators, several physiological variables were evaluated in two contrasting cashew (Anacardium occidentale L.) rootstocks in response to salt stress. The tolerant CCP 09 genotype showed better growth performance after two weeks under a large range of NaCl salinity (50, 100, 150 and 200 mM). The NaCl treatments induced a significant drop in transpiration as a consequence of an increased stomatal resistance in both genotypes. No significant differences in Na+, Cl, and K+ concentrations were found in both roots and leaves regardless of rootstocks. The tolerant genotype exhibited lower relative water content and less negative leaf osmotic potential as compared with the sensitive genotype and, therefore, these variables... Tipo: Info:eu-repo/semantics/article Palavras-chave: Anacardium occidentale; Organic solutes; Salt stress; Salt tolerance; Sodium and chloride partitioning; Sodium-to-potassium ratio. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000100006 Crescimento e acúmulo de cátions em plantas de moringa mantidas em solos salinos PFB - Pesquisa Florestal Brasileira Freire, Antonio Lucineudo Oliveira; Miranda, José Romilson Paes de. Com o objetivo de avaliar os efeitos da salinidade no crescimento e acúmulo de massa seca e cátions em plantas jovens de moringa (Moringa oleifera), testaram-se quatro tipos de solos, nas condutividades elétricas (C.E.) 0,49 (controle), 4,15, 6,33 e 10,45 dS m-1. O experimento foi conduzido em delineamento inteiramente casualizado, com quatro repetições. As plantas cresceram inicialmente em tubetes rígidos e, aos 30 dias após a emergência, foram transferidas para vasos contendo 10 kg de solo, de acordo com o tratamento de salinidade. A salinidade prejudica o crescimento inicial das plantas e acúmulo de cátions na parte aérea e nas raízes das plantas. Na fase inicial de crescimento, as plantas de moringa não inibem a absorção de Na e sua translocação para a... Tipo: Info:eu-repo/semantics/article Palavras-chave: Moringa oleifera; Estresse salino; Tolerância à salinidade Moringa oleifera; Salt stress; Salt tolerance. Ano: 2012 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/315 Growth of cactus pear cv. Miúda under different salinity levels and irrigation frequencies Anais da ABC (AABC) FREIRE,JOELMA DE L.; SANTOS,MÉRCIA VIRGINIA F. DOS; DUBEUX JÚNIOR,JOSÉ CARLOS B.; BEZERRA NETO,EGÍDIO; LIRA,MÁRIO DE A.; CUNHA,MÁRCIO V. DA; SANTOS,DJALMA C. DOS; AMORIM,SILVANIA O. DE; MELLO,ALEXANDRE CARNEIRO L. DE. Abstract Soil and water salinity are considered the main limiting factors of plant production. This work aimed to evaluate the influences of irrigation frequency and soil salinity on the development of cactus pear cv. Miúda (Nopalea cochenillifera Salm Dyck). The experiment was conducted in factorial arrangement of four salinity levels: 0.3 (control), 0.5 (low), 1.5 (medium) and 3.6 (high salinity) (ds m-1), associated with four irrigation frequencies (each 7, 14, 21 and 28 days) and two soil textures (sandy and sandy loam) in a randomized block design with four replicates. One cladode was planted in each polyethylene pot containing 10 kg of soil. The soil texture influenced some of the morphological characteristics of the cactus pear, so that plants grown... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cladodes; Forage; Salt stress; Semiarid. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703893 Emergence and biomass accumulation in seedlings of rice cultivars irrigated with saline water AGRIAMBI Freire,Márcio H. da C.; Sousa,Geocleber G. de; Souza,Maria V. P. de; Ceita,Emanuel D. R. de; Fiusa,Jamili N.; Leite,Kelly N.. ABSTRACT The objective of this study was to evaluate the performance of three rice cultivars under saline water irrigation. The experiment was carried out in full sun at the Experimental Farm of the Unilab, in Redenção, Ceará, Brazil, in January 2016. The experimental design was completely randomized (CRD), in a 5 x 3 factorial scheme [irrigation water electrical conductivity (ECw: 0.5, 1.0, 2.0, 3.0 and 4.0 dS m-1) versus three rice cultivars (C1 - Ligeirinho, C2 - Casado and C3 - Meruinho)], totaling 15 treatments, with 4 replicates of 30 seeds per cultivar. After 21 days, the following variables were evaluated: emergence percentage (EP), emergence speed index (ESI), mean time of emergence (MTE), mean speed of emergence (MSE), shoot dry matter (SDM),... Tipo: Info:eu-repo/semantics/article Palavras-chave: Oryza sativa L.; Emergence; Salt stress. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000700471 Registros recuperados: 80 Primeira ... 1 2 3 4 ... Última

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