Base de dados : MEDLINE Pesquisa : G02.640.500 [Categoria DeCS] Referências encontradas : 5235 [refinar] Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 524

ir para página

1 / 5235

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 28841529 [Au] Autor: Ghelichpour M; Taheri Mirghaed A; Mirzargar SS; Joshaghani H; Ebrahimzadeh Mousavi H [Ad] Endereço: Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran. [Ti] Título: Modification of saltwater stress response in Cyprinus carpio (Linnaeus, 1758) pre-exposed to pesticide indoxacarb. [So] Source: Ecotoxicol Environ Saf;147:139-143, 2018 Jan. [Is] ISSN: 1090-2414 [Cp] País de publicação: Netherlands [La] Idioma: eng [Ab] Resumo: To evaluate the effects of indoxacarb on saltwater stress response in Cyprinus carpio, the fish were pre-exposed to indoxacarb (0, 0.75, 1.5 and 3mg/L denoted as CP, 0.75IT, 1.5IT and 3IT, respectively) for 21 days and then released to saltwater. A negative control (CN) group was included (the fish were held in indoxacarb-free water for the entire experiment). The fish were sampled immediately (0h) and 24, 48 and 72h after the salinity exposure for the analysis of plasma cortisol, glucose and sodium, chloride, potassium and calcium levels. All fish pre-exposed to 3mg/L indoxacarb, died after the first day of salinity challenge. CP showed typical cortisol response after the salinity challenge, but, cortisol response of the fish pre-exposed to indoxacarb (0.75IT and 1.5IT) was blocked. Plasma glucose increased significantly in all groups compared to the CN; however, this elevation had no consistent trend in 0.75IT and 1.5IT which indicated interference in glucose response due to indoxacarb exposure. Plasma sodium increased (compared to CN) in all groups after the salinity challenge. However, elevation in plasma chloride and potassium was significantly different among the groups and the indoxacarb-treated fish showed slightly sooner ionic disturbance. The results clearly indicate that indoxacarb impairs stress response of C. carpio and the fish may not be able to respond normally to additional stressors, which threatens their survival. [Mh] Termos MeSH primário: Carpas/metabolismo Hidrocortisona/sangue Osmorregulação/efeitos dos fármacos Oxazinas/toxicidade Praguicidas/toxicidade Poluentes Químicos da Água/toxicidade [Mh] Termos MeSH secundário: Animais Carpas/sangue Cloretos/sangue Relação Dose-Resposta a Droga Potássio/sangue Salinidade Sódio/sangue [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Chlorides); 0 (Oxazines); 0 (Pesticides); 0 (Water Pollutants, Chemical); 52H0D26MWR (indoxacarb); 9NEZ333N27 (Sodium); RWP5GA015D (Potassium); WI4X0X7BPJ (Hydrocortisone) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180309 [Lr] Data última revisão: 180309 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170826 [St] Status: MEDLINE

2 / 5235

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 28841528 [Au] Autor: Lavtizar V; Kimura D; Asaoka S; Okamura H [Ad] Endereço: Laboratory of Maritime Environmental Management, Research Center for Inland Seas, Kobe University, 5-1-1 Fukaeminami, Higashinada-ku, Kobe, Hyogo 658-0022, Japan. [Ti] Título: The influence of seawater properties on toxicity of copper pyrithione and its degradation product to brine shrimp Artemia salina. [So] Source: Ecotoxicol Environ Saf;147:132-138, 2018 Jan. [Is] ISSN: 1090-2414 [Cp] País de publicação: Netherlands [La] Idioma: eng [Ab] Resumo: Copper pyrithione (CuPT) is a biocide, used worldwide to prevent biofouling on submerged surfaces. In aquatic environments it rapidly degrades, however, one of the degradation products (HPT) is known to react with cupric ion back to its parent compound. Not much is known about the behavior and toxicity of CuPT and its degradation product HPT in different water systems. Hence, our aim was to investigate the ecotoxicity of CuPT, HPT as well as Cu to the brine shrimp Artemia salina in natural seawater and organic matter-free artificial seawater. Moreover, in order to elucidate the influence of ionic strength of water on CuPT toxicity, tests were performed in water media with modified salinity. The results showed that CuPT was the most toxic to the exposed crustaceans in a seawater media with the highest salinity and with no organic matter content. HPT in a presence of cupric ion converted to CuPT, but the measured CuPT concentrations and the mortality of A. salina in natural water were lower than in artificial water. The toxicity of CuPT to A. salina was significantly influenced by the organic matter content, salinity, and proportions of constituent salts in water. In a combination with cupric ion, non-hazardous degradation product HPT exhibits increased toxicity due to its rapid transformation to its parent compound. [Mh] Termos MeSH primário: Artemia/efeitos dos fármacos Desinfetantes/toxicidade Compostos Organometálicos/toxicidade Piridinas/toxicidade Água do Mar/química Tionas/toxicidade Poluentes Químicos da Água/toxicidade [Mh] Termos MeSH secundário: Animais Desinfetantes/análise Monitoramento Ambiental/métodos Substâncias Húmicas/análise Compostos Organometálicos/análise Piridinas/análise Salinidade Tionas/análise Poluentes Químicos da Água/análise [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Disinfectants); 0 (Humic Substances); 0 (Organometallic Compounds); 0 (Pyridines); 0 (Thiones); 0 (Water Pollutants, Chemical); 0 (copper pyrithione); 6GK82EC25D (pyrithione) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180309 [Lr] Data última revisão: 180309 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170826 [St] Status: MEDLINE

3 / 5235

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 29458666 [Au] Autor: Yang ZW; Salam N; Asem MD; Fang BZ; Lan L; Xiao M; Wadaan MAM; Hozzein WN; Li WJ [Ad] Endereço: 1​State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, PR China. [Ti] Título: Saccharopolyspora deserti sp. nov., a novel halotolerant actinobacterium isolated from a desert. [So] Source: Int J Syst Evol Microbiol;68(3):860-864, 2018 Mar. [Is] ISSN: 1466-5034 [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: Strain SYSU D8010 was isolated from a desert sand sample collected in Saudi Arabia. The taxonomic position of the isolate was investigated by the polyphasic taxonomic approach. The isolate was found to be Gram-positive and aerobic. The strain was able to grow at 14-40 °C, pH 5.0-9.0 and in the presence of up to 22 % (w/v) NaCl. Strain SYSU D8010 contained meso-diaminopimelic acid as cell-wall diamino acid, and arabinose, fucose, galactose, glucose and rhamnose as the whole-cell sugars. The primary polar lipids were diphosphatidylglycerol, phosphatidylcholine, phosphatidylglycerol, phosphatidylinositol and phosphatidylinositolmannosides. Menaquinone MK-9(H4) was detected as the respiratory quinone; and anteiso-C17 : 0, iso-C16 : 0, iso-C15 : 0 and iso-C17 : 0 as the predominant fatty acids. Pairwise comparison of the 16S rRNA gene sequences indicated that strain SYSU D8010 had a sequence similarity of 97.8 % to Saccharopolyspora halophila YIM 90500 . The genomic DNA G+C content of strain SYSU D8010 was determined to be 69.9 mol%. Based on the analyses of the phenotypic, genotypic and phylogenetic characteristics, strain SYSU D8010 was determined to represent a novel species of the genus Saccharopolyspora, for which the name Saccharopolyspora deserti sp. nov. is proposed. The type strain of the species is SYSU D8010 (=KCTC 39989 =CPCC 204620 ). [Mh] Termos MeSH primário: Clima Desértico Filogenia Saccharopolyspora/classificação Salinidade [Mh] Termos MeSH secundário: Técnicas de Tipagem Bacteriana Composição de Bases DNA Bacteriano/genética Ácido Diaminopimélico/química Ácidos Graxos/química Fosfolipídeos/química RNA Ribossômico 16S/genética Saccharopolyspora/genética Saccharopolyspora/isolamento & purificação Arábia Saudita Análise de Sequência de DNA Vitamina K 2/análogos & derivados Vitamina K 2/química [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Phospholipids); 0 (RNA, Ribosomal, 16S); 11032-49-8 (Vitamin K 2); 523-39-7 (menaquinone 9); 583-93-7 (Diaminopimelic Acid) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180308 [Lr] Data última revisão: 180308 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180221 [St] Status: MEDLINE [do] DOI: 10.1099/ijsem.0.002598

4 / 5235

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 29458475 [Au] Autor: Gan L; Zhang H; Long X; Tian J; Wang Z; Zhang Y; Dai Y; Tian Y [Ad] Endereço: 1​Key Laboratory of Leather Chemistry and Engineering, Ministry of Education and College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, PR China. [Ti] Título: Ornithinibacillus salinisoli sp. nov., a moderately halophilic bacterium isolated from a saline-alkali soil. [So] Source: Int J Syst Evol Microbiol;68(3):769-775, 2018 Mar. [Is] ISSN: 1466-5034 [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: A taxonomic study was performed on strain LCB256 , which was isolated from a saline-alkali soil sample taken from northwestern China. Cells of strain LCB256 were Gram-stain-positive, aerobic, rod-shaped and grew at 3-17 % (w/v) NaCl (optimum 10-15 %), 10-52 °C (optimum 25-30 °C) and pH 7.0-9.0 (optimum 8.0). Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain LCB256 was most closely related to the two genera of Ornithinibacillus and Oceanobacillus, showing highest sequence similarity to Oceanobacillus limi KCTC 13823 (97.8 %) and Ornithinibacillus bavariensis WSBC 24001 (97.2 %). The peptidoglycan amino acid type was found to be A4ß and the major respiratory quinone was determined to be MK-7. The polar lipid profile of strain LCB256 contained diphosphatidylglycerol, phosphatidylglycerol, one unidentified phospholipid and two unidentified aminolipids. The dominant cellular fatty acids were anteiso-C15 : 0 and iso-C15 : 0. The G+C content of genomic DNA was 39.3 mol%. DNA-DNA relatedness values between strain LCB256 and Ornithinibacillus halophilus KCTC 13822 and Oceanobacillus limi KCTC 13823 were 46.2 and 34.8 %, respectively. Based on this polyphasic taxonomic study, a novel species of the genus Ornithinibacillus, Ornithinibacillussalinisoli sp. nov. is proposed. The type strain is LCB256 (=CGMCC 1.15809 =KCTC 33862 ). [Mh] Termos MeSH primário: Bacillaceae/classificação Filogenia Microbiologia do Solo [Mh] Termos MeSH secundário: Álcalis Bacillaceae/genética Bacillaceae/isolamento & purificação Técnicas de Tipagem Bacteriana Composição de Bases China DNA Bacteriano/genética Ácidos Graxos/química Hibridização de Ácido Nucleico Peptidoglicano/química Fosfolipídeos/química RNA Ribossômico 16S/genética Salinidade Análise de Sequência de DNA Vitamina K 2/análogos & derivados Vitamina K 2/química [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Alkalies); 0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Peptidoglycan); 0 (Phospholipids); 0 (RNA, Ribosomal, 16S); 11032-49-8 (Vitamin K 2); 8427BML8NY (vitamin MK 7) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180308 [Lr] Data última revisão: 180308 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180221 [St] Status: MEDLINE [do] DOI: 10.1099/ijsem.0.002580

5 / 5235

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 29458461 [Au] Autor: Ben Ali Gam Z; Thioye A; Cayol JL; Joseph M; Fauque G; Labat M [Ad] Endereço: 1​Laboratoire de Microbiologie IRD, Aix-Marseille Université, Université du Sud Toulon-Var, CNRS/INSU, IRD, MI0 UM110, 163 avenue de Luminy, case 925, F-13288 Marseille cedex 9, France. [Ti] Título: Characterization of Desulfovibrio salinus sp. nov., a slightly halophilic sulfate-reducing bacterium isolated from a saline lake in Tunisia. [So] Source: Int J Syst Evol Microbiol;68(3):715-720, 2018 Mar. [Is] ISSN: 1466-5034 [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: A novel slightly halophilic sulfate-reducing bacterium, designated strain P1BSR , was isolated from water of a saline lake in Tunisia. Strain P1BSR had motile (single polar flagellum), Gram-negative, rod-shaped, non-spore-forming cells, occurring singly or in pairs. Strain P1BSR grew at temperatures between 15 and 45 °C (optimum 40 °C), and in a pH range between 6 and 8.5 (optimum pH 6.7). The strain required NaCl for growth (1 % w/v), and tolerated high NaCl concentration (up to 12 % w/v) with an optimum of 3 % (w/v). Sulfate, thiosulfate and sulfite served as terminal electron acceptors, but not elemental sulfur, fumarate, nitrate and nitrite. Strain P1BSR utilized lactate, pyruvate, formate, d-fructose and glycerol as carbon and energy sources. The main cellular fatty acid was C16 : 0 (50.8 %). The genomic DNA G+C content was 47.7 mol%. Phylogenetic analysis of 16S rRNA gene sequence similarity indicated that strain P1BSR was affiliated to the genus Desulfovibrio, with the type strains Desulfovibrio salexigens (96.51 %), Desulfovibrio zosterae (95.68 %), Desulfovibrio hydrothermalis (94.81 %) and Desulfovibrio ferrireducens (94.73 %) as its closest phylogenetic relatives. On the basis of genotypic, phenotypic and phylogenetic characteristics, it is proposed to assign strain P1BSR to a novel species of the genus Desulfovibrio, Desulfovibrio salinus sp. nov. The type strain is P1BSR (=DSM 101510 =JCM 31065 ). [Mh] Termos MeSH primário: Desulfovibrio/classificação Lagos/microbiologia Filogenia Salinidade [Mh] Termos MeSH secundário: Técnicas de Tipagem Bacteriana Composição de Bases DNA Bacteriano/genética Desulfovibrio/genética Desulfovibrio/isolamento & purificação Ácidos Graxos/química Oxirredução RNA Ribossômico 16S/genética Análise de Sequência de DNA Sulfatos/metabolismo Tunísia [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (DNA, Bacterial); 0 (Fatty Acids); 0 (RNA, Ribosomal, 16S); 0 (Sulfates) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180308 [Lr] Data última revisão: 180308 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180221 [St] Status: MEDLINE [do] DOI: 10.1099/ijsem.0.002567

6 / 5235

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 28968941 [Au] Autor: Etesami H; Jeong BR [Ad] Endereço: Department of Soil Science, Faculty of Agricultural Engineering and Technology, University College of Agriculture and Natural Resources, University of Tehran, 31587-77871 Iran. Electronic address: hassanetesami@ut.ac.ir. [Ti] Título: Silicon (Si): Review and future prospects on the action mechanisms in alleviating biotic and abiotic stresses in plants. [So] Source: Ecotoxicol Environ Saf;147:881-896, 2018 Jan. [Is] ISSN: 1090-2414 [Cp] País de publicação: Netherlands [La] Idioma: eng [Ab] Resumo: In the era present, due to increasing incidences of a large number of different biotic and abiotic stresses all over the world, the growth of plants (principal crops) may be restrained by these stresses. In addition to beneficial microorganisms, use of silicon (Si)-fertilizer is known as an ecologically compatible and environmentally friendly technique to stimulate plant growth, alleviate various biotic and abiotic stresses in plants, and enhance the plant resistance to multiple stresses, because Si is not harmful, corrosive, and polluting to plants when presents in excess. Here, we reviewed the action mechanisms by which Si alleviates abiotic and biotic stresses in plants. The use of Si (mostly as industrial slags and rice straw) is predicted to become a sustainable strategy and an emerging trend in agriculture to enhance crop growth and alleviate abiotic and biotic stresses in the not too distant future. In this review article, the future research needs on the use of Si under the conditions of abiotic and biotic stresses are also highlighted. [Mh] Termos MeSH primário: Produtos Agrícolas/efeitos dos fármacos Fertilizantes Desenvolvimento Vegetal/efeitos dos fármacos Silício/farmacologia Solo Estresse Fisiológico/efeitos dos fármacos [Mh] Termos MeSH secundário: Produtos Agrícolas/crescimento & desenvolvimento Produtos Agrícolas/metabolismo Secas Salinidade Solo/química Solo/normas [Pt] Tipo de publicação: JOURNAL ARTICLE; REVIEW [Nm] Nome de substância: 0 (Fertilizers); 0 (Soil); Z4152N8IUI (Silicon) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180308 [Lr] Data última revisão: 180308 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 171004 [St] Status: MEDLINE

7 / 5235

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 28968938 [Au] Autor: Rotini A; Gallo A; Parlapiano I; Berducci MT; Boni R; Tosti E; Prato E; Maggi C; Cicero AM; Migliore L; Manfra L [Ad] Endereço: Department of Biology, University Tor Vergata, Rome, Italy; Institute for Environmental Protection and Research (ISPRA), Rome, Italy. [Ti] Título: Insights into the CuO nanoparticle ecotoxicity with suitable marine model species. [So] Source: Ecotoxicol Environ Saf;147:852-860, 2018 Jan. [Is] ISSN: 1090-2414 [Cp] País de publicação: Netherlands [La] Idioma: eng [Ab] Resumo: Metal oxide nanoparticles, among them copper oxide nanoparticles (CuO NPs), are widely used in different applications (e.g. batteries, gas sensors, superconductors, plastics and metallic coatings), increasing their potential release in the environment. In aquatic matrix, the behavior of CuO NPs may strongly change, depending on their surface charge and some physical-chemical characteristics of the medium (e.g. ionic strength, salinity, pH and natural organic matter content). Ecotoxicity of CuO NPs to aquatic organisms was mainly studied on freshwater species, few tests being performed on marine biota. The aim of this study was to assess the toxicity of CuO NPs on suitable indicator species, belonging to the ecologically relevant level of consumers. The selected bioassays use reference protocols to identify Effect/Lethal Concentrations (E(L)C), by assessing lethal and sub-lethal endpoints. Mortality tests were performed on rotifer (Brachionus plicatilis), shrimp (Artemia franciscana) and copepod (Tigriopus fulvus). While moult release failure and fertilization rate were studied, as sub-lethal endpoints, on T. fulvus and sea urchin (Paracentrotus lividus), respectively. The size distribution and sedimentation rates of CuO NPs, together with the copper dissolution, were also analyzed in the exposure media. The CuO NP ecotoxicity assessment showed a concentration-dependent response for all species, indicating similar mortality for B. plicatilis (48hLC = 16.94 ± 2.68mg/l) and T. fulvus (96hLC = 12.35 ± 0.48mg/l), followed by A. franciscana (48hLC = 64.55 ± 3.54mg/l). Comparable EC values were also obtained for the sub-lethal endpoints in P. lividus (EC = 2.28 ± 0.06mg/l) and T. fulvus (EC = 2.38 ± 0.20mg/l). Copper salts showed higher toxicity than CuO NPs for all species, with common sensitivity trend as follows: P. lividus ≥ T. fulvus (sublethal endpoint) ≥ B. plicatilis >T. fulvus (lethal endpoint) >A. franciscana. CuO NP micrometric aggregates and high sedimentation rates were observed in the exposure media, with different particle size distributions depending on the medium. The copper dissolution was about 0.16% of the initial concentration, comparable to literature values. The integrated ecotoxicological-physicochemical approach was used to better describe CuO NP toxicity and behavior. In particular, the successful application of ecotoxicological reference protocols allowed to produce reliable L(E)C data useful to identify thresholds and assess potential environmental hazard due to NPs. [Mh] Termos MeSH primário: Organismos Aquáticos/efeitos dos fármacos Cobre/toxicidade Nanopartículas Metálicas/toxicidade Poluentes Químicos da Água/toxicidade [Mh] Termos MeSH secundário: Animais Ecotoxicologia Água Doce Modelos Animais Tamanho da Partícula Salinidade Especificidade da Espécie Propriedades de Superfície [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Water Pollutants, Chemical); 789U1901C5 (Copper); V1XJQ704R4 (cupric oxide) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180308 [Lr] Data última revisão: 180308 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 171004 [St] Status: MEDLINE

8 / 5235

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 28968923 [Au] Autor: Filipovic L; Romic M; Romic D; Filipovic V; Ondrasek G [Ad] Endereço: University of Zagreb Faculty of Agriculture, Department of Soil Amelioration, Svetosimunska 2510000 Zagreb, Croatia. Electronic address: lfilipovic@agr.hr. [Ti] Título: Organic matter and salinity modify cadmium soil (phyto)availability. [So] Source: Ecotoxicol Environ Saf;147:824-831, 2018 Jan. [Is] ISSN: 1090-2414 [Cp] País de publicação: Netherlands [La] Idioma: eng [Ab] Resumo: Although Cd availability depends on its total concentration in soil, it is ultimately defined by the processes which control its mobility, transformations and soil solution speciation. Cd mobility between different soil fractions can be significantly affected by certain pedovariables such as soil organic matter (SOM; over formation of metal-organic complexes) and/or soil salinity (over formation of metal-inorganic complexes). Phytoavailable Cd fraction may be described as the proportion of the available Cd in soil which is actually accessible by roots and available for plant uptake. Therefore, in a greenhouse pot experiment Cd availability was observed in the rhizosphere of faba bean exposed to different levels of SOM, NaCl salinity (50 and 100mM) and Cd contamination (5 and 10mgkg ). Cd availability in soil does not linearly follow its total concentration. Still, increasing soil Cd concentration may lead to increased Cd phytoavailability if the proportion of Cd pool in soil solution is enhanced. Reduced Cd (phyto)availability by raised SOM was found, along with increased proportion of Cd-DOC complexes in soil solution. Data suggest decreased Cd soil (phyto)availability with the application of salts. NaCl salinity affected Cd speciation in soil solution by promoting the formation of CdCl complexes. Results possibly suggest that increased Cd mobility in soil does not result in its increased availability if soil adsorption capacity for Cd has not been exceeded. Accordingly, chloro-complex possibly operated just as a Cd carrier between different soil fractions and resulted only in transfer between solid phases and not in increased (phyto)availability. [Mh] Termos MeSH primário: Cádmio/análise Substâncias Húmicas/análise Salinidade Poluentes do Solo/análise Solo/química [Mh] Termos MeSH secundário: Disponibilidade Biológica Croácia Modelos Teóricos Raízes de Plantas/química Rizosfera Cloreto de Sódio/análise Vicia faba/química [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Humic Substances); 0 (Soil); 0 (Soil Pollutants); 00BH33GNGH (Cadmium); 451W47IQ8X (Sodium Chloride) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180308 [Lr] Data última revisão: 180308 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 171004 [St] Status: MEDLINE

9 / 5235

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 28826029 [Au] Autor: Masondo NA; Kulkarni MG; Finnie JF; Van Staden J [Ad] Endereço: Research Centre for Plant Growth and Development, School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa. [Ti] Título: Influence of biostimulants-seed-priming on Ceratotheca triloba germination and seedling growth under low temperatures, low osmotic potential and salinity stress. [So] Source: Ecotoxicol Environ Saf;147:43-48, 2018 Jan. [Is] ISSN: 1090-2414 [Cp] País de publicação: Netherlands [La] Idioma: eng [Ab] Resumo: Extreme temperatures, drought and salinity stress adversely affect seed germination and seedling growth in crop species. Seed priming has been recognized as an indispensable technique in the production of stress-tolerant plants. Seed priming increases seed water content, improves protein synthesis using mRNA and DNA and repair mitochondria in seeds prior to germination. The current study aimed to determine the role of biostimulants-seed-priming during germination and seedling growth of Ceratotheca triloba (Bernh.) Hook.f. (an indigenous African leafy vegetable) under low temperature, low osmotic potential and salinity stress conditions. Ceratotheca triloba seeds were primed with biostimulants [smoke-water (SW), synthesized smoke-compound karrikinolide (KAR ), Kelpak (commercial seaweed extract), phloroglucinol (PG) and distilled water (control)] for 48h at 25°C. Thereafter, primed seeds were germinated at low temperatures, low osmotic potential and high NaCl concentrations. Low temperature (10°C) completely inhibited seed germination. However, temperature shift to 15°C improved germination. Smoke-water and KAR enhanced seed germination with SW improving seedling growth under different stress conditions. Furthermore, priming seeds with Kelpak stimulated percentage germination, while PG and the control treatment improved seedling growth at different PEG and NaCl concentrations. Generally, high concentrations of PEG and NaCl brought about detrimental effects on seed germination and seedling growth. Findings from this study show the potential role of seed priming with biostimulants in the alleviation of abiotic stress conditions during seed germination and seedling growth in C. triloba plants. [Mh] Termos MeSH primário: Furanos/farmacologia Germinação/efeitos dos fármacos Pedaliaceae/efeitos dos fármacos Piranos/farmacologia Plântulas/efeitos dos fármacos Sementes/efeitos dos fármacos Estresse Fisiológico/efeitos dos fármacos [Mh] Termos MeSH secundário: Temperatura Baixa Secas Osmose Pedaliaceae/crescimento & desenvolvimento Salinidade Plântulas/crescimento & desenvolvimento África do Sul [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Furans); 0 (Pyrans); 0 (karrikinolide) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180308 [Lr] Data última revisão: 180308 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170822 [St] Status: MEDLINE

10 / 5235

MEDLINE

seleciona para imprimir Fotocópia Texto completo

[PMID]: 28741669 [Au] Autor: Che-Othman MH; Millar AH; Taylor NL [Ad] Endereço: ARC Centre of Excellence in Plant Energy Biology, School of Molecular Sciences, The University of Western Australia, Crawley, Western Australia, WA 6009, Australia. [Ti] Título: Connecting salt stress signalling pathways with salinity-induced changes in mitochondrial metabolic processes in C3 plants. [So] Source: Plant Cell Environ;40(12):2875-2905, 2017 Dec. [Is] ISSN: 1365-3040 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: Salinity exerts a severe detrimental effect on crop yields globally. Growth of plants in saline soils results in physiological stress, which disrupts the essential biochemical processes of respiration, photosynthesis, and transpiration. Understanding the molecular responses of plants exposed to salinity stress can inform future strategies to reduce agricultural losses due to salinity; however, it is imperative that signalling and functional response processes are connected to tailor these strategies. Previous research has revealed the important role that plant mitochondria play in the salinity response of plants. Review of this literature shows that 2 biochemical processes required for respiratory function are affected under salinity stress: the tricarboxylic acid cycle and the transport of metabolites across the inner mitochondrial membrane. However, the mechanisms by which components of these processes are affected or react to salinity stress are still far from understood. Here, we examine recent findings on the signal transduction pathways that lead to adaptive responses of plants to salinity and discuss how they can be involved in and be affected by modulation of the machinery of energy metabolism with attention to the role of the tricarboxylic acid cycle enzymes and mitochondrial membrane transporters in this process. [Mh] Termos MeSH primário: Mitocôndrias/metabolismo Oxigênio/metabolismo Plantas/metabolismo Transdução de Sinais Estresse Fisiológico [Mh] Termos MeSH secundário: Fotossíntese/fisiologia Transpiração Vegetal/fisiologia Salinidade [Pt] Tipo de publicação: JOURNAL ARTICLE; REVIEW [Nm] Nome de substância: S88TT14065 (Oxygen) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180305 [Lr] Data última revisão: 180305 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170726 [St] Status: MEDLINE [do] DOI: 10.1111/pce.13034

---

página 1 de 524

ir para página

Refinar a pesquisa

Base de dados : MEDLINE

Formulário avançado

		Pesquisar	no campo
1			PalavrasDescritor de assuntoDescritor de assunto primárioLimitesAutorPalavras do títuloPalavras do resumoIdiomaPaís de publicaçãoNome de substânciaNome de pessoa como assuntoRevistaAssunto de RevistaISSNTipo de publicaçãoIdentificador únicoMês de entradaAno de publicaçãoTexto completoAtualização por classeCategoria DeCSCategoria DeCS explodidaCategoria CID-10SubSetsPais de AfiliaçãoAfiliaçãoAfiliação 2
2	and or and not		PalavrasDescritor de assuntoDescritor de assunto primárioLimitesAutorPalavras do títuloPalavras do resumoIdiomaPaís de publicaçãoNome de substânciaNome de pessoa como assuntoRevistaAssunto de RevistaISSNTipo de publicaçãoIdentificador únicoMês de entradaAno de publicaçãoTexto completoAtualização por classeCategoria DeCSCategoria DeCS explodidaCategoria CID-10SubSetsPais de AfiliaçãoAfiliaçãoAfiliação 2
3	and or and not		PalavrasDescritor de assuntoDescritor de assunto primárioLimitesAutorPalavras do títuloPalavras do resumoIdiomaPaís de publicaçãoNome de substânciaNome de pessoa como assuntoRevistaAssunto de RevistaISSNTipo de publicaçãoIdentificador únicoMês de entradaAno de publicaçãoTexto completoAtualização por classeCategoria DeCSCategoria DeCS explodidaCategoria CID-10SubSetsPais de AfiliaçãoAfiliaçãoAfiliação 2

Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde