排序方式: 共有9条查询结果,搜索用时 250 毫秒
1
1.
Majida Lahrouni Khalid Oufdou Fatima El Khalloufi Mohamed Baz Alejandro Lafuente Mohammed Dary Eloisa Pajuelo Brahim Oudra 《Environmental science and pollution research international》2013,20(8):5405-5415
The presence of cyanotoxins, mainly microcystins (MCs), in surface freshwater represents a serious health risk to aquatic organisms living in the water body, as well as terrestrial animals and plants that are in contact with contaminated water. Consequently, the use of MCs contaminated water for irrigation represents a hazard for cultivated plants and could induce severe economical losses due to crops’ yield reduction. The experimental approach undertaken in this work was exposing Vicia faba seedlings (inoculated with a Rhizobium strain resistant to MCs), to water supplemented with cyanobacterial crude extract containing total microcystins at a concentration of 50 and 100 μg/L (environmental relevant concentrations of MCs dissolved in the raw irrigation water from Lalla Takerkoust Lake-Marrakesh region). After chronic MCs exposure (2 months), biological and physiological parameters (plant growth, nitrogen uptake, mineral assimilation, and oxidative defense mechanisms) were evaluated. The results obtained showed evidence that chronic exposure to cyanobacterial bloom extract containing MCs strongly affected the physiological and biological plants activities; reduction of dry matter, photosynthetic activity, nodule number, and nitrogen assimilation. At the same time, an increase of oxidative stress was observed, as deduced from a significant increase of the activities of peroxidase, catalase, polyphenoloxidase, and phenylalanine ammonia lyase in leaves, roots, and nodules of faba bean plants exposed to cyanotoxins, especially at 100 μg/L of MCs. This experimentation constitutes a simulation of the situation related to cyanotoxins chronic exposure of seedlings—plants via the contaminated irrigation water. For this reason, once should take into consideration the possibility of contamination of agricultural crops and the quality of irrigation water should be by the way monitored for cyanotoxins biohazard. 相似文献
2.
Anas Raklami Abdel-ilah Tahiri Noura Bechtaoui El Gharmali Abdelhay Eloisa Pajuelo Marouane Baslam Abdelilah Meddich Khalid Oufdou 《环境科学学报(英文版)》2021,33(1):210-221
Assisted natural remediation (ANR) has been highlighted as a promising, less expensive, and environmentally friendly solution to remediate soil contaminated with heavy metals. We tested the effects of three amendments (10% compost, C; 5 or 15% phosphate sludge, PS5 and PS15; and 5 or 15% marble waste, MW5 and MW15) in combination with microorganism inoculation (rhizobacteria consortium alone, mycorrhizae alone, and the two in-combination) on alfalfa in contaminated soil. Plant concentrations of Zn, Cu, and Pb were measured, along with proline and malondialdehyde production. The microbiological and physicochemical properties of the mining soil were evaluated. Application of the amendments allowed germination and promoted growth. Inoculation with the rhizobacteria consortium and/or mycorrhizae stimulated plant growth. PS and MW stimulated the production of proline. Inoculation of alfalfa with the rhizobacteria-mycorrhizae mixture and the application of MW allowed the safe cultivation of the legume, as shown by the low concentrations of metals in plant shoots. Zn and Pb concentrations were below the limits recommended for animal grazing and accumulated essentially in roots. Soil analyses showed the positive effect of the amendments on the soil physicochemical properties. All treatments increased soil pH (around 7), total organic carbon, and assimilable phosphorus content. Notably, an important decrease in soluble heavy metals concentrations was observed. Overall, our findings revealed that the applied treatments reduced the risk of metal-polluted soils limiting plant growth. The ANR has great potential for success in the restoration of polymetallic and acidic mining soils using the interaction between alfalfa, microorganisms, and organo-mineral amendments. 相似文献
3.
4.
Pérez-Palacios Patricia Romero-Aguilar Asunción Delgadillo Julián Doukkali Bouchra Caviedes Miguel A. Rodríguez-Llorente Ignacio D. Pajuelo Eloísa 《Environmental science and pollution research international》2017,24(17):14910-14923
Environmental Science and Pollution Research - Excess copper (Cu) in soils has deleterious effects on plant growth and can pose a risk to human health. In the last decade, legume-rhizobium... 相似文献
5.
6.
Mariela Pajuelo Karen A. Bjorndal Kimberly J. Reich Michael D. Arendt Alan B. Bolten 《Marine Biology》2012,159(6):1255-1267
Most studies on the foraging ecology of loggerhead turtles (Caretta caretta) have focused on adult females and juveniles. Little is known about the foraging patterns of adult male loggerheads. We analyzed
tissues for carbon and nitrogen stable isotopes (δ13C and δ15N) from 29 adult male loggerheads tracked with satellite transmitters from one breeding area in Florida, USA, to evaluate
their foraging habitats in the Northwest Atlantic (NWA). Our study revealed large variations in δ13C and δ15N and a correlation between both δ13C and δ15N and the latitude to which the loggerheads traveled after the mating season, thus reflecting a geographic pattern in the
isotopic signatures. Variation in δ13C and δ15N can be explained by differences in food web baseline isotopic signatures rather than differences in loggerhead trophic levels.
Stable isotope analysis may help elucidate residency and migration patterns and identify foraging sea turtle subpopulations
in the NWA due to the isotopically distinct habitats used by these highly migratory organisms. 相似文献
7.
Pajuelo E Rodríguez-Llorente ID Dary M Palomares AJ 《Environmental pollution (Barking, Essex : 1987)》2008,154(2):203-211
Recently, the Rhizobium-legume symbiotic interaction has been proposed as an interesting tool in bioremediation. However, little is known about the effect of most common contaminants on this process. The phytotoxic effects of arsenic on nodulation of Medicago sativa have been examined in vitro using the highly arsenic resistant and symbiotically effective Sinorhizobium sp. strain MA11. The bacteria were able to grow on plates containing As concentrations as high as 10 mM. Nevertheless, as little as 25-35 microM arsenite produced a 75% decrease in the total number of nodules, due to a 90% reduction in the number of rhizobial infections, as could be determined using the strain MA11 carrying a lacZ reporter gene. This effect was associated to root hair damage and a shorter infective root zone. However, once nodulation was established nodule development seemed to continue normally, although earlier senescence could be observed in nodules of arsenic-grown plants. 相似文献
8.
Hannah B. Vander Zanden Joseph B. Pfaller Kimberly J. Reich Mariela Pajuelo Alan B. Bolten Kristina L. Williams Michael G. Frick Brian M. Shamblin Campbell J. Nairn Karen A. Bjorndal 《Marine Biology》2014,161(3):585-598
Diet items and habitat constitute some of the environmental resources that may be used differently by individuals within a population. Long-term fidelity by individuals to particular resources exemplifies individual specialization, a phenomenon that is becoming increasingly recognized across a wide range of species. Less is understood about the consequences of such specialization. Here, we investigate the effects of differential foraging ground use on reproductive output in 183 loggerhead sea turtles (Caretta caretta) nesting at Wassaw Island, Georgia (31.89°N, 80.97°W), between 2004 and 2011 with resulting possible fitness effects. Stable isotope analysis was used to assign the adult female loggerheads to one of three foraging areas in the Northwest Atlantic Ocean. Our data indicate that foraging area preference influences the size, fecundity, and breeding periodicity of adult female loggerhead turtles. We also found that the proportion of turtles originating from each foraging area varied significantly among the years examined. The change in the number of nesting females across the years of the study was not a result of uniform change from all foraging areas. We develop a novel approach to assess differential contributions of various foraging aggregations to changes in abundance of a sea turtle nesting aggregation using stable isotopes. Our approach can provide an improved understanding of the influences on the causes of increasing or decreasing population trends and allow more effective monitoring for these threatened species and other highly migratory species. 相似文献
9.
Raklami Anas Meddich Abdelilah Pajuelo Eloisa Marschner Bernd Heinze Stefanie Oufdou Khalid 《Environmental science and pollution research international》2022,29(30):45683-45697
Environmental Science and Pollution Research - Heavy metal (HM) pollution and the need to preserve the environment have gathered increasing scientific attention. The immobilization of HMs into... 相似文献
1