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Copyright of BIOAGRO is the property of Revista BIOAGRO and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background and aims: Algae and Cyanobacteria species that grow in contaminated sites can accumulate high concentrations of heavy metals. In this work it was proposed to a) characterize the community of algae and Cyanobacteria and b) evaluate the effect of lead (Pb) on the composition of algae present in the rhizosphere of plants capable to accumulate Pb in Córdoba province. M&M: Soil samples were taken from the rhizosphere of Sorghum halepense, Bidens pilosa and Tagetes minuta at sites with different levels of Pb. In the laboratory, the soil was sown in capsules with sterilized Watanabe medium. The cultures grew 9 weeks. The algae and Cyanobacteria were identified over the time and the final relative frequency analyzed. Results: In contaminated soils, 24 species of Cyanobacteria, Chloroplastida and Xanthophyceae were identified. The heterocytous cyanobacteria Cylindrospermum muscicola, Nostoc commune and Calothrix clavata registered a relative mean frequency (between 21 and 60%). Trebouxia parmeliae (Chloroplastida) and Vaucheria sp. (Xanthophyceae) were present in soils with the highest level of Pb. Most of the species were concentrated in the lowest levels of Pb. Conclusions: A negative effect of Pb on the species richness of algae and Cyanobacteria was observed in the rhizosphere of the evaluated plants. Based on the composition of the community of algae and Cyanobacteria in the soil, two groups are determined and could be considered tolerant and non-tolerant communities of Pb contamination. [ABSTRACT FROM AUTHOR]

Copyright of Ecologia Austral is the property of Asociacion Argentina de Ecologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Salud Uninorte is the property of Fundacion Universidad del Norte and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Office work involves maintaining fixed postures for long periods, which leads to the development of skeletal muscle disorders, which is why an ergonomic evaluation is necessary to avoid health problems. The objective of this study is to evaluate, by means of ergonomic methods, the risk of postural loading of workers in the loan area of a library, in order to reduce the health problems associated with musculoskeletal disorders in the administrative area; A woman and a man were evaluated and three work cycles were analyzed: loan, refund and fine. The evaluations were with the Rapid Office Strain Assessment (ROSA) y (Rapid Entire Body Assesment (REBA) method respectively, both anthropometric and work area measurements were taken, and improvements. The results obtained through the methods allowed to inquire about the need to carry out improvement actions to address the inadequate postures and the organization of the workspace. Once the recommendations are implemented, favorable results are obtained, the workers' position improves, the risk level of REBA decreases from 9 to 3 for the case of the woman and from 6 to 2 for the case of the man, concluding that the recommendations were favorable to avoid or diminish the Skeletal Muscle Disorders. [ABSTRACT FROM AUTHOR]

Copyright of Boletín de la Sociedad Argentina de Botánica is the property of Sociedad Argentina de Botanica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Arbuscular mycorrhizal fungi (AMF) colonize approximately 82% of land plants in every ecosystem, even in extreme conditions such as saline soils. In the present work we report the arbuscular mycorrhizal colonization and its vertical root concentration in four Chenopodiaceae plants species (Allenrolfea patagonica, Atriplex argentina, Heterostachys ritteriana and Suaeda divaricata) at five different soil depths in two salines of central Argentina. All the plant species showed mycorrhizal colonization and varied significantly among plant species and sites for all soil depths. Atriplex argentina presented the highest mycorrhizal colonization at almost all soil depths (0-50 cm). In all plant species root concentration decrease as depth increases at both sites. The presence of mycorrhizal roots in the deeper layers of soil in the four Chenopodiaceae plants species, shows that these fungi are tolerant to live in the saline soils of central Argentina. [ABSTRACT FROM AUTHOR]

The objective of this study was to determine the inoculation effect of nine consortiums of Arbuscular Mycorrhizal Fungi (AMF) in coffee seedlings Coffea arabica, Caturra variety, compared with a control (without inoculation), during seven months under greenhouse conditions. The production of coffee in San Martín-Perú, is one of the most important agricultural economic activities. An alternative to increase its production is the employment of AMF. The experiment was done using a completely randomized design, with nine treatments and three repetitions (6 plants/repetition). The origin of the mycorrhizal consortia came from coffee farms of provinces distributed at San Martín Region. The study was performed evaluating parameters as colonization (%), extraradical mycelium length, plant height, leaf area, aerial biomass and dry root mass. The results of the study show that three of the nine consortia studied were more efficient during the growth and development of coffee plants seedlings. Keywords: arbuscular mycorrhizal fungi; coffee; colonization [ABSTRACT FROM AUTHOR]