Biochemical and physiological changes in jack bean under mycorrhizal symbiosis growing in soil with increasing Cu concentrations

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)The influence of jack bean [Canavalia ensiformis (L.) D.C.] mycorrhization, by the arbuscular mycorrhizal (AM) fungus Glomus etunicatum, in response to increasing Cu concentrations in soil (0, 50, 150 and 450 mg dm(-3)) was studied. In the highest Cu dose, mycorrhiza decreased Cu concentrations in plant organs and promoted biomass accumulation. in addition, mycorrhizal colonization was not affected by Cu suggesting certain tolerance of the inoculated AM fungus to this metal. Cu-induced proline accumulation and an increase in soluble amino acid contents in leaves, with higher proline contents in AM plants. Marked differences in foliar soluble amino acid composition were also observed in response to Cu in the soil. The activity of key antioxidant enzymes increased mainly in the leaves of non-AM plants, indicating increased production of reactive oxygen species. However, changes in malondialdehyde content were not observed Suggesting an effective antioxidant system. Independent of mycorrhization, glutathione content in leaves decreased as Cu increased in the soil. Phytochelatins were detected in the leaves of both Cu treated and untreated plants. and quantitative and qualitative differences were observed due to mycorrhization. In summary, the AM fungus was able to maintain an efficient symbiosis with jack bean plants in soil containing high Cu concentrations. A combination of physiological and nutritional changes caused by the symbiotic association that might be of interest for phytoremediation strategies in Cu-contaminated soils. (C) 2009 Elsevier B.V. All rights reserved.682198207Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

Digging into Business Process Meta-models: A First Ontological Analysis

While modern definitions of business processes exist and are shared in the Business Process Management community, a commonly agreed meta-model is still missing. Nonetheless, several different business process meta-models have been recently proposed and discussed in the literature, which look at business process models from different perspectives, focusing on different aspects and often using different labels for denoting the same element or element relation. In this paper, we start from elements and relations discovered inspecting the literature on business process meta-models through a systematic literature review. We then combine these elements and relations to build a business process meta-model. The obtained literature-based business process meta-model, which is on purpose built to disclose criticalities, is then inspected and discussed. The analysis reveals, besides the lack of attention to some crucial business process elements, issues and inconsistencies in the literature meta-models. An ontological analysis is finally carried out and possible solutions to the discovered issues are proposed

Construct validity in workplace bullying and harassment research

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