Adaptive strategies of two Portuguese grapevines varieties (Aragon��s. syn. Tempranillo and Trincadeira) face drought: physiological and structural responses.

At Mediterranean regions and particularly in southern Portugal, it is imperative to identify grape varieties more adapted to warm and dry climates in order to overcome future climatic changes. Two Vitis vinifera genotypes, Aragonez (syn. Tempranillo) and Trincadeira, were selected to assess their physiological responses to soil water stress. Vines were subjected to four irrigation regimes: irrigated during all phenological cycle, non-irrigated during all phenological cycle, non irrigated until veraison, irrigated after veraison. Predawn leaf water potential was much higher in Trincadeira than Aragonez in non- irrigated plants. This result is in accordance with its higher stomatal control efficiency in this variety (Trincadeira). Photosynthetic capacity (Amax at saturating light intensity) decreased due to stomatal and biochemical limitations under water stress. However, recovery capacity of leaf water status after irrigation was faster in Trincadeira. Yield and yield x Brix increased when irrigation occurred after veraison, particularly in Trincadeira. These results show that Trincadeira presents a drought adaptation than Aragonez. Ratio of variable to maximum fluorescence Fv/Fm and total leaf chlorophyll related with leaf water potential for both species. Reflectance Normalized Difference Vegetation Index (NDVI705), Red Edge Inflexion Point Index and Photochemical Reflectance Index were related with irrigation treatment. Relative water content and specific leaf area were similar between varieties. In conclusion, we suggested that there is variation among the genotypes and the main physiological parameters for variety selection, for drought, were leaf water potential, stomatal conductance and reflectance indexes.

Evaluation of the evolution of the anthocyanins profile in red wine grape varieties in Alentejo

The flavonoids (including anthocyanins) are wine compounds with important anti-oxidant activity, protecting the cells against oxidative processes, preventing cardiovascular and neurodegenerative diseases, cancer, among others (Antoniolli et al. 2015; Casta��eda-Ovando et al. 2009; Hosu et al. 2014; Huang et al. 2009; Kong et al. 2003). Anthocyanins in grapes at harvest are determinant to red wine quality and their development in the grape must be characterised in order to determine the most suitable date for the harvest. Thus the aim of this research is the evaluation of anthocyanins composition in two red wine grape varieties from v��raison continuing through ripening. Anthocyanins were quantified by high resolution liquid chromatography (HPLC-DAD). Additionally, the total phenols content were quantified by UV-Vis Spectrometry. The anthocyanins��� profile evolution may be dependent on the variety and ripening phase. During ripening grape samples have shown an increase of coumaryl derivatives. This information may lead us to understand the anthocyanins biosynthesis pathway in different grape varieties. The development of anthocyanins from the v��raison seems to follow a pattern that coincides with the increasing accumulation of soluble sugars.

Teatro, locus e Comunidade

A praxis em teatro e comunidade opera e mobiliza diferentes ci��ncias e metodologias em vi��s transversal. Seu movimento busca contribuir para projetos art��sticos e sociais que agregam fen��menos que instauram a compreens��o de quadros de refer��ncias - est��ticas e comunit��rias. Para que se efetivem, h�� a necessidade de determina����o dos espa��os nos quais ocorre o ato teatral. A proposta desse artigo ��, a partir da compreens��o fenomenol��gica, investigar o uso de espa��os p��blicos e comunit��rios como l��cus para a a����o teatral em contextos espec��ficos. Nos exemplos das pesquisas no Brasil e Portugal d��-se conta de como essas pr��ticas dialogam com seus grupos de interesse. A partir dos resultados, indicam-se poss��veis contribui����es metodol��gicas na forma����o de ���Artistas Pedagogos��� e sua atua����o em contextos socio-educacionais.