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Understanding plant resistance requires an interdisciplinary effort between biological and agricultural sciences. In this setting, phytopathology has experienced an upsurge of interest from researchers and scholars in the disciplines of ecology, evolution and molecular biology. This encounter did neither avoid misunderstandings among scholars nor the use of similar concepts with different meanings. The purpose of this paper is to offer a modern comprehensive view of plant resistance against pathogens using a classical phytopathology concept as framework: Van der Plank s concept of horizontal and vertical resistance. This concept is used in other agricultural science disciplines (plant breeding and genetics), supporting why it is a proper framework for explaining plant resistance. Within this frame, other classical phytopathologycal concepts are explained in combination with modern model descriptions of plant-pathogen interactions and how all these concepts are related with quantitative and field resistance. This review is written in Spanish because it serves an additional purpose. In the Spanish-speaking America, besides interdisciplinarity, phytopathology as an academic discipline faces another challenge: the students' low-English language proficiency. In this regard, this review intends to become a companion guide for plant-pathology teachers in the region interested in providing an insight into the modern concepts of plant resistance., (Copyright © 2020 Asociación Argentina de Microbiología. Publicado por Elsevier España, S.L.U. All rights reserved.)

Since the end of the 1990s, as in other Latin American countries, Uruguay has experienced an "agricultural boom," an advance in the agricultural sector and the introduction of new technologies as well as new ways of producing and working. In addition, since 2005, the country has seen a surge in rural unionization, associated with collective bargaining processes and the expansion of workers' rights at the national level. However, this process has not yet been able to consolidate significant changes in the historical working conditions of rural labor. This paper analyzes the social construction of the risk of rural wage labor from the perspective of rural leaders, based on a qualitative approach. In the workers' discourses appear elements of naturalization as well as persistent difficulties in their work to improve their working conditions, as a way of impacting their health and quality of life.

Food security and the vulnerability among indigenous and peasant populations has become a topic of interest to public health all around the world, leading to the investigation about measurement, classification and factors that determine it. This systematic review aims to describe the situation of food security in indigenous and peasant communities, and the methods used for evaluation. The literature search was performed on the Pub Med (5), ScienceDirect (221) and Scopus (377) databases searching for publications between 2004 and 2015, a total of 603 items were located with the search engines. At the end of the screening process and after adding the items found in the gray literature, 25 papers were obtained to write the review. In the 11 years evaluated between 2004 and 2015, scientific activity around the theme was poor with just 4.54% of the publications on this subject, but for 2011 the percentage increased to 13 publications, 63%. Various factors that influence the development of food insecurity are climate change, the diversity of agriculture, globalization and market westernization.

The tons of organic waste that are annually generated by agro-industry, can be used as raw material for methane production. For this reason, it is important to previously perform biodegradability tests to organic wastes for their full scale methanization. This paper addresses biodegradability, methane production and the behavior of populations of eubacteria and archaeabacteria during anaerobic digestion of banana, mango and papaya agroindustrial wastes. Mango and banana wastes had higher organic matter content than papaya in terms of their volatile solids and total solid rate (94 and 75% respectively). After 63 days of treatment, the highest methane production was observed in banana waste anaerobic digestion: 63.89ml CH4/per gram of chemical oxygen demand of the waste. In the PCR-DGGE molecular analysis, different genomic footprints with oligonucleotides for eubacteria and archeobacteria were found. Biochemical methane potential results proved that banana wastes have the best potential to be used as raw material for methane production. The result of a PCR- DGGE analysis using specific oligonucleotides enabled to identify the behavior of populations of eubacteria and archaeabacteria present during the anaerobic digestion of agroindustrial wastes throughout the process., (Copyright © 2015 Asociación Argentina de Microbiología. Publicado por Elsevier España, S.L.U. All rights reserved.)

As the final contribution to this important World Organisation for Animal Health (OIE) publication, this paper provides some relevant background and contextual information and identifies a number of strategically significant international activities that will influence the future direction of animal welfare internationally. The assumption of an animal welfare leadership role by the OIE, with the full support of its 167 Member Countries, is an international development of major strategic significance. As an inter-governmental organisation, the OIE is committed to a science-based approach to the development of animal welfare guidelines and standards and to working closely with all stakeholders. This paper covers the use of animals in both agriculture and science, reflecting the OIE's dual remit for both animal health and animal welfare and the importance of animal-based research and testing to the OIE's animal health and reference laboratory roles.

This article examines interpretations regarding the relationship between means of support and fertility, taking into account views on social reproduction among peasants, with emphasis on the way they are expressed in terms of indicators. The author begins with a brief summary of theories put forth by Malthus, and then examines Neo-Malthusian models which use as an independent variable, the amount of land and as a dependent variable, the number of children. He notes the existence of a positive ratio between these variables, and then demonstrates that in Chayanov's model, the number of children is used as an independent variable, while the idea of a positive ratio with the amount of land is still maintained. He compares these assumptions with those of Palerm, who suggests the existence of an inverse ratio between the amount of land available and fertility; this leads to policy implications contrary to those arising from neo-Malthusian models. The paper ends with a discussion of assumptions about the rationality, motivations, and guiding values the different approaches attribute to economic and demographic behavior among peasants.