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Ethylene is considered one of the most important plant hormones orchestrating plant responses to flooding stress. However, ethylene may induce deleterious effects on plants, especially when produced at high rates in response to stress. In this paper, we explored the effect of attenuated ethylene sensitivity in the Never ripe (Nr) mutant on leaf photosynthetic capacity of flooded tomato plants. We found out that reduced ethylene perception in Nr plants was associated with a more efficient photochemical and non‐photochemical radiative energy dissipation capability in response to flooding. The data correlated with the retention of chlorophyll and carotenoids content in flooded Nr leaves. Moreover, leaf area and specific leaf area were higher in Nr, indicating that ethylene would exert a negative role in leaf growth and expansion under flooded conditions. Although stomatal conductance was hampered in flooded Nr plants, carboxylation activity was not affected by flooding in the mutant, suggesting that ethylene is responsible for inducing non‐stomatal limitations to photosynthetic CO2 uptake. Upregulation of several cysteine protease genes and high protease activity led to Rubisco protein loss in response to ethylene under flooding. Reduction of Rubisco content would, at least in part, account for the reduction of its carboxylation efficiency in response to ethylene in flooded plants. Therefore, besides its role as a trigger of many adaptive responses, perception of ethylene entails limitations in light and dark photosynthetic reactions by speeding up the senescence process that leads to a progressive disassembly of the photosynthetic machinery in leaves of flooded tomato plants.

RESUMENLa historiografía del patrimonio educativo en España ha experimentado, a lo largo de los últimos quince años, avances significativos. En este estudio se efectúa una aproximación al análisis de algunas de las vías principales que más han contribuido a impulsar la renovación y la difusión de la historiografía del patrimonio educativo en nuestro país. En primer lugar se aborda el papel desempeñado por las exposiciones pedagógicas como instrumento al servicio de la promoción de la investigación y su divulgación. En segundo lugar, se presenta el despegue alcanzado por el museísmo pedagógico y las vinculaciones existentes entre ciertos tipos de museos, los grupos de investigación universitarios existentes y los proyectos de investigación desarrollados. Por último, se analiza el papel desempañado por las reuniones científicas en el avance del conocimiento tomando como referencia las aportaciones efectuadas a las jornadas científicas de la Sociedad Española para el Estudio del Patrimonio Histórico-Educativo (SEPHE).Palabras clave: historiografía; patrimonio educativo; museísmo pedagógico; jornadas científicas; España. RESUMOA historiografia do patrimônio educativo na Espanha tem experimentado, ao longo dos últimos quinze anos, avanços significativos. Neste estudo realiza--se uma aproximação das análises de algumas das linhas principais que têm contribuído para a renovação e difusão da historiografia do patrimônio educativo na Espanha. Em primeiro lugar aborda-se o papel desempenhado pelas exposições pedagógicas como instrumento a serviço da promoção da investigação e sua divulgação. Em segundo lugar, apresenta-se o desenvolvimento alcançado pela musealização pedagógica e as vinculações existentes entre certos tipos de museus, os grupos de pesquisa universitários existentes e os projetos de investigação desenvolvidos. Por último, analisa-se o papel desempenhado pelos encontros científicos no avanço do conhecimento, tomando como referência os apontamentos realizados nas jornadas científicas da Sociedade Espanhola para o Estudo do Patrimônio Histórico-Educativo (SEPHE).Palavras-chave: historiografia; patrimônio educativo; musealização pedagógica; jornadas científicas; Espanha. ABSTRACTEducational heritage historiography in Spain has experienced significant improvement in the last fifteen years. In this study an approximation of analyses on some of the main lines which have contributed to the renewal and dissemination of educational heritage historiography in Spain takes place. Firstly, the role played by pedagogical exhibitions was approached, as an instrument at the service of promoting their investigation and spreading. Secondly, the development reached by educational musealization and the existing bonds among some types of museums, the existing university research groups and the investigation projects developed are presented. Finally, the role played by the scientific meetings in knowledge improvement is studied, taking as reference the observations from the scientific journeys of the Spanish Society for the His...

<p>En este artículo se efectúa una reflexión en torno a la obra Zapata and the Mexican Revolution del historiador estadounidense John Womack, Jr. El análisis se funda en el concepto de mitohistoria, que parte de la premisa de que todo gran relato histórico posee una estructura mítica. En consecuencia, se intentan identificar tales rasgos en el texto de Womack, sobre todo su construcción del estado de Morelos y de Emiliano Zapata, respectivamente, como un espacio y como un héroe mítico. Por otro lado, se arguye que tal tipo de construcción respondió a las corrientes intelectuales y políticas que permearon los estudios latinoamericanos en los Estados Unidos en los años sesenta y setenta del siglo pasado.</p>