Polyamine metabolism and signaling in plant abiotic stress protection

Podeu consultar el llibre complet a: http://hdl.handle.net/2445/32393Polyamines (PAs) are small polycationic compounds present in all living organisms. Compelling evidences indicate a role for PAs in plant protection against stress. During the recent years, genetic, molecular and ‘omic’ approaches have been undertaken to unravel the role of PAs in stress signaling. Overall, results point to intricate relationships between PAs, stress hormone pathways and ROS signaling. Such cross-regulations condition stress signaling through the modulation of abscisic acid (ABA) and ROS amplification-loops. In this chapter we compile our recent findings which elucidate molecular mechanisms and signaling pathways by which PAs contribute to stress protection in plants

Double peripheries: homelessness on the edge of the city of Barcelona: the case of Poblenou

This research questions the nature of a periphery based on a doubly peripheral case study (regarding both territorial and social aspects): a non-central neighbourhood in Barcelona in which much homelessness is concentrated. In recent decades, the Poblenou neighbourhood in the Sant Martí district has been affected by the global dynamics of neoliberal urban transformation with the aim of redefining the industrial periphery (22@ Plan (2000), Forum (2004), Superblocks (2016) and Green Hubs (2021)). This is in addition to previous efforts to do away with the slums that characterised the area during the first half of the 20th century. Decades later, homelessness replaced the historic slum dwellings of this neighbourhood with a nomadic, precarious and invisible condition of life, thereby turning into the contemporary expression of the tradition of slums that were censored as a source of conflict. Therefore, this paper states the hypothesis that homelessness has traces and latencies of the district’s peripheral nature and makes them evident, despite attempts to create new centrality. Identifying correlations between destitution and new urban “regeneration” plans for the area is consequently proposed. In addition, the meaning of the term “periphery” is broadened by presenting homelessness as another type of spatial periphery, but this time one that is rootless, dynamic and much larger. To analyse where these two realities meet, the spatial practices and ways of living of homeless people in the neighbourhood are examined based on a bibliographic study and field work, which consists of conducting semi-structured interviews and recording observational data. Accompanied by the concepts of invisibility, dispossession and the right to the city, this paper raises questions such as power relations and borders, the tension between centrality and marginality, and between self-sufficiency and interdependence. Ultimately, it is about drilling down into the meaning of the periphery and its contemporary multiple voices.Peer ReviewedObjectius de Desenvolupament Sostenible::1 - Fi de la PobresaObjectius de Desenvolupament Sostenible::10 - Reducció de les DesigualtatsObjectius de Desenvolupament Sostenible::16 - Pau, Justícia i Institucions SòlidesPostprint (author's final draft

Polyamines under Abiotic Stress: Metabolic Crossroads and Hormonal Crosstalks in Plants

Polyamines are essential compounds for cell survival and have key roles in plant stress protection. Current evidence points to the occurrence of intricate cross-talks between polyamines, stress hormones and other metabolic pathways required for their function. In this review we integrate the polyamine metabolic pathway in the context of its immediate metabolic network which is required to understand the multiple ways by which polyamines can maintain their homeostasis and participate in plant stress responses

Inscripciones y huellas: una aproximación a la experiencia y a la cultura de habitar desde la arquitectura

El presente artículo relata la trayectoria del grupo que en la Escuela Técnica Superior de Arquitectura de Barcelona ha planteado una aproximación de la antropología y la arquitectura para un estudio del espacio habitado. El texto recorre el camino desde la creación de la asignatura Antropología de la ciudad, ideada por la profesora Marta Llorente hace más de dos décadas, hasta la aplicación de métodos antropológicos en el desarrollo del proyecto de investigación "Barcelona ciutat fràgil" sobre los efectos de la COVID-19 en alguno de los espacios de la ciudad. El texto muestra la aproximación que realiza el grupo dirigido por Llorente a través de la docencia impartida y los proyectos de investigación desarrollados durante los últimos años. Se explican las nociones de inscripción y huella y de ciudad frágil y se exponen las indagaciones sobre la topología del espacio urbano y las formas de habitar postpandémicas exploradas hasta ahora. También se abordan las formas de representación que permiten condensar experiencias de vida, formas de memoria, determinadas observaciones del espacio de laciudad o prácticas espaciales de la “cultura urbana” a través de cartografías, dibujos, fotografías, escritos o documentos audiovisuales.Postprint (published version

The Control of Arabidopsis thaliana Growth by Cell Proliferation and Endoreplication Requires the F-Box Protein FBL17.

International audienceA key step of the cell cycle is the entry into the DNA replication phase that typically commits cells to divide. However, little is known about the molecular mechanisms regulating this transition in plants. Here, we investigated the function of FBL17 (F BOX-LIKE17), an Arabidopsis thaliana F-box protein previously shown to govern the progression through the second mitosis during pollen development. Our work reveals that FBL17 function is not restricted to gametogenesis. FBL17 transcripts accumulate in both proliferating and postmitotic cell types of Arabidopsis plants. Loss of FBL17 function drastically reduces plant growth by altering cell division activity in both shoot and root apical meristems. In fbl17 mutant plants, DNA replication is severely impaired and endoreplication is fully suppressed. At the molecular level, lack of FBL17 increases the stability of the CDK (CYCLIN-DEPENDENT KINASE) inhibitor KIP-RELATED PROTEIN2 known to switch off CDKA;1 kinase activity. Despite the strong inhibition of cell proliferation in fbl17, some cells are still able to enter S phase and eventually to divide, but they exhibit a strong DNA damage response and often missegregate chromosomes. Altogether, these data indicate that the F-box protein FBL17 acts as a master cell cycle regulator during the diploid sporophyte phase of the plant

European Architectural History Network, EAHN 2022 : 7th International Meeting. Conference Proceedings

The 7th EAHN Biennial Meeting (Madrid, June 15-19, 2022) attracted a relevant collection of papers on various topics. Like its predecessors, EAHN 2022 aimed to promote high quality research. As a diverse field, architectural history requires interaction and discussion among people with different interests and backgrounds. Beginning and experienced theorists and practitioners, people from different disciplines and different countries gathered both in person and virtually to learn from and contribute to each other’s growth. The conference was organized in two calls. The first one to define the sessions and round tables, and the second one to select the participants. In the first call there were a total of 85 session and roundtable proposals, evaluated in 5 peer-reviewed tracks. Of these, the following contributions were accepted: 20 sessions and 5 roundtables . To participate in these, a total of 486 submissions, evaluated in 25 peer-reviewed tracks, were received. The acceptance rate for contributions received in the peer-reviewed tracks was 29,41% for session and roundtable proposals, 25,72% for full papers and roundtable lectures, and 41,51% for interest group meeting participants. Many of these contributions were accepted after further review to be included in the present proceedings. The final decision on acceptance or rejection of full papers was taken in an Editorial Committee meeting held in September 2022. The meeting discussed a consistent set of criteria to deal with inevitable differences among many reviewers, and the expert advice of the corresponding session chairs and reviewers was taken in consideration