https://repositorio.uchile.cl/handle/2250/117686 Artículos de revistas 2026-04-03T18:23:15Z https://repositorio.uchile.cl/handle/2250/174067 Contrasting grapevines grafted into naturalized rootstock suggest scion-driven transcriptomic changes in response to water deficit Franck Berger, Nicolas; Zamorano Merino, Denisse; Wallberg Núñez, Britt; Hardy, Charlotte; Ahumada, Mario; Rivera, Natalia; Montoya, María; Urra, Claudio; Meneses, Claudio; Balic, Iván; Mejía, Nilo; Ibacache, Antonio; Zurita Silva, Andrés Viticulture is facing water deficit problems related to climate change, new extremes in heat and precipitation regimes and drought events. Rootstocks use was assessed as strategy for enhancing performance of Cabernet Sauvignon (CS) and Syrah (Sy) under water deficit. Vines were grafted onto naturalized grapevines selected from hyper-arid Chile, and compared to own-grafted and commercial Ruggeri 140. Plants were submitted to optimal (100 % ETc) and deficit (30 % ETc) irrigation throughout two seasons at field conditions. Functional traits along both seasons were determined. Water deficit reduced all growth and physiological traits especially in CS. R32 rootstock induced significantly higher values for most traits irrespective of cv and seasons associated to higher root growth. Transcriptomic analysis was further performed in both cultivars grafted over R32 rootstock by RNA-Seq, determining that gene up-regulation extent was higher in Sy. More stable transcriptional landscape was determined in CS than Sy, which might be linked to its hydric strategy. Unexpectedly, major differences in transcriptional behaviour were detected in R32 rootstock, revealing major transcriptional changes occurring at root level, suggesting scion-driven transcriptional regulation in response to stress. Finally, R32 rootstock can be considered for both near iso and anisohydric grapevines as adaptive strategy for climate constrains. 2020-01-01T00:00:00Z https://repositorio.uchile.cl/handle/2250/120317 TOWARDS A GLOBAL DRYLANDS OBSERVING SYSTEM: OBSERVATIONAL REQUIREMENTS AND INSTITUTIONAL SOLUTIONS Verstraete, M. M.; Hutchinson, C. F.; Grainger, A.; Smith, M. Stafford; León Rogers, Augusto; Scholes, R. J.; Barbosa, P.; Mbow, C. Quantitative data on dryland changes and their effects on the people living there are required to support policymaking and environmental management at all scales. Data are regularly acquired by international, national or local entities, but presently exhibit specific gaps. Promoting sustainable development in drylands necessitates a much stronger integration, coordination and synthesis of available information. Spacebased remote sensing systems continue to play an important role but do not fulfill all needs. Dedicated networks and observing systems, operating over a wide range of scales and resolutions, are needed to address the key issues that concern decision-makers at the scale of local communities, countries and the international community. This requires a mixture of ‘bottom–up’ and ‘top–down’ design principles, and multiple ownership of the resultant system. This paper reviews the limitations of current observing systems and suggests establishing a Global Drylands Observing System, which would capitalize on the achievements of systems already established to support the other Rio Conventions. This Global Drylands Observing System would provide an integrated, coherent entry point and user interface to a range of underlying information systems, identify and help generate missing information, propose a set of standards for the acquisition, archiving and distribution of data where these are lacking, evaluate the quality and reliability of these data and promote scientific research in these fields by improving access to data. The paper outlines the principles and main objectives of a Global Drylands Observing System and calls for renewed efforts to invigorate cooperation mechanisms between the many global environmental conventions. Artículo de publicación ISI 2011-01-01T00:00:00Z