Browsing by Author "Gil Montenegro, Pilar Macarena"
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- ItemCharacterization and Pathogenicity of Botryosphaeriaceae Species Obtained from Avocado Trees with Branch Canker and Dieback and from Avocado Fruit with Stem End Rot in Chile(2019) Valencia Díaz, Ana Luisa; Gil Montenegro, Pilar Macarena; Latorre G., Bernardo; Rosales V., Marlene
- ItemComparación de dos métodos agronómicos y uno geofísico para la determinación del estatus hídrico de suelo y planta en condiciones naturales y de cultivos frutales(2023) Schmidt Kamp, José Andrés; Gil Montenegro, Pilar Macarena; Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalThe current mega drought in Chile represents a major problem for fruit crops of the central regions and its native vegetation, the sclerophyll forest. The traditional methods to determine soil water status used in agriculture fail to deliver data that is representative of the soil profile in which roots from vegetation are distributed, due to non-uniformity in the soil texture. Electric Resistivity Tomography method (ERT) solves this problem by measuring the soil profile entirely at several depths. In this study, measurements of soil moisture were carried out in fruit orchards (apples and almonds), and in three locations with native vegetation, during a whole season following the same transect. Measurements include: Soil moisture by Frequency domain Reflectometry (FDR) and gravimetric method, soil apparent resistivity by ERT; and four physiological parameters taken in adjacent plants: stomatal conductance (gs), midday stem water potential (ψMD), maximum yield of PSII (Fv/Fm) and chlorophyl concentration. Both FDR and gravimetric methods had difficulties to explain the behavior of vegetation because they assume a point based humidity data as representative of the entire soil profile. The best method to predict the ecophysiological behavior in apple and in natural conditions was ERT.
- ItemComunidades indígenas del Norte Grande. Propuestas para una agricultura sustentable(2015) Bonomelli de Pinaga, Claudia María; Gil Montenegro, Pilar Macarena; Sallato, Bernardita; Zaviezo Palacios, Tania
- ItemEffect of Application of Sulfuric and Humic Acid in the Mitigation of Root Asphyxiation Stress in Potted Avocado Plants(2019) Bonomelli de Pinaga, Claudia María; Arias, María Ignacia; Celis, Valentina; Venegas, Dayanne; Gil Montenegro, Pilar Macarena
- ItemEffect of Soil Type on Calcium Absorption and Partitioning in Young Avocado (Persea americana Mill.) Trees(2019) Claudia Bonomelli; Gil Montenegro, Pilar Macarena; Bruce Schaffer
- ItemEl código de sustentabilidad de la industria vitivinícola de Chile(Pontificia Universidad Catolica de Chile, 2020) Brossard Aravena, Natalia Daniela; Bordeu Schwarze, Edmundo; Gil Montenegro, Pilar Macarena; Knopp, Daniel
- ItemEl código de sustentabilidad de la industria vitivinícola de Chile(Pontificia Universidad Catolica de Chile, 2020) Brossard Aravena, Natalia Daniela; Bordeu Schwarze, Edmundo; Gil Montenegro, Pilar Macarena; Knopp, Daniel
- ItemElectrical potentials in "W. Murcott" tangor trees in response to salinity stress(2014) Koryzma-Zepp, J. A.; Gil Montenegro, Pilar Macarena; Schaffer, B.
- ItemElectrical signal measurements in avocado trees: A potential tool for monitoring physiological responses to soil water content?(2011) Gil Montenegro, Pilar Macarena; Gurovich R., Luis Alberto; Iturriaga Agüera, Rodrigo
- ItemElectrical signaling, stomatal conductance, ABA and Ethylene content in avocado trees in response to root hypoxia(2009) Gil Montenegro, Pilar Macarena; Gurovich R., Luis Alberto; García Bacchiega, Nicolás Alberto.; Iturriaga Agüera, Rodrigo
- ItemEvaluación de riego subsuperficial e inyección de ozono en solución acuosa al suelo para viveros de plantas de nogal(2020) Badilla Ruiz, Arturo Ignacio; Gil Montenegro, Pilar Macarena; Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalPara poder suplir la creciente demandas de plantas de nogal los viveros deben apuntar a mejorar el rendimiento y calidad de las plantas producidas disminuyendo al mismo tiempo la aplicación de pesticidas u otros productos químicos con el fin de controlar enfermedades. La finalidad de este estudio fue evaluar el impacto que tienen las tecnologías de riego subsuperficial y ozono en el suelo y su impacto en la altura final y la fisiología de plantas de nogal (Juglans regia L.). El ensayo fue instalado con plantas de nogal cv. Chandler dispuestas en un marco de plantación 0,3 x 1,2 m en el valle central de Chile (33°40' S, 70°35' W) en la temporada 2019-2020 utilizando un diseño experimental con tres tratamientos dispuestos en cuatro bloques: T0 riego por goteo superficial; T1 riego por goteo subsuperficial y T2 riego por goteo subsuperficial con solución acuosa de ozono. El tratamiento de ozono mostró un aumento en la tasa de difusión de oxígeno, pero una disminución en altura (39.21 cm), biomasa total y otros parámetros fisiológicos. Por otro lado, el riego por goteo subsuperficial mostró un aumento en la humedad volumétrica del suelo antes y después del riego, sumado a una mayor conductancia estomática en los últimos días de medición y una mayor altura final alcanzada (46.04 cm). Los resultados indican que el riego con ozono no presentó los resultados esperados, pero todavía se requiere un mayor estudio en su efecto sobre el nogal y condiciones de campo, mientras que el riego por goteo subsuperficial puede tener un potencial uso en viveros de nogal
- ItemFactors that predisposing to persea americana Mill. to iInfections of botryosphaeriaceae species in central zone of Chile(2019) Valencia Díaz, Ana Luisa; Gil Montenegro, Pilar Macarena; Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
- ItemIncreased Drought and Salinity Tolerance in Citrus aurantifolia (Mexican Lemon) Plants Overexpressing Arabidopsis CBF3 Gene(2020) Romero Romero, J. L.; Inostroza Blancheteau, C.; Reyes Díaz, M.; Matte Risopatron, Juan Pablo; Aquea Zeballos, José Felipe; Espinoza Inostroza, Carmen Valeria; Gil Montenegro, Pilar Macarena; Arce Johnson, Jorge Patricio
- ItemInnovación para el mejor uso del agua e insumos relacionados(Pontificia Universidad Catolica de Chile, 2020) Brossard Aravena, Natalia Daniela; Bordeu Schwarze, Edmundo; Cea, Daniela; Zuñiga, Alejandra; Gil Montenegro, Pilar Macarena; Knopp, Daniel
- ItemLeaf removal before flooding influences recovery of avocado (Persea americana Mill.) trees from flooding stress(2013) Sanclemente, M.; Schaffer, B.; Gil Montenegro, Pilar Macarena; Davies, F.; Crane, J.
- ItemPartial root-zone drying irrigation, shading, or mulching effects on water savings, productivity and quality of "Syrah" grapevines(2018) Gil Montenegro, Pilar Macarena; Lobos, P.; Durán, K.; Olguín, J.; Cea, D.; Schaffer, B.
- ItemPhysiological and Growth Responses of W. Murcott Tangor Grafted on Four Rootstocks under Water Restriction(2024) Tobar Amar, Sophia Antonia; Gil Montenegro, Pilar Macarena; Schaffer, Bruce; Schwember Neira, Andrés Ricardo; Cautín, Ricardo; Martiz Martiz, Johanna PaolaCitrus orchards in semi-arid regions are increasingly exposed to drought conditions due to climate change. This study compared the physiological and growth responses of ‘W. Murcott’ tangor (WM) grafted onto Citrus macrophylla (M), Swingle citrumelo (SC), C-35 citrange (C35), or bitter citrandarin (C22) rootstock subjected to two irrigation treatments: daily irrigation to replace 100% of the water lost daily by evapotranspiration (ET; control treatment) or daily irrigation to replace 75% of the water lost daily by ET (water deficit treatment). For trees in each treatment, leaf gas exchange, relative chlorophyll content, chlorophyll fluorescence, midday stem water potential, trunk cross-sectional area, and shoot length were measured 46 days after treatments were initiated. The results showed that WM on SC or C22 rootstock exhibited isohydric behavior, where decreased stomatal conductance limited transpiration in the water deficit treatment. WM on M rootstock exhibited an anisohydric response in the water deficit treatment, where there was no stomatal control of water loss by transpiration. Among the rootstocks tested for WM, the most tolerant to soil water deficit was SC, whereas trees on M rootstock were the most negatively affected by soil water deficit.
- ItemPhysiological and Yield Responses of Green-Shelled Beans (Phaseolus vulgaris L.) Grown under Restricted Irrigation(2021) Karen Campos; Andrés R. Schwember; Daniel Machado; Monica Ozores-Hampton; Gil Montenegro, Pilar Macarena
- ItemQuantifying effects of irrigation and soil water content on electrical potentials in grapevines (Vitis vinifera) using multivariate statistical methods(2014) Gil Montenegro, Pilar Macarena; Schaffer, B.; Navarro, R.; Fuentealba, C.; Minoletti, F.
- ItemResponse of Potted Citrus Trees Subjected to Water Deficit Irrigation with the Application of Superabsorbent Polyacrylamide Polymers(2022) Daniela Cea; Claudia Bonomelli; Johanna Martiz; Gil Montenegro, Pilar Macarena