Antonio Diaz-Espejo | Milà i Fontanals Institution - Spanish National Research Council 8CSIC) (original) (raw)

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Papers by Antonio Diaz-Espejo

Research paper thumbnail of Biohybrid systems for environmental intelligence on living plants

Proceedings of the Conference on Information Technology for Social Good

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Research paper thumbnail of Field Variability of Invading Populations of Spartina densiflora Brong. in Different Habitats of the Odiel Marshes (SW Spain)

Estuarine, Coastal and Shelf Science, 2001

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Research paper thumbnail of Partitioning changes in photosynthetic rate into contributions from different variables

Plant, cell & environment, Jan 30, 2014

Changes in net CO2 assimilation rate (A) are often partitioned into contributions from changes in... more Changes in net CO2 assimilation rate (A) are often partitioned into contributions from changes in different variables using an approach that is based on an expression from calculus: namely the definition of the exact differential of A, which states that an infinitesimal change in A (dA) is equal to the sum of infinitesimal changes in each of the underlying variables, each multiplied by the partial derivative of A with respect to the variable. Finite changes in A can thus be partitioned by integrating this sum across a finite interval. The most widely used method of estimating that integral is a coarse discrete approximation that uses partial derivatives of the natural logarithm of A rather than A itself. This yields biased and ambiguous estimates of partitioned changes in A. We present an alternative partitioning approach based on direct numerical integration of dA. The new approach does not require any partial derivatives to be computed, and it can be applied under any conditions t...

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Research paper thumbnail of The effect of strobilurins on leaf gas exchange, water use efficiency and ABA content in grapevine under field conditions

Strobilurins are one of the most important classes of agricultural fungicides. In addition to the... more Strobilurins are one of the most important classes of agricultural fungicides. In addition to their anti-fungal effect, strobilurins have been reported to produce simultaneous effects in plant physiology. This study investigated whether the use of strobilurin fungicide improved water use efficiency in leaves of grapevines grown under field conditions in a Mediterranean climate in southern Spain. Fungicide was applied three times in the vineyard and measurements of leaf gas exchange, plant water status, abscisic acid concentration in sap ([ABA]), and carbon isotope composition in leaves were performed before and after applications. No clear effect on stomatal conductance, leaf water potential and intrinsic water use efficiency was found after three fungicide applications. ABA concentration was observed to increase after fungicide application on the first day, vanishing three days later. Despite this transient effect, evolution of [ABA] matched well with the evolution of leaf carbon isotope ratio, which can be used as a surrogate for plant water use efficiency. Morning stomatal conductance was negatively correlated to [ABA]. Yield was enhanced in strobilurin treated plants, whereas fruit quality remained unaltered.

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Research paper thumbnail of Seasonal evolution of diffusional limitations and photosynthetic capacity in olive under drought

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Research paper thumbnail of Rubisco catalytic properties optimized for present and future climatic conditions

Plant Science, 2014

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Research paper thumbnail of Flexas et al. Plant Science

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Research paper thumbnail of Gago plant science

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Research paper thumbnail of Plasticity of vulnerability to leaf hydraulic dysfunction during acclimation to drought in grapevines: an osmotic-mediated process

Physiologia Plantarum, 2014

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Research paper thumbnail of Using SAP flow measurement to quantify water consumption in the olive tree

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Research paper thumbnail of Ecophysiological features of the olive tree related to the orchard management

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Research paper thumbnail of Use of physiological based stomatal conductance models in agronomical studies: The case of garpevine

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Research paper thumbnail of Programación del riego deficitario controlado en el olivar

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Research paper thumbnail of Linking Changes in Radial Profiles of Sap Flux Density with the Response of Water Vapour Exchange to Water Deficit

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Research paper thumbnail of Seasonal evolution of biochemical and diffusional limitations to photosynthesis in olive

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Research paper thumbnail of Xylem functioning and water relations of the elastic living tissue of the bark: new insights about their coordination

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Research paper thumbnail of Loss of hydraulic functioning at leaf, stem and root level and its role in the stomatal behaviour during drought in olive trees

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Research paper thumbnail of Role of hydraulic and chemical signals in leaves, stems and roots in the stomatal behaviour of olive trees under water stress and recovery conditions

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Research paper thumbnail of Leaf patch clamp pressure probe measurements on olive leaves in a nearly turgorless state

Plant Biology, 2012

The non-invasive leaf patch clamp pressure (LPCP) probe measures the attenuated pressure of a lea... more The non-invasive leaf patch clamp pressure (LPCP) probe measures the attenuated pressure of a leaf patch, P(p) , in response to an externally applied magnetic force. P(p) is inversely coupled with leaf turgor pressure, P(c) , i.e. at high P(c) values the P(p) values are small and at low P(c) values the P(p) values are high. This relationship between P(c) and P(p) could also be verified for 2-m tall olive trees under laboratory conditions using the cell turgor pressure probe. When the laboratory plants were subjected to severe water stress (P(c) dropped below ca. 50 kPa), P(p) curves show reverse diurnal changes, i.e. during the light regime (high transpiration) a minimum P(p) value, and during darkness a peak P(p) value is recorded. This reversal of the P(p) curves was completely reversible. Upon watering, the original diurnal P(p) changes were re-established within 2-3 days. Olive trees in the field showed a similar turnover of the shape of the P(p) curves upon drought, despite pronounced fluctuations in microclimate. The reversal of the P(p) curves is most likely due to accumulation of air in the leaves. This assumption was supported with cross-sections through leaves subjected to prolonged drought. In contrast to well-watered leaves, microscopic inspection of leaves exhibiting inverse diurnal P(p) curves revealed large air-filled areas in parenchyma tissue. Significantly larger amounts of air could also be extracted from water-stressed leaves than from well-watered leaves using the cell turgor pressure probe. Furthermore, theoretical analysis of the experimental P(p) curves shows that the propagation of pressure through the nearly turgorless leaf must be exclusively dictated by air. Equations are derived that provide valuable information about the water status of olive leaves close to zero P(c) .

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Research paper thumbnail of Carbon losses by tillage under semi-arid Mediterranean rainfed agriculture (SW Spain)

Spanish Journal of Agricultural Research, 2009

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Research paper thumbnail of Biohybrid systems for environmental intelligence on living plants

Proceedings of the Conference on Information Technology for Social Good

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Research paper thumbnail of Field Variability of Invading Populations of Spartina densiflora Brong. in Different Habitats of the Odiel Marshes (SW Spain)

Estuarine, Coastal and Shelf Science, 2001

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Partitioning changes in photosynthetic rate into contributions from different variables

Plant, cell & environment, Jan 30, 2014

Changes in net CO2 assimilation rate (A) are often partitioned into contributions from changes in... more Changes in net CO2 assimilation rate (A) are often partitioned into contributions from changes in different variables using an approach that is based on an expression from calculus: namely the definition of the exact differential of A, which states that an infinitesimal change in A (dA) is equal to the sum of infinitesimal changes in each of the underlying variables, each multiplied by the partial derivative of A with respect to the variable. Finite changes in A can thus be partitioned by integrating this sum across a finite interval. The most widely used method of estimating that integral is a coarse discrete approximation that uses partial derivatives of the natural logarithm of A rather than A itself. This yields biased and ambiguous estimates of partitioned changes in A. We present an alternative partitioning approach based on direct numerical integration of dA. The new approach does not require any partial derivatives to be computed, and it can be applied under any conditions t...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The effect of strobilurins on leaf gas exchange, water use efficiency and ABA content in grapevine under field conditions

Strobilurins are one of the most important classes of agricultural fungicides. In addition to the... more Strobilurins are one of the most important classes of agricultural fungicides. In addition to their anti-fungal effect, strobilurins have been reported to produce simultaneous effects in plant physiology. This study investigated whether the use of strobilurin fungicide improved water use efficiency in leaves of grapevines grown under field conditions in a Mediterranean climate in southern Spain. Fungicide was applied three times in the vineyard and measurements of leaf gas exchange, plant water status, abscisic acid concentration in sap ([ABA]), and carbon isotope composition in leaves were performed before and after applications. No clear effect on stomatal conductance, leaf water potential and intrinsic water use efficiency was found after three fungicide applications. ABA concentration was observed to increase after fungicide application on the first day, vanishing three days later. Despite this transient effect, evolution of [ABA] matched well with the evolution of leaf carbon isotope ratio, which can be used as a surrogate for plant water use efficiency. Morning stomatal conductance was negatively correlated to [ABA]. Yield was enhanced in strobilurin treated plants, whereas fruit quality remained unaltered.

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Research paper thumbnail of Seasonal evolution of diffusional limitations and photosynthetic capacity in olive under drought

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Rubisco catalytic properties optimized for present and future climatic conditions

Plant Science, 2014

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Research paper thumbnail of Flexas et al. Plant Science

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Gago plant science

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Research paper thumbnail of Plasticity of vulnerability to leaf hydraulic dysfunction during acclimation to drought in grapevines: an osmotic-mediated process

Physiologia Plantarum, 2014

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Research paper thumbnail of Using SAP flow measurement to quantify water consumption in the olive tree

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Ecophysiological features of the olive tree related to the orchard management

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Use of physiological based stomatal conductance models in agronomical studies: The case of garpevine

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Programación del riego deficitario controlado en el olivar

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Linking Changes in Radial Profiles of Sap Flux Density with the Response of Water Vapour Exchange to Water Deficit

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Seasonal evolution of biochemical and diffusional limitations to photosynthesis in olive

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Xylem functioning and water relations of the elastic living tissue of the bark: new insights about their coordination

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Loss of hydraulic functioning at leaf, stem and root level and its role in the stomatal behaviour during drought in olive trees

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Role of hydraulic and chemical signals in leaves, stems and roots in the stomatal behaviour of olive trees under water stress and recovery conditions

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Leaf patch clamp pressure probe measurements on olive leaves in a nearly turgorless state

Plant Biology, 2012

The non-invasive leaf patch clamp pressure (LPCP) probe measures the attenuated pressure of a lea... more The non-invasive leaf patch clamp pressure (LPCP) probe measures the attenuated pressure of a leaf patch, P(p) , in response to an externally applied magnetic force. P(p) is inversely coupled with leaf turgor pressure, P(c) , i.e. at high P(c) values the P(p) values are small and at low P(c) values the P(p) values are high. This relationship between P(c) and P(p) could also be verified for 2-m tall olive trees under laboratory conditions using the cell turgor pressure probe. When the laboratory plants were subjected to severe water stress (P(c) dropped below ca. 50 kPa), P(p) curves show reverse diurnal changes, i.e. during the light regime (high transpiration) a minimum P(p) value, and during darkness a peak P(p) value is recorded. This reversal of the P(p) curves was completely reversible. Upon watering, the original diurnal P(p) changes were re-established within 2-3 days. Olive trees in the field showed a similar turnover of the shape of the P(p) curves upon drought, despite pronounced fluctuations in microclimate. The reversal of the P(p) curves is most likely due to accumulation of air in the leaves. This assumption was supported with cross-sections through leaves subjected to prolonged drought. In contrast to well-watered leaves, microscopic inspection of leaves exhibiting inverse diurnal P(p) curves revealed large air-filled areas in parenchyma tissue. Significantly larger amounts of air could also be extracted from water-stressed leaves than from well-watered leaves using the cell turgor pressure probe. Furthermore, theoretical analysis of the experimental P(p) curves shows that the propagation of pressure through the nearly turgorless leaf must be exclusively dictated by air. Equations are derived that provide valuable information about the water status of olive leaves close to zero P(c) .

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Carbon losses by tillage under semi-arid Mediterranean rainfed agriculture (SW Spain)

Spanish Journal of Agricultural Research, 2009

Bookmarks Related papers MentionsView impact