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waterpotential, etc ; Vitis; cultivars; leaves; thermodynamics; Show all 5 Subjects
Abstract:
... Water potential (Ψw) is a fundamental thermodynamic parameter that describes the activity of water and is a key metric of plant water status. In this paper, we evaluate the continuous measurement of water potential in grapevine trunks using a novel in situ sensor known as a ‘microtensiometer’ under field conditions in two South Australian vineyards. We characterised the seasonal and diurnal dynami ...
leaf waterpotential, etc ; climate; drought; epiphytes; leaves; rain; soil; stomatal conductance; Show all 8 Subjects
Abstract:
... PREMISE: Epiphytes are abundant in ecosystems such as tropical montane cloud forests where low‐lying clouds are often in contact with vegetation. Climate projections for these regions include more variability in rainfall and an increase in cloud base heights, which would lead to drier conditions in the soil and atmosphere. While recent studies have examined the effects of drought on epiphytic wate ...
waterpotential, etc ; Paulownia; cytokinins; genetic variation; internode length; molecular weight; salt tolerance; Show all 7 Subjects
Abstract:
... The interaction between cytokinin, auxin and GA controlled in vitro shoot multiplication in paulownia was influenced by a medium water potential (Ψ) modulation, where it was modulated using different textures or strengths of MS medium, media of different types (MS, WPM, SH and B5) or NaCl incorporation. The interaction between 2 mg/L BAP and 0.1 mg/L NAA expressed the highest shoot number on each ...
soil waterpotential, etc ; ambient temperature; biogeography; data collection; evolution; habitats; lizards; metabolism; microclimate; soil water; Show all 10 Subjects
Abstract:
... AIM: Our understanding of species’ responses to climate depends on choosing the scale for the analysis. Processes driving physiological adaptation that occur at the small spatial scales most relevant to animals may be masked in correlations between organismal traits and broad‐scale climatologies, but the extent to which this undermines our understanding of the macroevolution of physiological trait ...
soil waterpotential, etc ; crop production; environment; hydraulic conductivity; leaves; phenotype; transpiration; water flow; water uptake; Show all 9 Subjects
Abstract:
... Soil drying is a limiting factor for crop production worldwide. Yet, it is not clear how soil drying impacts water uptake across different soils, species, and root phenotypes. Here we ask (1) what root phenotypes improve the water use from drying soils? and (2) what root hydraulic properties impact water flow across the soil–plant continuum? The main objective is to propose a hydraulic framework t ...
leaf waterpotential, etc ; Oryza sativa; Vigna radiata; leaves; modulus of elasticity; mung beans; photosynthesis; rice; turgor; Show all 9 Subjects
Abstract:
... A distinct midday to afternoon (midday) reduction of leaf photosynthetic rate (A ₙ) occurred in rice, even under well-irrigated conditions on a clear day, but not in green gram. No significant differences between species in leaf water potential (Ψₗₑₐf) or plant resistance to water transport during daytime were found. From the pressure–volume curves, it was revealed that rice leaves had a larger bu ...
soil waterpotential, etc ; air; air flow; atmospheric pressure; ceramics; evaporation; glass; microparticles; porous media; soil water; tensiometers; Show all 11 Subjects
Abstract:
... Soil moisture porous matrix sensors may be good alternatives to tensiometers for measuring soil–water matric potential (SMP) for irrigation scheduling based on soil–water status approaches. The objective of this paper is to present and evaluate a new porous matrix sensor (IGstat) for detecting specific SMP thresholds for possible application in irrigation scheduling regulated by the SMP threshold ...
waterpotential, etc ; Olea europaea; cameras; canopy; deficit irrigation; leaf conductance; meteorological data; olives; orchards; temperature; water stress; Show all 11 Subjects
Abstract:
... The canopy temperature is a promising methodology for deficit irrigation scheduling. This measurement is used to calculate the crop water stress index (CWSI), which needs the estimation of non-water stress baseline (NWSB). In olive orchards, NWSB changed at different times of the day and throughout the season. The aim of this work was to evaluate a simplified methodology for estimating NWSB to all ...
leaf waterpotential, etc ; forests; irrigation management; leaf relative water content; leaves; seedlings; stomatal conductance; trees; water content; Show all 9 Subjects
Abstract:
... In forest nurseries, irrigation management becomes more complex as different seedlings of tropical species, with different architectures, are grown close to each other. In this context, there are gaps in knowledge about the physiological responses of species with different mean leaf angles when subjected to different irrigation depths. Thus, this work aimed to analyze whether mean leaf angles affe ...
Alice Gauthey; Jennifer M. R. Peters; Rosana Lòpez; Madeline R. Carins‐Murphy; Celia M. Rodriguez‐Dominguez; David T. Tissue; Belinda E. Medlyn; Tim J. Brodribb; Brendan Choat
waterpotential, etc ; Eucalyptus saligna; canopy; drought; embolism; environment; leaf area; micro-computed tomography; rain; transpiration; water stress; Show all 11 Subjects
Abstract:
... The mechanisms by which woody plants recover xylem hydraulic capacity after drought stress are not well understood, particularly with regard to the role of embolism refilling. We evaluated the recovery of xylem hydraulic capacity in young Eucalyptus saligna plants exposed to cycles of drought stress and rewatering. Plants were exposed to moderate and severe drought stress treatments, with recovery ...
waterpotential, etc ; Aristotelia chilensis; antioxidant activity; drought tolerance; field capacity; photosynthesis; plant growth; salicylic acid; water stress; Show all 9 Subjects
Abstract:
... Salicylic acid (SA) has been shown to ameliorate drought stress. However, physiological and biochemical mechanisms involved in drought stress tolerance induced by SA in plants have not been well understood. Thus, this study aimed to study the role of SA application on enzymatic and non-enzymatic antioxidants, photosynthetic performance, and plant growth in A. chilensis plants subjected to moderate ...
soil waterpotential, etc ; carbon dioxide; energy; global change; microbial activity; models; soil organic carbon; soil water characteristic; Show all 8 Subjects
Abstract:
... Soils are important carbon (C) reservoirs and play a critical role in regulating the global C cycle. Soil water potential (SWP) measures the energy with which water is retained in the soil and is one of the most vital factors that constrain the decomposition of soil organic C (SOC). The measurements for soil water retention curve (SWRC), on which the estimation of SWP depends, are usually carried ...
leaf waterpotential, etc ; Vitis vinifera; agronomy; algorithms; cameras; canopy; demonstration farms; irrigation water; temperature; vineyards; water stress; wines; Show all 12 Subjects
Abstract:
... The quality of wine grapes in dry climates greatly depends on utilizing optimal amounts of irrigation water during the growing season. Robust and accurate techniques are essential for assessing crop water status in grapevines so that both over-irrigation and excessive water deficits can be avoided. This study proposes a robust strategy to assess crop water status in grapevines. Experiments were pe ...
waterpotential, etc ; Lavandula stoechas; applied research; bioclimate; butterflies; dormancy; ornamental plants; salinity; seed germination; soil salinity; water stress; Show all 11 Subjects
Abstract:
... Butterfly lavander (Lavandula stoechas L.) seed germination is sensitive to salinity and water stress. Seed priming effectively mitigates the adverse effects of salt and water stresses on seed emergence. Although its extensive uses as an ornamental plant, no studies have assessed the effects of seed priming on Butterfly lavander germination under salinity and moisture stress. Here, we investigate ...
waterpotential, etc ; Cyprus; Vitis vinifera; agronomy; biomass; chlorophyll; climate; field experimentation; fruit composition; grapes; stomatal conductance; vines; viticulture; Australia; Show all 14 Subjects
Abstract:
... The world’s changing climate is placing great pressure on the resources for sustainable viticulture. With this, it has become necessary to investigate grape varieties that are well adapted to hot climates. This study investigated whether two Cypriot varieties (Xynisteri and Maratheftiko) responded differently to Shiraz and Sauvignon Blanc grown under different irrigation regimes (full, 50% and 25% ...
Inês L. Cabral; António Teixeira; Arnaud Lanoue; Marianne Unlubayir; Thibaut Munsch; Joana Valente; Fernando Alves; Pedro Leal da Costa; Frank S. Rogerson; Susana M. P. Carvalho; Hernâni Gerós; Jorge Queiroz
waterpotential, etc ; Vitis; anthocyanins; deficit irrigation; drought; evapotranspiration; flavanols; flavonols; leaves; metabolites; metabolome; metabolomics; summer; water stress; Mediterranean region; Portugal; Show all 16 Subjects
Abstract:
... The introduction of irrigation in vineyards of the Mediterranean basin is a matter of debate, in particular in those of the Douro Demarcated Region (DDR), due to the limited number of available studies. Here, we aimed to perform a robust analysis in three consecutive vintages (2018, 2019, and 2020) on the impact of deficit irrigation on the yield, berry quality traits, and metabolome of cv. ‘Touri ...
Jordi Martínez‐Vilalta; Louis S. Santiago; Rafael Poyatos; Llorenç Badiella; Miquel de Cáceres; Ismael Aranda; Sylvain Delzon; Alberto Vilagrosa; Maurizio Mencuccini
waterpotential, etc ; embolism; probability distribution; risk; sample size; Show all 5 Subjects
Abstract:
... Minimum water potential (Ψₘᵢₙ) is a key variable for characterizing dehydration tolerance and hydraulic safety margins (HSMs) in plants. Ψₘᵢₙ is usually estimated as the absolute minimum tissue Ψ experienced by a species, but this is problematic because sample extremes are affected by sample size and the underlying probability distribution. We compare alternative approaches to estimate Ψₘᵢₙ and as ...
soil waterpotential, etc ; carbon nitrogen ratio; climate; climate change; mineralization; prediction; regression analysis; soil pH; soil water; water content; water stress; Show all 11 Subjects
Abstract:
... The sensitivity of C and N mineralization in soil to water potential is mostly described in simulation models as a linear function independent of the pedoclimatic conditions. We hypothesized that water sensitivity could be site-specific and dependent of climate or soil properties. In this study, we characterized the responses of C and N mineralization to water stress in ten soils representing a ra ...
waterpotential, etc ; climate; climate change; drought; dry environmental conditions; forest ecosystems; growth rings; leaves; temperature; tree growth; trees; wood; wood density; Show all 13 Subjects
Abstract:
... Tree species display a wide variety of water‐use strategies, growth rates and capacity to tolerate drought. However, if we want to forecast species capacity to cope with increasing aridity and drought, we need to identify which measurable traits confer resilience to drought across species. Here, we use a global tree ring network (65 species; 1931 site series of ring‐width indices—RWI) to evaluate ...
leaf waterpotential, etc ; chlorophyll; experimental design; field capacity; gas exchange; greenhouses; photosynthesis; soil water deficit; transpiration; water supply; water use efficiency; Colombia; Show all 12 Subjects
Abstract:
... In the coffee-growing areas of Colombia, the vulnerability of soils to conditions of water deficit has been determined and this limitation has been projected to increase its intensity and severity during extreme climatic scenarios, which constitute one of the factors limiting coffee production. The objective of this study was to evaluate the effect of prolonged water deficit conditions on the phys ...