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1. Calibrating Spanner psychrometers for the effects of ambient temperature: theoretical and experimental considerations

Author:
Hou, Xuemin; Matsumoto, Nicholas J.; Matthews, Mark A.; Shackel, Kenneth A.
Source:
Biosystems engineering 2019 v.183 pp. 85-94
ISSN:
1537-5110
Subject:
water potential,   etc   ; ambient temperature; empirical models; mechanistic models; psychrometers;     Show all 5 Subjects
Abstract:
... Calibration models are indispensable for the use of Spanner-type psychrometers, but the existing calibration models have not been adequately evaluated. A non-zero intercept in the regression between electrical output (E) and water potential (Ψ) is commonly observed during Spanner psychrometer calibration, but is incompatible with the temperature correction factor (TCF) model, used to describe the ...
DOI:
10.1016/j.biosystemseng.2019.04.008

2. Hydropower system operation stability considering the coupling effect of water potential energy in surge tank and power grid

Author:
Guo, Wencheng; Peng, Zhiyuan
Source:
Renewable energy 2019 v.134 pp. 846-861
ISSN:
0960-1481
Subject:
water potential,   etc   ; differential equation; potential energy; vibration; water power;     Show all 5 Subjects
Abstract:
... This paper aims to study the hydropower system operation stability considering the coupling effect of water potential energy in surge tank and power grid. Firstly, the mathematical formulation for hydropower system with surge tank that connected to power grid is established. Then, the hydropower system operation stability is investigated. The coupling effect mechanism of surge tank and power grid ...
DOI:
10.1016/j.renene.2018.11.064

3. Beyond soil water potential: An expanded view on isohydricity including land–atmosphere interactions and phenology

Author:
Novick, Kimberly A.; Konings, Alexandra G.; Gentine, Pierre
Source:
Plant, cell and environment 2019 v.42 no.6 pp. 1802-1815
ISSN:
0140-7791
Subject:
leaf water potential; soil water potential,   etc   ; drought; ecosystems; leaf area index; phenology; soil water; stomatal conductance; vapor pressure deficit;     Show all 9 Subjects
Abstract:
... Over the past decade, the concept of isohydry or anisohydry, which describes the link between soil water potential (ΨS), leaf water potential (ΨL), and stomatal conductance (gₛ), has soared in popularity. However, its utility has recently been questioned, and a surprising lack of coordination between the dynamics of ΨL and gₛ across biomes has been reported. Here, we offer a more expanded view of ...
DOI:
10.1111/pce.13517

4. Measurements and simulation of leaf xylem water potential and root water uptake in heterogeneous soil water contents

Author:
Hayat, Faisal; Ahmed, Mutez Ali; Zarebanadkouki, Mohsen; Cai, Gaochao; Carminati, Andrea
Source:
Advances in water resources 2019 v.124 pp. 96-105
ISSN:
0309-1708
Subject:
leaf water potential; soil water potential; xylem water potential,   etc   ; Lupinus; drying; hydraulic conductivity; leaves; models; osmotic pressure; rhizosphere; root pressure; roots; sand; sandy soils; soil water; transpiration; water uptake; xylem;     Show all 18 Subjects
Abstract:
... The relationship between leaf water potential, transpiration rate and soil water potential is complex, particularly when the soil water potential in the root zone is not uniform, which is the rule rather than the exception in soils. Our objectives were: 1) to measure the effect of heterogeneous soil water potentials on the relation between leaf water potential and transpiration rate and 2) to test ...
DOI:
10.1016/j.advwatres.2018.12.009

5. Alternative methods of estimating the water potential at turgor loss point in Acer genotypes

Author:
Banks, Jonathan M.; Hirons, Andrew D.
Source:
Plant methods 2019 v.15 no.1 pp. 34
ISSN:
1746-4811
Subject:
water potential,   etc   ; Acer platanoides; Acer pseudoplatanus; cultivars; dewpoint; drought tolerance; genotype; hygrometers; survival rate; trees; turgor;     Show all 11 Subjects
Abstract:
... BACKGROUND: Selecting for drought tolerance in urban tree species can have a significant influence on survival rates, aftercare requirements and performance. The water potential at turgor loss point (πₜₗₚ) is gaining popularity as a trait to help determine drought tolerance to aid tree selection. Therefore, it is important to understand if differing methods used to measure or calculate πₜₗₚ delive ...
DOI:
10.1186/s13007-019-0410-3

6. Physiological indicators to assess water status in potted grapevine (Vitis vinifera L.)

Author:
Tuccio, L.; Lo Piccolo, E.; Battelli, R.; Matteoli, S.; Massai, R.; Scalabrelli, G.; Remorini, D.
Source:
Scientia horticulturae 2019 v.255 pp. 8-13
ISSN:
0304-4238
Subject:
leaf water potential,   etc   ; Vitis vinifera; irrigation; leaves; sap flow; shrinkage; stomatal conductance; temperature; vines;     Show all 9 Subjects
Abstract:
... Many physiological parameters were compared to identify the most sensitive and reliable indicator of grapevine water status. One-year-old potted grapevines (Vitis vinifera L., cvs. ‘Sangiovese’ and ‘Cabernet Sauvignon’) were studied under two irrigation treatments: 100% and 0% of daily water consumption. Measurements of pre-dawn (PD) and midday (MD) leaf water potential (Ψw), MD stem water potenti ...
DOI:
10.1016/j.scienta.2019.05.017

7. Approach using trunk growth rate data to identify water stress conditions in olive trees

Author:
Corell, M.; Martín-Palomo, M.J.; Girón, I.; Andreu, L.; Trigo, E.; López-Moreno, Y.E.; Torrecillas, A.; Centeno, A.; Pérez-López, D.; Moriana, A.
Source:
Agricultural water management 2019 v.222 pp. 12-20
ISSN:
0378-3774
Subject:
water potential,   etc   ; Olea europaea; deficit irrigation; evapotranspiration; irrigation scheduling; orchards; trees; water stress; Spain;     Show all 9 Subjects
Abstract:
... Reduced water availability around the world drives the need for indicators that enable a better control of water stress at orchard level. Among the different parameters that could be used as indicators, trunk diameter fluctiations, are daily cycles suggested as tools for irrigation scheduling. These cycles can define different indicators and the trunk growth rate (TGR) was suggested as the most su ...
DOI:
10.1016/j.agwat.2019.05.029

8. Re-evaluating pressure chamber methods of water status determination in field-grown grapevine (Vitis spp.)

Author:
Levin, Alexander D.
Source:
Agricultural water management 2019 v.221 pp. 422-429
ISSN:
0378-3774
Subject:
leaf water potential,   etc   ; Vitis; irrigation scheduling; monitoring; petioles; protocols; sampling; vines; vineyards; wages and remuneration;     Show all 10 Subjects
Abstract:
... Despite the fact that the pressure chamber has been used as a tool to assess vine water status and assist in scheduling vineyard irrigation for more than 30 years, there remains some disagreement in sampling protocol with respect to midday leaf water potential (Ψleaf) and midday stem water potential (Ψstem) determination. Therefore, the primary goal of this study was to test various sampling proto ...
DOI:
10.1016/j.agwat.2019.03.026

9. Anisohydric behavior linked to persistent hydraulic damage and delayed drought recovery across seven North American tree species

Author:
Kannenberg, Steven A.; Novick, Kimberly A.; Phillips, Richard P.
Source:
Thenew phytologist 2019 v.222 no.4 pp. 1862-1872
ISSN:
0028-646X
Subject:
leaf water potential,   etc   ; drought; embolism; forests; gas exchange; photosynthesis; soil water; trees; water stress;     Show all 9 Subjects
Abstract:
... The isohydry‐anisohydry spectrum has become a popular way to characterize plant drought responses and recovery processes. Despite the proven utility of this framework for understanding the interconnected physiological changes plants undergo in response to water stress, new challenges have arisen pertaining to the traits and tradeoffs that underlie this concept. To test the utility of this framewor ...
DOI:
10.1111/nph.15699

10. Effect over the elongation growth acceleration of root segments of Zea Mays L. due to elevated external pressure

Author:
Suslov, M.A.; Anisimov, A.V.
Source:
Environmental and experimental botany 2019 v.162 pp. 239-246
ISSN:
0098-8472
Subject:
water potential,   etc   ; Zea mays; apoplast; cell walls; corn; dissolved oxygen; mathematical models; mercuric chloride; roots; xylem;     Show all 10 Subjects
Abstract:
... The effect of elevated external pressure on the acceleration of elongation growth in maize root segments was studied. The growth rate of segments increases approximately by 2–2.5 times with the increase in the external pressure of up to 0.5–1 MPa. The dependence of segments’ elongation with the external pressure magnitude is shown for 0.25–2 MPa. Pre-treatment of root segments with a mercury chlor ...
DOI:
10.1016/j.envexpbot.2019.03.001

11. The comparative xylem structure and function of petioles and twigs of mistletoe Loranthus europaeus and its host Quercus pubescence

Author:
Gebauer, Roman; Albrechtová, Petra; Plichta, Roman; Volařík, Daniel
Source:
Trees 2019 v.33 no.3 pp. 933-942
ISSN:
0931-1890
Subject:
leaf water potential,   etc   ; Loranthus; Quercus pubescens; branches; hosts; petioles; photosynthesis; transpiration; tree physiology; water supply; xylem;     Show all 11 Subjects
Abstract:
... KEY MESSAGE: The xylem structure of the petiole and twig revealed in this study increase our knowledge about mistletoe and host function and their interaction. Although transpiration and photosynthesis relationships between mistletoes and their hosts have been studied extensively, only a few studies have been performed on their comparative anatomical structures. To our knowledge, no studies have f ...
DOI:
10.1007/s00468-019-01829-2

12. Linking saturated hydraulic conductivity and air permeability to the characteristics of biopores derived from X-ray computed tomography

Author:
Zhang, Zhongbin; Liu, Kailou; Zhou, Hu; Lin, Henry; Li, Daming; Peng, Xinhua
Source:
Journal of hydrology 2019 v.571 pp. 1-10
ISSN:
0022-1694
Subject:
water potential,   etc   ; air; air flow; computed tomography; hydrology; image analysis; macropores; permeability; saturated hydraulic conductivity;     Show all 9 Subjects
Abstract:
... The different types of soil macropores (e.g., biopores and non-biopores) vary in the conductivity of water or air due to the difference in the 3D pore characteristics. The objectives of this study were to reveal which types of macropores and which macropore characteristics played the most important roles in regulating water or air flow. Intact soil columns sampled from the subsoil of a long-term f ...
DOI:
10.1016/j.jhydrol.2019.01.041

13. Structural memory in grapevines: Early season water availability affects late season drought stress severity

Author:
Netzer, Yishai; Munitz, Sarel; Shtein, Ilana; Schwartz, Amnon
Source:
European journal of agronomy 2019 v.105 pp. 96-103
ISSN:
1161-0301
Subject:
water potential,   etc   ; Vitis vinifera; cambium; drought; heat; rain; seasonal variation; vines; water stress; xylem;     Show all 10 Subjects
Abstract:
... In the future drought events are expected to occur more frequently, with unpredictable rain and heat events. In current research we investigated how different water availability patterns influenced late season plant water status in Vitis vinifera.‘Cabernet Sauvignon’ grapevines were grown for three consecutive years. We compared the response to five water availability regimes: High, Intermediate, ...
DOI:
10.1016/j.eja.2019.02.008

14. Foliar water uptake: Processes, pathways, and integration into plant water budgets

Author:
Berry, Z. Carter; Emery, Nathan C.; Gotsch, Sybil G.; Goldsmith, Gregory R.
Source:
Plant, cell and environment 2019 v.42 no.2 pp. 410-423
ISSN:
0140-7791
Subject:
leaf water potential,   etc   ; carbon; ecosystems; foliar uptake; leaves; transpiration; water flow; water uptake;     Show all 8 Subjects
Abstract:
... Nearly all plant families, represented across most major biomes, absorb water directly through their leaves. This phenomenon is commonly referred to as foliar water uptake. Recent studies have suggested that foliar water uptake provides a significant water subsidy that can influence both plant water and carbon balance across multiple spatial and temporal scales. Despite this, our mechanistic under ...
DOI:
10.1111/pce.13439

15. The potential of the tree water potential

Author:
Steppe, Kathy
Source:
Tree physiology 2018 v.38 no.7 pp. 937-940
ISSN:
1758-4469
Subject:
water potential,   etc   ; canopy; climate; drought; forests; tree physiology; trees;     Show all 7 Subjects
Abstract:
... Non-invasive quantification of tree water potential is one of the grand challenges for assessing the fate of trees and forests in the coming decades. Tree water potential is a robust and direct indicator of tree water status and is preferably used to track how trees, forests and vegetation in general respond to changes in climate and drought. In this issue of Tree Physiology, Dietrich et al. (2018 ...
DOI:
10.1093/treephys/tpy064

16. Functional responses of the herbaceous plant community explain ecohydrological impacts of savanna shrub encroachment

Author:
Geissler, Katja; Hahn, Claudia; Joubert, David; Blaum, Niels
Source:
Perspectives in plant ecology, evolution and systematics 2019 v.39 pp. 125458
ISSN:
1433-8319
Subject:
leaf water potential; xylem water potential,   etc   ; Acacia; carbon dioxide; climatic factors; competitive exclusion; ecological differentiation; fire prevention; grasses; grazing management; herbaceous plants; leaves; perennials; plant communities; plant height; rooting; saplings; savannas; seedlings; shrubs; soil water; stress tolerance; water stress;     Show all 23 Subjects
Abstract:
... Major drivers of savanna shrub encroachment are climatic conditions, CO2 and unsustainable grazing management including fire prevention. Although all drivers affect ecohydrological processes, and given that water is a seasonally scarce resource in savannas, it remains largely unclear how shrub encroachment itself affects hydrological conditions that feed back into water use and community assembly ...
DOI:
10.1016/j.ppees.2019.125458

17. Water stress for a long period before harvest and crop load effects on marketable yield and consumer acceptance of nectarine

Author:
Lopez, Gerardo; Echeverria, Gemma; Behboudian, M. Hossein; Marsal, Jordi; Girona, Joan
Source:
Scientia horticulturae 2019 v.255 pp. 103-107
ISSN:
0304-4238
Subject:
water potential,   etc   ; consumer acceptance; deficit irrigation; fruit quality; fruits; growers; horticulture; nectarines; psychological stress; trees; water shortages; water stress;     Show all 12 Subjects
Abstract:
... Under water shortage growers may need to adjust horticultural practices to optimize yield and fruit quality. This study explores the reduction of crop load as a technique to mitigate water stress considering marketable yield and consumer acceptance as the most relevant traits. Commercial irrigation (CI) and deficit irrigation (DI) for a long period before harvest was applied to a late-maturing nec ...
DOI:
10.1016/j.scienta.2019.05.018

18. Discrimination ability of leaf and stem water potential at different times of the day through a meta-analysis in grapevine (Vitis vinifera L.)

Author:
Santesteban, L.G.; Miranda, C.; Marín, D.; Sesma, B.; Intrigliolo, D.S.; Mirás-Avalos, J.M.; Escalona, J.M.; Montoro, A.; de Herralde, F.; Baeza, P.; Romero, P.; Yuste, J.; Uriarte, D.; Martínez-Gascueña, J.; Cancela, J.J.; Pinillos, V.; Loidi, M.; Urrestarazu, J.; Royo, J.B.
Source:
Agricultural water management 2019 v.221 pp. 202-210
ISSN:
0378-3774
Subject:
leaf water potential,   etc   ; Vitis vinifera; climatic factors; cultivars; data collection; irrigation; leaves; meta-analysis; vineyards; working conditions; Spain;     Show all 11 Subjects
Abstract:
... Water potential is considered to be the “gold-standard” measure for plant water status determination. However, there are some discrepancies on how and at what time of the day water potential measurements should be performed in order to obtain meaningful information. The aim of this work is to evaluate the discrimination ability of water potential measurements in grapevines depending on the time of ...
DOI:
10.1016/j.agwat.2019.04.020

19. Effect of regulated deficit irrigation on the quality of raw and table olives

Author:
Sánchez-Rodríguez, L.; Lipan, L.; Andreu, L.; Martín-Palomo, M.J.; Carbonell-Barrachina, Á.A.; Hernández, F.; Sendra, E.
Source:
Agricultural water management 2019 v.221 pp. 415-421
ISSN:
0378-3774
Subject:
water potential,   etc   ; deficit irrigation; demonstration farms; foods; freshwater; fruits; harvesting; olives; polyphenols; rehydration; water shortages; water stress; Spain;     Show all 13 Subjects
Abstract:
... Fresh water scarcity is a major worldwide issue. There is a need to reduce water use whereas preserving the quality of food products. Regulated deficit irrigation (RDI) is a strategy to reduce fresh water consumption. The aim of this work was to study the effect of RDI on olives when applied before harvesting, without a rehydration period, on the quality of table olives. The experiment was perform ...
DOI:
10.1016/j.agwat.2019.05.014

20. Beyond isohydricity: The role of environmental variability in determining plant drought responses

Author:
Feng, Xue; Ackerly, David D.; Dawson, Todd E.; Manzoni, Stefano; McLaughlin, Blair; Skelton, Robert P.; Vico, Giulia; Weitz, Andrew P.; Thompson, Sally E.
Source:
Plant, cell and environment 2019 v.42 no.4 pp. 1104-1111
ISSN:
0140-7791
Subject:
water potential,   etc   ; Quercus douglasii; drought; environmental factors; greenhouses; plant-water relations; space and time; topography; vineyards; California;     Show all 10 Subjects
Abstract:
... Despite the appeal of the iso/anisohydric framework for classifying plant drought responses, recent studies have shown that such classifications can be strongly affected by a plant's environment. Here, we present measured in situ drought responses to demonstrate that apparent isohydricity can be conflated with environmental conditions that vary over space and time. In particular, we (a) use data f ...
DOI:
10.1111/pce.13486