Stem water potential estimation of drip-irrigated early-maturing peach trees under Mediterranean conditions

Abrisqueta, Isabel; Conejero, Wenceslao; Valdés-Vela, Mercedes; Vera, Juan; Ortuño, M.F.; Ruiz-Sánchez, M.C.

doi:10.1016/j.compag.2015.03.004

Cited by 60 publications

(45 citation statements)

References 38 publications

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“…Higher determination coefficient values (R 2 ) were found when open-air and shade net conditions were considered separately but the covariance analysis indicated no differences between the regression coefficients. Similar relationships have been observed in studies made in lemon [15], peach [36], apricot [35], almond [37] and avocado [10], highlighting the role of the atmosphere as a driving force for the water transference processes, and emphasizing the suitability of Ψstem as a robust plant water status indicator [38][39][40]. In summer Ψ stem values fluctuated between −0.25 and −1.0 MPa, while in winter between −0.25 and −0.5 MPa.…”

Section: Stem Water Potentialsupporting

confidence: 82%

Leaf Water Relations in Lime Trees Grown under Shade Netting and Open-Air

Mira-García

Conejero

Vera

et al. 2020

Plants

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Physiological plant water status indicators are useful for managing precision irrigation in regions with limited water resources. The aim of this work was to evaluate the effect of shade netting on the diurnal and seasonal variations of several plant water status indicators in young lime trees (Citrus latifolia Tan., cv. Bearss), grown at the CEBAS-CSIC experimental station in Murcia, Spain. Stem water potential (Ψ stem ), leaf gas exchange (net photosynthesis (P n ) and stomatal conductance (g s )), and canopy temperature (T c ) were measured on representative days of winter and summer. The Ψ stem daily pattern was quite similar in both seasons under both conditions. However, the circadian rhythm of leaf gas exchange was affected by shade conditions, especially in summer, when shaded leaves showed maximum g s values for a longer time, allowing higher net photosynthesis (37%). Canopy temperature behaved similarly in both conditions, nevertheless, lower values were recorded in open-air than in shaded trees in the two seasons. The canopy-to-air temperature difference (T c − T a ), however, was lower in shaded trees during the daylight hours, indicating the higher degree of leaf cooling that was facilitated by high g s values. The possibility of continuously recording T c makes it (or the proposed canopy thermal index, CTI) a promising index for precise irrigation scheduling. Shade netting was seen to favour gas exchange, suggesting that it may be considered alternative to open-air for use in semi-arid areas threatened by climate change.Plants 2020, 9, 510 2 of 14 that integrates the soil and atmosphere water status, as well as measuring the physiological response to the water available in the soil. The most commonly used are the conventional, non-automated methods for measuring leaf or stem water potential, stomatal conductance or photosynthesis, and automated methods for measuring sap flow, canopy temperature, trunk diameter, or leaf turgor pressure [6]. Canopy temperature is one of the plant water status indicators that has recently become popular due to the development of infrared thermometry [6,7]. In the last few years, the use of canopy temperature for irrigation scheduling has been tested in several fruit tree crops, including cherry [8,9] avocado [10], almond [11], nectarine [12], peach [13] and also citrus trees such as lemon [14,15]. However, less information is available concerning lime.Shading, which aims to protect crops against abiotic stresses such as high air temperature or excessive solar radiation, is regarded as a good cropping technique to cope with climatic change. This is likely due to the net increases light scattering, thus reducing radiation and creating an optimal microclimate for crop development [16]. As several studies have pointed out [17,18], shaded conditions affect agrometeorological variables, such as relative humidity, wind velocity and canopy and soil temperatures. Additionally, changes in the microclimate can modify physiological water status indicators. Many authors have pointe...

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Section: Stem Water Potentialsupporting

confidence: 82%

Leaf Water Relations in Lime Trees Grown under Shade Netting and Open-Air

Mira-García

Conejero

Vera

et al. 2020

Plants

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“…As for the characteristics of the plant material, the trees were 8 years old at baseline, without significant differences as to their size or vigour prior to the application of any irrigation treatment. To confirm plant water status, the stem water potential ( Ψ stem ) was measured at solar noon during all growing season every 3 or 4 days …”

Section: Methodsmentioning

confidence: 99%

Deficit irrigation strategies enhance health‐promoting compounds through the intensification of specific enzymes in early peaches

Falagán

Artés

Gómez³

et al. 2015

J Sci Food Agric

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“…As VPD integrates T a and RH, it is a sensitive agro-meteorological variable for correlating with Ψ stem [43]. In peach trees, Abrisqueta et al [81] proposed an alternative to the field measurement of Ψ stem , using a multiple linear regression equation based on SWC, mean VPD, and growing degree hours (GDH) values. These authors reported that the contribution of the soil and atmosphere components to Ψ stem differed according to the intensity of the water deficit imposed in each irrigation treatment.…”

Section: Role Of Ndvi Savi and Tc-ta Indexesmentioning

confidence: 99%

Terrestrial and Remote Indexes to Assess Moderate Deficit Irrigation in Early-Maturing Nectarine Trees

et al. 2019

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Monitoring plant water status is relevant for the sustainable management ofirrigation under water deficit conditions. Two treatments were applied to an early-maturingnectarine orchard: control (well irrigated) and precise deficit irrigation (PDI, based on soilwater content thresholds). Moderate water deficits generated by PDI were assessed bycomparing terrestrial: stem water potential (Ψstem) and gas exchange parameters, with remote:canopy temperature, normalized difference vegetation (NDVI), and soil adjusted vegetationindex (SAVI), plant water status indicators. The Ψstem was the only indicator that showedsignificant differences between treatments. NDVI and SAVI at the postharvest period wereappropriate indexes for estimating winter pruning, although they did not serve well as plantstress indicator. Vapor pressure deficit along with Ψstem values were able to predict remotesensing data. Ψstem and canopy to air temperature difference values registered the highestsignal intensity and NDVI the highest sensitivity for detecting water deficit situations. Theresults suggest that care should be taken when using instantaneous remote indicators toevaluate moderate water deficits in deciduous fruit trees; more severe/longer water stressconditions are probably needed. The proposed PDI strategy promoted water saving whilemaintaining yield, and could be considered a promising tool for semi-arid agrosystems.

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Stem water potential estimation of drip-irrigated early-maturing peach trees under Mediterranean conditions

Cited by 60 publications

References 38 publications

Leaf Water Relations in Lime Trees Grown under Shade Netting and Open-Air

Leaf Water Relations in Lime Trees Grown under Shade Netting and Open-Air

Deficit irrigation strategies enhance health‐promoting compounds through the intensification of specific enzymes in early peaches

Terrestrial and Remote Indexes to Assess Moderate Deficit Irrigation in Early-Maturing Nectarine Trees

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