Maximum diurnal trunk shrinkage is a sensitive indicator of plant water, stress in Diospyros kaki (Persimmon) trees

Badal, E.; Buesa, Ignacio; Guerra, Danilo Dourado; Bonet, Luís; Ferrer, Pedro Pablo; Intrigliolo, Diego S.

doi:10.1016/j.agwat.2010.08.007

Cited by 33 publications

(20 citation statements)

References 19 publications

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“…At the beginning of the experiment, trees had a canopy ground cover of 39% of the soil surface area allotted per tree. Other orchard characteristics are described in Badal et al (2010).…”

Section: Persimmon Experimentsmentioning

confidence: 99%

“…The specific aims were i) to assess the use of mean canopy temperature and temperature variability within the crowns as water stress indexes; ii) to test this water stress indexes in persimmon and citrus tree crops which were selected because of their differences in leaf anatomy (larger and thicker leaves in persimmon than in citrus) and differential stomatal response to air vapor pressure deficit (VPD) under favorable soil water conditions. It is well known that citrus trees tend to reduce stomatal conductance in response to high VPD (Oguntunde et al, 2007;Villalobos et al, 2009); while in Persimmon trees there is some evidence that stomatal conductance might be more insensitive to air VPD (Badal et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Usefulness of thermography for plant water stress detection in citrus and persimmon trees

Ballester

Jiménez-Bello

Castel

et al. 2013

Agricultural and Forest Meteorology

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124

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The feasibility of using canopy temperature (T c ) measured with a hand-operated infrared thermographic camera as a water stress indicator was evaluated in the field during two seasons on citrus and persimmon trees subjected to different levels of deficit irrigation. In both species, which differ in leaf anatomy and stomatal response to environmental conditions, T c was compared with midday stem water potential ( s ) measurements. In persimmon trees, leaf stomatal conductance (g s ) was also measured. T c was the most sensitive indicator of plant water status particularly due to the lower tree-to-tree variability as compared to  s and g s . On the other hand, in citrus trees T c was not always affected by plant water stress. Only in the second experimental season, when air vapour pressure deficit values were below 2.7 kPa and images were also taken from above the canopies, deficit-irrigated trees had higher T c than the control ones, this difference being at most 1.7 ºC. Overall, the results show that hand-operated thermographic cameras can be used to detect plant water stress in both fruit tree species.Nevertheless, the use of T c measurements to detect plant water stress appears to be more precise in persimmon than in orange citrus. This might be because persimmon trees have larger leaf size which determines higher canopy resistance allowing for higher increases in canopy temperature in response to water stress via stomatal closure.3

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“…At the beginning of the experiment, trees had a canopy ground cover of 39% of the soil surface area allotted per tree. Other orchard characteristics are described in Badal et al (2010).…”

Section: Persimmon Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Usefulness of thermography for plant water stress detection in citrus and persimmon trees

Ballester

Jiménez-Bello

Castel

et al. 2013

Agricultural and Forest Meteorology

Self Cite

124

View full text Add to dashboard Cite

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“…The statistical design was a complete randomised block with three replicate plots per treatment and 6-7 sampling trees per replicate. Other details about the orchard design and treatments lay out can be found in Badal et al (2010). …”

Section: -Introductionmentioning

confidence: 99%

Development and validation of an automatic thermal imaging process for assessing plant water status

Jiménez-Bello

Ballester

Castel

et al. 2011

Agricultural Water Management

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Leaf temperature is a physiological trait that can be used for monitoring plant water status. Nowadays, by means of thermography, canopy temperature can be remotely determined. In this sense, it is crucial to automatically process the images. In the present work, a methodology for the automatic analysis of frontal images taken on individual trees was developed. The procedure can be used when cameras take at the same time thermal and visible scenes, so it is not necessary to reference the images. In this way, during the processing in batch, no operator participated. The procedure was developed by means of a non supervised classification of the visible image from which the presence of sky and soil could be detected. In case of existence, a mask was performed for the extraction of intermediate pixels to calculate canopy temperature by means of the thermal image. At the same time, sunlit and shady leaves could be detected and isolated. Thus, the procedure allowed to separately determine canopy temperature either of the more exposed part of the canopy or of the shaded portion. The methodology developed was validated using images taken in several regulated deficit irrigation trials in Persimmon and two citrus cultivars (Clementina de Nules and Navel Lane-Late).Overall, results indicated that similar canopy temperatures were calculated either by means of the automatic process or the manual procedure. The procedure developed allows to drastically reduce the time needed for image analysis also considering that no operator participation was required. This tool will facilitate further investigations in course for assessing the feasibility of thermography for detecting plant water status in woody perennial crops with discontinuous canopies. Preliminary results reported indicate that the type of crop evaluated has an important influence in the results obtained from termographic imagery. Thus, in Persimmon trees there were good 3 correlations between canopy temperature and plant water status while, in Clementina de Nules and Navel Lane-Late citrus cultivars canopy temperature differences among trees could not be related with tree-to-tree variation in plant water status.

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“…A common alternative is the use of stem diameter variations (SDV) and derived indexes. These last indexes are calculated based on easy, affordable and automatable measurements made with linear variable displacement transducers (LVDT, e.g., [9][10][11][12][13]). …”

Section: Introductionmentioning

confidence: 99%

Plant Water Status Indicators for Irrigation Scheduling Associated with Iso- and Anisohydric Behavior: Vine and Plum Trees

et al. 2017

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Plant water status indicators have been increasingly used for scheduling irrigation. Different variables may be used to do this, depending on personal preferences and the resources available. Many studies have suggested that selection of an indicator should take into account plant behavior in relation to isohydricity. In two Iberian studies, deficit irrigation (DI) was applied in a vineyard and in a plum orchard while plant water status and fluxes were monitored. These case-studies are discussed with special focus on the use of predawn leaf water potential (Ψ pd ) versus stem water potential (Ψ st ) to determine whether Ψ st performed better and would therefore be the preferred stress indicator for plants exhibiting anisohydric behavior. In contrast, in plants with isohydric behavior, Ψ pd would be generally preferred. This hypothesis seems to be supported by the present results obtained and by prior studies. The cultivars used and the intensity of stress applied have an important influence on the results. This suggests that, if no specific information is available from the existing literature, daily preliminary studies would be recommended prior to application in order to select the most appropriate plant water stress indicators.

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Maximum diurnal trunk shrinkage is a sensitive indicator of plant water, stress in Diospyros kaki (Persimmon) trees

Cited by 33 publications

References 19 publications

Usefulness of thermography for plant water stress detection in citrus and persimmon trees

Usefulness of thermography for plant water stress detection in citrus and persimmon trees

Development and validation of an automatic thermal imaging process for assessing plant water status

Plant Water Status Indicators for Irrigation Scheduling Associated with Iso- and Anisohydric Behavior: Vine and Plum Trees

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