Water Consumption in Grapevines: Influence of Leaf Area and Irrigation

Campo, María Gómez del; Ruiz, C.; Sotés, Vicente; Lissarrague, J.R.

doi:10.17660/actahortic.1999.493.27

Cited by 6 publications

(6 citation statements)

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“…For the IRR 30% vines leaf area showed an initial 14% increase during the early 9 DADI, then it remained stable for a week before a final decline toward the lowest value of 1,970 cm 2 p −1 (21 DADI) likely due to an initial defoliation triggered by drought stress. The influence of the irrigation treatment on leaf area growth estimated through LA' is consistent with Campo et al (1999).…”

Section: Rgb-image Based Morphometric and Colorimetric Indexessupporting

confidence: 72%

Image-Based Assessment of Drought Response in Grapevines

Briglia

Williams

et al. 2020

Front. Plant Sci.

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Many plants can modify their leaf profile rapidly in response to environmental stress. Image-based data are increasingly used to retrieve reliable information on plant water status in a non-contact manner that has the potential to be scaled to high-throughput and repeated through time. This paper examined the variation of leaf angle as measured by both 3D images and goniometer in progressively drought stressed grapevine. Grapevines, grown in pots, were subjected to a 21-day period of drought stress receiving 100% (CTRL), 60% (IRR 60%) and 30% (IRR 30%) of maximum soil available water capacity. Leaf angle was (i) measured manually (goniometer) and (ii) computed by a 3D reconstruction method (multi-view stereo and structure from motion). Stomatal conductance, leaf water potential, fluorescence (F v /F m), leaf area and 2D RGB data were simultaneously collected during drought imposition. Throughout the experiment, values of leaf water potential ranged from −0.4 (CTRL) to −1.1 MPa (IRR 30%) and it linearly influenced the leaf angle when measured manually (R 2 = 0.86) and with 3D image (R 2 = 0.73). Drought was negatively related to stomatal conductance and leaf area growth particularly in IRR 30% while photosynthetic parameters (i.e., F v /F m) were not impaired by water restriction. A model for leaf area estimation based on the number of pixels of 2D RGB images developed at a different phenotyping robotized platform in a closely related experiment was successfully employed (R 2 = 0.78). At the end of the experiment, top view 2D RGB images showed a ∼50% reduction of greener fraction (GGF) in CTRL and IRR 60% vines compared to initial values, while GGF in IRR 30% increased by approximately 20%.

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Section: Rgb-image Based Morphometric and Colorimetric Indexessupporting

confidence: 72%

Image-Based Assessment of Drought Response in Grapevines

Briglia

Williams

et al. 2020

Front. Plant Sci.

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“…In more recent literature, Williams and Ayars (2005) showed a linear relationship between the crop coefficient over shaded area and the total LA in grapevine. This was also confirmed by Gómez del Campo et al (1998) in grapevine and by Testi et al (2004) in olive trees and used in the FAO Irrigation and Drainage Paper No. 56, as mentioned later.…”

Section: Relationship With Crop Coefficientsupporting

confidence: 60%

Assessment of Vegetation Parameters in Olive Trees in the Region of Alentejo: A Comparison of Direct and Indirect Methods

Häusler¹,

Ferreira²,

Conceição³

2014

Acta Hortic.

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Vegetation parameters, as the leaf area index (LAI) and the ground cover (GC) are commonly related to biosphere processes, being used in models to estimate yield and crop water requirements. Several direct and indirect methods have been developed in the past decades to determine the LAI. However, a simple approach to assess this parameter is still missing. In this study we tested the operability and precision of different methods to calculate the LAI of 6 and 20 year old olive trees (Arbequina and Cobrançosa), under irrigated and non-irrigated conditions in the region of Alentejo. The average LAI on a projected area basis was estimated to be 5.88 and 2.75 m 2 m -2 at the irrigated and non-irrigated sites, respectively, corresponding to 1.01 and 1.05 m 2 m -2 on a total area basis. Furthermore, a tool was introduced to simplify the decision making between the use of the LAI and the GC. The determination of the GC is much easier than the LAI in practical uses. The average GC was 5.7 m 2 under irrigated and 18.0 m 2 under nonirrigated conditions. A detailed comparison between direct and indirect methods is given and the future prospective of the decision making tool is discussed.

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“…Lightly pruned vines tend to develop a larger canopy (i.e., leaf area) early in the season that effectively intercepts more sunlight (Weyand and Schultz 2006). However, this increases not only whole-vine photosynthesis but also transpiration rates (Gómez del Campo et al 1999), making such vines more vulnerable to water stress. Nevertheless, despite the two very warm seasons (1617GDD in 2003and 1543GDD in 2004 leading to high evapotranspiration rates (1074 mm in 2003 and 1004 mm in 2004), most of the minimally pruned vines with high shoot and cluster numbers showed no signs of water stress later in the season.…”

Section: Resultsmentioning

confidence: 99%

Effect of Pruning on Recovery and Productivity of Cold-Injured Merlot Grapevines

Keller¹,

Mills²

2007

Am J Enol Vitic.

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A field experiment was conducted to determine effects of pruning time and bud number on vine recovery and performance following cold injury to trunk tissues. Own-rooted Merlot grapevines planted in 1999 and trained to a bilateral cordon with vertical shoot-positioning were pruned in 2003 and 2004 as follows: prebudbreak spur pruning, postbudbreak spur pruning, prebudbreak spur pruning with late repruning (double pruning), minimal pruning, and minimal pruning with disbudding of all nodes. On average, 25% of buds were killed by cold temperatures in late fall. Trunk injury, rated as tissue browning on adjacent vines, varied from 20 to 100% phloem injury with little xylem injury. Phloem injury had virtually no effect on budbreak, growth, fruiting, and fruit composition in the two following seasons. Differences in bud number per vine due to pruning treatment led primarily to equivalent differences in shoot numbers, cluster numbers, and yield. Minimal pruning resulted in the highest yield in both seasons, while double pruning and disbudding resulted in the lowest, but even disbudded vines grew fruitful shoots from basal and latent buds. Overall yields were low and fruit composition was unaffected by the pruning treatment, although soluble solids was negatively correlated with yield. Despite the two warm seasons, most of the vines, including those with high shoot and cluster numbers, did not collapse later in the season. Results indicate that pruning time and bud number did not influence vine survival and recovery from cold injury and had little effect on subsequent growth and vine performance.

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Water Consumption in Grapevines: Influence of Leaf Area and Irrigation

Cited by 6 publications

References 0 publications

Image-Based Assessment of Drought Response in Grapevines

Image-Based Assessment of Drought Response in Grapevines

Assessment of Vegetation Parameters in Olive Trees in the Region of Alentejo: A Comparison of Direct and Indirect Methods

Effect of Pruning on Recovery and Productivity of Cold-Injured Merlot Grapevines

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