Effects of Drought Stress on Chlorophyll Fluorescence and Photosynthetic Pigments in Grapevine Leaves (Vitis Vinifera Cv. 'White Riesling')

Zulini, L.; Rubinigg, Michael; Zorer, R.; Bertamini, M.

doi:10.17660/actahortic.2007.754.37

Cited by 43 publications

(27 citation statements)

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“…Leaf pigment development is affected by water stress, as was concluded by Zulini et al [27]. However, that development is affected after an extended period of water stress [27]. This is in accordance with the obtained results, where GNDVI decreased when water stress was prolonged between 80 and 44 DBH.…”

Section: Vegetation Indices and Crop Water Status Assessmentsupporting

confidence: 90%

“…There was no statistical difference among deficit irrigated treatments when GNDVI data were compared according to the type (continuous or pulse) or depth of irrigation ( Figure 7). Leaf pigment development is affected by water stress, as was concluded by Zulini et al [27]. However, that development is affected after an extended period of water stress [27].…”

Section: Vegetation Indices and Crop Water Status Assessmentmentioning

confidence: 84%

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High Resolution Multispectral and Thermal Remote Sensing-Based Water Stress Assessment in Subsurface Irrigated Grapevines

et al. 2017

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Precision irrigation management is based on the accuracy and feasibility of sensor data assessing the plant water status. Multispectral and thermal infrared images acquired from an unmanned aerial vehicle (UAV) were analyzed to evaluate the applicability of the data in the assessment of variants of subsurface irrigation configurations. The study was carried out in a Cabernet Sauvignon orchard located near Benton City, Washington. Plants were subsurface irrigated at a 30, 60, and 90 cm depth, with 15%, 30%, and 60% irrigation of the standard irrigation level as determined by the grower in commercial production management. Half of the plots were irrigated using pulse irrigation and the other half using continuous irrigation techniques. The treatments were compared to the control plots that received standard surface irrigation at a continuous rate. The results showed differences in fruit yield when the control was compared to deficit irrigated treatments (15%, 30%, 60% of standard irrigation), while no differences were found for comparisons of the techniques (pulse, continuous) or depths of irrigation (30, 60, 90 cm). Leaf stomatal conductance of control and 60% irrigation treatments were statistically different compared to treatments receiving 30% and 15% irrigation. The normalized difference vegetation index (NDVI), green normalized difference vegetation index (GNDVI), and canopy temperature were correlated to fruit yield and leaf stomatal conductance. Significant correlations (p < 0.01) were observed between NDVI, GNDVI, and canopy temperature with fruit yield (Pearson's correlation coefficient, r = 0.68, 0.73, and −0.83, respectively), and with leaf stomatal conductance (r = 0.56, 0.65, and −0.63, respectively) at 44 days before harvest. This study demonstrates the potential of using low-altitude multispectral and thermal imagery data in the assessment of irrigation techniques and relative degree of plant water stress. In addition, results provide a feasibility analysis of our hypothesis that thermal infrared images can be used as a rapid tool to estimate leaf stomatal conductance, indicative of the spatial variation in the vineyard. This is critically important, as such data will provide a near real-time crop stress assessment for better irrigation management/scheduling in wine grape production.

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Section: Vegetation Indices and Crop Water Status Assessmentsupporting

confidence: 90%

Section: Vegetation Indices and Crop Water Status Assessmentmentioning

confidence: 84%

High Resolution Multispectral and Thermal Remote Sensing-Based Water Stress Assessment in Subsurface Irrigated Grapevines

et al. 2017

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“…All of these traits showed improvement followed by the application of these endophytes in consortium. The increase in flag leaf area is possible due to the positive effects of endophytes on photosynthesis through production/stimulation of specific phytohormone(s) associated with leaf development (Zulini et al, 2007). This increase in leaf area would positively affect the productivity of wheat as FLA has been reported to be positively associated with grain yield (Ali et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Consortium Application of Endophytic Bacteria and Fungi Improves Grain Yield and Physiological Attributes in Advanced Lines of Bread Wheat

Muhae-Ud-Din¹,

Ali²,

Naveed³

et al. 2018

Turkish JAF Sci.Tech.

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Increasing human population places pressure on agriculture. To feed this population, two time increase in the current wheat production is needed. Today agriculture is becoming input intensive with more reliance on synthetic fertilizers and agrochemicals to fulfil the feed demand of the growing numbers. Use of synthetic fertilizer since last few years is impacting the soil quality. In this scenario, the use of beneficial endophytic microbes is an attractive strategy to overcome the use of synthetic products. To investigate the effect of consortium application of endophytic bacteria and fungus on plant growth, grain yield moisture status, a pot experiment was conducted in different wheat lines. It comprised four treatments like control, application of bacterial strain Bacillus sp. MN54, fungal strain Trichoderma sp. MN6, and their consortium (Bacillus sp. MN54 + Trichoderma sp. MN6). The effect of consortium application was more prominent and significantly different from the sole application of bacteria and fungus. The results showed that with a consortium application of endophytic bacteria and fungus, there was 28.6, 4.3, -6.3 and -3.7% increases in flag leaf area, chlorophyll content, relative membrane permeability and water content respectively. Consortia of endophytic microbes also resulted in the yield enhancement through the betterment of various yield attributes like number of spikelet's, grains per spike and grain yield per plant (32.2, 25.8 and 30.8%, respectively). So, consortia of endophytic microbes can greatly promote the progress of plants in dry land agriculture and increase the yield in an environmentally sustainable way.

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“…Curvas similares a las encontradas en este estudio, pero en V. vinifera cv. White Riesling, fueron descritas por Zulini et al (2007), observándose una disminución de clorofila (medida como unidades SPAD) a medida que las hojas se acercan al ápice. Las hojas más basales presentaron los mayores índices de CCI a una misma fecha de evaluación, aumentando el contenido de clorofila hasta la evaluación de octubre.…”

Section: Variación En Las Mediciones a Lo Largo De La Temporadaunclassified

Evaluación de un método no destructivo para estimar las concentraciones de clorofila en hojas de variedades de uva de mesa

Callejas

Kania

Contreras

et al. 2013

Idesia

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Effects of Drought Stress on Chlorophyll Fluorescence and Photosynthetic Pigments in Grapevine Leaves (Vitis Vinifera Cv. 'White Riesling')

Cited by 43 publications

References 0 publications

High Resolution Multispectral and Thermal Remote Sensing-Based Water Stress Assessment in Subsurface Irrigated Grapevines

High Resolution Multispectral and Thermal Remote Sensing-Based Water Stress Assessment in Subsurface Irrigated Grapevines

Consortium Application of Endophytic Bacteria and Fungi Improves Grain Yield and Physiological Attributes in Advanced Lines of Bread Wheat

Evaluación de un método no destructivo para estimar las concentraciones de clorofila en hojas de variedades de uva de mesa

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