A novel crop water analysis system: identification of water stress tolerant genotypes of canola (<i><scp>B</scp>rassica napus </i><scp>L</scp>.) using non‐invasive magnetic turgor pressure probes

Kant, Surya; Burch, David; Ehrenberger, W.; Bitter, Rebecca; Rüger, S.; Mason, John G.; Zimmermann, U.; Spangenberg, Germán

doi:10.1111/pbr.12187

Cited by 13 publications

(11 citation statements)

References 20 publications

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“…Other effects of the environmental conditions and plant hydraulic functioning on the performance of the ZIM probe, were detailed by Zimmermann et al [163]. The ZIM system has been tested in a variety of forest tree species [165], grapevines [166,167], and grapefruit [167], banana [168], persimmon [169] and olive trees [49,[170][171][172], as well as in herbaceous crops such as tomato [173], canola [174] and wheat [175,176]. Also, comparative studies of the ZIM system vs. Scholander-type chambers have been made by Westhoff et al [166] for grapevines, by Rüger et al [165] for eucalyptus, avocado, grapefruit, beech and oak, and by Ben-Gal et al [170] and Fernández et al [49] for olive.…”

Section: Leaf Turgor Pressurementioning

confidence: 99%

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Fernández

2017

Horticulturae

131

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Abstract:The increasing world population and expected climate scenarios impel the agricultural sector towards a more efficient use of water. The scientific community is responding to that challenge by developing a variety of methods and technologies to increase crop water productivity. Precision irrigation is intended to achieve that purpose, through the wise choice of the irrigation system, the irrigation strategy, the method to schedule irrigation, and the production target. In this review, the relevance of precision irrigation for a rational use of water in agriculture, and methods related to the use of plant-based measurements for both the assessment of plant water stress and irrigation scheduling, are considered. These include non-automated, conventional methods based on manual records of plant water status and gas exchange, and automated methods where the related variable is recorded continuously and automatically. Thus, the use of methodologies based on the Scholander chamber and portable gas analysers, as well as those of systems for measuring sap flow, stem diameter variation and leaf turgor pressure, are reviewed. Other methods less used but with a potential to improve irrigation are also considered. These include those based on measurements related to the stem and leaf water content, and to changes in electrical potential within the plant. The use of measurements related to canopy temperature, both for direct assessment of water stress and for defining zones with different irrigation requirements, is also addressed. Finally, the importance of choosing the production target wisely, and the need for economic analyses to obtain maximum benefit of the technology related to precision irrigation, are outlined.

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Section: Leaf Turgor Pressurementioning

confidence: 99%

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Fernández

2017

Horticulturae

131

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“…In addition to the fact that the use of a magnetic probe can reveal water dynamics in a plant, it has been assumed that it helps to evaluate possible methodological errors performed in the past (Zimmermann et al, 2008). Thus, the employment of a probe constitutes a useful technique for assessing plant water condition (Bramley et al, 2013;Kant et al;2014;Fernandez, 2014). So, in our research, was applied the LCPC (leaf patch clamp pressure) technique, introduced by Zimmermann et al (2008).…”

Section: Introductionmentioning

confidence: 99%

“…The magnitude of the leaf pressure transfer function and thus the attenuation of the constant external pressure, is dictated by a plant-specific, turgor pressure-independent term and a turgor pressure-dependent term (Westhoff et al, 2009). The behavior of many plants, like banana , olives (Fernandez et al, 2011;Ben-Gal et al, 2010), wheat (Bramley et al, 2013), grapevines , canola (Kant et al, 2014) and oak (Ehrenberger et al, 2012) were tested and concluded that this technique have highly precision to measure water status in intact plants. However, there is no observation for maize yet.…”

Section: Introductionmentioning

confidence: 99%

Leaf turgor pressure in maize plants under water stress

Riboldi¹,

Oliveira²,

Angelocci³

2016

Aust J Crop Sci

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Maize grown is affected by water stress reducing photosynthetic rate and availability of water in its tissues, decreasing plant yield. Monitoring plant water potential is an important indicator of the degree of water stress. With the new magnetic probe for determining leaf turgidity, it is possible to evaluate the water status of the plant and, in some cases, to indicate the optimal relative tolerance to water stress. The union of new and old approaches gives us a better knowledge of water relations in plats. Therefore, the aim of this study was to understand the behavior of maize plants subjected to water stress, using novel and conventional approaches. Maize plants were grown in pots in a greenhouse for 45 days. After this period, plants were subjected to water stress, where turgor measurements expressed by the variable Pp (patch pressure) were monitored. In addition, the leaf water potential, stomatal conductance, CO 2 assimilation, transpiration rate, and variable growth (height, leaf area and dry weight) had been monitored for 30 days. Two treatments were conducted, one in which the plant was irrigated and the other one in which irrigation was fully suspended for a period of time and monitored the water status. As the days passed, the plants showed the first visual signs of stress like leaf rolling. During this period, we observed fluctuating Pp values throughout the day, but with a recovery of turgor at night. There were significant differences between treatments for stomatal conductance, water potential, photosynthesis, and Pp, mainly before irrigation. After each irrigation, there has been a rapid recovery in all parameters. There was five periods of stress and it is possible to see a pattern of decreasing and increasing the Pp as the advance of stress, mainly in the last two. Maize plants had a big resilience in water stress conditions, due to mechanisms of water loss mitigation, like leaf rolling and possibly osmotic adjustment. Thus, it was concluded that Pp introduced a new approach to study plants subjected to water stress and it is a complement to other variables as CO 2 assimilation rate, stomatal conductance, transpiration rate, and leaf water potential.

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“…The usefulness of the Yara ZIM-probe to detect plant water stress has been studied on several horticultural and fruit crops, providing evidence that it can detect changes in turgor pressure caused by variations in the microclimate or in the soil water availability (Westhoff et al 2008;Zimmermman et al 2009;Rüger et al 2010Rüger et al , 2011Ehrenberger et al 2012;Fernández et al 2011;Rodriguez-Dominguez et al 2012). Moreover, some studies suggest that its use has the potential for efficiently select genotypes tolerant to water stress environments (Kant et al 2014). Different approaches such as the assessment of the daily or nightly maximum P p value, the turgor recovery phase during the afternoon or the reverse of the P p curve, however, must be followed to determine the degree of stress reached by the plants depending on their physiological characteristics and their tolerance or sensitivity to drought stress, which makes necessary the assessment of this technology for each particular case.…”

Section: Introductionmentioning

confidence: 99%