Distribution and function of epistomatal mucilage plugs

Westhoff, M.; Zimmermann, D.; Zimmermann, G.; Geßner, P.; Wegner, Lars H.; Bentrup, Friedrich‐Wilhelm; Zimmermann, U.

doi:10.1007/s00709-008-0029-0

Cited by 24 publications

(21 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2007) for several tall tree species. A related study, including gymnosperms, revealed that three species of Araucaria ( A. bidwillii , A. robusta and A. cunnighamii ) have numerous epistomatal mucilage plugs (Westhoff et al. 2009).…”

Section: Introductionmentioning

confidence: 99%

The periodic wetting of leaves enhances water relations and growth of the long‐lived conifer Araucaria angustifolia

Cassana

Dillenburg

2012

Plant Biology

View full text Add to dashboard Cite

The importance of foliar absorption of water and atmospheric solutes in conifers was recognised in the 1970s, and the importance of fog as a water source in forest environments has been recently demonstrated. Araucaria angustifolia (Araucariaceae) is an emergent tree species that grows in montane forests of southern Brazil, where rainfall and fog are frequent events, leading to frequent wetting of the leaves. Despite anatomical evidence in favour of leaf water absorption, there is no information on the existence and physiological significance of a such process. In this study, we test the hypothesis that the use of atmospheric water by leaves takes place and is physiologically relevant for the species, by comparing growth, water relations and nutritional status between plants grown under two conditions of soil water (well-watered and water-stressed plants) and three types of leaf spraying (none, water and nutrient solution spray). Leaf spraying had a greater effect in improving plant water relations when plants were under water stress. Plant growth was more responsive to water available to the leaves than to the roots, and was equally increased by both types of leaf spraying, with no interaction with soil water status. Spraying leaves with nutrient solution increased shoot ramification and raised the concentrations of N, P, K, Zn, Cu and Fe in the roots. Our results provide strong indications that water and nutrients are indeed absorbed by leaves of A. angustifolia, and that this process might be as important as water uptake by its roots.

show abstract

Section: Introductionmentioning

confidence: 99%

The periodic wetting of leaves enhances water relations and growth of the long‐lived conifer Araucaria angustifolia

Cassana

Dillenburg

2012

Plant Biology

View full text Add to dashboard Cite

show abstract

“…Arabidopsis thaliana) are investigated. It also leads to erroneous results if the xylem vessels contain gel-like compounds (mucopolysaccharides) and/or the leaves contain mucilage containing epistomatal plugs by which water loss and moisture uptake from the atmosphere is regulated (Zimmermann et al 2004, 2007, Westhoff et al 2009b. Excessive overpressures are needed to squeeze out water from mucilage-containing leafy twigs.…”

Section: Magnetic Probe Versus Pressure Chamber Measurementsmentioning

confidence: 99%

“…Electric potential changes have also been detected recently between the base of the stem and upper leaf of avocado trees (Persea americana) in response to drought, irrigation and diurnal light/dark regimes (Fromm 2006, Davies 2006, Gurovich and Hermosilla 2009). Gurovich and others discuss propagation of the electric signals through the tree, but ignore that pressure propagation through the xylem vessels and tissue is most likely the primary event that leads subsequently to electrical changes on the cellular level (see also Westhoff et al 2008Westhoff et al , 2009b. No doubt, concomitant probe and electrical potential measurements will contribute to the elucidation of signals causing stomata closure, i.e., primary hydraulic event and the secondary electrical responses.…”

Section: Effects Of Stomata Aperture Oscillations On Turgor Pressurementioning

confidence: 99%

A non-invasive plant-based probe for continuous monitoring of water stress in real time: a new tool for irrigation scheduling and deeper insight into drought and salinity stress physiology

Zimmermann¹,

Bitter²,

Marchiori³

et al. 2013

Theor. Exp. Plant Physiol.

View full text Add to dashboard Cite

ABSTRACT:The non-invasive, magnetic leaf patch clamp pressure probe (also termed ZIM-probe) allows for the first time to measure continuously turgor pressure changes of plant leaves over long periods of time with high precision and in real time. The probe has become an important tool in plant physiology, molecular biology and ecology, but also in agriculture because the probe is very robust and user-friendly. Growers receive the information about the water status of their plants by wireless telemetry, mobile network and internet on an as-needed basis and can thus adjust very precisely both the timing of irrigation and the quantity of water to apply. Effects of air and leaf temperature, relative humidity, illumination and wind on turgor pressure can be monitored very sensitively both under indoor and outdoor conditions. Even the effects of blue and red light as well as of oscillations of stomata aperture on turgor pressure can be monitored by the probe with high sensitivity. Similarly, water deficit due to increase of the osmotic pressure in the nutrition The applications of the magnetic probe are numerous and one can expect highly interesting developments in plant water relations in the nearest future.

show abstract

“…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. These studies showed that the ZIM system is robust, relatively inexpensive, and suitable for automatic and continuous recording under field conditions for long periods of time, and that it has a great potential as a water stress indicator in vineyards and fruit tree orchards.…”

Section: Leaf Turgor Pressurementioning

confidence: 99%

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Fernández

2017

Horticulturae

139

View full text Add to dashboard Cite

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.

show abstract

Distribution and function of epistomatal mucilage plugs

Cited by 24 publications

References 12 publications

The periodic wetting of leaves enhances water relations and growth of the long‐lived conifer Araucaria angustifolia

The periodic wetting of leaves enhances water relations and growth of the long‐lived conifer Araucaria angustifolia

A non-invasive plant-based probe for continuous monitoring of water stress in real time: a new tool for irrigation scheduling and deeper insight into drought and salinity stress physiology

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Contact Info

Product

Resources

About