Production, amplification and systemic propagation of redox messengers in plants? The phloem can do it all!

Gaupels, Frank; Durner, Jörg; Kogel, Karl‐Heinz

doi:10.1111/nph.14399

Cited by 55 publications

(25 citation statements)

References 49 publications

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“…Calcium (Ca 2+ ) is also actively involved in intra-and extra-cellular signaling networks [10]. Ca 2+ and ROS signaling interactions are considered to be bidirectional, as Ca 2+ is necessary for ROS production, while ROS is primarily required for the regulation of cellular Ca 2+ [11,12]. Stressed plant cells transduce signals via redox sensitive proteins and reversible redox reactions [13].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Subcellular ROS and NO Metabolism in Higher Plants: Multifunctional Signaling Molecules

et al. 2019

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Reactive oxygen species (ROS) and nitric oxide (NO) are produced in all aerobic life forms under both physiological and adverse conditions. Unregulated ROS/NO generation causes nitro-oxidative damage, which has a detrimental impact on the function of essential macromolecules. ROS/NO production is also involved in signaling processes as secondary messengers in plant cells under physiological conditions. ROS/NO generation takes place in different subcellular compartments including chloroplasts, mitochondria, peroxisomes, vacuoles, and a diverse range of plant membranes. This compartmentalization has been identified as an additional cellular strategy for regulating these molecules. This assessment of subcellular ROS/NO metabolisms includes the following processes: ROS/NO generation in different plant cell sites; ROS interactions with other signaling molecules, such as mitogen-activated protein kinases (MAPKs), phosphatase, calcium (Ca2+), and activator proteins; redox-sensitive genes regulated by the iron-responsive element/iron regulatory protein (IRE-IRP) system and iron regulatory transporter 1(IRT1); and ROS/NO crosstalk during signal transduction. All these processes highlight the complex relationship between ROS and NO metabolism which needs to be evaluated from a broad perspective.

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Section: Introductionmentioning

confidence: 99%

Assessment of Subcellular ROS and NO Metabolism in Higher Plants: Multifunctional Signaling Molecules

et al. 2019

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“…In turn, plant water fluxes are driven by the moisture gradient between the soil and the atmosphere, controlled through a fine-tuned regulation of root water uptake (RWU), xylem transport and stomatal control of transpirational water loss, which is mediated by rapid signalling between all plant organs (e.g. Gaupels et al, 2017). The pivotal role of plants in the hydrological cycle has long been recognized (e.g.…”

Section: Introductionmentioning

confidence: 99%

Water fluxes mediated by vegetation: emerging isotopic insights at the soil and atmosphere interfaces

Dubbert

Werner

2018

New Phytologist

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Summary Plants mediate water fluxes within the soil–vegetation–atmosphere continuum. This water transfer in soils, through plants, into the atmosphere can be effectively traced by stable isotopologues of water. However, rapid dynamic processes have only recently gained attention, such as adaptations in root water uptake depths (within hours to days) or the imprint of transpirational fluxes on atmospheric moisture, particularly promoted by the development of real‐time in‐situ water vapour stable isotope observation techniques. We focus on open questions and emerging insights at the soil–plant and plant–atmosphere interfaces, as we believe that these are the controlling factors for ecosystem water cycling. At both interfaces, complex pictures of interacting ecophysiological and hydrological processes emerge: root water uptake dynamics depend on both spatiotemporal variations in water availability and species‐specific regulation of adaptive root conductivity within the rooting system by, for example, modulating soil–root conductivity in response to water and nutrient demands. Similarly, plant water transport and losses are a fine‐tuned interplay between species‐specific structural and functional strategies of water use and atmospheric processes. We propose that only by explicitly merging insights from distinct disciplines – for example, hydrology, plant physiology and atmospheric sciences – will we gain a holistic picture of the impact of vegetation on processes governing the soil–plant–atmosphere continuum.

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“…It has been suggested that the events leading to jasmonate accumulation distal to the wound (systemic response) can be reduced by two principal mechanisms: the transport of jasmonates between cells (cell-nonautonomous pathway typical for family Solanaceae; Schilmiller & Howe, 2005;Wasternack et al, 2006) and a rapid electrical, hydraulic or chemical signal that triggers JA synthesis in distal leaves (autonomous pathway typical for the model plant Arabidopsis, Glauser et al, 2008;Mousavi et al, 2013;Farmer et al, 2014;Gaupels et al, 2017). Moreover, both pathways may work synergistically to optimize the spatial and temporal expression of defence responses Huber & Bauerle, 2016).…”

Section: Introductionmentioning

confidence: 99%

Triggering a false alarm: wounding mimics prey capture in the carnivorous Venus flytrap (Dionaea muscipula)

2017

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In the carnivorous plant Venus flytrap (Dionaea muscipula), the sequence of events after prey capture resembles the well-known plant defence signalling pathway in response to pathogen or herbivore attack. Here, we used wounding to mimic prey capture to show the similarities and differences between botanical carnivory and plant defence mechanisms. We monitored movement, electrical signalling, jasmonate accumulation and digestive enzyme secretion in local and distal (systemic) traps in response to prey capture, the mechanical stimulation of trigger hairs and wounding. The Venus flytrap cannot discriminate between wounding and mechanical trigger hair stimulation. Both induced the same action potentials, rapid trap closure, hermetic trap sealing, the accumulation of jasmonic acid (JA) and its isoleucine conjugate (JA-Ile), and the secretion of proteases (aspartic and cysteine proteases), phosphatases and type I chitinase. The jasmonate accumulation and enzyme secretion were confined to the local traps, to which the stimulus was applied, which correlates with the propagation of electrical signals and the absence of a systemic response in the Venus flytrap. In contrast to plant defence mechanisms, the absence of a systemic response in carnivorous plant may represent a resource-saving strategy. During prey capture, it could be quite expensive to produce digestive enzymes in the traps on the plant without prey.

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Production, amplification and systemic propagation of redox messengers in plants? The phloem can do it all!

Cited by 55 publications

References 49 publications

Assessment of Subcellular ROS and NO Metabolism in Higher Plants: Multifunctional Signaling Molecules

Assessment of Subcellular ROS and NO Metabolism in Higher Plants: Multifunctional Signaling Molecules

Water fluxes mediated by vegetation: emerging isotopic insights at the soil and atmosphere interfaces

Triggering a false alarm: wounding mimics prey capture in the carnivorous Venus flytrap (Dionaea muscipula)

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