Electrotonic and action potentials in the Venus flytrap

Volkov, Alexander G.; Vilfranc, Chrystelle L.; Murphy, Veronica; Mitchell, Colee M.; Volkova, Maia I.; O’Neal, Lawrence; Markin, Vladislav S.

doi:10.1016/j.jplph.2013.01.009

Cited by 42 publications

(31 citation statements)

References 27 publications

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“…It is quite surprising that the Venus flytrap generated APs instead of VPs, which have been believed to be generated in response to damaging stimuli (Fromm & Lautner, ). It is known that APs triggered by mechanical stimulation do not even penetrate to the photosynthetic part of the leaf in the Venus flytrap, so these two parts of the leaf are probably electrically independent (Volkov et al ., , , ). Only graded potentials, which have very low amplitude, were recorded in the photosynthetic part of the leaf (Fig.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

confidence: 99%

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

2017

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“…Nonetheless, Dionaea has evolved a highly specialized trap for hunting animals (Volkov et al 2013), and profound morphological features distinguish the trap-forming leaf tip from the leaf base (petiole). These features can be attributed to trap-specific functions, namely, the need to catch and digest prey and, subsequently, the absorption of released nutrients.…”

Section: The Molecular Composition Of the Trapmentioning

confidence: 99%

Venus flytrap carnivorous lifestyle builds on herbivore defense strategies

et al. 2016

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Although the concept of botanical carnivory has been known since Darwin's time, the molecular mechanisms that allow animal feeding remain unknown, primarily due to a complete lack of genomic information. Here, we show that the transcriptomic landscape of the Dionaea trap is dramatically shifted toward signal transduction and nutrient transport upon insect feeding, with touch hormone signaling and protein secretion prevailing. At the same time, a massive induction of general defense responses is accompanied by the repression of cell death–related genes/processes. We hypothesize that the carnivory syndrome of Dionaea evolved by exaptation of ancient defense pathways, replacing cell death with nutrient acquisition.

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“…The two main electrical signals that are found in plants are action potentials (APs) and variation potentials (VPs). While APs are rapid signals that are induced by non-damaging stimuli5, VPs are slower signals that are induced by damaging stimuli67 (e.g., burning and cutting). Indeed, VPs are sometimes called slow-wave potentials because their transmission speed is typically slower than that of APs8.…”

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confidence: 99%

Spatio-temporal mapping of variation potentials in leaves of Helianthus annuus L. seedlings in situ using multi-electrode array

Zhao

Wang

Huang

et al. 2014

Sci Rep

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Damaging thermal stimuli trigger long-lasting variation potentials (VPs) in higher plants. Owing to limitations in conventional plant electrophysiological recording techniques, recorded signals are composed of signals originating from all of the cells that are connected to an electrode. This limitation does not enable detailed spatio-temporal distributions of transmission and electrical activities in plants to be visualised. Multi-electrode array (MEA) enables the recording and imaging of dynamic spatio-temporal electrical activities in higher plants. Here, we used an 8 × 8 MEA with a polar distance of 450 μm to measure electrical activities from numerous cells simultaneously. The mapping of the data that were recorded from the MEA revealed the transfer mode of the thermally induced VPs in the leaves of Helianthus annuus L. seedlings in situ. These results suggest that MEA can enable recordings with high spatio-temporal resolution that facilitate the determination of the bioelectrical response mode of higher plants under stress.

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Electrotonic and action potentials in the Venus flytrap

Cited by 42 publications

References 27 publications

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

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

Venus flytrap carnivorous lifestyle builds on herbivore defense strategies

Spatio-temporal mapping of variation potentials in leaves of Helianthus annuus L. seedlings in situ using multi-electrode array

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