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Venus flytrap carnivorous lifestyle builds on herbivore defense strategies.

ABSTRACT: 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.

SUBMITTER: Bemm F

PROVIDER: S-EPMC4889972 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature

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Venus flytrap carnivorous lifestyle builds on herbivore defense strategies.

Bemm Felix F Becker Dirk D Larisch Christina C Kreuzer Ines I Escalante-Perez Maria M Schulze Waltraud X WX Ankenbrand Markus M Van de Weyer Anna-Lena AL Krol Elzbieta E Al-Rasheid Khaled A KA Mithöfer Axel A Weber Andreas P AP Schultz Jörg J Hedrich Rainer R

Genome research 20160504 6

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 ...[more]

PMID: 27197216

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Dionaea secretome stimulation - Venus flytrap carnivorous lifestyle builds on herbivore defense strategies

Project description:Proteome analysis of secretion fluid of Dionaea under different stimulation condtions

2016-04-11 | PXD003480 | Pride

Action potentials induce biomagnetic fields in carnivorous Venus flytrap plants.

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| S-EPMC7809347 | biostudies-literature

Anaesthesia with diethyl ether impairs jasmonate signalling in the carnivorous plant Venus flytrap (Dionaea muscipula).

Project description:Background and aimsGeneral anaesthetics are compounds that induce loss of responsiveness to environmental stimuli in animals and humans. The primary site of action of general anaesthetics is the nervous system, where anaesthetics inhibit neuronal transmission. Although plants do not have neurons, they generate electrical signals in response to biotic and abiotic stresses. Here, we investigated the effect of the general volatile anaesthetic diethyl ether on the ability to sense potential prey or herbivore attacks in the carnivorous plant Venus flytrap (Dionaea muscipula).MethodsWe monitored trap movement, electrical signalling, phytohormone accumulation and gene expression in response to the mechanical stimulation of trigger hairs and wounding under diethyl ether treatment.Key resultsDiethyl ether completely inhibited the generation of action potentials and trap closing reactions, which were easily and rapidly restored when the anaesthetic was removed. Diethyl ether also inhibited the later response: jasmonic acid (JA) accumulation and expression of JA-responsive genes (cysteine protease dionain and type I chitinase). However, external application of JA bypassed the inhibited action potentials and restored gene expression under diethyl ether anaesthesia, indicating that downstream reactions from JA are not inhibited.ConclusionsThe Venus flytrap cannot sense prey or a herbivore attack under diethyl ether treatment caused by inhibited action potentials, and the JA signalling pathway as a consequence.

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Venus Flytrap HKT1-Type Channel Provides for Prey Sodium Uptake into Carnivorous Plant Without Conflicting with Electrical Excitability.

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Transcriptome and genome size analysis of the Venus flytrap.

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| S-EPMC4902084 | biostudies-literature

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Insect haptoelectrical stimulation of Venus flytrap triggers exocytosis in gland cells.

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Project description:This paper investigates the opening and closing mechanism for the Venus Flytrap (Dionaea muscipula). A mathematical model has been proposed to explain how the flytrap transitions between open, semi-closed, and closed states. The model accounts for the charge accumulation of action potentials, which generated by mechanical stimulation of the sensitive trigger hairs on the lobes of the flytrap. Though many studies have been reported for the Venus flytrap opening and closing mechanism, this paper attempts to explain the mechanism from nonlinear dynamics and control perspective.

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