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      Plasma-generated reactive oxygen and nitrogen species can lead to closure, locking and constriction of the Dionaea muscipula Ellis trap

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          Abstract

          Reactive oxygen and nitrogen species (RONS) can influence plant signalling, physiology and development. We have previously observed that an argon plasma jet in atmospheric air can activate plant movements and morphing structures in the Venus flytrap and Mimosa pudica similar to stimulation of their mechanosensors in vivo. In this paper, we found that the Venus flytrap can be activated by plasma jets without direct contact of plasma with the lobe, midrib or cilia. The observed effects are attributed to RONS, which are generated by argon and helium plasma jets in atmospheric air. We also found that application of H 2 O 2 or HNO 3 aqueous solutions to the midrib induces propagation of action potentials and trap closing similar to plasma effects. Control experiments showed that UV light or neutral gas flow did not induce morphing or closing of the trap. The trap closing by plasma is thus likely to be associated with the production of hydrogen peroxide by the cold plasma jet in air. Understanding plasma control of plant morphing could help design adaptive structures and bioinspired intelligent materials.

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          Most cited references54

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          How the Venus flytrap snaps.

          The rapid closure of the Venus flytrap (Dionaea muscipula) leaf in about 100 ms is one of the fastest movements in the plant kingdom. This led Darwin to describe the plant as "one of the most wonderful in the world". The trap closure is initiated by the mechanical stimulation of trigger hairs. Previous studies have focused on the biochemical response of the trigger hairs to stimuli and quantified the propagation of action potentials in the leaves. Here we complement these studies by considering the post-stimulation mechanical aspects of Venus flytrap closure. Using high-speed video imaging, non-invasive microscopy techniques and a simple theoretical model, we show that the fast closure of the trap results from a snap-buckling instability, the onset of which is controlled actively by the plant. Our study identifies an ingenious solution to scaling up movements in non-muscular engines and provides a general framework for understanding nastic motion in plants.
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            Reactive species in non-equilibrium atmospheric-pressure plasmas: Generation, transport, and biological effects

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              Dynamics of a guided streamer (‘plasma bullet’) in a helium jet in air at atmospheric pressure

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                Author and article information

                Contributors
                (View ORCID Profile)
                Journal
                Journal of The Royal Society Interface
                J. R. Soc. Interface.
                The Royal Society
                1742-5689
                1742-5662
                January 2019
                January 09 2019
                January 2019
                : 16
                : 150
                : 20180713
                Affiliations
                [1 ]Department of Chemistry and Biochemistry, Oakwood University, Huntsville, AL 35896, USA
                [2 ]Mechanical and Aerospace Engineering Department, The University of Alabama in Huntsville, Huntsville, AL 35899, USA
                [3 ]The Center for Space Plasma and Aeronomic Research, The University of Alabama in Huntsville, Huntsville, AL 35899, USA
                [4 ]CFD Research Corporation, Huntsville, AL 35806, USA
                Article
                10.1098/rsif.2018.0713
                6364641
                30958146
                f9ff92cd-c12e-4059-bb51-4840a1ee5509
                © 2019

                https://royalsociety.org/journals/ethics-policies/data-sharing-mining/

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