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Baravalle L. How (not) to Talk to a Plant: An Application of Automata Theory to Plant Communication. Acta Biotheor 2024; 72:8. [PMID: 38949721 PMCID: PMC11217117 DOI: 10.1007/s10441-024-09484-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 06/24/2024] [Indexed: 07/02/2024]
Abstract
Plants are capable of a range of complex interactions with the environment. Over the last decade, some authors have used this as evidence to argue that plants are cognitive agents. While there is no consensus on this view, it is certainly interesting to approach the debate from a comparative perspective, trying to understand whether different lineages of plants show different degrees of responsiveness to environmental cues, and how their responses compare with those of animals or humans. In this paper, I suggest that a potentially fruitful approach to these comparative studies is provided by automata theory. Accordingly, I shall present a possible application of this theory to plant communication. Two tentative results will emerge. First, that different lineages may exhibit different levels of complexity in response to similar stimuli. Second, that current evidence does not allow to infer great cognitive sophistication in plants.
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Affiliation(s)
- Lorenzo Baravalle
- Centro de Filosofia das Ciências, Departamento de História e Filosofia das Ciências, Faculdade de Ciências, Universidade de Lisboa Campo Grande, Edifício C4, 3º Piso, Sala 4.3.24, 1749-016, Lisbon, Portugal.
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2
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Wang J, Luo Y, Ye F, Ding ZJ, Zheng SJ, Qiao S, Wang Y, Guo J, Yang W, Su N. Structures and ion transport mechanisms of plant high-affinity potassium transporters. MOLECULAR PLANT 2024; 17:409-422. [PMID: 38335958 DOI: 10.1016/j.molp.2024.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/11/2024] [Accepted: 01/19/2024] [Indexed: 02/12/2024]
Abstract
Plant high-affinity K+ transporters (HKTs) mediate Na+ and K+ uptake, maintain Na+/K+ homeostasis, and therefore play crucial roles in plant salt tolerance. In this study, we present cryoelectron microscopy structures of HKTs from two classes, class I HKT1;1 from Arabidopsis thaliana (AtHKT1;1) and class II HKT2;1 from Triticum aestivum (TaHKT2;1), in both Na+- and K+-bound states at 2.6- to 3.0-Å resolutions. Both AtHKT1;1 and TaHKT2;1 function as homodimers. Each HKT subunit consists of four tandem domain units (D1-D4) with a repeated K+-channel-like M-P-M topology. In each subunit, D1-D4 assemble into an ion conduction pore with a pseudo-four-fold symmetry. Although both TaHKT2;1 and AtHKT1;1 have only one putative Na+ ion bound in the selectivity filter with a similar coordination pattern, the two HKTs display different K+ binding modes in the filter. TaHKT2;1 has three K+ ions bound in the selectivity filter, but AtHKT1;1 has only two K+ ions bound in the filter, which has a narrowed external entrance due to the presence of a Ser residue in the first filter motif. These structures, along with computational, mutational, and electrophysiological analyses, enable us to pinpoint key residues that are critical for the ion selectivity of HKTs. The findings provide new insights into the ion selectivity and ion transport mechanisms of plant HKTs and improve our understanding about how HKTs mediate plant salt tolerance and enhance crop growth.
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Affiliation(s)
- Jiangqin Wang
- International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang 322000, China
| | - Yanping Luo
- Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Fan Ye
- Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Zhong Jie Ding
- State Key Laboratory of Plant Environmental Resilience, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Shao Jian Zheng
- State Key Laboratory of Plant Environmental Resilience, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Shuai Qiao
- International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang 322000, China
| | - Yong Wang
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Jiangtao Guo
- Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China; State Key Laboratory of Plant Environmental Resilience, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China; NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Science and Brain-machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China; Nanhu Brain-computer Interface Institute, Hangzhou, Zhejiang 311100, China.
| | - Wei Yang
- Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China; NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Science and Brain-machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China.
| | - Nannan Su
- International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang 322000, China.
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3
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Pavlovič A, Koller J, Vrobel O, Chamrád I, Lenobel R, Tarkowski P. Is the co-option of jasmonate signalling for botanical carnivory a universal trait for all carnivorous plants? JOURNAL OF EXPERIMENTAL BOTANY 2024; 75:334-349. [PMID: 37708289 PMCID: PMC10735409 DOI: 10.1093/jxb/erad359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 09/13/2023] [Indexed: 09/16/2023]
Abstract
The carnivorous plants in the order Caryophyllales co-opted jasmonate signalling from plant defence to botanical carnivory. However, carnivorous plants have at least 11 independent origins, and here we ask whether jasmonate signalling has been co-opted repeatedly in different evolutionary lineages. We experimentally wounded and fed the carnivorous plants Sarracenia purpurea (order Ericales), Cephalotus follicularis (order Oxalidales), Drosophyllum lusitanicum (order Caryophyllales), and measured electrical signals, phytohormone tissue level, and digestive enzymes activity. Coronatine was added exogenously to confirm the role of jasmonates in the induction of digestive process. Immunodetection of aspartic protease and proteomic analysis of digestive fluid was also performed. We found that prey capture induced accumulation of endogenous jasmonates only in D. lusitanicum, in accordance with increased enzyme activity after insect prey or coronatine application. In C. follicularis, the enzyme activity was constitutive while in S. purpurea was regulated by multiple factors. Several classes of digestive enzymes were identified in the digestive fluid of D. lusitanicum. Although carnivorous plants from different evolutionary lineages use the same digestive enzymes, the mechanism of their regulation differs. All investigated genera use jasmonates for their ancient role, defence, but jasmonate signalling has been co-opted for botanical carnivory only in some of them.
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Affiliation(s)
- Andrej Pavlovič
- Department of Biophysics, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Jana Koller
- Department of Biophysics, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Ondřej Vrobel
- Czech Advanced Technology and Research Institute, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
- Center of the Region Haná for Biotechnological and Agricultural Research, Department of Genetic Resources for Vegetables, Medicinal and Special Plants, Crop Research Institute, Šlechtitelů 29, CZ-783 71 Olomouc, Czech Republic
| | - Ivo Chamrád
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - René Lenobel
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Petr Tarkowski
- Czech Advanced Technology and Research Institute, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
- Center of the Region Haná for Biotechnological and Agricultural Research, Department of Genetic Resources for Vegetables, Medicinal and Special Plants, Crop Research Institute, Šlechtitelů 29, CZ-783 71 Olomouc, Czech Republic
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4
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Wang Y, Jiang X, Li X, Ding K, Liu X, Huang B, Ding J, Qu K, Sun W, Xue Z, Xu W. Bionic ordered structured hydrogels: structure types, design strategies, optimization mechanism of mechanical properties and applications. MATERIALS HORIZONS 2023; 10:4033-4058. [PMID: 37522298 DOI: 10.1039/d3mh00326d] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
Natural organisms, such as lobsters, lotus, and humans, exhibit exceptional mechanical properties due to their ordered structures. However, traditional hydrogels have limitations in their mechanical and physical properties due to their disordered molecular structures when compared with natural organisms. Therefore, inspired by nature and the properties of hydrogels similar to those of biological soft tissues, researchers are increasingly focusing on how to investigate bionic ordered structured hydrogels and render them as bioengineering soft materials with unique mechanical properties. In this paper, we systematically introduce the various structure types, design strategies, and optimization mechanisms used to enhance the strength, toughness, and anti-fatigue properties of bionic ordered structured hydrogels in recent years. We further review the potential applications of bionic ordered structured hydrogels in various fields, including sensors, bioremediation materials, actuators, and impact-resistant materials. Finally, we summarize the challenges and future development prospects of bionic ordered structured hydrogels in preparation and applications.
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Affiliation(s)
- Yanyan Wang
- School of Chemistry and Materials Science Ludong University, Yantai 264025, China.
| | - Xinyu Jiang
- School of Chemistry and Materials Science Ludong University, Yantai 264025, China.
| | - Xusheng Li
- School of Chemistry and Materials Science Ludong University, Yantai 264025, China.
| | - Kexin Ding
- School of Chemistry and Materials Science Ludong University, Yantai 264025, China.
| | - Xianrui Liu
- School of Chemistry and Materials Science Ludong University, Yantai 264025, China.
| | - Bin Huang
- School of Chemistry and Materials Science Ludong University, Yantai 264025, China.
| | - Junjie Ding
- School of Chemistry and Materials Science Ludong University, Yantai 264025, China.
| | - Keyu Qu
- School of Chemistry and Materials Science Ludong University, Yantai 264025, China.
| | - Wenzhi Sun
- School of Chemistry and Materials Science Ludong University, Yantai 264025, China.
| | - Zhongxin Xue
- School of Chemistry and Materials Science Ludong University, Yantai 264025, China.
| | - Wenlong Xu
- School of Chemistry and Materials Science Ludong University, Yantai 264025, China.
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5
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Hedrich R, Kreuzer I. Demystifying the Venus flytrap action potential. THE NEW PHYTOLOGIST 2023; 239:2108-2112. [PMID: 37424515 DOI: 10.1111/nph.19113] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/05/2023] [Indexed: 07/11/2023]
Abstract
All plants are electrically excitable, but only few are known to fire a well-defined, all-or-nothing action potential (AP). The Venus flytrap Dionaea muscipula displays APs with an extraordinarily high firing frequency and speed, enabling the capture organ of this carnivorous plant to catch small animals as fast as flies. The number of APs triggered by the prey is counted and serves as the basis for decisions within the flytrap's hunting cycle. The archetypical Dionaea AP lasts 1 s and consists of five phases: Starting from the resting state, an initial cytosolic Ca2+ transient is followed by depolarization, repolarization and a transient hyperpolarization (overshoot) before the original membrane potential is finally recovered. When the flytrap matures and becomes excitable, a distinct set of ion channels, pumps and carriers is expressed, each mastering a distinct AP phase.
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Affiliation(s)
- Rainer Hedrich
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, D-97082, Würzburg, Germany
| | - Ines Kreuzer
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, D-97082, Würzburg, Germany
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6
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Armada-Moreira A, Dar AM, Zhao Z, Cea C, Gelinas J, Berggren M, Costa A, Khodagholy D, Stavrinidou E. Plant electrophysiology with conformable organic electronics: Deciphering the propagation of Venus flytrap action potentials. SCIENCE ADVANCES 2023; 9:eadh4443. [PMID: 37494449 PMCID: PMC10371018 DOI: 10.1126/sciadv.adh4443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 06/22/2023] [Indexed: 07/28/2023]
Abstract
Electrical signals in plants are mediators of long-distance signaling and correlate with plant movements and responses to stress. These signals are studied with single surface electrodes that cannot resolve signal propagation and integration, thus impeding their decoding and link to function. Here, we developed a conformable multielectrode array based on organic electronics for large-scale and high-resolution plant electrophysiology. We performed precise spatiotemporal mapping of the action potential (AP) in Venus flytrap and found that the AP actively propagates through the tissue with constant speed and without strong directionality. We also found that spontaneously generated APs can originate from unstimulated hairs and that they correlate with trap movement. Last, we demonstrate that the Venus flytrap circuitry can be activated by cells other than the sensory hairs. Our work reveals key properties of the AP and establishes the capacity of organic bioelectronics for resolving electrical signaling in plants contributing to the mechanistic understanding of long-distance responses in plants.
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Affiliation(s)
- Adam Armada-Moreira
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74 Norrköping, Sweden
- Neuronal Dynamics Lab, International School for Advanced Studies, 34136 Trieste TS, Italy
| | - Abdul Manan Dar
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74 Norrköping, Sweden
| | - Zifang Zhao
- Department of Electrical Engineering, Columbia University, New York, NY 10027, USA
| | - Claudia Cea
- Department of Electrical Engineering, Columbia University, New York, NY 10027, USA
| | - Jennifer Gelinas
- Department of Neurology, Columbia University Medical Center, New York, NY 10032, USA
| | - Magnus Berggren
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74 Norrköping, Sweden
- Wallenberg Wood Science Center, Department of Science and Technology, Linköping University, SE-601 74 Norrköping, Sweden
| | - Alex Costa
- Department of Biosciences, University of Milan, 20133 Milano, Italy
- Institute of Biophysics, National Research Council of Italy (CNR), 20133 Milano, Italy
| | - Dion Khodagholy
- Department of Electrical Engineering, Columbia University, New York, NY 10027, USA
| | - Eleni Stavrinidou
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74 Norrköping, Sweden
- Wallenberg Wood Science Center, Department of Science and Technology, Linköping University, SE-601 74 Norrköping, Sweden
- Umeå Plant Science Center, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden
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7
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Kwakernaak LJ, van Hecke M. Counting and Sequential Information Processing in Mechanical Metamaterials. PHYSICAL REVIEW LETTERS 2023; 130:268204. [PMID: 37450791 DOI: 10.1103/physrevlett.130.268204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 05/30/2023] [Indexed: 07/18/2023]
Abstract
Materials with an irreversible response to cyclic driving exhibit an evolving internal state which, in principle, encodes information on the driving history. Here we realize irreversible metamaterials that count mechanical driving cycles and store the result into easily interpretable internal states. We extend these designs to aperiodic metamaterials that are sensitive to the order of different driving magnitudes, and realize "lock and key" metamaterials that only reach a specific state for a given target driving sequence. Our metamaterials are robust, scalable, and extendable, give insight into the transient memories of complex media, and open new routes towards smart sensing, soft robotics, and mechanical information processing.
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Affiliation(s)
- Lennard J Kwakernaak
- Huygens-Kamerlingh Onnes Laboratory, Universiteit Leiden, PO Box 9504, 2300 RA Leiden, Netherlands and AMOLF, Science Park 104, 1098 XG Amsterdam, Netherlands
| | - Martin van Hecke
- Huygens-Kamerlingh Onnes Laboratory, Universiteit Leiden, PO Box 9504, 2300 RA Leiden, Netherlands and AMOLF, Science Park 104, 1098 XG Amsterdam, Netherlands
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8
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Iosip AL, Scherzer S, Bauer S, Becker D, Krischke M, Al-Rasheid KAS, Schultz J, Kreuzer I, Hedrich R. DYSCALCULIA, a Venus flytrap mutant without the ability to count action potentials. Curr Biol 2023; 33:589-596.e5. [PMID: 36693369 DOI: 10.1016/j.cub.2022.12.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 12/01/2022] [Accepted: 12/21/2022] [Indexed: 01/24/2023]
Abstract
The Venus flytrap Dionaea muscipula estimates prey nutrient content by counting trigger hair contacts initiating action potentials (APs) and calcium waves traveling all over the trap.1,2,3 A first AP is associated with a subcritical rise in cytosolic calcium concentration, but when the second AP arrives in time, calcium levels pass the threshold required for fast trap closure. Consequently, memory function and decision-making are timed via a calcium clock.3,4 For higher numbers of APs elicited by the struggling prey, the Ca2+ clock connects to the networks governed by the touch hormone jasmonic acid (JA), which initiates slow, hermetic trap sealing and mining of the animal food stock.5 Two distinct phases of trap closure can be distinguished within Dionaea's hunting cycle: (1) very fast trap snapping requiring two APs and crossing of a critical cytosolic Ca2+ level and (2) JA-dependent slow trap sealing and prey processing induced by more than five APs. The Dionaea mutant DYSC is still able to fire touch-induced APs but does not snap close its traps and fails to enter the hunting cycle after prolonged mechanostimulation. Transcriptomic analyses revealed that upon trigger hair touch/AP stimulation, activation of calcium signaling is largely suppressed in DYSC traps. The observation that external JA application restored hunting cycle progression together with the DYSC phenotype and its transcriptional landscape indicates that DYSC cannot properly read, count, and decode touch/AP-induced calcium signals that are key in prey capture and processing.
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Affiliation(s)
- Anda-Larisa Iosip
- Molecular Plant Physiology and Biophysics, University of Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany; Center for Computational and Theoretical Biology, University of Würzburg, Clara-Oppenheimer-Weg 32, 97074 Würzburg, Germany
| | - Sönke Scherzer
- Molecular Plant Physiology and Biophysics, University of Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany
| | - Sonja Bauer
- Molecular Plant Physiology and Biophysics, University of Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany
| | - Dirk Becker
- Molecular Plant Physiology and Biophysics, University of Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany
| | - Markus Krischke
- Pharmaceutical Biology, Julius-von-Sachs Institute of Biosciences, University of Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany
| | - Khaled A S Al-Rasheid
- Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Jörg Schultz
- Center for Computational and Theoretical Biology, University of Würzburg, Clara-Oppenheimer-Weg 32, 97074 Würzburg, Germany
| | - Ines Kreuzer
- Molecular Plant Physiology and Biophysics, University of Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany.
| | - Rainer Hedrich
- Molecular Plant Physiology and Biophysics, University of Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany.
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9
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Integration of Electrical Signals and Phytohormones in the Control of Systemic Response. Int J Mol Sci 2023; 24:ijms24010847. [PMID: 36614284 PMCID: PMC9821543 DOI: 10.3390/ijms24010847] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/26/2022] [Accepted: 12/28/2022] [Indexed: 01/05/2023] Open
Abstract
Plants are constantly exposed to environmental stresses. Local stimuli sensed by one part of a plant are translated into long-distance signals that can influence the activities in distant tissues. Changes in levels of phytohormones in distant parts of the plant occur in response to various local stimuli. The regulation of hormone levels can be mediated by long-distance electrical signals, which are also induced by local stimulation. We consider the crosstalk between electrical signals and phytohormones and identify interaction points, as well as provide insights into the integration nodes that involve changes in pH, Ca2+ and ROS levels. This review also provides an overview of our current knowledge of how electrical signals and hormones work together to induce a systemic response.
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Graus D, Li K, Rathje JM, Ding M, Krischke M, Müller MJ, Cuin TA, Al-Rasheid KAS, Scherzer S, Marten I, Konrad KR, Hedrich R. Tobacco leaf tissue rapidly detoxifies direct salt loads without activation of calcium and SOS signaling. THE NEW PHYTOLOGIST 2023; 237:217-231. [PMID: 36128659 DOI: 10.1111/nph.18501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 09/11/2022] [Indexed: 06/15/2023]
Abstract
Salt stress is a major abiotic stress, responsible for declining agricultural productivity. Roots are regarded as hubs for salt detoxification, however, leaf salt concentrations may exceed those of roots. How mature leaves manage acute sodium chloride (NaCl) stress is mostly unknown. To analyze the mechanisms for NaCl redistribution in leaves, salt was infiltrated into intact tobacco leaves. It initiated pronounced osmotically-driven leaf movements. Leaf downward movement caused by hydro-passive turgor loss reached a maximum within 2 h. Salt-driven cellular water release was accompanied by a transient change in membrane depolarization but not an increase in cytosolic calcium ion (Ca2+ ) level. Nonetheless, only half an hour later, the leaves had completely regained turgor. This recovery phase was characterized by an increase in mesophyll cell plasma membrane hydrogen ion (H+ ) pumping, a salt uptake-dependent cytosolic alkalization, and a return of the apoplast osmolality to pre-stress levels. Although, transcript numbers of abscisic acid- and Salt Overly Sensitive pathway elements remained unchanged, salt adaptation depended on the vacuolar H+ /Na+ -exchanger NHX1. Altogether, tobacco leaves can detoxify sodium ions (Na+ ) rapidly even under massive salt loads, based on pre-established posttranslational settings and NHX1 cation/H+ antiport activity. Unlike roots, signaling and processing of salt stress in tobacco leaves does not depend on Ca2+ signaling.
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Affiliation(s)
- Dorothea Graus
- Institute for Molecular Plant Physiology and Biophysics, University of Wuerzburg, Julius von-Sachs Platz 2, D-97082, Würzburg, Germany
| | - Kunkun Li
- Institute for Molecular Plant Physiology and Biophysics, University of Wuerzburg, Julius von-Sachs Platz 2, D-97082, Würzburg, Germany
| | - Jan M Rathje
- Institute for Molecular Plant Physiology and Biophysics, University of Wuerzburg, Julius von-Sachs Platz 2, D-97082, Würzburg, Germany
| | - Meiqi Ding
- Institute for Molecular Plant Physiology and Biophysics, University of Wuerzburg, Julius von-Sachs Platz 2, D-97082, Würzburg, Germany
| | - Markus Krischke
- Institute for Pharmaceutical Biology, University of Wuerzburg, Julius von-Sachs Platz 2, D-97082, Würzburg, Germany
| | - Martin J Müller
- Institute for Pharmaceutical Biology, University of Wuerzburg, Julius von-Sachs Platz 2, D-97082, Würzburg, Germany
| | - Tracey Ann Cuin
- Biological Sciences, School of Natural Sciences, University of Tasmania, Hobart, Tas., 7005, Australia
| | - Khaled A S Al-Rasheid
- Zoology Department, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Sönke Scherzer
- Institute for Molecular Plant Physiology and Biophysics, University of Wuerzburg, Julius von-Sachs Platz 2, D-97082, Würzburg, Germany
| | - Irene Marten
- Institute for Molecular Plant Physiology and Biophysics, University of Wuerzburg, Julius von-Sachs Platz 2, D-97082, Würzburg, Germany
| | - Kai R Konrad
- Institute for Molecular Plant Physiology and Biophysics, University of Wuerzburg, Julius von-Sachs Platz 2, D-97082, Würzburg, Germany
| | - Rainer Hedrich
- Institute for Molecular Plant Physiology and Biophysics, University of Wuerzburg, Julius von-Sachs Platz 2, D-97082, Würzburg, Germany
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11
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Ivesic C, Adlassnig W, Koller-Peroutka M, Kress L, Lang I. Snatching Sundews-Analysis of Tentacle Movement in Two Species of Drosera in Terms of Response Rate, Response Time, and Speed of Movement. PLANTS (BASEL, SWITZERLAND) 2022; 11:3212. [PMID: 36501252 PMCID: PMC9740574 DOI: 10.3390/plants11233212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/15/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
Drosera, Droseraceae, catch prey with sticky tentacles. Both Australian Drosera allantostigma and widespread D. rotundifolia show three types of anatomically different tentacles: short, peripheral, and snap-tentacles. The latter two are capable of fast movement. This motion was analysed after mechanical, chemical, and electrical stimulation with respect to response rate, response time, and angular velocity of bending. Compared to D. rotundifolia, D. allantostigma responds more frequently and faster; the tentacles bend with higher angular velocity. Snap-tentacles have a lower response rate, shorter response time, and faster angular velocity. The response rates for chemical and electrical stimuli are similar, and higher than the rates for mechanical stimulus. The response time is not dependent on stimulus type. The higher motility in D. allantostigma indicates increased dependence on mechanical prey capture, and a reduced role of adhesive mucilage. The same tentacle types are present in both species and show similar motility patterns. The lower response rate of snap-tentacles might be a safety measure against accidental triggering, since the motion of snap-tentacles is irreversible and tissue destructive. Furthermore, tentacles seem to discern stimuli and respond specifically. The established model of stereotypical tentacle movement may not fully explain these observations.
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Affiliation(s)
- Caroline Ivesic
- Functional and Evolutionary Ecology, Faculty of Life Sciences, University of Vienna, Djerassiplatz 1, 1030 Vienna, Austria
- Core Facility Cell Imaging and Ultrastructure Research, Faculty of Life Sciences, University of Vienna, Djerassiplatz 1, 1030 Vienna, Austria
| | - Wolfram Adlassnig
- Core Facility Cell Imaging and Ultrastructure Research, Faculty of Life Sciences, University of Vienna, Djerassiplatz 1, 1030 Vienna, Austria
| | - Marianne Koller-Peroutka
- Core Facility Cell Imaging and Ultrastructure Research, Faculty of Life Sciences, University of Vienna, Djerassiplatz 1, 1030 Vienna, Austria
| | - Linda Kress
- Core Facility Cell Imaging and Ultrastructure Research, Faculty of Life Sciences, University of Vienna, Djerassiplatz 1, 1030 Vienna, Austria
| | - Ingeborg Lang
- Functional and Evolutionary Ecology, Faculty of Life Sciences, University of Vienna, Djerassiplatz 1, 1030 Vienna, Austria
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12
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Brownlee C. Plant physiology: Anatomy of a plant action potential. Curr Biol 2022; 32:R1000-R1002. [PMID: 36220083 DOI: 10.1016/j.cub.2022.08.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The Venus flytrap possesses modified leaves that can snap shut fast enough to catch a fly. A new study identifies the major components of the toolkit that allows the flytrap to fire action potentials, illustrating how different ion channels and transporters are recruited to give rise to this unique plant behavioural response.
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Affiliation(s)
- Colin Brownlee
- Marine Biological Association, the Laboratory, Citadel Hill, Plymouth, UK.
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13
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Scherzer S, Böhm J, Huang S, Iosip AL, Kreuzer I, Becker D, Heckmann M, Al-Rasheid KAS, Dreyer I, Hedrich R. A unique inventory of ion transporters poises the Venus flytrap to fast-propagating action potentials and calcium waves. Curr Biol 2022; 32:4255-4263.e5. [PMID: 36087579 DOI: 10.1016/j.cub.2022.08.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 06/20/2022] [Accepted: 08/17/2022] [Indexed: 12/14/2022]
Abstract
Since the 19th century, it has been known that the carnivorous Venus flytrap is electrically excitable. Nevertheless, the mechanism and the molecular entities of the flytrap action potential (AP) remain unknown. When entering the electrically excitable stage, the trap expressed a characteristic inventory of ion transporters, among which the increase in glutamate receptor GLR3.6 RNA was most pronounced. Trigger hair stimulation or glutamate application evoked an AP and a cytoplasmic Ca2+ transient that both propagated at the same speed from the site of induction along the entire trap lobe surface. A priming Ca2+ moiety entering the cytoplasm in the context of the AP was further potentiated by an organelle-localized calcium-induced calcium release (CICR)-like system prolonging the Ca2+ signal. While the Ca2+ transient persisted, SKOR K+ channels and AHA H+-ATPases repolarized the AP already. By counting the number of APs and long-lasting Ca2+ transients, the trap directs the different steps in the carnivorous plant's hunting cycle. VIDEO ABSTRACT.
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Affiliation(s)
- Sönke Scherzer
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Wuerzburg University, Julius-von-Sachs-Platz 2, 97070 Wuerzburg, Germany.
| | - Jennifer Böhm
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Wuerzburg University, Julius-von-Sachs-Platz 2, 97070 Wuerzburg, Germany
| | - Shouguang Huang
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Wuerzburg University, Julius-von-Sachs-Platz 2, 97070 Wuerzburg, Germany
| | - Anda L Iosip
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Wuerzburg University, Julius-von-Sachs-Platz 2, 97070 Wuerzburg, Germany
| | - Ines Kreuzer
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Wuerzburg University, Julius-von-Sachs-Platz 2, 97070 Wuerzburg, Germany
| | - Dirk Becker
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Wuerzburg University, Julius-von-Sachs-Platz 2, 97070 Wuerzburg, Germany
| | - Manfred Heckmann
- Department of Neurophysiology, Institute of Physiology, Wuerzburg University, Röntgenring 9, 97070 Wuerzburg, Germany
| | - Khaled A S Al-Rasheid
- Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ingo Dreyer
- Center of Bioinformatics, Simulation and Modeling (CBSM), Faculty of Engineering, Universidad de Talca, 2 Norte 685, Talca 3460000, Chile
| | - Rainer Hedrich
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Wuerzburg University, Julius-von-Sachs-Platz 2, 97070 Wuerzburg, Germany.
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14
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Schneider HM. Characterization, costs, cues and future perspectives of phenotypic plasticity. ANNALS OF BOTANY 2022; 130:131-148. [PMID: 35771883 PMCID: PMC9445595 DOI: 10.1093/aob/mcac087] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 06/28/2022] [Indexed: 06/09/2023]
Abstract
BACKGROUND Plastic responses of plants to the environment are ubiquitous. Phenotypic plasticity occurs in many forms and at many biological scales, and its adaptive value depends on the specific environment and interactions with other plant traits and organisms. Even though plasticity is the norm rather than the exception, its complex nature has been a challenge in characterizing the expression of plasticity, its adaptive value for fitness and the environmental cues that regulate its expression. SCOPE This review discusses the characterization and costs of plasticity and approaches, considerations, and promising research directions in studying plasticity. Phenotypic plasticity is genetically controlled and heritable; however, little is known about how organisms perceive, interpret and respond to environmental cues, and the genes and pathways associated with plasticity. Not every genotype is plastic for every trait, and plasticity is not infinite, suggesting trade-offs, costs and limits to expression of plasticity. The timing, specificity and duration of plasticity are critical to their adaptive value for plant fitness. CONCLUSIONS There are many research opportunities to advance our understanding of plant phenotypic plasticity. New methodology and technological breakthroughs enable the study of phenotypic responses across biological scales and in multiple environments. Understanding the mechanisms of plasticity and how the expression of specific phenotypes influences fitness in many environmental ranges would benefit many areas of plant science ranging from basic research to applied breeding for crop improvement.
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15
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Durak GM, Speck T, Poppinga S. Shapeshifting in the Venus flytrap ( Dionaea muscipula): Morphological and biomechanical adaptations and the potential costs of a failed hunting cycle. FRONTIERS IN PLANT SCIENCE 2022; 13:970320. [PMID: 36119615 PMCID: PMC9478607 DOI: 10.3389/fpls.2022.970320] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
The evolutionary roots of carnivory in the Venus flytrap (Dionaea muscipula) stem from a defense response to plant injury caused by, e.g., herbivores. Dionaea muscipula aka. Darwin's most wonderful plant underwent extensive modification of leaves into snap-traps specialized for prey capture. Even the tiny seedlings of the Venus flytrap already produce fully functional, millimeter-sized traps. The trap size increases as the plant matures, enabling capture of larger prey. The movement of snap-traps is very fast (~100-300 ms) and is actuated by a combination of changes in the hydrostatic pressure of the leaf tissue with the release of prestress (embedded energy), triggering a snap-through of the trap lobes. This instability phenomenon is facilitated by the double curvature of the trap lobes. In contrast, trap reopening is a slower process dependent on trap size and morphology, heavily reliant on turgor and/or cell growth. Once a prey item is caught, the trap reconfigures its shape, seals itself off and forms a digestive cavity allowing the plant to release an enzymatic cocktail to draw nutrition from its captive. Interestingly, a failed attempt to capture prey can come at a heavy cost: the trap can break during reopening, thus losing its functionality. In this mini-review, we provide a detailed account of morphological adaptations and biomechanical processes involved in the trap movement during D. muscipula hunting cycle, and discuss possible reasons for and consequences of trap breakage. We also provide a brief introduction to the biological aspects underlying plant motion and their evolutionary background.
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Affiliation(s)
- Grażyna M. Durak
- Plant Biomechanics Group, Botanical Garden, Department of Biology, University of Freiburg, Freiburg, Germany
| | - Thomas Speck
- Plant Biomechanics Group, Botanical Garden, Department of Biology, University of Freiburg, Freiburg, Germany
- Cluster of Excellence livMatS @ FIT, Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Freiburg, Germany
| | - Simon Poppinga
- Botanical Garden, Department of Biology, Technical University of Darmstadt, Darmstadt, Germany
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16
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Parise AG, de Toledo GRA, Oliveira TFDC, Souza GM, Castiello U, Gagliano M, Marder M. Do plants pay attention? A possible phenomenological-empirical approach. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2022; 173:11-23. [PMID: 35636584 DOI: 10.1016/j.pbiomolbio.2022.05.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/17/2022] [Accepted: 05/25/2022] [Indexed: 06/15/2023]
Abstract
Attention is the important ability of flexibly controlling limited cognitive resources. It ensures that organisms engage with the activities and stimuli that are relevant to their survival. Despite the cognitive capabilities of plants and their complex behavioural repertoire, the study of attention in plants has been largely neglected. In this article, we advance the hypothesis that plants are endowed with the ability of attaining attentive states. We depart from a transdisciplinary basis of philosophy, psychology, physics and plant ecophysiology to propose a framework that seeks to explain how plant attention might operate and how it could be studied empirically. In particular, the phenomenological approach seems particularly important to explain plant attention theoretically, and plant electrophysiology seems particularly suited to study it empirically. We propose the use of electrophysiological techniques as a viable way for studying it, and we revisit previous work to support our hypothesis. We conclude this essay with some remarks on future directions for the study of plant attention and its implications to botany.
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Affiliation(s)
- André Geremia Parise
- Laboratory of Plant Cognition and Electrophysiology (LACEV), Department of Botany, Institute of Biology, Federal University of Pelotas, Pelotas, RS, Brazil.
| | - Gabriel Ricardo Aguilera de Toledo
- Laboratory of Plant Cognition and Electrophysiology (LACEV), Department of Botany, Institute of Biology, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Thiago Francisco de Carvalho Oliveira
- Laboratory of Plant Cognition and Electrophysiology (LACEV), Department of Botany, Institute of Biology, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Gustavo Maia Souza
- Laboratory of Plant Cognition and Electrophysiology (LACEV), Department of Botany, Institute of Biology, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Umberto Castiello
- Neuroscience of Movement Laboratory (NEMO), Department of General Psychology, University of Padova, Padova, Italy
| | - Monica Gagliano
- Biological Intelligence Laboratory (BI Lab), School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, Australia
| | - Michael Marder
- Ikerbasque: Basque Foundation for Science & Department of Philosophy, University of the Basque Country (UPV/EHU), Spain
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17
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Freund M, Graus D, Fleischmann A, Gilbert KJ, Lin Q, Renner T, Stigloher C, Albert VA, Hedrich R, Fukushima K. The digestive systems of carnivorous plants. PLANT PHYSIOLOGY 2022; 190:44-59. [PMID: 35604105 PMCID: PMC9434158 DOI: 10.1093/plphys/kiac232] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 04/08/2022] [Indexed: 05/19/2023]
Abstract
To survive in the nutrient-poor habitats, carnivorous plants capture small organisms comprising complex substances not suitable for immediate reuse. The traps of carnivorous plants, which are analogous to the digestive systems of animals, are equipped with mechanisms for the breakdown and absorption of nutrients. Such capabilities have been acquired convergently over the past tens of millions of years in multiple angiosperm lineages by modifying plant-specific organs including leaves. The epidermis of carnivorous trap leaves bears groups of specialized cells called glands, which acquire substances from their prey via digestion and absorption. The digestive glands of carnivorous plants secrete mucilage, pitcher fluids, acids, and proteins, including digestive enzymes. The same (or morphologically distinct) glands then absorb the released compounds via various membrane transport proteins or endocytosis. Thus, these glands function in a manner similar to animal cells that are physiologically important in the digestive system, such as the parietal cells of the stomach and intestinal epithelial cells. Yet, carnivorous plants are equipped with strategies that deal with or incorporate plant-specific features, such as cell walls, epidermal cuticles, and phytohormones. In this review, we provide a systematic perspective on the digestive and absorptive capacity of convergently evolved carnivorous plants, with an emphasis on the forms and functions of glands.
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Affiliation(s)
| | | | - Andreas Fleischmann
- Botanische Staatssammlung München and GeoBio-Center LMU, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Kadeem J Gilbert
- Department of Plant Biology & W.K. Kellogg Biological Station, Michigan State University, Hickory Corners, Michigan 49060, USA
| | - Qianshi Lin
- Department of Botany, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Tanya Renner
- Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Christian Stigloher
- Imaging Core Facility of the Biocenter, University of Würzburg, Würzburg, Germany
| | - Victor A Albert
- Department of Biological Sciences, University at Buffalo, Buffalo, New York 14260, USA
| | - Rainer Hedrich
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, Würzburg, Germany
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18
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Khattar J, Calvo P, Vandebroek I, Pandolfi C, Dahdouh-Guebas F. Understanding interdisciplinary perspectives of plant intelligence: Is it a matter of science, language, or subjectivity? JOURNAL OF ETHNOBIOLOGY AND ETHNOMEDICINE 2022; 18:41. [PMID: 35637487 PMCID: PMC9153103 DOI: 10.1186/s13002-022-00539-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 04/04/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Evidence suggests that plants can behave intelligently by exhibiting the ability to learn, make associations between environmental cues, engage in complex decisions about resource acquisition, memorize, and adapt in flexible ways. However, plant intelligence is a disputed concept in the scientific community. Reasons for lack of consensus can be traced back to the history of Western philosophy, interpretation of terminology, and due to plants lacking neurons and a central nervous system. Plant intelligence thus constitutes a novel paradigm in the plant sciences. Therefore, the perspectives of scientists in plant-related disciplines need to be investigated in order to gain insight into the current state and future development of this concept. METHODS This study analyzed opinions of plant intelligence held by scientists from different plant-related disciplines, including ethnobiology and other biological sciences, through an online questionnaire. RESULTS Our findings show that respondents' personal belief systems and the frequency of taking into account other types of knowledge, such as traditional knowledge, in their own field(s) of study, were associated with their opinions of plant intelligence. Meanwhile, respondents' professional expertise, background (discipline), or familiarity with evidence provided on plant intelligence did not affect their opinions. CONCLUSIONS This study emphasizes the influential role of scientists' own subjective beliefs. In response, two approaches could facilitate transdisciplinary understanding among scientists: (1) effective communication designed to foster change in agreement based on presented information; and (2) holding space for an interdisciplinary dialogue where scientists can express their own subjectivities and open new opportunities for collaboration.
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Affiliation(s)
- Jennifer Khattar
- Systems Ecology and Resource Management, Department of Organism Biology, Faculté des Sciences, Université Libre de Bruxelles - ULB, Avenue F.D. Roosevelt 50, CPi 264/1, 1050, Brussels, Belgium.
- Ecology and Biodiversity, Laboratory of Plant Biology and Nature Management, Biology Department, Vrije Universiteit Brussel - VUB, Pleinlaan 2, VUB-APNA-WE, 1050, Brussels, Belgium.
- International Laboratory of Plant Neurobiology (LINV), Department of Plant, Soil and Environmental Science, Università degli Studi di Firenze, Viale delle Idee 30, 50019, Sesto Fiorentino, Tuscany, Italy.
| | - Paco Calvo
- Minimal Intelligence Lab, Department of Philosophy, University of Murcia, 30100, Murcia, Spain
| | - Ina Vandebroek
- Faculty of Science and Technology, Department of Life Sciences and Natural Products Institute, The University of the West Indies, Mona Campus, Kingston, Jamaica
- Institute of Economic Botany, The New York Botanical Garden, 2900 Southern Boulevard, Bronx, NY, 10458, USA
| | - Camilla Pandolfi
- International Laboratory of Plant Neurobiology (LINV), Department of Plant, Soil and Environmental Science, Università degli Studi di Firenze, Viale delle Idee 30, 50019, Sesto Fiorentino, Tuscany, Italy
| | - Farid Dahdouh-Guebas
- Systems Ecology and Resource Management, Department of Organism Biology, Faculté des Sciences, Université Libre de Bruxelles - ULB, Avenue F.D. Roosevelt 50, CPi 264/1, 1050, Brussels, Belgium
- Ecology and Biodiversity, Laboratory of Plant Biology and Nature Management, Biology Department, Vrije Universiteit Brussel - VUB, Pleinlaan 2, VUB-APNA-WE, 1050, Brussels, Belgium
- Interfaculty Institute of Social-Ecological Transitions - iiTSE, Université Libre de Bruxelles - ULB, Brussels, Belgium
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19
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Khan A, Khan V, Pandey K, Sopory SK, Sanan-Mishra N. Thermo-Priming Mediated Cellular Networks for Abiotic Stress Management in Plants. FRONTIERS IN PLANT SCIENCE 2022; 13:866409. [PMID: 35646001 PMCID: PMC9136941 DOI: 10.3389/fpls.2022.866409] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 02/25/2022] [Indexed: 05/05/2023]
Abstract
Plants can adapt to different environmental conditions and can survive even under very harsh conditions. They have developed elaborate networks of receptors and signaling components, which modulate their biochemistry and physiology by regulating the genetic information. Plants also have the abilities to transmit information between their different parts to ensure a holistic response to any adverse environmental challenge. One such phenomenon that has received greater attention in recent years is called stress priming. Any milder exposure to stress is used by plants to prime themselves by modifying various cellular and molecular parameters. These changes seem to stay as memory and prepare the plants to better tolerate subsequent exposure to severe stress. In this review, we have discussed the various ways in which plants can be primed and illustrate the biochemical and molecular changes, including chromatin modification leading to stress memory, with major focus on thermo-priming. Alteration in various hormones and their subsequent role during and after priming under various stress conditions imposed by changing climate conditions are also discussed.
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Affiliation(s)
| | | | | | | | - Neeti Sanan-Mishra
- Plant RNAi Biology Group, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
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20
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Brenya E, Pervin M, Chen ZH, Tissue DT, Johnson S, Braam J, Cazzonelli CI. Mechanical stress acclimation in plants: Linking hormones and somatic memory to thigmomorphogenesis. PLANT, CELL & ENVIRONMENT 2022; 45:989-1010. [PMID: 34984703 DOI: 10.1111/pce.14252] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 12/03/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
A single event of mechanical stimulation is perceived by mechanoreceptors that transduce rapid transient signalling to regulate gene expression. Prolonged mechanical stress for days to weeks culminates in cellular changes that strengthen the plant architecture leading to thigmomorphogenesis. The convergence of multiple signalling pathways regulates mechanically induced tolerance to numerous biotic and abiotic stresses. Emerging evidence showed prolonged mechanical stimulation can modify the baseline level of gene expression in naive tissues, heighten gene expression, and prime disease resistance upon a subsequent pathogen encounter. The phenotypes of thigmomorphogenesis can persist throughout growth without continued stimulation, revealing somatic-stress memory. Epigenetic processes regulate TOUCH gene expression and could program transcriptional memory in differentiating cells to program thigmomorphogenesis. We discuss the early perception, gene regulatory and phytohormone pathways that facilitate thigmomorphogenesis and mechanical stress acclimation in Arabidopsis and other plant species. We provide insights regarding: (1) the regulatory mechanisms induced by single or prolonged events of mechanical stress, (2) how mechanical stress confers transcriptional memory to induce cross-acclimation to future stress, and (3) why thigmomorphogenesis might resemble an epigenetic phenomenon. Deeper knowledge of how prolonged mechanical stimulation programs somatic memory and primes defence acclimation could transform solutions to improve agricultural sustainability in stressful environments.
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Affiliation(s)
- Eric Brenya
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, Knoxville, Tennessee, USA
| | - Mahfuza Pervin
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
| | - Zhong-Hua Chen
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
- School of Science, Western Sydney University, Richmond, New South Wales, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
| | - Scott Johnson
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
| | - Janet Braam
- Department of Biosciences, Rice University, Houston, Texas, USA
| | - Christopher I Cazzonelli
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
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21
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Ether anesthetics prevents touch-induced trigger hair calcium-electrical signals excite the Venus flytrap. Sci Rep 2022; 12:2851. [PMID: 35181728 PMCID: PMC8857258 DOI: 10.1038/s41598-022-06915-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 02/08/2022] [Indexed: 11/08/2022] Open
Abstract
Plants do not have neurons but operate transmembrane ion channels and can get electrical excited by physical and chemical clues. Among them the Venus flytrap is characterized by its peculiar hapto-electric signaling. When insects collide with trigger hairs emerging the trap inner surface, the mechanical stimulus within the mechanosensory organ is translated into a calcium signal and an action potential (AP). Here we asked how the Ca2+ wave and AP is initiated in the trigger hair and how it is feed into systemic trap calcium-electrical networks. When Dionaea muscipula trigger hairs matures and develop hapto-electric excitability the mechanosensitive anion channel DmMSL10/FLYC1 and voltage dependent SKOR type Shaker K+ channel are expressed in the sheering stress sensitive podium. The podium of the trigger hair is interface to the flytrap's prey capture and processing networks. In the excitable state touch stimulation of the trigger hair evokes a rise in the podium Ca2+ first and before the calcium signal together with an action potential travel all over the trap surface. In search for podium ion channels and pumps mediating touch induced Ca2+ transients, we, in mature trigger hairs firing fast Ca2+ signals and APs, found OSCA1.7 and GLR3.6 type Ca2+ channels and ACA2/10 Ca2+ pumps specifically expressed in the podium. Like trigger hair stimulation, glutamate application to the trap directly evoked a propagating Ca2+ and electrical event. Given that anesthetics affect K+ channels and glutamate receptors in the animal system we exposed flytraps to an ether atmosphere. As result propagation of touch and glutamate induced Ca2+ and AP long-distance signaling got suppressed, while the trap completely recovered excitability when ether was replaced by fresh air. In line with ether targeting a calcium channel addressing a Ca2+ activated anion channel the AP amplitude declined before the electrical signal ceased completely. Ether in the mechanosensory organ did neither prevent the touch induction of a calcium signal nor this post stimulus decay. This finding indicates that ether prevents the touch activated, glr3.6 expressing base of the trigger hair to excite the capture organ.
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22
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Płachno BJ, Kapusta M, Stolarczyk P, Świątek P. Arabinogalactan Proteins in the Digestive Glands of Dionaea muscipula J.Ellis Traps. Cells 2022; 11:cells11030586. [PMID: 35159395 PMCID: PMC8833951 DOI: 10.3390/cells11030586] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/28/2022] [Accepted: 02/06/2022] [Indexed: 01/05/2023] Open
Abstract
The arabinogalactan proteins (AGP) play important roles in plant growth and developmental processes. However, to the best of our knowledge, there is no information on the spatial distribution of AGP in the plant organs and tissues of carnivorous plants during their carnivorous cycle. The Dionaea muscipula trap forms an "external stomach" and is equipped with an effective digestive-absorbing system. Because its digestive glands are composed of specialized cells, the hypothesis that their cell walls are also very specialized in terms of their composition (AGP) compared to the cell wall of the trap epidermal and parenchyma cells was tested. Another aim of this study was to determine whether there is a spatio-temporal distribution of the AGP in the digestive glands during the secretory cycle of D. muscipula. Antibodies that act against AGPs, including JIM8, JIM13 and JIM14, were used. The localization of the examined compounds was determined using immunohistochemistry techniques and immunogold labeling. In both the un-fed and fed traps, there was an accumulation of AGP in the cell walls of the gland secretory cells. The epitope, which is recognized by JIM14, was a useful marker of the digestive glands. The secretory cells of the D. muscipula digestive glands are transfer cells and an accumulation of specific AGP was at the site where the cell wall labyrinth occurred. Immunogold labeling confirmed an occurrence of AGP in the cell wall ingrowths. There were differences in the AGP occurrence (labeled with JIM8 and JIM13) in the cell walls of the gland secretory cells between the unfed and fed traps.
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Affiliation(s)
- Bartosz J. Płachno
- Department of Plant Cytology and Embryology, Institute of Botany, Faculty of Biology, Jagiellonian University in Kraków, 9 Gronostajowa St., 30-387 Kraków, Poland
- Correspondence: ; Tel.: +48-12-664-60-39
| | - Małgorzata Kapusta
- Department of Plant Cytology and Embryology, Faculty of Biology, University of Gdańsk, 59 Wita Stwosza St., 80-308 Gdańsk, Poland;
| | - Piotr Stolarczyk
- Department of Botany, Physiology and Plant Protection, Faculty of Biotechnology and Horticulture, University of Agriculture in Kraków, 29 Listopada 54 Ave., 31-425 Kraków, Poland;
| | - Piotr Świątek
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, 9 Bankowa St., 40-007 Katowice, Poland;
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23
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Biological computation: hearts and flytraps. J Biol Phys 2022; 48:55-78. [PMID: 35089468 PMCID: PMC8866585 DOI: 10.1007/s10867-021-09590-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 10/03/2021] [Indexed: 11/10/2022] Open
Abstract
The original computers were people using algorithms to get mathematical results such as rocket trajectories. After the invention of the digital computer, brains have been widely understood through analogies with computers and now artificial neural networks, which have strengths and drawbacks. We define and examine a new kind of computation better adapted to biological systems, called biological computation, a natural adaptation of mechanistic physical computation. Nervous systems are of course biological computers, and we focus on some edge cases of biological computing, hearts and flytraps. The heart has about the computing power of a slug, and much of its computing happens outside of its forty thousand neurons. The flytrap has about the computing power of a lobster ganglion. This account advances fundamental debates in neuroscience by illustrating ways that classical computability theory can miss complexities of biology. By this reframing of computation, we make way for resolving the disconnect between human and machine learning.
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25
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Akhlaghpour H. An RNA-Based Theory of Natural Universal Computation. J Theor Biol 2021; 537:110984. [PMID: 34979104 DOI: 10.1016/j.jtbi.2021.110984] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 09/30/2021] [Accepted: 12/07/2021] [Indexed: 12/15/2022]
Abstract
Life is confronted with computation problems in a variety of domains including animal behavior, single-cell behavior, and embryonic development. Yet we currently do not know of a naturally existing biological system that is capable of universal computation, i.e., Turing-equivalent in scope. Generic finite-dimensional dynamical systems (which encompass most models of neural networks, intracellular signaling cascades, and gene regulatory networks) fall short of universal computation, but are assumed to be capable of explaining cognition and development. I present a class of models that bridge two concepts from distant fields: combinatory logic (or, equivalently, lambda calculus) and RNA molecular biology. A set of basic RNA editing rules can make it possible to compute any computable function with identical algorithmic complexity to that of Turing machines. The models do not assume extraordinarily complex molecular machinery or any processes that radically differ from what we already know to occur in cells. Distinct independent enzymes can mediate each of the rules and RNA molecules solve the problem of parenthesis matching through their secondary structure. In the most plausible of these models all of the editing rules can be implemented with merely cleavage and ligation operations at fixed positions relative to predefined motifs. This demonstrates that universal computation is well within the reach of molecular biology. It is therefore reasonable to assume that life has evolved - or possibly began with - a universal computer that yet remains to be discovered. The variety of seemingly unrelated computational problems across many scales can potentially be solved using the same RNA-based computation system. Experimental validation of this theory may immensely impact our understanding of memory, cognition, development, disease, evolution, and the early stages of life.
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Affiliation(s)
- Hessameddin Akhlaghpour
- Laboratory of Integrative Brain Function, The Rockefeller University, New York, NY, 10065, USA
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Dreyer I. Nutrient cycling is an important mechanism for homeostasis in plant cells. PLANT PHYSIOLOGY 2021; 187:2246-2261. [PMID: 34890457 PMCID: PMC8644529 DOI: 10.1093/plphys/kiab217] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 04/23/2021] [Indexed: 05/02/2023]
Abstract
Homeostasis in living cells refers to the steady state of internal, physical, and chemical conditions. It is sustained by self-regulation of the dynamic cellular system. To gain insight into the homeostatic mechanisms that maintain cytosolic nutrient concentrations in plant cells within a homeostatic range, we performed computational cell biology experiments. We mathematically modeled membrane transporter systems and simulated their dynamics. Detailed analyses of 'what-if' scenarios demonstrated that a single transporter type for a nutrient, irrespective of whether it is a channel or a cotransporter, is not sufficient to calibrate a desired cytosolic concentration. A cell cannot flexibly react to different external conditions. Rather, at least two different transporter types for the same nutrient, which are energized differently, are required. The gain of flexibility in adjusting a cytosolic concentration was accompanied by the establishment of energy-consuming cycles at the membrane, suggesting that these putatively "futile" cycles are not as futile as they appear. Accounting for the complex interplay of transporter networks at the cellular level may help design strategies for increasing nutrient use efficiency of crop plants.
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Affiliation(s)
- Ingo Dreyer
- Center of Bioinformatics, Simulation and Modeling (CBSM), Faculty of Engineering, Universidad de Talca, Talca CL-3460000, Chile
- Author for communication:
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Böhm J, Scherzer S. Signaling and transport processes related to the carnivorous lifestyle of plants living on nutrient-poor soil. PLANT PHYSIOLOGY 2021; 187:2017-2031. [PMID: 35235668 PMCID: PMC8890503 DOI: 10.1093/plphys/kiab297] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 06/04/2021] [Indexed: 05/29/2023]
Abstract
In Eukaryotes, long-distance and rapid signal transmission is required in order to be able to react fast and flexibly to external stimuli. This long-distance signal transmission cannot take place by diffusion of signal molecules from the site of perception to the target tissue, as their speed is insufficient. Therefore, for adequate stimulus transmission, plants as well as animals make use of electrical signal transmission, as this can quickly cover long distances. This update summarises the most important advances in plant electrical signal transduction with a focus on the carnivorous Venus flytrap. It highlights the different types of electrical signals, examines their underlying ion fluxes and summarises the carnivorous processes downstream of the electrical signals.
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Affiliation(s)
- Jennifer Böhm
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, 97082 Würzburg, Germany
| | - Sönke Scherzer
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, 97082 Würzburg, Germany
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Jakšová J, Rác M, Bokor B, Petřík I, Novák O, Reichelt M, Mithöfer A, Pavlovič A. Anaesthetic diethyl ether impairs long-distance electrical and jasmonate signaling in Arabidopsis thaliana. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 169:311-321. [PMID: 34826706 DOI: 10.1016/j.plaphy.2021.11.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/05/2021] [Accepted: 11/11/2021] [Indexed: 06/13/2023]
Abstract
General volatile anaesthetics (GVA) inhibit electrical signal propagation in animal neurons. Although plants do not have neurons, they generate and propagate electrical signals systemically from a local damaged leaf to neighbouring leaves. This systemic electrical signal propagation is mediated by ligand-gated glutamate receptor-like (GLR) channels. Here, we investigated the effect of GVA diethyl ether on the systemic electrical and further downstream responses in Arabidopsis thaliana. We monitored electrical signals, cytoplasmic Ca2+ level ([Ca2+]cyt), ultra-weak photon emission, amino acid contents, phytohormone response as well as gene expression in response to heat wounding during diethyl ether anaesthesia. We found complete suppression of electrical and [Ca2+]cyt signal propagation from damaged leaf to neighbouring systemic leaves upon diethyl ether treatment. Concomitantly, jasmonates (JAs) did not accumulate and expression of JA-responsive genes (AOS, OPR3, JAZ10) was not detected in systemic leaves. However local damaged leaves still showed increased [Ca2+]cyt and accumulated high level of JAs and JA-inducible transcripts. An exogenously added GLR ligand, L-glutamate, was not able to trigger Ca2+ wave in etherized plants indicating that GLRs are targeted by diethyl ether, but not specifically. The fact that GVA inhibit electrical signal propagation not only in animals but also in plants is intriguing. However, the cellular response is completely blocked only in systemic leaves; the local damaged leaf still senses damaging stimuli.
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Affiliation(s)
- Jana Jakšová
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Marek Rác
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Boris Bokor
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B2, SK-842 15, Bratislava, Slovakia; Comenius University Science Park, Comenius University in Bratislava, Ilkovičova 8, SK-841 04, Bratislava, Slovakia
| | - Ivan Petřík
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Ondřej Novák
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Michael Reichelt
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, D-07745, Jena, Germany
| | - Axel Mithöfer
- Research Group Plant Defense Physiology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, D-07745, Jena, Germany
| | - Andrej Pavlovič
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic.
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Electrical Signaling of Plants under Abiotic Stressors: Transmission of Stimulus-Specific Information. Int J Mol Sci 2021; 22:ijms221910715. [PMID: 34639056 PMCID: PMC8509212 DOI: 10.3390/ijms221910715] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 09/20/2021] [Accepted: 09/22/2021] [Indexed: 12/16/2022] Open
Abstract
Plants have developed complex systems of perception and signaling to adapt to changing environmental conditions. Electrical signaling is one of the most promising candidates for the regulatory mechanisms of the systemic functional response under the local action of various stimuli. Long-distance electrical signals of plants, such as action potential (AP), variation potential (VP), and systemic potential (SP), show specificities to types of inducing stimuli. The systemic response induced by a long-distance electrical signal, representing a change in the activity of a complex of molecular-physiological processes, includes a nonspecific component and a stimulus-specific component. This review discusses possible mechanisms for transmitting information about the nature of the stimulus and the formation of a specific systemic response with the participation of electrical signals induced by various abiotic factors.
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Segundo-Ortin M, Calvo P. Consciousness and cognition in plants. WILEY INTERDISCIPLINARY REVIEWS. COGNITIVE SCIENCE 2021; 13:e1578. [PMID: 34558231 DOI: 10.1002/wcs.1578] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 08/26/2021] [Accepted: 08/30/2021] [Indexed: 12/17/2022]
Abstract
Unlike animal behavior, behavior in plants is traditionally assumed to be completely determined either genetically or environmentally. Under this assumption, plants are usually considered to be noncognitive organisms. This view nonetheless clashes with a growing body of empirical research that shows that many sophisticated cognitive capabilities traditionally assumed to be exclusive to animals are exhibited by plants too. Yet, if plants can be considered cognitive, even in a minimal sense, can they also be considered conscious? Some authors defend that the quest for plant consciousness is worth pursuing, under the premise that sentience can play a role in facilitating plant's sophisticated behavior. The goal of this article is not to provide a positive argument for plant cognition and consciousness, but to invite a constructive, empirically informed debate about it. After reviewing the empirical literature concerning plant cognition, we introduce the reader to the emerging field of plant neurobiology. Research on plant electrical and chemical signaling can help shed light into the biological bases for plant sentience. To conclude, we shall present a series of approaches to scientifically investigate plant consciousness. In sum, we invite the reader to consider the idea that if consciousness boils down to some form of biological adaptation, we should not exclude a priori the possibility that plants have evolved their own phenomenal experience of the world. This article is categorized under: Cognitive Biology > Evolutionary Roots of Cognition Philosophy > Consciousness Neuroscience > Cognition.
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Affiliation(s)
- Miguel Segundo-Ortin
- Department of Philosophy and Religious Studies, Faculty of Humanities, Utrecht University, Utrecht, The Netherlands
| | - Paco Calvo
- Minimal Intelligence Laboratory, Universidad de Murcia, Murcia, Spain
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31
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Jakšová J, Adamec L, Petřík I, Novák O, Šebela M, Pavlovič A. Contrasting effect of prey capture on jasmonate accumulation in two genera of aquatic carnivorous plants (Aldrovanda, Utricularia). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 166:459-465. [PMID: 34166972 DOI: 10.1016/j.plaphy.2021.06.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
Terrestrial carnivorous plants of genera Drosera, Dionaea and Nepenthes within the order Caryophyllales employ jasmonates for the induction of digestive processes in their traps. Here, we focused on two aquatic carnivorous plant genera with different trapping mechanism from distinct families and orders: Aldrovanda (Droseraceae, Caryophyllales) with snap-traps and Utricularia (Lentibulariaceae, Lamiales) with suction traps. Using phytohormone analyses and simple biotest, we asked whether the jasmonates are involved in the activation of carnivorous response similar to that known in traps of terrestrial genera of Droseraceae (Drosera, Dionaea). The results showed that Utricularia, in contrast with Aldrovanda, does not use jasmonates for activation of carnivorous response and is the second genus in Lamiales, which has not co-opted jasmonate signalling for botanical carnivory. On the other hand, the nLC-MS/MS analyses revealed that both genera secreted digestive fluid containing cysteine protease homologous to dionain although the mode of its regulation may differ. Whereas in Utricularia the cysteine protease is present constitutively in digestive fluid, it is induced by prey and exogenous application of jasmonic acid in Aldrovanda.
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Affiliation(s)
- Jana Jakšová
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Lubomír Adamec
- Institute of Botany of the Czech Academy of Sciences, Department of Experimental and Functional Morphology, Dukelská135, CZ-379 82, Třeboň, Czech Republic
| | - Ivan Petřík
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Ondřej Novák
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Marek Šebela
- Department of Biochemistry, Faculty of Science, and Centre of the Region Haná for Biotechnological and Agricultural Research, CATRIN, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Andrej Pavlovič
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic.
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32
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Saikia E, Läubli NF, Vogler H, Rüggeberg M, Herrmann HJ, Burgert I, Burri JT, Nelson BJ, Grossniklaus U, Wittel FK. Mechanical factors contributing to the Venus flytrap's rate-dependent response to stimuli. Biomech Model Mechanobiol 2021; 20:2287-2297. [PMID: 34431032 PMCID: PMC8595191 DOI: 10.1007/s10237-021-01507-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 07/16/2021] [Accepted: 08/13/2021] [Indexed: 11/25/2022]
Abstract
The sensory hairs of the Venus flytrap (Dionaea muscipula Ellis) detect mechanical stimuli imparted by their prey and fire bursts of electrical signals called action potentials (APs). APs are elicited when the hairs are sufficiently stimulated and two consecutive APs can trigger closure of the trap. Earlier experiments have identified thresholds for the relevant stimulus parameters, namely the angular displacement \documentclass[12pt]{minimal}
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\begin{document}$$\omega $$\end{document}ω. However, these experiments could not trace the deformation of the trigger hair’s sensory cells, which are known to transduce the mechanical stimulus. To understand the kinematics at the cellular level, we investigate the role of two relevant mechanical phenomena: viscoelasticity and intercellular fluid transport using a multi-scale numerical model of the sensory hair. We hypothesize that the combined influence of these two phenomena and \documentclass[12pt]{minimal}
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\begin{document}$$\omega $$\end{document}ω contribute to the flytrap’s rate-dependent response to stimuli. In this study, we firstly perform sustained deflection tests on the hair to estimate the viscoelastic material properties of the tissue. Thereafter, through simulations of hair deflection tests at different loading rates, we were able to establish a multi-scale kinematic link between \documentclass[12pt]{minimal}
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\begin{document}$$\omega $$\end{document}ω. This suggests that mechanosensitive ion channels, expected to be stretch-activated and localized in the plasma membrane of the sensory cells, could be additionally sensitive to the rate at which stretch is applied.
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Affiliation(s)
- Eashan Saikia
- Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Zurich, 8093, Switzerland.
| | - Nino F Läubli
- Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland.,Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, CB3 0AS, United Kingdom
| | - Hannes Vogler
- Department of Plant and Microbial Biology and Zurich-Basel Plant Science Center, University of Zurich, Zurich, 8008, Switzerland
| | | | - Hans J Herrmann
- Laboratoire de Physique et Mécanique des Milieux Hétérogènes, École Supérieur de Physique et de Chimie Industrielles de la Ville de Paris, 75005, Paris, France
| | - Ingo Burgert
- Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Zurich, 8093, Switzerland.,Swiss Federal Laboratories for Material Science and Technology-EMPA, Cellulose and Wood Materials Laboratory, 8600, Dubendorf, Switzerland
| | - Jan T Burri
- Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Bradley J Nelson
- Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Ueli Grossniklaus
- Department of Plant and Microbial Biology and Zurich-Basel Plant Science Center, University of Zurich, Zurich, 8008, Switzerland
| | - Falk K Wittel
- Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Zurich, 8093, Switzerland
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Adamec L, Matušíková I, Pavlovič A. Recent ecophysiological, biochemical and evolutional insights into plant carnivory. ANNALS OF BOTANY 2021; 128:241-259. [PMID: 34111238 PMCID: PMC8389183 DOI: 10.1093/aob/mcab071] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 06/07/2021] [Indexed: 05/02/2023]
Abstract
BACKGROUND Carnivorous plants are an ecological group of approx. 810 vascular species which capture and digest animal prey, absorb prey-derived nutrients and utilize them to enhance their growth and development. Extant carnivorous plants have evolved in at least ten independent lineages, and their adaptive traits represent an example of structural and functional convergence. Plant carnivory is a result of complex adaptations to mostly nutrient-poor, wet and sunny habitats when the benefits of carnivory exceed the costs. With a boost in interest and extensive research in recent years, many aspects of these adaptations have been clarified (at least partly), but many remain unknown. SCOPE We provide some of the most recent insights into substantial ecophysiological, biochemical and evolutional particulars of plant carnivory from the functional viewpoint. We focus on those processes and traits in carnivorous plants associated with their ecological characterization, mineral nutrition, cost-benefit relationships, functioning of digestive enzymes and regulation of the hunting cycle in traps. We elucidate mechanisms by which uptake of prey-derived nutrients leads to stimulation of photosynthesis and root nutrient uptake. CONCLUSIONS Utilization of prey-derived mineral (mainly N and P) and organic nutrients is highly beneficial for plants and increases the photosynthetic rate in leaves as a prerequisite for faster plant growth. Whole-genome and tandem gene duplications brought gene material for diversification into carnivorous functions and enabled recruitment of defence-related genes. Possible mechanisms for the evolution of digestive enzymes are summarized, and a comprehensive picture on the biochemistry and regulation of prey decomposition and prey-derived nutrient uptake is provided.
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Affiliation(s)
- Lubomír Adamec
- Institute of Botany of the Czech Academy of Sciences, Dukelská 135, CZ-379 01 Třeboň, Czech Republic
| | - Ildikó Matušíková
- University of Ss. Cyril and Methodius, Department of Ecochemistry and Radioecology, J. Herdu 2, SK-917 01 Trnava, Slovak Republic
| | - Andrej Pavlovič
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, šlechtitelů 27, CZ-783 71 Olomouc, Czech Republic
- For correspondence. E-mail
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Huang S, Ding M, Roelfsema MRG, Dreyer I, Scherzer S, Al-Rasheid KAS, Gao S, Nagel G, Hedrich R, Konrad KR. Optogenetic control of the guard cell membrane potential and stomatal movement by the light-gated anion channel GtACR1. SCIENCE ADVANCES 2021; 7:7/28/eabg4619. [PMID: 34244145 PMCID: PMC8270491 DOI: 10.1126/sciadv.abg4619] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 05/26/2021] [Indexed: 05/03/2023]
Abstract
Guard cells control the aperture of plant stomata, which are crucial for global fluxes of CO2 and water. In turn, guard cell anion channels are seen as key players for stomatal closure, but is activation of these channels sufficient to limit plant water loss? To answer this open question, we used an optogenetic approach based on the light-gated anion channelrhodopsin 1 (GtACR1). In tobacco guard cells that express GtACR1, blue- and green-light pulses elicit Cl- and NO3 - currents of -1 to -2 nA. The anion currents depolarize the plasma membrane by 60 to 80 mV, which causes opening of voltage-gated K+ channels and the extrusion of K+ As a result, continuous stimulation with green light leads to loss of guard cell turgor and closure of stomata at conditions that provoke stomatal opening in wild type. GtACR1 optogenetics thus provides unequivocal evidence that opening of anion channels is sufficient to close stomata.
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Affiliation(s)
- Shouguang Huang
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany
| | - Meiqi Ding
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany
| | - M Rob G Roelfsema
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany.
| | - Ingo Dreyer
- Center of Bioinformatics, Simulation and Modeling (CBSM), Faculty of Engineering, Universidad de Talca, 2 Norte 685, 3460000 Talca, Chile
| | - Sönke Scherzer
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany
| | - Khaled A S Al-Rasheid
- Zoology Department, College of Science, King Saud University, 11451 Riyadh, Saudi Arabia
| | - Shiqiang Gao
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany
- Institute of Physiology, Würzburg University, Röntgenring 9, 97070 Würzburg, Germany
| | - Georg Nagel
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany
- Institute of Physiology, Würzburg University, Röntgenring 9, 97070 Würzburg, Germany
| | - Rainer Hedrich
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany.
| | - Kai R Konrad
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany.
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35
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Hedrich R, Fukushima K. On the Origin of Carnivory: Molecular Physiology and Evolution of Plants on an Animal Diet. ANNUAL REVIEW OF PLANT BIOLOGY 2021; 72:133-153. [PMID: 33434053 DOI: 10.1146/annurev-arplant-080620-010429] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Charles Darwin recognized that carnivorous plants thrive in nutrient-poor soil by capturing animals. Although the concept of botanical carnivory has been known for nearly 150 years, its molecular mechanisms and evolutionary origins have not been well understood until recently. In the last decade, technical advances have fueled the genome and transcriptome sequencings of active and passive hunters, leading to a better understanding of the traits associated with the carnivorous syndrome, from trap leaf development and prey digestion to nutrient absorption, exemplified, for example, by the Venus flytrap (Dionaea muscipula), pitcher plant (Cephalotus follicularis), and bladderwort (Utricularia gibba). The repurposing of defense-related genes is an important trend in the evolution of plant carnivory. In this review, using the Venus flytrap as a representative of the carnivorous plants, we summarize the molecular mechanisms underlying their ability to attract, trap, and digest prey and discuss the origins of plant carnivory in relation to their genomic evolution.
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Affiliation(s)
- Rainer Hedrich
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, 97082 Würzburg, Germany; ,
| | - Kenji Fukushima
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, 97082 Würzburg, Germany; ,
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Li JH, Fan LF, Zhao DJ, Zhou Q, Yao JP, Wang ZY, Huang L. Plant electrical signals: A multidisciplinary challenge. JOURNAL OF PLANT PHYSIOLOGY 2021; 261:153418. [PMID: 33887526 DOI: 10.1016/j.jplph.2021.153418] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 04/06/2021] [Accepted: 04/06/2021] [Indexed: 05/15/2023]
Abstract
Plant electrical signals, an early event in the plant-stimulus interaction, rapidly transmit information generated by the stimulus to other organs, and even the whole plant, to promote the corresponding response and trigger a regulatory cascade. In recent years, many promising state-of-the-art technologies applicable to study plant electrophysiology have emerged. Research focused on expression of genes associated with electrical signals has also proliferated. We propose that it is appropriate for plant electrical signals to be considered in the form of a "plant electrophysiological phenotype". This review synthesizes research on plant electrical signals from a novel, interdisciplinary perspective, which is needed to improve the efficient aggregation and use of plant electrical signal data and to expedite interpretation of plant electrical signals.
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Affiliation(s)
- Jin-Hai Li
- College of Information and Electrical Engineering, China Agricultural University, Beijing, 100083, China; Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, Beijing, 100083, China
| | - Li-Feng Fan
- College of Information and Electrical Engineering, China Agricultural University, Beijing, 100083, China; Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, Beijing, 100083, China
| | - Dong-Jie Zhao
- Institute for Future (IFF), Qingdao University, Qingdao, 266071, China
| | - Qiao Zhou
- College of Information and Electrical Engineering, China Agricultural University, Beijing, 100083, China; Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, Beijing, 100083, China
| | - Jie-Peng Yao
- College of Information and Electrical Engineering, China Agricultural University, Beijing, 100083, China; Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, Beijing, 100083, China
| | - Zhong-Yi Wang
- College of Information and Electrical Engineering, China Agricultural University, Beijing, 100083, China; Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, Beijing, 100083, China; Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, Beijing, 100083, China.
| | - Lan Huang
- College of Information and Electrical Engineering, China Agricultural University, Beijing, 100083, China; Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, Beijing, 100083, China.
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Bauer U, Müller UK, Poppinga S. Complexity and diversity of motion amplification and control strategies in motile carnivorous plant traps. Proc Biol Sci 2021; 288:20210771. [PMID: 34036802 PMCID: PMC8150269 DOI: 10.1098/rspb.2021.0771] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Similar to animals, plants have evolved mechanisms for elastic energy storage and release to power and control rapid motion, yet both groups have been largely studied in isolation. This is exacerbated by the lack of consistent terminology and conceptual frameworks describing elastically powered motion in both groups. Iconic examples of fast movements can be found in carnivorous plants, which have become important models to study biomechanics, developmental processes, evolution and ecology. Trapping structures and processes vary considerably between different carnivorous plant groups. Using snap traps, suction traps and springboard-pitfall traps as examples, we illustrate how traps mix and match various mechanisms to power, trigger and actuate motions that contribute to prey capture, retention and digestion. We highlight a fundamental trade-off between energetic investment and movement control and discuss it in a functional-ecological context.
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Affiliation(s)
- Ulrike Bauer
- School of Biological Sciences, University of Bristol, Bristol, UK
| | - Ulrike K Müller
- Department of Biology, California State University Fresno, Fresno, CA, USA
| | - Simon Poppinga
- Plant Biomechanics Group, Botanic Garden, University of Freiburg, Freiburg, Germany.,Cluster of Excellence livMatS @ FIT-Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Freiburg, Germany
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de Vries S, de Vries J. Plant Genome Evolution: Meat Lovers Expanded Gene Families for Carnivory and Dropped the Rest. Curr Biol 2021; 30:R700-R702. [PMID: 32574630 DOI: 10.1016/j.cub.2020.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Every textbook says that land plants are primary producers and, as such, are eaten. A couple of plants, however, refuse to stay within the boundaries of their trophic level - the carnivorous plants. Now, a new genomic study pinpoints the genetic chassis that underpins carnivory in Venus flytrap, waterwheel plant, and sundew.
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Affiliation(s)
- Sophie de Vries
- Institute of Population Genetics, Heinrich-Heine University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany.
| | - Jan de Vries
- University of Göttingen, Institute for Microbiology and Genetics, Department of Applied Bioinformatics, Goldschmidtstr. 1, 37077 Göttingen, Germany; University of Göttingen, Göttingen Center for Molecular Biosciences (GZMB), Justus-von-Liebig-Weg 11, 37077 Göttingen, Germany.
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39
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de Bakker JMT, Belterman CNW, Coronel R. Excitability and propagation of the electrical impulse in Venus flytrap; a comparative electrophysiological study of unipolar electrograms with myocardial tissue. Bioelectrochemistry 2021; 140:107810. [PMID: 33845442 DOI: 10.1016/j.bioelechem.2021.107810] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 03/25/2021] [Accepted: 03/28/2021] [Indexed: 11/25/2022]
Abstract
Mammalian heart cells and cells of leaves of Dionaea muscipula share the ability to generate propagated action potentials, because the excitable cells are electrically coupled. In the heart the propagated action potential causes synchronized contraction of the heart muscle after automatic generation of the impulse in the sinus node. In Dionaea propagation results in closure of the trap after activation of trigger hairs by an insect. The electrical activity can be recorded in the extracellular space as an extracellular electrogram, resulting from transmembrane currents. Although the underlying physiological mechanism that causes the electrogram is similar for heart and Dionaea cells, the contribution of the various ions to the transmembrane current is different. We recorded extracellular electrograms from Dionaea leaves and compared the recorded signals with those known from the heart. The morphology of the electrograms differed considerably. In comparison to activation in mammalian myocardium, electrograms of Dionaea are more temporally and spatially variable. Whereas electrograms in healthy myocardium recorded at some distance from the site of activation reveal a simple biphasic pattern, Dionaea activation showed positive, negative or biphasic deflections. Comparison of patch clamp data from plant cells and cardiomyocytes suggests a role of temperature and ion concentrations in extracellular space for the diversity of morphologies of the Dionaea electrograms.
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Affiliation(s)
- Jacques M T de Bakker
- Heart Center, Department of Experimental Cardiology, Academic Medical Center, Meibergdreef 9, 1105AZ Amsterdam, the Netherlands.
| | - Charly N W Belterman
- Heart Center, Department of Experimental Cardiology, Academic Medical Center, Meibergdreef 9, 1105AZ Amsterdam, the Netherlands
| | - Ruben Coronel
- Heart Center, Department of Experimental Cardiology, Academic Medical Center, Meibergdreef 9, 1105AZ Amsterdam, the Netherlands
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Arai N, Ohno Y, Jumyo S, Hamaji Y, Ohyama T. Organ-specific expression and epigenetic traits of genes encoding digestive enzymes in the lance-leaf sundew (Drosera adelae). JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:1946-1961. [PMID: 33247920 PMCID: PMC7921302 DOI: 10.1093/jxb/eraa560] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 11/25/2020] [Indexed: 05/16/2023]
Abstract
Over the last two decades, extensive studies have been performed at the molecular level to understand the evolution of carnivorous plants. As fruits, the repertoire of protein components in the digestive fluids of several carnivorous plants have gradually become clear. However, the quantitative aspects of these proteins and the expression mechanisms of the genes that encode them are still poorly understood. In this study, using the Australian sundew Drosera adelae, we identified and quantified the digestive fluid proteins. We examined the expression and methylation status of the genes corresponding to major hydrolytic enzymes in various organs; these included thaumatin-like protein, S-like RNase, cysteine protease, class I chitinase, β-1, 3-glucanase, and hevein-like protein. The genes encoding these proteins were exclusively expressed in the glandular tentacles. Furthermore, the promoters of the β-1, 3-glucanase and cysteine protease genes were demethylated only in the glandular tentacles, similar to the previously reported case of the S-like RNase gene da-I. This phenomenon correlated with high expression of the DNA demethylase DEMETER in the glandular tentacles, strongly suggesting that it performs glandular tentacle-specific demethylation of the genes. The current study strengthens and generalizes the relevance of epigenetics to trap organ-specific gene expression in D. adelae. We also suggest similarities between the trap organs of carnivorous plants and the roots of non-carnivorous plants.
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Affiliation(s)
- Naoki Arai
- Major in Integrative Bioscience and Biomedical Engineering, Graduate School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - Yusuke Ohno
- Major in Integrative Bioscience and Biomedical Engineering, Graduate School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - Shinya Jumyo
- Major in Integrative Bioscience and Biomedical Engineering, Graduate School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - Yusuke Hamaji
- Department of Biology, Faculty of Education and Integrated Arts and Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - Takashi Ohyama
- Major in Integrative Bioscience and Biomedical Engineering, Graduate School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo, Japan
- Department of Biology, Faculty of Education and Integrated Arts and Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
- Correspondence:
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Action potentials induce biomagnetic fields in carnivorous Venus flytrap plants. Sci Rep 2021; 11:1438. [PMID: 33446898 PMCID: PMC7809347 DOI: 10.1038/s41598-021-81114-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 12/30/2020] [Indexed: 12/17/2022] Open
Abstract
Upon stimulation, plants elicit electrical signals that can travel within a cellular network analogous to the animal nervous system. It is well-known that in the human brain, voltage changes in certain regions result from concerted electrical activity which, in the form of action potentials (APs), travels within nerve-cell arrays. Electro- and magnetophysiological techniques like electroencephalography, magnetoencephalography, and magnetic resonance imaging are used to record this activity and to diagnose disorders. Here we demonstrate that APs in a multicellular plant system produce measurable magnetic fields. Using atomic optically pumped magnetometers, biomagnetism associated with electrical activity in the carnivorous Venus flytrap, Dionaea muscipula, was recorded. Action potentials were induced by heat stimulation and detected both electrically and magnetically. Furthermore, the thermal properties of ion channels underlying the AP were studied. Beyond proof of principle, our findings pave the way to understanding the molecular basis of biomagnetism in living plants. In the future, magnetometry may be used to study long-distance electrical signaling in a variety of plant species, and to develop noninvasive diagnostics of plant stress and disease.
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Mano H, Hasebe M. Rapid movements in plants. JOURNAL OF PLANT RESEARCH 2021; 134:3-17. [PMID: 33415544 PMCID: PMC7817606 DOI: 10.1007/s10265-020-01243-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/17/2020] [Indexed: 05/21/2023]
Abstract
Plant movements are generally slow, but some plant species have evolved the ability to move very rapidly at speeds comparable to those of animals. Whereas movement in animals relies on the contraction machinery of muscles, many plant movements use turgor pressure as the primary driving force together with secondarily generated elastic forces. The movement of stomata is the best-characterized model system for studying turgor-driven movement, and many gene products responsible for this movement, especially those related to ion transport, have been identified. Similar gene products were recently shown to function in the daily sleep movements of pulvini, the motor organs for macroscopic leaf movements. However, it is difficult to explain the mechanisms behind rapid multicellular movements as a simple extension of the mechanisms used for unicellular or slow movements. For example, water transport through plant tissues imposes a limit on the speed of plant movements, which becomes more severe as the size of the moving part increases. Rapidly moving traps in carnivorous plants overcome this limitation with the aid of the mechanical behaviors of their three-dimensional structures. In addition to a mechanism for rapid deformation, rapid multicellular movements also require a molecular system for rapid cell-cell communication, along with a mechanosensing system that initiates the response. Electrical activities similar to animal action potentials are found in many plant species, representing promising candidates for the rapid cell-cell signaling behind rapid movements, but the molecular entities of these electrical signals remain obscure. Here we review the current understanding of rapid plant movements with the aim of encouraging further biological studies into this fascinating, challenging topic.
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Affiliation(s)
- Hiroaki Mano
- Division of Evolutionary Biology, National Institute for Basic Biology, Nishigonaka 38, Myodaiji, Okazaki, Aichi, 444-8585, Japan.
- School of Life Science, Graduate University for Advanced Studies, Nishigonaka 38, Myodaiji, Okazaki, Aichi, 444-8585, Japan.
- JST, PRESTO, Honcho 4-1-8, Kawaguchi, Saitama, 332-0012, Japan.
| | - Mitsuyasu Hasebe
- Division of Evolutionary Biology, National Institute for Basic Biology, Nishigonaka 38, Myodaiji, Okazaki, Aichi, 444-8585, Japan.
- School of Life Science, Graduate University for Advanced Studies, Nishigonaka 38, Myodaiji, Okazaki, Aichi, 444-8585, Japan.
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Iosip AL, Böhm J, Scherzer S, Al-Rasheid KAS, Dreyer I, Schultz J, Becker D, Kreuzer I, Hedrich R. The Venus flytrap trigger hair-specific potassium channel KDM1 can reestablish the K+ gradient required for hapto-electric signaling. PLoS Biol 2020; 18:e3000964. [PMID: 33296375 PMCID: PMC7725304 DOI: 10.1371/journal.pbio.3000964] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 11/05/2020] [Indexed: 12/18/2022] Open
Abstract
The carnivorous plant Dionaea muscipula harbors multicellular trigger hairs designed to sense mechanical stimuli upon contact with animal prey. At the base of the trigger hair, mechanosensation is transduced into an all-or-nothing action potential (AP) that spreads all over the trap, ultimately leading to trap closure and prey capture. To reveal the molecular basis for the unique functional repertoire of this mechanoresponsive plant structure, we determined the transcriptome of D. muscipula’s trigger hair. Among the genes that were found to be highly specific to the trigger hair, the Shaker-type channel KDM1 was electrophysiologically characterized as a hyperpolarization- and acid-activated K+-selective channel, thus allowing the reuptake of K+ ions into the trigger hair’s sensory cells during the hyperpolarization phase of the AP. During trap development, the increased electrical excitability of the trigger hair is associated with the transcriptional induction of KDM1. Conversely, when KDM1 is blocked by Cs+ in adult traps, the initiation of APs in response to trigger hair deflection is reduced, and trap closure is suppressed. KDM1 thus plays a dominant role in K+ homeostasis in the context of AP and turgor formation underlying the mechanosensation of trigger hair cells and thus D. muscipula’s hapto-electric signaling. Transcriptomic and electrophysiological studies of the carnivorous Venus flytrap reveal that potassium uptake via a trigger hair-specific potassium channel builds the basis for mechanosensation of likely prey and generation of an action potential that triggers closure of the trap.
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Affiliation(s)
- Anda L. Iosip
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, Würzburg, Germany
- Center for Computational and Theoretical Biology, University of Würzburg, Würzburg, Germany
| | - Jennifer Böhm
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, Würzburg, Germany
| | - Sönke Scherzer
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, Würzburg, Germany
| | | | - Ingo Dreyer
- Center of Bioinformatics, Simulation and Modeling (CBSM), Faculty of Engineering, Universidad de Talca, Talca, Chile
| | - Jörg Schultz
- Center for Computational and Theoretical Biology, University of Würzburg, Würzburg, Germany
| | - Dirk Becker
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, Würzburg, Germany
| | - Ines Kreuzer
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, Würzburg, Germany
- * E-mail: (IK); (RH)
| | - Rainer Hedrich
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, Würzburg, Germany
- * E-mail: (IK); (RH)
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Kumar A, Memo M, Mastinu A. Plant behaviour: an evolutionary response to the environment? PLANT BIOLOGY (STUTTGART, GERMANY) 2020; 22:961-970. [PMID: 32557960 DOI: 10.1111/plb.13149] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 06/01/2020] [Indexed: 05/21/2023]
Abstract
Plants are not just passive living beings that exist in nature. They are complex and highly adaptable species that react sensitively to environmental forces/stimuli with movement, morphological changes and through the communication via volatile molecules. In a way, plants mimic some traits of animal and human behaviour; they compete for limited resources by gaining more area for more sunlight and spread their roots underground. Furthermore, in order to survive and thrive, they evolve and 'learn' to control various environmental stress factors in order to increase the yield of flowering, fertilization and germination processes. The concept of associating complex behaviour, such as intelligence, with plants is still a highly debatable topic among researchers worldwide. Recent studies have shown that plants are able to discriminate between positive and negative experiences and 'learn' from them. Some botanists have interpreted these behavioural data as a form of primitive cognitive processes. Others have evaluated these responses as biological automatisms of plants determined by adaptation to the environment and absence of intelligence. This review aims to explore adaptive behavioural aspects of various plant species distributed in different ecosystems by emphasizing their biological complexity and survival instincts.
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Affiliation(s)
- A Kumar
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Karolinska Institutet, Huddinge, Sweden
| | - M Memo
- Division of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - A Mastinu
- Division of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
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A single touch can provide sufficient mechanical stimulation to trigger Venus flytrap closure. PLoS Biol 2020; 18:e3000740. [PMID: 32649659 PMCID: PMC7351144 DOI: 10.1371/journal.pbio.3000740] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 05/26/2020] [Indexed: 02/06/2023] Open
Abstract
The carnivorous Venus flytrap catches prey by an ingenious snapping mechanism. Based on work over nearly 200 years, it has become generally accepted that two touches of the trap’s sensory hairs within 30 s, each one generating an action potential, are required to trigger closure of the trap. We developed an electromechanical model, which, however, suggests that under certain circumstances one touch is sufficient to generate two action potentials. Using a force-sensing microrobotic system, we precisely quantified the sensory-hair deflection parameters necessary to trigger trap closure and correlated them with the elicited action potentials in vivo. Our results confirm the model’s predictions, suggesting that the Venus flytrap may be adapted to a wider range of prey movements than previously assumed. It is generally accepted that two touches of the Venus flytrap’s sensory hairs within 30 seconds are required to trigger closure of the trap. Here, however, quantification of the plant’s sensory hair deflection parameters reveals that one stimulus is sufficient.
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Palfalvi G, Hackl T, Terhoeven N, Shibata TF, Nishiyama T, Ankenbrand M, Becker D, Förster F, Freund M, Iosip A, Kreuzer I, Saul F, Kamida C, Fukushima K, Shigenobu S, Tamada Y, Adamec L, Hoshi Y, Ueda K, Winkelmann T, Fuchs J, Schubert I, Schwacke R, Al-Rasheid K, Schultz J, Hasebe M, Hedrich R. Genomes of the Venus Flytrap and Close Relatives Unveil the Roots of Plant Carnivory. Curr Biol 2020; 30:2312-2320.e5. [PMID: 32413308 PMCID: PMC7308799 DOI: 10.1016/j.cub.2020.04.051] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 04/16/2020] [Accepted: 04/21/2020] [Indexed: 12/20/2022]
Abstract
Most plants grow and develop by taking up nutrients from the soil while continuously under threat from foraging animals. Carnivorous plants have turned the tables by capturing and consuming nutrient-rich animal prey, enabling them to thrive in nutrient-poor soil. To better understand the evolution of botanical carnivory, we compared the draft genome of the Venus flytrap (Dionaea muscipula) with that of its aquatic sister, the waterwheel plant Aldrovanda vesiculosa, and the sundew Drosera spatulata. We identified an early whole-genome duplication in the family as source for carnivory-associated genes. Recruitment of genes to the trap from the root especially was a major mechanism in the evolution of carnivory, supported by family-specific duplications. Still, these genomes belong to the gene poorest land plants sequenced thus far, suggesting reduction of selective pressure on different processes, including non-carnivorous nutrient acquisition. Our results show how non-carnivorous plants evolved into the most skillful green hunters on the planet.
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Affiliation(s)
- Gergo Palfalvi
- National Institute for Basic Biology, Okazaki 444-8585, Japan; Department of Basic Biology, The Graduate School for Advanced Studies, SOKENDAI, Okazaki 444-8585, Japan
| | - Thomas Hackl
- Department for Bioinformatics, Biocenter, University Würzburg, Am Hubland, 97074 Würzburg, Germany; Institute for Molecular Plant Physiology and Biophysics, University Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany
| | - Niklas Terhoeven
- Institute for Molecular Plant Physiology and Biophysics, University Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany; Center for Computational and Theoretical Biology, Faculty for Biology, University Würzburg, Klara-Oppenheimer-Weg 32, Campus Hubland Nord, 97074 Würzburg, Germany
| | | | - Tomoaki Nishiyama
- Advanced Science Research Center, Kanazawa University, Kanazawa 920-0934, Japan
| | - Markus Ankenbrand
- Department for Bioinformatics, Biocenter, University Würzburg, Am Hubland, 97074 Würzburg, Germany; Center for Computational and Theoretical Biology, Faculty for Biology, University Würzburg, Klara-Oppenheimer-Weg 32, Campus Hubland Nord, 97074 Würzburg, Germany
| | - Dirk Becker
- Institute for Molecular Plant Physiology and Biophysics, University Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany
| | - Frank Förster
- Department for Bioinformatics, Biocenter, University Würzburg, Am Hubland, 97074 Würzburg, Germany; Center for Computational and Theoretical Biology, Faculty for Biology, University Würzburg, Klara-Oppenheimer-Weg 32, Campus Hubland Nord, 97074 Würzburg, Germany
| | - Matthias Freund
- Institute for Molecular Plant Physiology and Biophysics, University Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany; Center for Computational and Theoretical Biology, Faculty for Biology, University Würzburg, Klara-Oppenheimer-Weg 32, Campus Hubland Nord, 97074 Würzburg, Germany
| | - Anda Iosip
- Institute for Molecular Plant Physiology and Biophysics, University Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany; Center for Computational and Theoretical Biology, Faculty for Biology, University Würzburg, Klara-Oppenheimer-Weg 32, Campus Hubland Nord, 97074 Würzburg, Germany
| | - Ines Kreuzer
- Institute for Molecular Plant Physiology and Biophysics, University Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany
| | - Franziska Saul
- Institute for Molecular Plant Physiology and Biophysics, University Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany; Center for Computational and Theoretical Biology, Faculty for Biology, University Würzburg, Klara-Oppenheimer-Weg 32, Campus Hubland Nord, 97074 Würzburg, Germany
| | - Chiharu Kamida
- National Institute for Basic Biology, Okazaki 444-8585, Japan; Department of Basic Biology, The Graduate School for Advanced Studies, SOKENDAI, Okazaki 444-8585, Japan
| | - Kenji Fukushima
- National Institute for Basic Biology, Okazaki 444-8585, Japan; Department of Basic Biology, The Graduate School for Advanced Studies, SOKENDAI, Okazaki 444-8585, Japan; Institute for Molecular Plant Physiology and Biophysics, University Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany
| | - Shuji Shigenobu
- National Institute for Basic Biology, Okazaki 444-8585, Japan; Department of Basic Biology, The Graduate School for Advanced Studies, SOKENDAI, Okazaki 444-8585, Japan
| | - Yosuke Tamada
- National Institute for Basic Biology, Okazaki 444-8585, Japan; Department of Basic Biology, The Graduate School for Advanced Studies, SOKENDAI, Okazaki 444-8585, Japan; School of Engineering, Utsunomiya University, Utsunomiya 321-8585, Japan
| | - Lubomir Adamec
- Department of Functional Ecology, Institute of Botany CAS, 379 01 Třeboň, Czech Republic
| | - Yoshikazu Hoshi
- Department of Plant Science, School of Agriculture, Tokai University, Kumamoto 862-8652, Japan
| | - Kunihiko Ueda
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - Traud Winkelmann
- Institute of Horticultural Production Systems, Woody Plant and Propagation Physiology, Leibniz University Hannover, Herrenhäuser Str. 2, 30419 Hannover, Germany
| | - Jörg Fuchs
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | - Ingo Schubert
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | - Rainer Schwacke
- Institute of Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum Jülich, Corrensstraße 3, 06466 Gatersleben, Germany
| | - Khaled Al-Rasheid
- Institute for Molecular Plant Physiology and Biophysics, University Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany; Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Jörg Schultz
- Department for Bioinformatics, Biocenter, University Würzburg, Am Hubland, 97074 Würzburg, Germany; Center for Computational and Theoretical Biology, Faculty for Biology, University Würzburg, Klara-Oppenheimer-Weg 32, Campus Hubland Nord, 97074 Würzburg, Germany.
| | - Mitsuyasu Hasebe
- National Institute for Basic Biology, Okazaki 444-8585, Japan; Department of Basic Biology, The Graduate School for Advanced Studies, SOKENDAI, Okazaki 444-8585, Japan.
| | - Rainer Hedrich
- Institute for Molecular Plant Physiology and Biophysics, University Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany.
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Kocáb O, Jakšová J, Novák O, Petřík I, Lenobel R, Chamrád I, Pavlovič A. Jasmonate-independent regulation of digestive enzyme activity in the carnivorous butterwort Pinguicula × Tina. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:3749-3758. [PMID: 32219314 PMCID: PMC7307851 DOI: 10.1093/jxb/eraa159] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 03/25/2020] [Indexed: 05/18/2023]
Abstract
Carnivorous plants within the order Caryophyllales use jasmonates, a class of phytohormone, in the regulation of digestive enzyme activities. We used the carnivorous butterwort Pinguicula × Tina from the order Lamiales to investigate whether jasmonate signaling is a universal and ubiquitous signaling pathway that exists outside the order Caryophyllales. We measured the electrical signals, enzyme activities, and phytohormone tissue levels in response to prey capture. Mass spectrometry was used to identify proteins in the digestive secretion. We identified eight enzymes in the digestive secretion, many of which were previously found in other genera of carnivorous plants. Among them, alpha-amylase is unique in carnivorous plants. Enzymatic activities increased in response to prey capture; however, the tissue content of jasmonic acid and its isoleucine conjugate remained rather low in contrast to the jasmonate response to wounding. Enzyme activities did not increase in response to the exogenous application of jasmonic acid or coronatine. Whereas similar digestive enzymes were co-opted from plant defense mechanisms among carnivorous plants, the mode of their regulation differs. The butterwort has not co-opted jasmonate signaling for the induction of enzyme activities in response to prey capture. Moreover, the presence of alpha-amylase in digestive fluid of P. × Tina, which has not been found in other genera of carnivorous plants, might indicate that non-defense-related genes have also been co-opted for carnivory.
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Affiliation(s)
- Ondřej Kocáb
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, Olomouc, Czech Republic
| | - Jana Jakšová
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, Olomouc, Czech Republic
| | - Ondřej Novák
- Laboratory of Growth Regulators, Institute of Experimental Botany, The Czech Academy of Sciences and Faculty of Science, Palacký University, Šlechtitelů 27, Olomouc , Czech Republic
| | - Ivan Petřík
- Laboratory of Growth Regulators, Institute of Experimental Botany, The Czech Academy of Sciences and Faculty of Science, Palacký University, Šlechtitelů 27, Olomouc , Czech Republic
| | - René Lenobel
- Department of Protein Biochemistry and Proteomics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, Olomouc, Czech Republic
| | - Ivo Chamrád
- Department of Protein Biochemistry and Proteomics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, Olomouc, Czech Republic
| | - Andrej Pavlovič
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, Olomouc, Czech Republic
- Correspondence:
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Metabolomics Analysis Reveals Tissue-Specific Metabolite Compositions in Leaf Blade and Traps of Carnivorous Nepenthes Plants. Int J Mol Sci 2020; 21:ijms21124376. [PMID: 32575527 PMCID: PMC7352528 DOI: 10.3390/ijms21124376] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/16/2020] [Accepted: 06/17/2020] [Indexed: 01/27/2023] Open
Abstract
Nepenthes is a genus of carnivorous plants that evolved a pitfall trap, the pitcher, to catch and digest insect prey to obtain additional nutrients. Each pitcher is part of the whole leaf, together with a leaf blade. These two completely different parts of the same organ were studied separately in a non-targeted metabolomics approach in Nepenthes x ventrata, a robust natural hybrid. The first aim was the analysis and profiling of small (50–1000 m/z) polar and non-polar molecules to find a characteristic metabolite pattern for the particular tissues. Second, the impact of insect feeding on the metabolome of the pitcher and leaf blade was studied. Using UPLC-ESI-qTOF and cheminformatics, about 2000 features (MS/MS events) were detected in the two tissues. They showed a huge chemical diversity, harboring classes of chemical substances that significantly discriminate these tissues. Among the common constituents of N. x ventrata are phenolics, flavonoids and naphthoquinones, namely plumbagin, a characteristic compound for carnivorous Nepenthales, and many yet-unknown compounds. Upon insect feeding, only in pitchers in the polar compounds fraction, small but significant differences could be detected. By further integrating information with cheminformatics approaches, we provide and discuss evidence that the metabolite composition of the tissues can point to their function.
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Pavlovič A, Libiaková M, Bokor B, Jakšová J, Petřík I, Novák O, Baluška F. Anaesthesia with diethyl ether impairs jasmonate signalling in the carnivorous plant Venus flytrap (Dionaea muscipula). ANNALS OF BOTANY 2020; 125:173-183. [PMID: 31677265 PMCID: PMC6948209 DOI: 10.1093/aob/mcz177] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 08/06/2019] [Accepted: 10/25/2019] [Indexed: 05/18/2023]
Abstract
BACKGROUND AND AIMS General 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). METHODS We 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 RESULTS Diethyl 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. CONCLUSIONS The 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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Affiliation(s)
- Andrej Pavlovič
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů, Olomouc, Czech Republic
| | - Michaela Libiaková
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina, Bratislava, Slovakia
| | - Boris Bokor
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina, Bratislava, Slovakia
- Comenius University Science Park, Comenius University in Bratislava, Ilkovičova, Bratislava, Slovakia
| | - Jana Jakšová
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů, Olomouc, Czech Republic
| | - Ivan Petřík
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů, Olomouc, Czech Republic
| | - Ondřej Novák
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů, Olomouc, Czech Republic
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Jakšová J, Libiaková M, Bokor B, Petřík I, Novák O, Pavlovič A. Taste for protein: Chemical signal from prey stimulates enzyme secretion through jasmonate signalling in the carnivorous plant Venus flytrap. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 146:90-97. [PMID: 31734521 DOI: 10.1016/j.plaphy.2019.11.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 11/07/2019] [Accepted: 11/07/2019] [Indexed: 06/10/2023]
Abstract
Hunting cycle of the carnivorous plant Venus flytrap (Dionaea muscipula Ellis) is comprised of mechanism for rapid trap closure followed by slow hermetical sealing and activation of gene expression responsible for digestion of prey and nutrient uptake. In the present study, we focus on the late phase of Venus's flytrap hunting cycle when mechanical stimulation of the prey ceases and is replaced by chemical cues. We used two nitrogen-rich compounds (chitin and protein) in addition to mechanostimulation to investigate the electrical and jasmonate signalling responsible for induction of enzyme activities. Chemical stimulation by BSA protein and chitin did not induce any additional spontaneous action potentials (APs). However, chemical stimulation by protein induced the highest levels of jasmonic acid (JA) and its isoleucine conjugate (JA-Ile) as well as the expression of studied gene encoding a cysteine protease (dionain). Although chitin is probably the first chemical agent which is in direct contact with digestive glands, presence of protein in the secured trap mimics the presence of insect prey best.
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Affiliation(s)
- Jana Jakšová
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Michaela Libiaková
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B2, SK-842 15, Bratislava, Slovakia
| | - Boris Bokor
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B2, SK-842 15, Bratislava, Slovakia; Comenius University Science Park, Comenius University in Bratislava, Ilkovičova 8, SK-841 04, Bratislava, Slovakia
| | - Ivan Petřík
- Laboratory of Growth Regulators, Faculty of Science, Palacký University & Institute of Experimental Botany, The Czech Academy of Sciences, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic
| | - Ondřej Novák
- Laboratory of Growth Regulators, Faculty of Science, Palacký University & Institute of Experimental Botany, The Czech Academy of Sciences, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic
| | - Andrej Pavlovič
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic.
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