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Tanarsuwongkul S, Fisher KW, Mullis BT, Negi H, Roberts J, Tomlin F, Wang Q, Stratmann JW. Green leaf volatiles co-opt proteins involved in molecular pattern signalling in plant cells. PLANT, CELL & ENVIRONMENT 2024; 47:928-946. [PMID: 38164082 DOI: 10.1111/pce.14795] [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: 07/18/2023] [Revised: 11/27/2023] [Accepted: 12/13/2023] [Indexed: 01/03/2024]
Abstract
The green leaf volatiles (GLVs) Z-3-hexen-1-ol (Z3-HOL) and Z-3-hexenyl acetate (Z3-HAC) are airborne infochemicals released from damaged plant tissues that induce defenses and developmental responses in receiver plants, but little is known about their mechanism of action. We found that Z3-HOL and Z3-HAC induce similar but distinctive physiological and signaling responses in tomato seedlings and cell cultures. In seedlings, Z3-HAC showed a stronger root growth inhibition effect than Z3-HOL. In cell cultures, the two GLVs induced distinct changes in MAP kinase (MAPK) activity and proton fluxes as well as rapid and massive changes in the phosphorylation status of proteins within 5 min. Many of these phosphoproteins are involved in reprogramming the proteome from cellular homoeostasis to stress and include pattern recognition receptors, a receptor-like cytoplasmic kinase, MAPK cascade components, calcium signaling proteins and transcriptional regulators. These are well-known components of damage-associated molecular pattern (DAMP) signaling pathways. These rapid changes in the phosphoproteome may underly the activation of defense and developmental responses to GLVs. Our data provide further evidence that GLVs function like DAMPs and indicate that GLVs coopt DAMP signaling pathways.
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Affiliation(s)
| | - Kirsten W Fisher
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina, USA
| | - B Todd Mullis
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, USA
- IMCS, Irmo, South Carolina, USA
| | - Harshita Negi
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina, USA
| | - Jamie Roberts
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina, USA
| | - Fallon Tomlin
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina, USA
| | - Qiang Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, USA
| | - Johannes W Stratmann
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina, USA
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2
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Castaldi V, Langella E, Buonanno M, Di Lelio I, Aprile AM, Molisso D, Criscuolo MC, D'Andrea LD, Romanelli A, Amoresano A, Pinto G, Illiano A, Chiaiese P, Becchimanzi A, Pennacchio F, Rao R, Monti SM. Intrinsically disordered Prosystemin discloses biologically active repeat motifs. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 340:111969. [PMID: 38159610 DOI: 10.1016/j.plantsci.2023.111969] [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: 10/18/2023] [Revised: 12/22/2023] [Accepted: 12/26/2023] [Indexed: 01/03/2024]
Abstract
The in-depth studies over the years on the defence barriers by tomato plants have shown that the Systemin peptide controls the response to a wealth of environmental stress agents. This multifaceted stress reaction seems to be related to the intrinsic disorder of its precursor protein, Prosystemin (ProSys). Since latest findings show that ProSys has biological functions besides Systemin sequence, here we wanted to assess if this precursor includes peptide motifs able to trigger stress-related pathways. Candidate peptides were identified in silico and synthesized to test their capacity to trigger defence responses in tomato plants against different biotic stressors. Our results demonstrated that ProSys harbours several repeat motifs which triggered plant immune reactions against pathogens and pest insects. Three of these peptides were detected by mass spectrometry in plants expressing ProSys, demonstrating their effective presence in vivo. These experimental data shed light on unrecognized functions of ProSys, mediated by multiple biologically active sequences which may partly account for the capacity of ProSys to induce defense responses to different stress agents.
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Affiliation(s)
- Valeria Castaldi
- Department of Agricultural Sciences, University of Naples Federico II, via Università 100, Portici, Naples 80055, Italy
| | - Emma Langella
- Institute of Biostructures and Bioimaging, National Research Council (IBB, CNR), via Pietro Castellino 111, Naples 80131, Italy.
| | - Martina Buonanno
- Institute of Biostructures and Bioimaging, National Research Council (IBB, CNR), via Pietro Castellino 111, Naples 80131, Italy
| | - Ilaria Di Lelio
- Department of Agricultural Sciences, University of Naples Federico II, via Università 100, Portici, Naples 80055, Italy; Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, via Università 100, Portici, 80055 Naples, Italy
| | - Anna Maria Aprile
- Department of Agricultural Sciences, University of Naples Federico II, via Università 100, Portici, Naples 80055, Italy
| | - Donata Molisso
- Department of Agricultural Sciences, University of Naples Federico II, via Università 100, Portici, Naples 80055, Italy
| | - Martina Chiara Criscuolo
- Department of Agricultural Sciences, University of Naples Federico II, via Università 100, Portici, Naples 80055, Italy
| | - Luca Domenico D'Andrea
- Istituto di Scienze e Tecnologie Chimiche "Giulio Natta" (SCITEC), Consiglio Nazionale delle Ricerche (CNR), via Alfonso Corti 12, 20131 Milano, Italy
| | | | - Angela Amoresano
- Department of Chemical Sciences, University of Naples Federico II, via Cynthia 8, Napoli and Interuniversitary Consortium "Istituto Nazionale Biostrutture e Biosistemi, 80126 Roma, Italy
| | - Gabriella Pinto
- Department of Chemical Sciences, University of Naples Federico II, via Cynthia 8, Napoli and Interuniversitary Consortium "Istituto Nazionale Biostrutture e Biosistemi, 80126 Roma, Italy
| | - Anna Illiano
- Department of Chemical Sciences, University of Naples Federico II, via Cynthia 8, Napoli and Interuniversitary Consortium "Istituto Nazionale Biostrutture e Biosistemi, 80126 Roma, Italy
| | - Pasquale Chiaiese
- Department of Agricultural Sciences, University of Naples Federico II, via Università 100, Portici, Naples 80055, Italy
| | - Andrea Becchimanzi
- Department of Agricultural Sciences, University of Naples Federico II, via Università 100, Portici, Naples 80055, Italy; Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, via Università 100, Portici, 80055 Naples, Italy
| | - Francesco Pennacchio
- Department of Agricultural Sciences, University of Naples Federico II, via Università 100, Portici, Naples 80055, Italy; Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, via Università 100, Portici, 80055 Naples, Italy
| | - Rosa Rao
- Department of Agricultural Sciences, University of Naples Federico II, via Università 100, Portici, Naples 80055, Italy; Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, via Università 100, Portici, 80055 Naples, Italy.
| | - Simona Maria Monti
- Institute of Biostructures and Bioimaging, National Research Council (IBB, CNR), via Pietro Castellino 111, Naples 80131, Italy.
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3
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Harris FM, Mou Z. Damage-Associated Molecular Patterns and Systemic Signaling. PHYTOPATHOLOGY 2024; 114:308-327. [PMID: 37665354 DOI: 10.1094/phyto-03-23-0104-rvw] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Cellular damage inflicted by wounding, pathogen infection, and herbivory releases a variety of host-derived metabolites, degraded structural components, and peptides into the extracellular space that act as alarm signals when perceived by adjacent cells. These so-called damage-associated molecular patterns (DAMPs) function through plasma membrane localized pattern recognition receptors to regulate wound and immune responses. In plants, DAMPs act as elicitors themselves, often inducing immune outputs such as calcium influx, reactive oxygen species generation, defense gene expression, and phytohormone signaling. Consequently, DAMP perception results in a priming effect that enhances resistance against subsequent pathogen infections. Alongside their established function in local tissues, recent evidence supports a critical role of DAMP signaling in generation and/or amplification of mobile signals that induce systemic immune priming. Here, we summarize the identity, signaling, and synergy of proposed and established plant DAMPs, with a focus on those with published roles in systemic signaling.
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Affiliation(s)
- Fiona M Harris
- Department of Microbiology and Cell Science, University of Florida, P.O. Box 110700, Gainesville, FL 32611
| | - Zhonglin Mou
- Department of Microbiology and Cell Science, University of Florida, P.O. Box 110700, Gainesville, FL 32611
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4
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Stringari G, Villanueva J, Appolloni E, Orsini F, Villalba G, Gabarrell Durany X. Measuring BVOC emissions released by tomato plants grown in a soilless integrated rooftop greenhouse. Heliyon 2024; 10:e23854. [PMID: 38205327 PMCID: PMC10777013 DOI: 10.1016/j.heliyon.2023.e23854] [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: 07/31/2023] [Revised: 12/01/2023] [Accepted: 12/14/2023] [Indexed: 01/12/2024] Open
Abstract
Urban design is currently promoting the inclusion of plants in buildings. However, plants emit biogenic volatile organic compounds (BVOCs), which alone or in combination with other airborne molecules such as CO2, may result in a general increase in tropospheric pollution. Many studies have documented the effects of biotic and abiotic factors on plant BVOC responses, but few have assessed the contribution of typical CO2 levels found in indoor work and meeting spaces. To answer this question, we monitored CO2 and constitutive (MT-limonene) and induced (LOX-cis-3-hexenal) BVOC emissions of a fully developed tomato crop grown hydroponically inside an integrated rooftop greenhouse (i-RTG) in a Mediterranean climate. Two distinctive CO2 assays were performed at the level of the i-RTG by supplying or not CO2. The impact of CO2 on plant physiological emittance was then assessed, and the resulting BVOC rates were compared with reference to EU-LCI values. MT-limonene was ubiquitous among the assays and the most abundant, while LOX-cis-3-hexenal was detected only under controlled CO2 management. The highest levels detected were below the indicated LCIs and were approximately tenfold lower than the corresponding LCI for MT-limonene (50.88 vs. 5000 μg m-3) and eightfold (6.63 μg m-3) higher than the constitutive emission level for LOX-cis-3-hexenal. Over extended sampling (10 min) findings revealed a general emission decrease and significantly different CO2 concentration between the assays. Despite similar decreasing rates of predicted net photosynthesis (Pn) and stomatal conductance (gs) their correlation with decreasing CO2 under uncontrolled condition indirectly suggested a negative CO2 impact on plant emission activity. Conversely, increasing CO2 under the controlled assay showed a positive correlation with induced emissions but not with constitutive ones. Because of significantly higher levels of relative humidity registered under the uncontrolled condition, this factor was considered to affect more than CO2 the emission response and even its collection. This hypothesis was supported by literature findings and attributed to a common issue related with the sampling in static enclosure. Hence, we suggested a careful monitoring of the sampling conditions or further improvements to avoid bias and underestimation of actual emissions. Based on the main outcomes, we observed no evidence of a hazardous effect of registered CO2 rates on the BVOC emissions of tomato plant. Furthermore, because of the low BVOC levels measured in the i-RTG, we assumed as safe the recirculation of this air along building's indoor environments.
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Affiliation(s)
- Gaia Stringari
- Institut de Ciència i Tecnologia Ambientals ICTA-UAB (CEX2019-0940-M), Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Joan Villanueva
- Institut de Ciència i Tecnologia Ambientals ICTA-UAB (CEX2019-0940-M), Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Elisa Appolloni
- Department of Agricultural and Food Sciences, University of Bologna Alma Mater Studiorum, Bologna, Italy
| | - Francesco Orsini
- Department of Agricultural and Food Sciences, University of Bologna Alma Mater Studiorum, Bologna, Italy
| | - Gara Villalba
- Institut de Ciència i Tecnologia Ambientals ICTA-UAB (CEX2019-0940-M), Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
- Department of Chemical, Biological and Environmental Engineering, Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Xavier Gabarrell Durany
- Institut de Ciència i Tecnologia Ambientals ICTA-UAB (CEX2019-0940-M), Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
- Department of Chemical, Biological and Environmental Engineering, Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
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Jia H, Zhang GX, Wu YF, Dai WW, Xu QB, Gan S, Ju XY, Feng ZZ, Li RP, Yuan B. Evaluation of negative effect of Naphthenic acids (NAs) on physiological metabolism and polycyclic aromatic hydrocarbons adsorption of Phragmites australis. CHEMOSPHERE 2023; 318:137909. [PMID: 36681195 DOI: 10.1016/j.chemosphere.2023.137909] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 01/01/2023] [Accepted: 01/17/2023] [Indexed: 06/17/2023]
Abstract
Toxic substances in the environment disturb the adsorption of pollutants in plants but little is known about the underlying mechanisms of these processes. This study evaluated the PAH adsorption by Phragmites australis under NAs stress. Results showed that Naphthenic acids (NAs) significantly decreased the adsorption of PAHs and had higher selectivity for type and structure. P. australis root cell growth and mitosis were significantly affected by NAs, which was accompanied by serious disturbances in mitochondrial function. The physiological evaluation showed the NAs could increase Reactive Oxygen Species (ROS) accumulation by around 16-fold and cause damage to the root cell normal redox equilibrium. The levels of three key related antioxidants, PLA, CAT and POD, decreased significantly to 35-50% under NAs stress and were dependent upon NAs concentration. Furthermore, NAs could significantly change the concentration and species of root exudates of P. ausralis. Autotoxic substances, including alcohol and amines, increased by 28.63% and 23.96, respectively. Sixteen compounds were identified and assumed as potential biomarkers. Galactonic, glyceric, and octadecanoic acid had the general effect of activating PAH in soil. The global view of the metabolic pathway suggests that NAs influenced the citric acid cycle, fatty acid synthesis, amino acid metabolism and the phenylpropanoid pathway. Detection data results indicated that the energy products cause hypoxia and oxidative stress, which are the main processes under the NAs. Furthermore, verification of these processes was fulfilled through gene expression and biomarkers quantification. Our results provide novel metabolic insights into the mechanisms of PAHs adsorption by P. australis under NAs disturbance, suggesting that monitoring NAs in phytoremediation applications is necessary.
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Affiliation(s)
- Hui Jia
- School of Life Science, Jiangsu Normal University, Xuzhou, 221116, PR China; Institute of Environment and Ecology, Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Guang-Xi Zhang
- School of Life Science, Jiangsu Normal University, Xuzhou, 221116, PR China
| | - Yi-Fan Wu
- School of Life Science, Jiangsu Normal University, Xuzhou, 221116, PR China
| | - Wei-Wei Dai
- School of Life Science, Jiangsu Normal University, Xuzhou, 221116, PR China
| | - Quan-Bin Xu
- School of Life Science, Jiangsu Normal University, Xuzhou, 221116, PR China
| | - Shu Gan
- School of Life Science, Jiangsu Normal University, Xuzhou, 221116, PR China
| | - Xiu-Yun Ju
- School of Life Science, Jiangsu Normal University, Xuzhou, 221116, PR China
| | - Zhao-Zhong Feng
- School of Life Science, Jiangsu Normal University, Xuzhou, 221116, PR China.
| | - Rong-Peng Li
- School of Life Science, Jiangsu Normal University, Xuzhou, 221116, PR China.
| | - Bo Yuan
- School of Life Science, Jiangsu Normal University, Xuzhou, 221116, PR China.
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6
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Genomics, Proteomics, and Metabolomics Approaches to Improve Abiotic Stress Tolerance in Tomato Plant. Int J Mol Sci 2023; 24:ijms24033025. [PMID: 36769343 PMCID: PMC9918255 DOI: 10.3390/ijms24033025] [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: 01/09/2023] [Revised: 01/30/2023] [Accepted: 02/01/2023] [Indexed: 02/09/2023] Open
Abstract
To explore changes in proteins and metabolites under stress circumstances, genomics, proteomics, and metabolomics methods are used. In-depth research over the previous ten years has gradually revealed the fundamental processes of plants' responses to environmental stress. Abiotic stresses, which include temperature extremes, water scarcity, and metal toxicity brought on by human activity and urbanization, are a major cause for concern, since they can result in unsustainable warming trends and drastically lower crop yields. Furthermore, there is an emerging reliance on agrochemicals. Stress is responsible for physiological transformations such as the formation of reactive oxygen, stomatal opening and closure, cytosolic calcium ion concentrations, metabolite profiles and their dynamic changes, expression of stress-responsive genes, activation of potassium channels, etc. Research regarding abiotic stresses is lacking because defense feedbacks to abiotic factors necessitate regulating the changes that activate multiple genes and pathways that are not properly explored. It is clear from the involvement of these genes that plant stress response and adaptation are complicated processes. Targeting the multigenicity of plant abiotic stress responses caused by genomic sequences, transcripts, protein organization and interactions, stress-specific and cellular transcriptome collections, and mutant screens can be the first step in an integrative approach. Therefore, in this review, we focused on the genomes, proteomics, and metabolomics of tomatoes under abiotic stress.
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7
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Watts S, Kaur S, Kariyat R. Revisiting plant defense-fitness trade-off hypotheses using Solanum as a model genus. Front Ecol Evol 2023. [DOI: 10.3389/fevo.2022.1094961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Plants possess physical and chemical defenses which have been found to deter herbivores that feed and oviposit on them. Despite having wide variety of defenses which can be constitutive or induced, plants are attacked and damaged by insects associated with different mouthparts and feeding habits. Since these defenses are costly, trade-offs for growth and defense traits play an important role in warding off the herbivores, with consequences for plant and herbivore growth, development and fitness. Solanum is a diverse and rich genus comprising of over 1,500 species with economic and ecological importance. Although a large number of studies on Solanum species with different herbivores have been carried out to understand plant defenses and herbivore counter defenses, they have primarily focused on pairwise interactions, and a few species of economic and ecological importance. Therefore, a detailed and updated understanding of the integrated defense system (sum of total defenses and trade-offs) is still lacking. Through this review, we take a closer look at the most common plant defense hypotheses, their assumptions and trade-offs and also a comprehensive evaluation of studies that use the genus Solanum as their host plant, and their generalist and specialist herbivores from different feeding guilds. Overall, review emphasizes on using ubiquitous Solanum genus and working toward building an integrated model which can predict defense-fitness-trade-offs in various systems with maximum accuracy and minimum deviations from realistic results.
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8
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Natale R, Coppola M, D'Agostino N, Zhang Y, Fernie AR, Castaldi V, Rao R. In silico and in vitro approaches allow the identification of the Prosystemin molecular network. Comput Struct Biotechnol J 2022; 21:212-223. [PMID: 36544481 PMCID: PMC9755248 DOI: 10.1016/j.csbj.2022.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 12/05/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022] Open
Abstract
Tomato Prosystemin (ProSys), the precursor of Systemin, a small peptidic hormone, is produced at very low concentration in unchallenged plants, while its expression greatly increases in response to several different stressors triggering an array of defence responses. The molecular mechanisms that underpin such a wide array of defence barriers are not fully understood and are likely correlated with the intrinsically disordered (ID) structure of the protein. ID proteins interact with different protein partners forming complexes involved in the modulation of different biological mechanisms. Here we describe the ProSys-protein network that shed light on the molecular mechanisms underpinning ProSys associated defence responses. Three different approaches were used. In silico prediction resulted in 98 direct interactors, most clustering in phytohormone biosynthesis, transcription factors and signal transduction gene classes. The network shows the central role of ProSys during defence responses, that reflects its role as central hub. In vitro ProSys interactors, identified by Affinity Purification-Mass Spectrometry (AP-MS), revealed over three hundred protein partners, while Bimolecular Fluorescent Complementation (BiFC) experiments validated in vivo some interactors predicted in silico and in vitro. Our results demonstrate that ProSys interacts with several proteins and reveal new key molecular events in the ProSys-dependent defence response of tomato plant.
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Affiliation(s)
- Roberto Natale
- Department of Agricultural Sciences, University of Naples Federico II, Portici 80055, Italy
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam-Golm 14476, Germany
| | - Mariangela Coppola
- Department of Agricultural Sciences, University of Naples Federico II, Portici 80055, Italy
| | - Nunzio D'Agostino
- Department of Agricultural Sciences, University of Naples Federico II, Portici 80055, Italy
| | - Youjun Zhang
- Center of Plant Systems Biology and Biotechnology, Plovdiv 4000, Bulgaria
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam-Golm 14476, Germany
| | - Alisdair Robert Fernie
- Center of Plant Systems Biology and Biotechnology, Plovdiv 4000, Bulgaria
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam-Golm 14476, Germany
| | - Valeria Castaldi
- Department of Agricultural Sciences, University of Naples Federico II, Portici 80055, Italy
| | - Rosa Rao
- Department of Agricultural Sciences, University of Naples Federico II, Portici 80055, Italy
- Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, Portici 80055, Italy
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Molisso D, Coppola M, Buonanno M, Di Lelio I, Aprile AM, Langella E, Rigano MM, Francesca S, Chiaiese P, Palmieri G, Tatè R, Sinno M, Barra E, Becchimanzi A, Monti SM, Pennacchio F, Rao R. Not Only Systemin: Prosystemin Harbors Other Active Regions Able to Protect Tomato Plants. FRONTIERS IN PLANT SCIENCE 2022; 13:887674. [PMID: 35685017 PMCID: PMC9173717 DOI: 10.3389/fpls.2022.887674] [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: 03/01/2022] [Accepted: 04/21/2022] [Indexed: 06/15/2023]
Abstract
Prosystemin is a 200-amino acid precursor expressed in Solanaceae plants which releases at the C-terminal part a peptidic hormone called Systemin in response to wounding and herbivore attack. We recently showed that Prosystemin is not only a mere scaffold of Systemin but, even when deprived of Systemin, is biologically active. These results, combined with recent discoveries that Prosystemin is an intrinsically disordered protein containing disordered regions within its sequence, prompted us to investigate the N-terminal portions of the precursor, which contribute to the greatest disorder within the sequence. To this aim, PS1-70 and PS1-120 were designed, produced, and structurally and functionally characterized. Both the fragments, which maintained their intrinsic disorder, were able to induce defense-related genes and to protect tomato plants against Botrytis cinerea and Spodoptera littoralis larvae. Intriguingly, the biological activity of each of the two N-terminal fragments and of Systemin is similar but not quite the same and does not show any toxicity on experimental non-targets considered. These regions account for different anti-stress activities conferred to tomato plants by their overexpression. The two N-terminal fragments identified in this study may represent new promising tools for sustainable crop protection.
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Affiliation(s)
- Donata Molisso
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Mariangela Coppola
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Martina Buonanno
- Institute of Biostructures and Bioimaging, National Research Council (IBB-CNR), Naples, Italy
| | - Ilaria Di Lelio
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Anna Maria Aprile
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Emma Langella
- Institute of Biostructures and Bioimaging, National Research Council (IBB-CNR), Naples, Italy
| | - Maria Manuela Rigano
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Silvana Francesca
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Pasquale Chiaiese
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Gianna Palmieri
- Institute of Biosciences and BioResources, National Research Council (IBBR-CNR), Naples, Italy
| | - Rosarita Tatè
- Institute of Genetics and Biophysics, National Research Council (IGB-CNR), Naples, Italy
| | - Martina Sinno
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Eleonora Barra
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Andrea Becchimanzi
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Simona Maria Monti
- Institute of Biostructures and Bioimaging, National Research Council (IBB-CNR), Naples, Italy
| | - Francesco Pennacchio
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
- Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, Naples, Italy
| | - Rosa Rao
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
- Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, Naples, Italy
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Agbessenou A, Akutse KS, Yusuf AA, Khamis FM. The Endophyte Trichoderma asperellum M2RT4 Induces the Systemic Release of Methyl Salicylate and ( Z)-jasmone in Tomato Plant Affecting Host Location and Herbivory of Tuta absoluta. FRONTIERS IN PLANT SCIENCE 2022; 13:860309. [PMID: 35449888 PMCID: PMC9016226 DOI: 10.3389/fpls.2022.860309] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 03/11/2022] [Indexed: 05/30/2023]
Abstract
The use of endophytic fungi has dramatically increased plant performance through the enhancement of plant protection against abiotic and biotic stressors. We previously demonstrated that the endophytic fungus Trichoderma asperellum M2RT4 improves tomato defenses against the tomato leafminer Tuta absoluta through the reduction of oviposition, leafmining, pupation, and adult emergence. However, the underlying mechanism by which the presence of this endophytic fungus within tomato host plant affects T. absoluta host selection and life-history traits is unknown. We tested the behavioral responses of T. absoluta in Y-tube olfactometer bioassays and found that females preferred non-inoculated tomato plants against those inoculated by endophytes. Additionally, T. absoluta females were not attracted to non-inoculated infested nor to inoculated-infested tomato plants. Chemical analysis revealed the emission of methyl salicylate in inoculated tomato plant and an increase in the amounts of monoterpenes emitted from non-inoculated infested plants. Additionally, we found that upon herbivory, T. asperellum M2RT4 modulates tomato plant chemistry through the production of (Z)-jasmone thus activating both salicylic and jasmonic acid defense pathways. Further, T. absoluta females were attracted to monoterpernes including α-pinene, 2-carene, and β-phellandrene but repelled by methyl salicylate. Methyl salicylate could therefore be considered as a good semiochemical-based candidate for sustainable T. absoluta management using a "push-pull" approach. However, in dose-response bioassays, females of T. absoluta did not show any preference to the four component-blend (α-pinene, 2-carene, β-phellandrene, and methyl salicylate). (Z)-jasmone-treated tomato leaflets significantly reduced the leafmining activity of the pest at the concentration of 10 ng/μL and causing the highest larval mortality rate (83%) with the shortest LT50 (1.73 days) 7 days post-treatment. T. asperellum M2RT4 effect on herbivore performance was then (Z)-jasmone-mediated. These findings expand our understanding of how the endophytic fungus T. asperellum M2RT4 could mediate chemical interactions between T. absoluta and its host plant which are potentially important for development of environmentally friendly T. absoluta management programs.
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Affiliation(s)
- Ayaovi Agbessenou
- International Centre of Insect Physiology and Ecology, Nairobi, Kenya
- Department of Zoology and Entomology, University of Pretoria, Hatfield, South Africa
| | - Komivi S. Akutse
- International Centre of Insect Physiology and Ecology, Nairobi, Kenya
| | - Abdullahi A. Yusuf
- Department of Zoology and Entomology, University of Pretoria, Hatfield, South Africa
- Forestry and Agricultural Biotechnology Institute, University of Pretoria, Hatfield, South Africa
| | - Fathiya M. Khamis
- International Centre of Insect Physiology and Ecology, Nairobi, Kenya
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11
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Molisso D, Coppola M, Buonanno M, Di Lelio I, Monti SM, Melchiorre C, Amoresano A, Corrado G, Delano-Frier JP, Becchimanzi A, Pennacchio F, Rao R. Tomato Prosystemin Is Much More than a Simple Systemin Precursor. BIOLOGY 2022; 11:biology11010124. [PMID: 35053122 PMCID: PMC8772835 DOI: 10.3390/biology11010124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/23/2021] [Accepted: 12/25/2021] [Indexed: 02/04/2023]
Abstract
Simple Summary Prosystemin is a 200 amino acid precursor that releases, upon wounding and biotic attacks, an 18 amino acid peptide called Systemin. This peptide was traditionally considered as the principal actor of the resistance of tomato plants induced by triggering multiple defense pathways in response to a wide range of biotic/abiotic stress agents. Recent findings from our group discovered the disordered structure of Prosystemin that promotes the binding of different molecular partners and the possible activation of multiple stress-related pathways. All of our recent findings suggest that Prosystemin could be more than a simple precursor of Systemin peptide. Indeed, we hypothesized that it contains other sequences able to activate multiple stress-related responses. To verify this hypothesis, we produced a truncated Prosystemin protein deprived of the Systemin peptide and the relative deleted gene. Experiments with transgenic tomato plants overexpressing the truncated Prosystemin and with plants exogenously treated with the recombinant truncated protein demonstrated that both transgenic and treated plants modulated the expression of defense-related genes and were protected against a noctuid moth and a fungal pathogen. Taken together, our results demonstrated that Prosystemin is not a mere scaffold of Systemin, but itself contains other biologically active regions. Abstract Systemin (Sys) is an octadecapeptide, which upon wounding, is released from the carboxy terminus of its precursor, Prosystemin (ProSys), to promote plant defenses. Recent findings on the disordered structure of ProSys prompted us to investigate a putative biological role of the whole precursor deprived of the Sys peptide. We produced transgenic tomato plants expressing a truncated ProSys gene in which the exon coding for Sys was removed and compared their defense response with that induced by the exogenous application of the recombinant truncated ProSys (ProSys(1-178), the Prosystemin sequence devoid of Sys region). By combining protein structure analyses, transcriptomic analysis, gene expression profiling and bioassays with different pests, we demonstrate that truncated ProSys promotes defense barriers in tomato plants through a hormone-independent defense pathway, likely associated with the production of oligogalacturonides (OGs). Both transgenic and plants treated with the recombinant protein showed the modulation of the expression of genes linked with defense responses and resulted in protection against the lepidopteran pest Spodoptera littoralis and the fungus Botrytis cinerea. Our results suggest that the overall function of the wild-type ProSys is more complex than previously shown, as it might activate at least two tomato defense pathways: the well-known Sys-dependent pathway connected with the induction of jasmonic acid biosynthesis and the successive activation of a set of defense-related genes, and the ProSys(1-178)-dependent pathway associated with OGs production leading to the OGs mediate plant immunity.
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Affiliation(s)
- Donata Molisso
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Naples, Italy; (D.M.); (M.C.); (I.D.L.); (G.C.); (A.B.); (F.P.)
- Materias s.r.l., Corso N. Protopisani 50, 80146 Naples, Italy
| | - Mariangela Coppola
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Naples, Italy; (D.M.); (M.C.); (I.D.L.); (G.C.); (A.B.); (F.P.)
| | - Martina Buonanno
- Istituto di Biostrutture e Bioimmagini-CNR, Via Mezzocannone 16, 80134 Naples, Italy;
| | - Ilaria Di Lelio
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Naples, Italy; (D.M.); (M.C.); (I.D.L.); (G.C.); (A.B.); (F.P.)
| | - Simona Maria Monti
- Istituto di Biostrutture e Bioimmagini-CNR, Via Mezzocannone 16, 80134 Naples, Italy;
- Correspondence: (S.M.M.); (R.R.)
| | - Chiara Melchiorre
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cinthia 4, 80126 Naples, Italy; (C.M.); (A.A.)
| | - Angela Amoresano
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cinthia 4, 80126 Naples, Italy; (C.M.); (A.A.)
| | - Giandomenico Corrado
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Naples, Italy; (D.M.); (M.C.); (I.D.L.); (G.C.); (A.B.); (F.P.)
| | - John Paul Delano-Frier
- Center for Research and Advanced Studies (CINVESTAV) Irapuato, Department of Biochemistry and Biotechnology, Km. 9.6 Libramiento Norte Carretera Irapuato-León, Irapuato 36500, Mexico;
| | - Andrea Becchimanzi
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Naples, Italy; (D.M.); (M.C.); (I.D.L.); (G.C.); (A.B.); (F.P.)
| | - Francesco Pennacchio
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Naples, Italy; (D.M.); (M.C.); (I.D.L.); (G.C.); (A.B.); (F.P.)
- Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, Via Università 100, 80055 Naples, Italy
| | - Rosa Rao
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Naples, Italy; (D.M.); (M.C.); (I.D.L.); (G.C.); (A.B.); (F.P.)
- Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, Via Università 100, 80055 Naples, Italy
- Correspondence: (S.M.M.); (R.R.)
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12
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Sugimoto K, Iijima Y, Takabayashi J, Matsui K. Processing of Airborne Green Leaf Volatiles for Their Glycosylation in the Exposed Plants. FRONTIERS IN PLANT SCIENCE 2021; 12:721572. [PMID: 34868107 PMCID: PMC8636985 DOI: 10.3389/fpls.2021.721572] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 10/14/2021] [Indexed: 05/30/2023]
Abstract
Green leaf volatiles (GLVs), the common constituents of herbivore-infested plant volatiles (HIPVs), play an important role in plant defense and function as chemical cues to communicate with other individuals in nature. Reportedly, in addition to endogenous GLVs, the absorbance of airborne GLVs emitted by infested neighboring plants also play a major role in plant defense. For example, the exclusive accumulation of (Z)-3-hexenyl vicianoside in the HIPV-exposed tomato plants occurs by the glycosylation of airborne (Z)-3-hexenol (Z3HOL); however, it is unclear how plants process the other absorbed GLVs. This study demonstrates that tomato plants dominantly accumulated GLV-glycosides after exposure to green leaf alcohols [Z3HOL, (E)-2-hexenol, and n-hexanol] using non-targeted LC-MS analysis. Three types of green leaf alcohols were independently glycosylated without isomerization or saturation/desaturation. Airborne green leaf aldehydes and esters were also glycosylated, probably through converting aldehydes and esters into alcohols. Further, we validated these findings in Arabidopsis mutants- (Z)-3-hexenal (Z3HAL) reductase (chr) mutant that inhibits the conversion of Z3HAL to Z3HOL and the acetyl-CoA:(Z)-3-hexen-1-ol acetyltransferase (chat) mutant that impairs the conversion of Z3HOL to (Z)-3-hexenyl acetate. Exposure of the chr and chat mutants to Z3HAL accumulated lower and higher amounts of glycosides than their corresponding wild types (Col-0 and Ler), respectively. These findings suggest that plants process the exogenous GLVs by the reductase(s) and the esterase(s), and a part of the processed GLVs contribute to glycoside accumulation. Overall, the study provides insights into the understanding of the communication of the plants within their ecosystem, which could help develop strategies to protect the crops and maintain a balanced ecosystem.
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Affiliation(s)
- Koichi Sugimoto
- Tsukuba-Plant Innovation Research Center, University of Tsukuba, Tsukuba, Japan
| | - Yoko Iijima
- Department of Applied Chemistry, Kogakuin University, Tokyo, Japan
| | | | - Kenji Matsui
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, Japan
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13
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Ederli L, Salerno G, Quaglia M. In the tripartite combination Botrytis cinerea-Arabidopsis-Eurydema oleracea, the fungal pathogen alters the plant-insect interaction via jasmonic acid signalling activation and inducible plant-emitted volatiles. JOURNAL OF PLANT RESEARCH 2021; 134:523-533. [PMID: 33738682 PMCID: PMC8106584 DOI: 10.1007/s10265-021-01273-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 02/19/2021] [Indexed: 05/28/2023]
Abstract
In ecosystems, plants are continuously challenged by combined stress conditions more than by a single biotic or abiotic factor. Consequently, in recent years studies on plant relationships with multiple stresses have aroused increasing interest. Here, the impact of inoculation with fungal pathogens with different lifestyles on Arabidopsis plants response to the following infestation with the invasive crop pest Eurydema oleracea was investigated. In particular, as fungal pathogens the necrotroph Botrytis cinerea and the biotroph Golovinomyces orontii were used. Plants exposed to B. cinerea, but not to G. orontii, showed reduced herbivore feeding damage. This difference was associated to different hormonal pathways triggered by the pathogens: G. orontii only induced the salicylate-mediated pathway, while B. cinerea stimulated also the jasmonate-dependent signalling, which persisted for a long time providing a long-term defence to further herbivore attack. In particular, the lower susceptibility of B. cinerea-infected Arabidopsis plants to E. oleracea was related to the stimulation of the JA-induced pathway on the production of plant volatile compounds, since treatment with VOCs emitted by B. cinerea inoculated plants inhibited both insect plant choice and feeding damage. These results indicate that necrotrophic plant pathogenic fungi modulate host volatile emission, thus affecting plant response to subsequent insect, thereby increasing the knowledge on tripartite plant-microbe-insect interactions in nature.
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Affiliation(s)
- Luisa Ederli
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, Perugia, 06121, Italy
| | - Gianandrea Salerno
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, Perugia, 06121, Italy.
| | - Mara Quaglia
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, Perugia, 06121, Italy
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14
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Abbas F, Ke Y, Zhou Y, Yu Y, Waseem M, Ashraf U, Wang C, Wang X, Li X, Yue Y, Yu R, Fan Y. Genome-Wide Analysis Reveals the Potential Role of MYB Transcription Factors in Floral Scent Formation in Hedychium coronarium. FRONTIERS IN PLANT SCIENCE 2021; 12:623742. [PMID: 33719296 PMCID: PMC7952619 DOI: 10.3389/fpls.2021.623742] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 01/11/2021] [Indexed: 05/19/2023]
Abstract
The MYB gene family is one of the largest groups of transcription factors (TFs) playing diverse roles in several biological processes. Hedychium coronarium (white ginger lily) is a renowned ornamental plant both in tropical and subtropical regions due to its flower shape and strong floral scent mainly composed of terpenes and benzenoids. However, there is no information available regarding the role of the MYB gene family in H. coronarium. In the current study, the MYB gene family was identified and extensively analyzed. The identified 253 HcMYB genes were unevenly mapped on 17 chromosomes at a different density. Promoter sequence analysis showed numerous phytohormones related to cis-regulatory elements. The majority of HcMYB genes contain two to three introns and motif composition analysis showed their functional conservation. Phylogenetic analysis revealed that HcMYBs could be classified into 15 distinct clades, and the segmental duplication events played an essential role in the expansion of the HcMYB gene family. Tissue-specific expression patterns of HcMYB genes displayed spatial and temporal expression. Furthermore, seven HcMYB (HcMYB7/8/75/79/145/238/248) were selected for further investigation. Through RT-qPCR, the response of candidates HcMYB genes toward jasmonic acid methyl ester (MeJA), abscisic acid (ABA), ethylene, and auxin was examined. Yeast one-hybrid (Y1H) assays revealed that candidate genes directly bind to the promoter of bottom structural volatile synthesis genes (HcTPS1, HcTPS3, HcTPS10, and HcBSMT2). Moreover, yeast two-hybrid (Y2H) assay showed that HcMYB7/8/75/145/248 interact with HcJAZ1 protein. In HcMYB7/8/79/145/248-silenced flowers, the floral volatile contents were decreased and downregulated the expression of key structural genes, suggesting that these genes might play crucial roles in floral scent formation in H. coronarium by regulating the expression of floral scent biosynthesis genes. Collectively, these findings indicate that HcMYB genes might be involved in the regulatory mechanism of terpenoids and benzenoid biosynthesis in H. coronarium.
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Affiliation(s)
- Farhat Abbas
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Yanguo Ke
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
- College of Economics and Management, Kunming University, Kunming, China
| | - Yiwei Zhou
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Yunyi Yu
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Muhammad Waseem
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Umair Ashraf
- Department of Botany, Division of Science and Technology, University of Education, Lahore, Punjab, Pakistan
| | - Chutian Wang
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Xiaoyu Wang
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Xinyue Li
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Yuechong Yue
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Rangcai Yu
- College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Yanping Fan
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, South China Agricultural University, Guangzhou, China
- *Correspondence: Yanping Fan,
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15
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Sun Z, Lin Y, Wang R, Li Q, Shi Q, Baerson SR, Chen L, Zeng R, Song Y. Olfactory perception of herbivore‐induced plant volatiles elicits counter‐defences in larvae of the tobacco cutworm. Funct Ecol 2020. [DOI: 10.1111/1365-2435.13716] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Zhongxiang Sun
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops College of Agriculture Fujian Agriculture and Forestry University Fuzhou China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops College of Life Sciences Fujian Agriculture and Forestry University Fuzhou China
| | - Yibin Lin
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops College of Life Sciences Fujian Agriculture and Forestry University Fuzhou China
| | - Rumeng Wang
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops College of Agriculture Fujian Agriculture and Forestry University Fuzhou China
| | - Qilin Li
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops College of Agriculture Fujian Agriculture and Forestry University Fuzhou China
| | - Qi Shi
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops College of Life Sciences Fujian Agriculture and Forestry University Fuzhou China
| | - Scott R. Baerson
- United States Department of Agriculture‐Agricultural Research Service Natural Products Utilization Research Unit, University Oxford MS USA
| | - Li Chen
- State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of Zoology Chinese Academy of Sciences Beijing P. R. China
| | - Rensen Zeng
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops College of Agriculture Fujian Agriculture and Forestry University Fuzhou China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops College of Life Sciences Fujian Agriculture and Forestry University Fuzhou China
| | - Yuanyuan Song
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops College of Agriculture Fujian Agriculture and Forestry University Fuzhou China
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16
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Kihika R, Tchouassi DP, Ng'ang'a MM, Hall DR, Beck JJ, Torto B. Compounds Associated with Infection by the Root-Knot Nematode, Meloidogyne javanica, Influence the Ability of Infective Juveniles to Recognize Host Plants. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:9100-9109. [PMID: 32786872 DOI: 10.1021/acs.jafc.0c03386] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Plant root chemistry is altered by the parasitism of plant-parasitic nematodes (PPN). Here, we investigated the influence of the infective stage juveniles (J2) of Meloidogyne javanica in inducing tomato (Solanum lycopersicum) root volatiles and chemotactic effect on conspecifics. In olfactometer assays, J2 avoided the roots of 2-day infected plants but preferred 7-day-infected tomato compared to healthy plants. Chemical analysis showed a 2-7-fold increase in the amounts of monoterpenes emitted from tomato roots infected with M. javanica relative to healthy roots. In further bioassays, the monoterpenes β-pinene, (+)-(2)-carene, α-phellandrene, and β-phellandrene differentially attracted (51-87%) J2 relative to control. Concurrent reduction and increase in the levels of methyl salicylate and (Z)-methyl dihydrojasmonate, respectively, in the root volatiles reduced J2 responses. These results demonstrate that the host plant can alter its root volatile composition to inhibit PPN attack. The observed plant-produced inhibition of J2 warrants further investigation as a potential management tool for growers.
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Affiliation(s)
- Ruth Kihika
- Behavioral and Chemical Ecology Unit, International Centre of Insect Physiology and Ecology (icipe), P.O. Box 30772-00100, Nairobi, Kenya
- Department of Chemistry, Kenyatta University, P.O. Box 43844-00100, Nairobi, Kenya
| | - David P Tchouassi
- Behavioral and Chemical Ecology Unit, International Centre of Insect Physiology and Ecology (icipe), P.O. Box 30772-00100, Nairobi, Kenya
| | - Margaret M Ng'ang'a
- Department of Chemistry, Kenyatta University, P.O. Box 43844-00100, Nairobi, Kenya
| | - David R Hall
- Natural Resources Institute, University of Greenwich-Medway Campus, Central Avenue, Chatham Maritime, Kent ME4 4TB, United Kingdom
| | - John J Beck
- Chemistry Research Unit, Center for Medical, Agricultural, and Veterinary Entomology, Agricultural Research Service, U.S. Department of Agriculture, 1700 SW 23rd Drive, Gainesville, Florida 32608, United States
| | - Baldwyn Torto
- Behavioral and Chemical Ecology Unit, International Centre of Insect Physiology and Ecology (icipe), P.O. Box 30772-00100, Nairobi, Kenya
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17
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Zhang H, Zhang H, Lin J. Systemin-mediated long-distance systemic defense responses. THE NEW PHYTOLOGIST 2020; 226:1573-1582. [PMID: 32083726 DOI: 10.1111/nph.16495] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 02/13/2020] [Indexed: 05/20/2023]
Abstract
Systemin, a peptide plant hormone of 18 amino acids, coordinates local and systemic immune responses. The activation of the canonical systemin-mediated systemic signaling pathway involves systemin release from its precursor prosystemin, systemin binding to its membrane receptor SYSTEMIN RECEPTOR1 (SYR1), and the transport of long-distance signaling molecules, including jasmonic acid, the prosystemin mRNA, volatile organic compounds and possibly systemin itself. Here, we review emerging evidence that the disordered structure and unconventional processing and secretion of systemin contribute to the regulation of systemin-mediated signaling during plant defense. We highlight recent advances in systemin research, which elucidated how cells integrate multiple long-distance signals into the systemic defense response. In addition, we discuss the perception of systemin by SYR1 and its mediation of downstream defense responses.
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Affiliation(s)
- Haiyan Zhang
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, 300387, China
| | - Hui Zhang
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Jinxing Lin
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design and College of Biological Sciences, Beijing Forestry University, Beijing, 100083, China
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18
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Gollan PJ, Aro EM. Photosynthetic signalling during high light stress and recovery: targets and dynamics. Philos Trans R Soc Lond B Biol Sci 2020; 375:20190406. [PMID: 32362249 DOI: 10.1098/rstb.2019.0406] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The photosynthetic apparatus is one of the major primary sensors of the plant's external environment. Changes in environmental conditions affect the balance between harvested light energy and the capacity to deal with excited electrons in the stroma, which alters the redox homeostasis of the photosynthetic electron transport chain. Disturbances to redox balance activate photosynthetic regulation mechanisms and trigger signalling cascades that can modify the transcription of nuclear genes. H2O2 and oxylipins have been identified as especially prominent regulators of gene expression in response to excess light stress. This paper explores the hypothesis that photosynthetic imbalance triggers specific signals that target discrete gene profiles and biological processes. Analysis of the major retrograde signalling pathways engaged during high light stress and recovery demonstrates both specificity and overlap in gene targets. This work reveals distinct, time-resolved profiles of gene expression that suggest a regulatory interaction between rapidly activated abiotic stress response and induction of secondary metabolism and detoxification processes during recovery. The findings of this study show that photosynthetic electron transport provides a finely tuned sensor for detecting and responding to the environment through chloroplast retrograde signalling. This article is part of the theme issue 'Retrograde signalling from endosymbiotic organelles'.
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Affiliation(s)
- Peter J Gollan
- Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland
| | - Eva-Mari Aro
- Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland
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19
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Grissett L, Ali A, Coble AM, Logan K, Washington B, Mateson A, McGee K, Nkrumah Y, Jacobus L, Abraham E, Hann C, Bequette CJ, Hind SR, Schmelz EA, Stratmann JW. Survey of Sensitivity to Fatty Acid-Amino Acid Conjugates in the Solanaceae. J Chem Ecol 2020; 46:330-343. [PMID: 31989490 DOI: 10.1007/s10886-020-01152-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/07/2020] [Accepted: 01/17/2020] [Indexed: 12/17/2022]
Abstract
Plants perceive insect herbivores via a sophisticated surveillance system that detects a range of alarm signals, including herbivore-associated molecular patterns (HAMPs). Fatty acid-amino acid conjugates (FACs) are HAMPs present in oral secretions (OS) of lepidopteran larvae that induce defense responses in many plant species. In contrast to eggplant (Solanum melongena), tomato (S. lycopersicum) does not respond to FACs present in OS from Manduca sexta (Lepidoptera). Since both plants are found in the same genus, we tested whether loss of sensitivity to FACs in tomato may be a domestication effect. Using highly sensitive MAP kinase (MAPK) phosphorylation assays, we demonstrate that four wild tomato species and the closely related potato (S. tuberosum) do not respond to the FACs N-linolenoyl-L-glutamine and N-linolenoyl-L-glutamic acid, excluding a domestication effect. Among other genera within the Solanaceae, we found that bell pepper (Capsicum annuum) is responsive to FACs, while there is a differential responsiveness to FACs among tobacco (Nicotiana) species, ranging from strong responsiveness in N. benthamiana to no responsiveness in N. knightiana. The Petunia lineage is one of the oldest lineages within the Solanaceae and P. hybrida was responsive to FACs. Collectively, we demonstrate that plant responsiveness to FACs does not follow simple phylogenetic relationships in the family Solanaceae. Instead, sensitivity to FACs is a dynamic ancestral trait present in monocots and eudicots that was repeatedly lost during the evolution of Solanaceae species. Although tomato is insensitive to FACs, we found that other unidentified factors in M. sexta OS induce defenses in tomato.
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Affiliation(s)
- Laquita Grissett
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA.,Fred Hutchinson Cancer Research Center, University of Washington School of Dentistry, Seattle, WA, USA
| | - Azka Ali
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA
| | - Anne-Marie Coble
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA
| | - Khalilah Logan
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA
| | - Brandon Washington
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA
| | - Abigail Mateson
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA
| | - Kelsey McGee
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA
| | - Yaw Nkrumah
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA
| | - Leighton Jacobus
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA
| | - Evelyn Abraham
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA.,Department of Plant Biology, Pennsylvania State University, University Park, PA, USA
| | - Claire Hann
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA
| | - Carlton J Bequette
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA.,R.J. Reynolds Tobacco, Winston-Salem, NC, USA
| | - Sarah R Hind
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA.,Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Eric A Schmelz
- Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, CA, 92093, USA
| | - Johannes W Stratmann
- Department of Biological Sciences, University of South Carolina, Columbia, SC, USA.
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20
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Meents AK, Mithöfer A. Plant-Plant Communication: Is There a Role for Volatile Damage-Associated Molecular Patterns? FRONTIERS IN PLANT SCIENCE 2020; 11:583275. [PMID: 33178248 PMCID: PMC7593327 DOI: 10.3389/fpls.2020.583275] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/17/2020] [Indexed: 05/16/2023]
Abstract
Damage-associated molecular patterns (DAMPs) are an ancient form of tissue-derived danger or alarm signals that initiate cellular signaling cascades, which often initiate defined defense responses. A DAMP can be any molecule that is usually not exposed to cells such as cell wall components, peptides, nucleic acid fragments, eATP and other compounds. DAMPs might be revealed upon tissue damage or during attack. Typically, DAMPs are derived from the injured organism. Almost all eukaryotes can generate and respond to DAMPs, including plants. Besides the molecules mentioned, certain volatile organic compounds (VOCs) can be considered as DAMPs. Due to their chemical nature, VOCs are supposed to act not only locally and systemically in the same plant but also between plants. Here, we focus on damage-induced volatiles (DIVs) that might be regarded as DAMPs; we will review their origin, chemical nature, physiochemical properties, biological relevance and putative function in plant-plant communications. Moreover, we discuss the possibility to use such airborne DAMPs as eco-friendly compounds to stimulate natural defenses in agriculture in order to avoid pesticides.
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21
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Coppola M, Di Lelio I, Romanelli A, Gualtieri L, Molisso D, Ruocco M, Avitabile C, Natale R, Cascone P, Guerrieri E, Pennacchio F, Rao R. Tomato Plants Treated with Systemin Peptide Show Enhanced Levels of Direct and Indirect Defense Associated with Increased Expression of Defense-Related Genes. PLANTS 2019; 8:plants8100395. [PMID: 31623335 PMCID: PMC6843623 DOI: 10.3390/plants8100395] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/25/2019] [Accepted: 10/01/2019] [Indexed: 01/11/2023]
Abstract
Plant defense peptides represent an important class of compounds active against pathogens and insects. These molecules controlling immune barriers can potentially be used as novel tools for plant protection, which mimic natural defense mechanisms against invaders. The constitutive expression in tomato plants of the precursor of the defense peptide systemin was previously demonstrated to increase tolerance against moth larvae and aphids and to hamper the colonization by phytopathogenic fungi, through the expression of a wealth of defense-related genes. In this work we studied the impact of the exogenous supply of systemin to tomato plants on pests to evaluate the use of the peptide as a tool for crop protection in non-transgenic approaches. By combining gene expression studies and bioassays with different pests we demonstrate that the exogenous supply of systemin to tomato plants enhances both direct and indirect defense barriers. Experimental plants, exposed to this peptide by foliar spotting or root uptake through hydroponic culture, impaired larval growth and development of the noctuid moth Spodoptera littoralis, even across generations, reduced the leaf colonization by the fungal pathogen Botrytis cinerea and were more attractive towards natural herbivore antagonists. The induction of these defense responses was found to be associated with molecular and biochemical changes under control of the systemin signalling cascade. Our results indicate that the direct delivery of systemin, likely characterized by a null effect on non-target organisms, represents an interesting tool for the sustainable protection of tomato plants.
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Affiliation(s)
- Mariangela Coppola
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055 Portici, Italy; (M.C.); (I.D.L.); (D.M.)
| | - Ilaria Di Lelio
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055 Portici, Italy; (M.C.); (I.D.L.); (D.M.)
| | - Alessandra Romanelli
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Venezian 21, 20133 Milano, Italy;
| | | | - Donata Molisso
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055 Portici, Italy; (M.C.); (I.D.L.); (D.M.)
| | - Michelina Ruocco
- CNR-IPSP, Via Università 133, 80055 Portici, Italy; (L.G.); (M.R.)
| | | | - Roberto Natale
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055 Portici, Italy; (M.C.); (I.D.L.); (D.M.)
| | - Pasquale Cascone
- CNR-IPSP, Via Università 133, 80055 Portici, Italy; (L.G.); (M.R.)
| | - Emilio Guerrieri
- CNR-IPSP, Via Università 133, 80055 Portici, Italy; (L.G.); (M.R.)
| | - Francesco Pennacchio
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055 Portici, Italy; (M.C.); (I.D.L.); (D.M.)
| | - Rosa Rao
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055 Portici, Italy; (M.C.); (I.D.L.); (D.M.)
- Correspondence: ; Tel.: +39-081-2539204
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22
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Airborne host-plant manipulation by whiteflies via an inducible blend of plant volatiles. Proc Natl Acad Sci U S A 2019; 116:7387-7396. [PMID: 30910967 PMCID: PMC6462071 DOI: 10.1073/pnas.1818599116] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The whitefly Bemisia tabaci is one of the world's most important invasive crop pests, possibly because it manipulates plant defense signaling. Upon infestation by whiteflies, plants mobilize salicylic acid (SA)-dependent defenses, which mainly target pathogens. In contrast, jasmonic acid (JA)-dependent defenses are gradually suppressed in whitefly-infested plants. The down-regulation of JA defenses make plants more susceptible to insects, including whiteflies. Here, we report that this host-plant manipulation extends to neighboring plants via airborne signals. Plants respond to insect attack with the release of a blend of inducible volatiles. Perception of these volatiles by neighboring plants usually primes them to prepare for an imminent attack. Here, however, we show that whitefly-induced tomato plant volatiles prime SA-dependent defenses and suppress JA-dependent defenses, thus rendering neighboring tomato plants more susceptible to whiteflies. Experiments with volatiles from caterpillar-damaged and pathogen-infected plants, as well as with synthetic volatiles, confirm that whiteflies modify the quality of neighboring plants for their offspring via whitefly-inducible plant volatiles.
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23
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Different Pathogen Defense Strategies in Arabidopsis: More than Pathogen Recognition. Cells 2018; 7:cells7120252. [PMID: 30544557 PMCID: PMC6315839 DOI: 10.3390/cells7120252] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 11/26/2018] [Accepted: 12/03/2018] [Indexed: 01/03/2023] Open
Abstract
Plants constantly suffer from simultaneous infection by multiple pathogens, which can be divided into biotrophic, hemibiotrophic, and necrotrophic pathogens, according to their lifestyles. Many studies have contributed to improving our knowledge of how plants can defend against pathogens, involving different layers of defense mechanisms. In this sense, the review discusses: (1) the functions of PAMP (pathogen-associated molecular pattern)-triggered immunity (PTI) and effector-triggered immunity (ETI), (2) evidence highlighting the functions of salicylic acid (SA) and jasmonic acid (JA)/ethylene (ET)-mediated signaling pathways downstream of PTI and ETI, and (3) other defense aspects, including many novel small molecules that are involved in defense and phenomena, including systemic acquired resistance (SAR) and priming. In particular, we mainly focus on SA and (JA)/ET-mediated signaling pathways. Interactions among them, including synergistic effects and antagonistic effects, are intensively explored. This might be critical to understanding dynamic disease regulation.
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24
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Montero-Vargas JM, Casarrubias-Castillo K, Martínez-Gallardo N, Ordaz-Ortiz JJ, Délano-Frier JP, Winkler R. Modulation of steroidal glycoalkaloid biosynthesis in tomato (Solanum lycopersicum) by jasmonic acid. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 277:155-165. [PMID: 30466581 DOI: 10.1016/j.plantsci.2018.08.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 08/03/2018] [Accepted: 08/29/2018] [Indexed: 06/09/2023]
Abstract
Jasmonic acid (JA) is a phytohormone involved in plant development and defense. A major role of JA is the enhancement of secondary metabolite production, such as response to herbivory. Systemin is a bioactive plant peptide of 18 amino acids that contributes to the induction of local and systemic defense responses in tomato (Solanum lycopersicum) through JA biosynthesis. The overexpression of systemin (PS-OE) results in constitutive JA accumulation and enhances pest resistance in plants. Conversely, mutant plants affected in linolenic acid synthesis (spr2) are negatively compromised in the production of JA which favors damage and oviposition by insect herbivores. With undirected mass fingerprinting analyses, we found global metabolic differences between genotypes with modified jasmonic acid production. The spr2 mutants were enriched in di-unsaturated fatty acids and generally showed more changes. The PS-OE genotype produced an unidentified compound with a mass-to-charge ratio of 695 (MZ695). Most strikingly, the steroidal glycoalkaloid biosynthesis was negatively affected in the spr2 genotype. Complementation with jasmonic acid could restore the tomatine pathway, which strongly suggests the control of steroidal glycoalkaloid biosynthesis by jasmonic acid. spr2 plants were more susceptible to fungal infection with Fusarium oxysporum f.sp. ciceris, but not to bacterial infection with Clavibacter michiganensis subsp. michiganensis which supports the involvement of steroidal glycoalkaloids in the plant response against fungi.
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Affiliation(s)
- Josaphat Miguel Montero-Vargas
- Center for Research and Advanced Studies (CINVESTAV) Irapuato, Department of Biochemistry and Biotechnology, Km. 9.6 Libramiento Norte Carr. Irapuato-León, 36824 Irapuato Gto., Mexico
| | - Kena Casarrubias-Castillo
- Universidad de Guadalajara, Centro Universitario de Ciencias Biológicas y Agropecuarias, Camino Ing., La Venta del Astillero, 44600 Zapopan, Jalisco, Mexico
| | - Norma Martínez-Gallardo
- Center for Research and Advanced Studies (CINVESTAV) Irapuato, Department of Biochemistry and Biotechnology, Km. 9.6 Libramiento Norte Carr. Irapuato-León, 36824 Irapuato Gto., Mexico
| | - José Juan Ordaz-Ortiz
- Unidad de Genómica Avanzada (UGA) - Laboratorio Nacional de Genómica para la Biodiversidad (LANGEBIO), Km. 9.6 Libramiento Norte Carr. Irapuato-León, 36824 Irapuato Gto., Mexico
| | - John Paul Délano-Frier
- Center for Research and Advanced Studies (CINVESTAV) Irapuato, Department of Biochemistry and Biotechnology, Km. 9.6 Libramiento Norte Carr. Irapuato-León, 36824 Irapuato Gto., Mexico.
| | - Robert Winkler
- Center for Research and Advanced Studies (CINVESTAV) Irapuato, Department of Biochemistry and Biotechnology, Km. 9.6 Libramiento Norte Carr. Irapuato-León, 36824 Irapuato Gto., Mexico.
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25
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Chen G, Klinkhamer PGL, Escobar-Bravo R, Leiss KA. Type VI glandular trichome density and their derived volatiles are differently induced by jasmonic acid in developing and fully developed tomato leaves: Implications for thrips resistance. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 276:87-98. [PMID: 30348331 DOI: 10.1016/j.plantsci.2018.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Revised: 08/14/2018] [Accepted: 08/17/2018] [Indexed: 05/08/2023]
Abstract
Variation in the induction of plant defenses along the plant canopy can determine distribution and colonization of arthropod herbivores within the plant. In tomato, type VI glandular trichomes, which are epidermal defensive structures, and their derived volatiles are induced by the phytohormone jasmonic acid (JA). How JA-mediated induction of these trichome-associated chemical defenses depends on the leaf developmental stage and correlates with resistance against herbivory is unknown. We showed that application of JA reduced thrips-associated damage, however the amplitude of this response was reduced in the fully developed leaves compared to those still developing. Although JA increased type-VI trichome densities in all leaf developmental stages, as well as JA-inducible defensive proteins, these increases were stronger in developing leaves. Remarkably, the concentration of trichome-derived volatiles was induced by JA to a larger degree in developing leaves than in fully developed leaves. In fully developed leaves, the increase in trichome-derived volatiles was explained by an enhanced production per trichome, while in developing leaves this was mainly caused by increases in type-VI trichome densities. Together, we showed that JA-mediated induction of trichome density and chemistry depends on leaf development stage, and it might explain the degree of thrips-associated leaf damage in tomato.
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Affiliation(s)
- Gang Chen
- Plant Sciences and Natural Products, Institute of Biology (IBL), Leiden University, Sylviusweg 72, 2333BE, Leiden, The Netherlands.
| | - Peter G L Klinkhamer
- Plant Sciences and Natural Products, Institute of Biology (IBL), Leiden University, Sylviusweg 72, 2333BE, Leiden, The Netherlands
| | - Rocío Escobar-Bravo
- Plant Sciences and Natural Products, Institute of Biology (IBL), Leiden University, Sylviusweg 72, 2333BE, Leiden, The Netherlands
| | - Kirsten A Leiss
- Plant Sciences and Natural Products, Institute of Biology (IBL), Leiden University, Sylviusweg 72, 2333BE, Leiden, The Netherlands
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26
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Liu B, Kaurilind E, Jiang Y, Niinemets Ü. Methyl salicylate differently affects benzenoid and terpenoid volatile emissions in Betula pendula. TREE PHYSIOLOGY 2018; 38:1513-1525. [PMID: 29931321 PMCID: PMC6863746 DOI: 10.1093/treephys/tpy050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 04/18/2018] [Indexed: 05/05/2023]
Abstract
Methyl salicylate (MeSA) is a long-distance signal transduction chemical that plays an important role in plant responses to abiotic stress and herbivore and pathogen attacks. However, it is unclear how photosynthesis and elicitation of plant volatile organic compounds (VOC) from different metabolic pathways respond to the dose of MeSA. We applied different MeSA concentrations (0-50 mM) to study how exogenous MeSA alters VOC profiles of silver birch (Betula pendula Roth) leaves from application through recovery (0.5-23 h). Methyl salicylate application significantly reduced net assimilation rate in 10 mM and 20 mM MeSA-treated plants. No significant effects of MeSA were observed on the stomatal conductance at any MeSA concentration. Methyl salicylate elicited emissions of benzenoids (BZ), monoterpenes (MT) and fatty acid derived compounds (LOX products). Emission rates of BZ were positively, but emission rates of MT were negatively correlated with MeSA concentration. Total emission of LOX products was not influenced by MeSA concentration. Emission rate of MT was negatively correlated with BZ and the share of MT in the total emission blend decreased and the share of BZ increased with increasing MeSA concentration. Although the share of LOX products was similar across MeSA treatments, some LOX products responded differently to MeSA concentration, ultimately resulting in unique VOC blends. Overall, this study demonstrates inverse responses of MT and BZ to different MeSA doses such that plant defense mechanisms induced by lower MeSA doses mainly lead to enhanced MT synthesis, whereas greater MeSA doses trigger BZ-related defense mechanisms. Our results will contribute to improving the understanding of birch defenses induced upon regular herbivore attacks and pathogen infections in boreal forests.
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Affiliation(s)
- Bin Liu
- Chair of Crop Science and Plant Biology, Estonian University of Life
Sciences, Kreutzwaldi 1, Tartu 51014, Estonia
| | - Eve Kaurilind
- Chair of Crop Science and Plant Biology, Estonian University of Life
Sciences, Kreutzwaldi 1, Tartu 51014, Estonia
| | - Yifan Jiang
- Chair of Crop Science and Plant Biology, Estonian University of Life
Sciences, Kreutzwaldi 1, Tartu 51014, Estonia
| | - Ülo Niinemets
- Chair of Crop Science and Plant Biology, Estonian University of Life
Sciences, Kreutzwaldi 1, Tartu 51014, Estonia
- Estonian Academy of Sciences, Kohtu 6, Tallinn 10130, Estonia
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27
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TPS Genes Silencing Alters Constitutive Indirect and Direct Defense in Tomato. Int J Mol Sci 2018; 19:ijms19092748. [PMID: 30217050 PMCID: PMC6163538 DOI: 10.3390/ijms19092748] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 09/07/2018] [Accepted: 09/10/2018] [Indexed: 11/16/2022] Open
Abstract
Following herbivore attacks, plants modify a blend of volatiles organic compounds (VOCs) released, resulting in the attraction of their antagonists. However, volatiles released constitutively may affect herbivores and natural enemies' fitness too. In tomato there is still a lack of information on the genetic bases responsible for the constitutive release of VOC involved in direct and indirect defenses. Here we studied the constitutive emissions related to the two most abundant sesquiterpene synthase genes expressed in tomato and their functional role in plant defense. Using an RNA interference approach, we silenced the expression of TPS9 and TPS12 genes and assessed the effect of this transformation on herbivores and parasitoids. We found that silenced plants displayed a different constitutive volatiles emission from controls, resulting in reduced attractiveness for the aphid parasitoid Aphidius ervi and in an impaired development of Spodoptera exigua larvae. We discussed these data considering the transcriptional regulation of key-genes involved in the pathway of VOC metabolism. We provide several lines of evidence on the metabolic flux from terpenoids to phenylpropanoids. Our results shed more light on constitutive defenses mediated by plant volatiles and on the molecular mechanisms involved in their metabolic regulation.
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28
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Rodríguez A, Kava V, Latorre‐García L, da Silva GJ, Pereira RG, Glienke C, Ferreira‐Maba LS, Vicent A, Shimada T, Peña L. Engineering d-limonene synthase down-regulation in orange fruit induces resistance against the fungus Phyllosticta citricarpa through enhanced accumulation of monoterpene alcohols and activation of defence. MOLECULAR PLANT PATHOLOGY 2018; 19:2077-2093. [PMID: 29573543 PMCID: PMC6638045 DOI: 10.1111/mpp.12681] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 01/29/2018] [Accepted: 03/15/2018] [Indexed: 05/27/2023]
Abstract
Terpene volatiles play an important role in the interactions between specialized pathogens and fruits. Citrus black spot (CBS), caused by the fungus Phyllosticta citricarpa, is associated with crop losses in different citrus-growing areas worldwide. The pathogen may infect the fruit for 20-24 weeks after petal fall, but the typical hard spot symptoms appear when the fruit have almost reached maturity, caused by fungal colonization and the induction of cell lysis around essential oil cavities. d-Limonene represents approximately 95% of the total oil gland content in mature orange fruit. Herein, we investigated whether orange fruit with reduced d-limonene content in peel oil glands via an antisense (AS) approach may affect fruit interaction with P. citricarpa relative to empty vector (EV) controls. AS fruit showed enhanced resistance to the fungus relative to EV fruit. Because of the reduced d-limonene content, an over-accumulation of linalool and other monoterpene alcohols was found in AS relative to EV fruit. A global gene expression analysis at 2 h and 8 days after inoculation with P. citricarpa revealed the activation of defence responses in AS fruit via the up-regulation of different pathogenesis-related (PR) protein genes, probably as a result of enhanced constitutive accumulation of linalool and other alcohols. When assayed in vitro and in vivo, monoterpene alcohols at the concentrations present in AS fruit showed strong antifungal activity. We show here that terpene engineering in fruit peels could be a promising method for the development of new strategies to obtain resistance to fruit diseases.
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Affiliation(s)
- Ana Rodríguez
- Laboratório de Biotecnologia Vegetal, Fundo de Defesa da Citricultura (Fundecitrus)AraraquaraSão Paulo 14807–040Brazil
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas (IBMCP‐CSIC)Valencia 46022Spain
| | - Vanessa Kava
- Depto. de Genética, Universidade Federal do ParanáCuritibaParaná 81.531‐980Brazil
| | - Lorena Latorre‐García
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas (IBMCP‐CSIC)Valencia 46022Spain
| | - Geraldo J. da Silva
- Laboratório de Biotecnologia Vegetal, Fundo de Defesa da Citricultura (Fundecitrus)AraraquaraSão Paulo 14807–040Brazil
| | - Rosana G. Pereira
- Laboratório de Biotecnologia Vegetal, Fundo de Defesa da Citricultura (Fundecitrus)AraraquaraSão Paulo 14807–040Brazil
| | - Chirlei Glienke
- Depto. de Genética, Universidade Federal do ParanáCuritibaParaná 81.531‐980Brazil
| | | | - Antonio Vicent
- Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias (IVIA)Moncada, Valencia 46113Spain
| | - Takehiko Shimada
- National Institute of Fruit Tree Science (NIFTS), National Agriculture and Bio‐oriented Research Organization (NARO)Shizuoka, Shizuoka 424‐0292Japan
| | - Leandro Peña
- Laboratório de Biotecnologia Vegetal, Fundo de Defesa da Citricultura (Fundecitrus)AraraquaraSão Paulo 14807–040Brazil
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas (IBMCP‐CSIC)Valencia 46022Spain
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29
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Santamaria ME, Arnaiz A, Gonzalez-Melendi P, Martinez M, Diaz I. Plant Perception and Short-Term Responses to Phytophagous Insects and Mites. Int J Mol Sci 2018; 19:E1356. [PMID: 29751577 PMCID: PMC5983831 DOI: 10.3390/ijms19051356] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 04/19/2018] [Accepted: 04/25/2018] [Indexed: 12/03/2022] Open
Abstract
Plant⁻pest relationships involve complex processes encompassing a network of molecules, signals, and regulators for overcoming defenses they develop against each other. Phytophagous arthropods identify plants mainly as a source of food. In turn, plants develop a variety of strategies to avoid damage and survive. The success of plant defenses depends on rapid and specific recognition of the phytophagous threat. Subsequently, plants trigger a cascade of short-term responses that eventually result in the production of a wide range of compounds with defense properties. This review deals with the main features involved in the interaction between plants and phytophagous insects and acari, focusing on early responses from the plant side. A general landscape of the diverse strategies employed by plants within the first hours after pest perception to block the capability of phytophagous insects to develop mechanisms of resistance is presented, with the potential of providing alternatives for pest control.
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Affiliation(s)
- M Estrella Santamaria
- Centro de Biotecnologia y Genomica de Plantas, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Universidad Politecnica de Madrid (UPM), Pozuelo de Alarcon, 28223 Madrid, Spain.
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain.
| | - Ana Arnaiz
- Centro de Biotecnologia y Genomica de Plantas, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Universidad Politecnica de Madrid (UPM), Pozuelo de Alarcon, 28223 Madrid, Spain.
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain.
| | - Pablo Gonzalez-Melendi
- Centro de Biotecnologia y Genomica de Plantas, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Universidad Politecnica de Madrid (UPM), Pozuelo de Alarcon, 28223 Madrid, Spain.
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain.
| | - Manuel Martinez
- Centro de Biotecnologia y Genomica de Plantas, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Universidad Politecnica de Madrid (UPM), Pozuelo de Alarcon, 28223 Madrid, Spain.
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain.
| | - Isabel Diaz
- Centro de Biotecnologia y Genomica de Plantas, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Universidad Politecnica de Madrid (UPM), Pozuelo de Alarcon, 28223 Madrid, Spain.
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain.
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Su Q, Chen G, Mescher MC, Peng Z, Xie W, Wang S, Wu Q, Liu J, Li C, Wang W, Zhang Y. Whitefly aggregation on tomato is mediated by feeding‐induced changes in plant metabolites that influence the behaviour and performance of conspecifics. Funct Ecol 2018. [DOI: 10.1111/1365-2435.13055] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qi Su
- Institute of Insect SciencesCollege of AgricultureYangtze University Jingzhou Hubei China
- Institute of Vegetables and FlowersChinese Academy of Agricultural Sciences Beijing China
| | - Gong Chen
- Institute of Vegetables and FlowersChinese Academy of Agricultural Sciences Beijing China
- College of Plant ProtectionHunan Agricultural University Changsha Hunan China
| | - Mark C. Mescher
- Department of Environmental Systems ScienceETH Zürich Zürich Switzerland
| | - Zhengke Peng
- Institute of Vegetables and FlowersChinese Academy of Agricultural Sciences Beijing China
| | - Wen Xie
- Institute of Vegetables and FlowersChinese Academy of Agricultural Sciences Beijing China
| | - Shaoli Wang
- Institute of Vegetables and FlowersChinese Academy of Agricultural Sciences Beijing China
| | - Qingjun Wu
- Institute of Vegetables and FlowersChinese Academy of Agricultural Sciences Beijing China
| | - Jie Liu
- National Agro‐Technical, Extension and Service Centre Beijing China
| | - Chuanren Li
- Institute of Insect SciencesCollege of AgricultureYangtze University Jingzhou Hubei China
| | - Wenkai Wang
- Institute of Insect SciencesCollege of AgricultureYangtze University Jingzhou Hubei China
| | - Youjun Zhang
- Institute of Vegetables and FlowersChinese Academy of Agricultural Sciences Beijing China
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Chen G, Escobar-Bravo R, Kim HK, Leiss KA, Klinkhamer PGL. Induced Resistance Against Western Flower Thrips by the Pseudomonas syringae-Derived Defense Elicitors in Tomato. FRONTIERS IN PLANT SCIENCE 2018; 9:1417. [PMID: 30344528 PMCID: PMC6182256 DOI: 10.3389/fpls.2018.01417] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 09/06/2018] [Indexed: 05/04/2023]
Abstract
Western flower thrips (WFT) Frankliniella occidentalis (Pergande) is a key agricultural pest of cultivated tomatoes. Induced host plant resistance by activating jasmonic acid (JA) signaling pathway constitutes a promising method for WFT control. The phytotoxin coronatine (COR), produced by Pseudomonas syringae pv. tomato DC3000 (Pst), mimics the plant hormone JA-Isoleucine and can promote resistance against herbivorous arthropods. Here we determined the effect of Pst and COR on tomato resistance against WFT, induction of JA and salicylic acid (SA) associated defenses, and plant chemistry. Additionally, we investigated the presence of other components in Pst-derived and filtered culture medium, and their interactive effect with COR on tomato resistance to WFT. Our results showed that infiltration of COR or Pst reduced WFT feeding damage in tomato plants. COR and Pst induced the expression of JA-associated gene and protein marker. COR also induced expression of a SA-related responsive gene, although at much less magnitude. Activation of JA defenses in COR and Pst infiltrated plants did not affect density of type VI leaf trichomes, which are defenses reported to be induced by JA. An untargeted metabolomic analysis showed that both treatments induced strong changes in infiltrated leaves, but leaf responses to COR or Pst slightly differed. Application of the Pst-derived and filtered culture medium, containing COR but not viable Pst, also increased tomato resistance against WFT confirming that the induction of tomato defenses does not require a living Pst population to be present in the plant. Infiltration of tomato plants with low concentrations of COR in diluted Pst-derived and filtered culture medium reduced WFT feeding damage in a greater magnitude than infiltration with an equivalent amount of pure COR indicating that other elicitors are present in the medium. This was confirmed by the fact that the medium from a COR-mutant of Pst also strongly reduced silver damage. In conclusion, our results indicate that induction of JA defenses by COR, Pst infection, the medium of Pst and the medium of a Pst COR- mutant increased resistance against WFT. This was not mediated by the reinforcement of leaf trichome densities, but rather the induction of chemical defenses.
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Affiliation(s)
- Gang Chen
- Plant Science and Natural Products, Institute of Biology, Leiden University, Leiden, Netherlands
- *Correspondence: Gang Chen,
| | - Rocío Escobar-Bravo
- Plant Science and Natural Products, Institute of Biology, Leiden University, Leiden, Netherlands
| | - Hye Kyong Kim
- Plant Science and Natural Products, Institute of Biology, Leiden University, Leiden, Netherlands
| | - Kirsten A. Leiss
- Business Unit Horticulture, Wageningen University and Research Center, Bleiswijk, Netherlands
| | - Peter G. L. Klinkhamer
- Plant Science and Natural Products, Institute of Biology, Leiden University, Leiden, Netherlands
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32
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Buonanno M, Coppola M, Di Lelio I, Molisso D, Leone M, Pennacchio F, Langella E, Rao R, Monti SM. Prosystemin, a prohormone that modulates plant defense barriers, is an intrinsically disordered protein. Protein Sci 2017; 27:620-632. [PMID: 29168260 DOI: 10.1002/pro.3348] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 11/09/2017] [Accepted: 11/11/2017] [Indexed: 11/09/2022]
Abstract
Prosystemin, originally isolated from Lycopersicon esculentum, is a tomato pro-hormone of 200 aminoacid residues which releases a bioactive peptide of 18 aminoacids called Systemin. This signaling peptide is involved in the activation of defense genes in solanaceous plants in response to herbivore feeding damage. Using biochemical, biophysical and bioinformatics approaches we characterized Prosystemin, showing that it is an intrinsically disordered protein possessing a few secondary structure elements within the sequence. Plant treatment with recombinant Prosystemin promotes early and late plant defense genes, which limit the development and survival of Spodoptera littoralis larvae fed with treated plants.
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Affiliation(s)
| | - Mariangela Coppola
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Portici, NA, Italy
| | - Ilaria Di Lelio
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Portici, NA, Italy
| | - Donata Molisso
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Portici, NA, Italy
| | - Marilisa Leone
- Institute of Biostructures and Bioimaging, CNR, Naples, Italy
| | - Francesco Pennacchio
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Portici, NA, Italy
| | - Emma Langella
- Institute of Biostructures and Bioimaging, CNR, Naples, Italy
| | - Rosa Rao
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Portici, NA, Italy
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Kasal-Slavik T, Eschweiler J, Kleist E, Mumm R, Goldbach HE, Schouten A, Wildt J. Early biotic stress detection in tomato (Solanum lycopersicum) by BVOC emissions. PHYTOCHEMISTRY 2017; 144:180-188. [PMID: 28946050 DOI: 10.1016/j.phytochem.2017.09.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 09/07/2017] [Accepted: 09/08/2017] [Indexed: 06/07/2023]
Abstract
We investigated impacts of early and mild biotic stress on Biogenic Volatile Organic Compounds (BVOC) emissions from tomato in order to test their potential for early (biotic) stress detection. Tomato plants were exposed to two common fungal pathogens, Botrytis cinerea and Oidium neolycopesici and the sap-sucking aphid Myzus persicae. Furthermore, plants were exposed to methyl jasmonate (MeJA) in order to identify BVOC emissions related to activation of jasmonic acid (JA) signalling pathway. These emissions where then used as a reference for identifying active JA signalling pathway in plants at early stages of biotic stress. After infection by the necrotrophic fungus B. cinerea, changes in BVOC emissions indicated that tomato plants had predominantly activated the jasmonic acid (JA) signalling pathway. The plants were able to modify their defence pathways in order to overcome fungal infection. When tomato plants were infected with the biotrophic fungus O. neolycopersici, only minor changes in BVOC emissions were observed with additional emissions of the sesquiterpene α-copaene. α-copaene emissions allowed the identification of general biotic stress in the plants, without pinpointing the actual triggered defence pathway. BVOC emissions during M. persicae attack had changed before the occurrence of visual symptoms. Despite low infestation rates, plants emitted methyl salicylate indicating activation of the SA-mediated defence pathway.
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Affiliation(s)
- Tina Kasal-Slavik
- Department of Plant Nutrition, INRES, Universität Bonn, Karlrobert Kreiten Str. 13, 53115, Bonn, Germany; Institut für Bio- und Geowissenschaften, IBG-2, Forschungszentrum Jülich, 52425, Jülich, Germany.
| | - Julia Eschweiler
- Department of Molecular Phytomedicine, INRES, Universität Bonn, Karlrobert Kreiten Str. 13, 53115 Bonn, Germany
| | - Einhard Kleist
- Institut für Bio- und Geowissenschaften, IBG-2, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Roland Mumm
- Plant Research International, Wageningen University and Research Centre, 6700 AA, Wageningen, The Netherlands; Centre for BioSystems Genomics, 6700AB, Wageningen, The Netherlands
| | - Heiner E Goldbach
- Department of Plant Nutrition, INRES, Universität Bonn, Karlrobert Kreiten Str. 13, 53115, Bonn, Germany
| | - Alexander Schouten
- Laboratory of Nematology, Experimental Plant Sciences, Wageningen University and Research Centre, 6700 AA, Wageningen, The Netherlands
| | - Jürgen Wildt
- Institut für Bio- und Geowissenschaften, IBG-2, Forschungszentrum Jülich, 52425, Jülich, Germany
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34
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Silva DB, Bueno VHP, Van Loon JJA, Peñaflor MFGV, Bento JMS, Van Lenteren JC. Attraction of Three Mirid Predators to Tomato Infested by Both the Tomato Leaf Mining Moth Tuta absoluta and the Whitefly Bemisia tabaci. J Chem Ecol 2017; 44:29-39. [PMID: 29177897 DOI: 10.1007/s10886-017-0909-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 11/06/2017] [Accepted: 11/13/2017] [Indexed: 11/25/2022]
Abstract
Plants emit volatile compounds in response to insect herbivory, which may play multiple roles as defensive compounds and mediators of interactions with other plants, microorganisms and animals. Herbivore-induced plant volatiles (HIPVs) may act as indirect plant defenses by attracting natural enemies of the attacking herbivore. We report here the first evidence of the attraction of three Neotropical mirid predators (Macrolophus basicornis, Engytatus varians and Campyloneuropsis infumatus) toward plants emitting volatiles induced upon feeding by two tomato pests, the leaf miner Tuta absoluta and the phloem feeder Bemisia tabaci, in olfactometer bioassays. Subsequently, we compared the composition of volatile blends emitted by insect-infested tomato plants by collecting headspace samples and analyzing them with GC-FID and GC-MS. Egg deposition by T. absoluta did not make tomato plants more attractive to the mirid predators than uninfested tomato plants. Macrolophus basicornis is attracted to tomato plants infested with either T. absoluta larvae or by a mixture of B. tabaci eggs, nymphs and adults. Engytatus varians and C. infumatus responded to volatile blends released by tomato plants infested with T. absoluta larvae over uninfested plants. Also, multiple herbivory by T. absoluta and B. tabaci did not increase the attraction of the mirids compared to infestation with T. absoluta alone. Terpenoids represented the most important class of compounds in the volatile blends and there were significant differences between the volatile blends emitted by tomato plants in response to attack by T. absoluta, B. tabaci, or by both insects. We, therefore, conclude that all three mirids use tomato plant volatiles to find T. absoluta larvae. Multiple herbivory did neither increase, nor decrease attraction of C. infumatus, E. varians and M. basicornis. By breeding for higher rates of emission of selected terpenes, increased attractiveness of tomato plants to natural enemies may improve the effectiveness of biological control.
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Affiliation(s)
- Diego B Silva
- Department of Entomology, Federal University of Lavras (UFLA), P.O.Box 3037, Lavras, MG, 37200-000, Brazil
- Luiz de Queiroz College of Agriculture (USP/ESALQ), Department of Entomology and Acarology, University of Sao Paulo, P.O. Box 9, Piracicaba, SP, 13418-900, Brazil
| | - Vanda H P Bueno
- Department of Entomology, Federal University of Lavras (UFLA), P.O.Box 3037, Lavras, MG, 37200-000, Brazil.
- Luiz de Queiroz College of Agriculture (USP/ESALQ), Department of Entomology and Acarology, University of Sao Paulo, P.O. Box 9, Piracicaba, SP, 13418-900, Brazil.
| | - Joop J A Van Loon
- Laboratory of Entomology, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, The Netherlands
| | - Maria Fernanda G V Peñaflor
- Department of Entomology, Federal University of Lavras (UFLA), P.O.Box 3037, Lavras, MG, 37200-000, Brazil
- Luiz de Queiroz College of Agriculture (USP/ESALQ), Department of Entomology and Acarology, University of Sao Paulo, P.O. Box 9, Piracicaba, SP, 13418-900, Brazil
| | - José Maurício S Bento
- Luiz de Queiroz College of Agriculture (USP/ESALQ), Department of Entomology and Acarology, University of Sao Paulo, P.O. Box 9, Piracicaba, SP, 13418-900, Brazil
| | - Joop C Van Lenteren
- Luiz de Queiroz College of Agriculture (USP/ESALQ), Department of Entomology and Acarology, University of Sao Paulo, P.O. Box 9, Piracicaba, SP, 13418-900, Brazil
- Laboratory of Entomology, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, The Netherlands
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35
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Coppola M, Cascone P, Madonna V, Di Lelio I, Esposito F, Avitabile C, Romanelli A, Guerrieri E, Vitiello A, Pennacchio F, Rao R, Corrado G. Plant-to-plant communication triggered by systemin primes anti-herbivore resistance in tomato. Sci Rep 2017; 7:15522. [PMID: 29138416 PMCID: PMC5686165 DOI: 10.1038/s41598-017-15481-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 10/27/2017] [Indexed: 11/09/2022] Open
Abstract
Plants actively respond to herbivory by inducing various defense mechanisms in both damaged (locally) and non-damaged tissues (systemically). In addition, it is currently widely accepted that plant-to-plant communication allows specific neighbors to be warned of likely incoming stress (defense priming). Systemin is a plant peptide hormone promoting the systemic response to herbivory in tomato. This 18-aa peptide is also able to induce the release of bioactive Volatile Organic Compounds, thus also promoting the interaction between the tomato and the third trophic level (e.g. predators and parasitoids of insect pests). In this work, using a combination of gene expression (RNA-Seq and qRT-PCR), behavioral and chemical approaches, we demonstrate that systemin triggers metabolic changes of the plant that are capable of inducing a primed state in neighboring unchallenged plants. At the molecular level, the primed state is mainly associated with an elevated transcription of pattern -recognition receptors, signaling enzymes and transcription factors. Compared to naïve plants, systemin-primed plants were significantly more resistant to herbivorous pests, more attractive to parasitoids and showed an increased response to wounding. Small peptides are nowadays considered fundamental signaling molecules in many plant processes and this work extends the range of downstream effects of this class of molecules to intraspecific plant-to-plant communication.
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Affiliation(s)
- Mariangela Coppola
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055, Portici, NA, Italy
| | - Pasquale Cascone
- Istituto per la Protezione Sostenibile delle Piante, CNR, Via Università 133, Portici, NA, Italy
| | - Valentina Madonna
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055, Portici, NA, Italy
| | - Ilaria Di Lelio
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055, Portici, NA, Italy
| | - Francesco Esposito
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055, Portici, NA, Italy
| | - Concetta Avitabile
- Istituto di Biostrutture e Bioimmagini (CNR), via Mezzocannone 16, 80134, Napoli, Italy
| | - Alessandra Romanelli
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via Domenico Montesano, 49, 80131, Napoli, NA, Italy
| | - Emilio Guerrieri
- Istituto per la Protezione Sostenibile delle Piante, CNR, Via Università 133, Portici, NA, Italy
| | - Alessia Vitiello
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055, Portici, NA, Italy
| | - Francesco Pennacchio
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055, Portici, NA, Italy
| | - Rosa Rao
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055, Portici, NA, Italy.
| | - Giandomenico Corrado
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Via Università 100, 80055, Portici, NA, Italy.
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36
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Gust AA, Pruitt R, Nürnberger T. Sensing Danger: Key to Activating Plant Immunity. TRENDS IN PLANT SCIENCE 2017; 22:779-791. [PMID: 28779900 DOI: 10.1016/j.tplants.2017.07.005] [Citation(s) in RCA: 184] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 07/06/2017] [Accepted: 07/11/2017] [Indexed: 05/20/2023]
Abstract
In both plants and animals, defense against pathogens relies on a complex surveillance system for signs of danger. Danger signals may originate from the infectious agent or from the host itself. Immunogenic plant host factors can be roughly divided into two categories: molecules which are passively released upon cell damage ('classical' damage-associated molecular patterns, DAMPs), and peptides which are processed and/or secreted upon infection to modulate the immune response (phytocytokines). We highlight the ongoing challenge to understand how plants sense various danger signals and integrate this information to produce an appropriate immune response to diverse challenges.
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Affiliation(s)
- Andrea A Gust
- Department of Plant Biochemistry, Center of Plant Molecular Biology (ZMBP), University of Tübingen, 72076 Tübingen, Germany.
| | - Rory Pruitt
- Department of Plant Biochemistry, Center of Plant Molecular Biology (ZMBP), University of Tübingen, 72076 Tübingen, Germany
| | - Thorsten Nürnberger
- Department of Plant Biochemistry, Center of Plant Molecular Biology (ZMBP), University of Tübingen, 72076 Tübingen, Germany.
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37
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Rowen E, Gutensohn M, Dudareva N, Kaplan I. Carnivore Attractant or Plant Elicitor? Multifunctional Roles of Methyl Salicylate Lures in Tomato Defense. J Chem Ecol 2017; 43:573-585. [PMID: 28600687 DOI: 10.1007/s10886-017-0856-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 05/28/2017] [Accepted: 05/30/2017] [Indexed: 01/07/2023]
Abstract
Synthetic plant volatile lures attract natural enemies, but may have non-target effects due to the multifunctional nature of volatile signals. For example, methyl salicylate (MeSA) is used to attract predators, yet also serves as a signaling hormone involved in plant pathogen defense. We investigated the consequences of deploying MeSA lures to attract predators for tomato (Solanum lycopersicum) defense against herbivores. To understand the spatial distribution of the lure's effect, we exposed tomatoes in the field to MeSA along a linear distance gradient and induced defenses by simulating feeding by hornworm caterpillars in a fully crossed factorial design (+/- MeSA, +/- herbivory). Subsequently, we analyzed activity of several defensive proteins (protease inhibitors, polyphenol oxidase, peroxidase), development of hornworm larvae (Manduca sexta), growth of fungal pathogens (Cladosporium and Alternaria), and attractiveness to herbivores and predators. Overall, MeSA-exposed plants were more resistant to both insects and pathogens. Secondary pathogen infection was reduced by 25% in MeSA exposed plants, possibly due to elevated polyphenol oxidase activity. Interestingly, we found that lures affected plant pathogen defenses equivalently across all distances (up to 4 m away) indicating that horizontal diffusion of a synthetic volatile may be greater than previously assumed. While thrips avoided colonizing hornworm- damaged tomato plants, this induced resistance was not observed upon pre-exposure to MeSA, suggesting that MeSA suppresses the repellant effect induced by herbivory. Thus, using MeSA lures in biological control may inadvertently protect crops from pathogens, but has mixed effects on plant resistance to insect herbivores.
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Affiliation(s)
- Elizabeth Rowen
- Department of Entomology, Pennsylvania State University, University Park, PA, 16802, USA.
| | - Michael Gutensohn
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV, 26505, USA
| | - Natalia Dudareva
- Department of Biochemistry, Whistler Hall, Purdue University, West Lafayette, IN, 47907, USA
| | - Ian Kaplan
- Department of Entomology, Smith Hall, Purdue University, West Lafayette, IN, 47907, USA
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38
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Silva DB, Weldegergis BT, Van Loon JJA, Bueno VHP. Qualitative and Quantitative Differences in Herbivore-Induced Plant Volatile Blends from Tomato Plants Infested by Either Tuta absoluta or Bemisia tabaci. J Chem Ecol 2017; 43:53-65. [PMID: 28050733 PMCID: PMC5331093 DOI: 10.1007/s10886-016-0807-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Revised: 11/23/2016] [Accepted: 12/11/2016] [Indexed: 11/24/2022]
Abstract
Plants release a variety of volatile organic compounds that play multiple roles in the interactions with other plants and animals. Natural enemies of plant-feeding insects use these volatiles as cues to find their prey or host. Here, we report differences between the volatile blends of tomato plants infested with the whitefly Bemisia tabaci or the tomato borer Tuta absoluta. We compared the volatile emission of: (1) clean tomato plants; (2) tomato plants infested with T. absoluta larvae; and (3) tomato plants infested with B. tabaci adults, nymphs, and eggs. A total of 80 volatiles were recorded of which 10 occurred consistently only in the headspace of T. absoluta-infested plants. Many of the compounds detected in the headspace of the two herbivory treatments were emitted at different rates. Plants damaged by T. absoluta emitted at least 10 times higher levels of many compounds compared to plants damaged by B. tabaci and intact plants. The multivariate separation of T. absoluta-infested plants from those infested with B. tabaci was due largely to the chorismate-derived compounds as well as volatile metabolites of C18-fatty acids and branched chain amino acids that had higher emission rates from T. absoluta-infested plants, whereas the cyclic sesquiterpenes α- and β-copaene, valencene, and aristolochene were emitted at significantly higher levels from B. tabaci-infested plants. Our findings imply that feeding by T. absoluta and B. tabaci induced emission of volatile blends that differ quantitatively and qualitatively, providing a chemical basis for the recently documented behavioral discrimination by two generalist predatory mirid species, natural enemies of T. absoluta and B. tabaci employed in biological control.
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Affiliation(s)
- Diego B Silva
- Laboratory of Biological Control, Department of Entomology, Federal University of Lavras, P.O.Box 3037, Lavras/MG, 37200-000, Brazil.,Laboratory of Entomology, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, The Netherlands
| | - Berhane T Weldegergis
- Laboratory of Entomology, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, The Netherlands.
| | - Joop J A Van Loon
- Laboratory of Entomology, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, The Netherlands
| | - Vanda H P Bueno
- Laboratory of Biological Control, Department of Entomology, Federal University of Lavras, P.O.Box 3037, Lavras/MG, 37200-000, Brazil.
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39
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Cui H, Wei J, Su J, Li C, Ge F. Elevated O 3 increases volatile organic compounds via jasmonic acid pathway that promote the preference of parasitoid Encarsia formosa for tomato plants. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2016; 253:243-250. [PMID: 27968993 DOI: 10.1016/j.plantsci.2016.09.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 09/18/2016] [Accepted: 09/29/2016] [Indexed: 06/06/2023]
Abstract
The elevated atmospheric O3 level may change the interactions of plants and insects, which potentially affects direct and indirect plant defences. However, the underlying mechanism of the impact of elevated O3 on indirect plant defence, namely the efficacy of natural enemies, is unclear. Here we tested a hypothesis that linked the effects of elevated O3 and whitefly herbivory on tomato volatile releases mediated by the jasmonic acid (JA) pathway with the preferences of parasitoid Encarsia formosa for two different tomato genotypes (wild-type (Wt) and JA-deficient genotype (spr2)). The O3 and whitefly herbivory significantly increased the production of volatile organic compounds (VOCs), including monoterpenes and green leaf volatiles (GLVs). The Wt plants released higher volatile levels, particularly monoterpenes, than did the spr2 plants. In Y-tube tests, limonene and Z-3-hexanol played key roles in the attraction of E. formosa. Moreover, regardless of plant genotype, the two plant genotypes were preferred by adult E. formosa under the O3 and O3+ herbivory treatments. Our results suggest that under elevated O3, the activation of the JA pathway significantly up-regulates the emission rates of volatiles, through which the efficacy of natural enemy might be promoted.
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Affiliation(s)
- Hongying Cui
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China; Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Jianing Wei
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Jianwei Su
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Chuanyou Li
- State Key Laboratory of Plant Genomics, National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Feng Ge
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China.
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Chen C, Zhang Y, Qiakefu K, Zhang X, Han LM, Hua WP, Yan YP, Wang ZZ. Overexpression of Tomato Prosystemin (LePS) Enhances Pest Resistance and the Production of Tanshinones in Salvia miltiorrhiza Bunge. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:7760-7769. [PMID: 27690419 DOI: 10.1021/acs.jafc.6b02844] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Tanshinones are a group of active diterpenes with pharmacological properties that are widely used in the treatment of cardiovascular diseases. Jasmonate (JA) acts as an elicitor to enhance tanshinone biosynthesis in Salvia miltiorrhiza. However, because of high labor costs and undesirable chemical characteristics, the use of JA elicitation is still in the experimental stage. In our experiments, the overexpression of Lycopersicon esculentum (tomato) Prosystemin (LePS) in transgenic plants of S. miltiorrhiza increased their JA concentrations, significantly enhanced the production of tanshinone, and activated the expression of key genes in the tanshinone biosynthesis pathway. Meanwhile, the relative levels of metabolites related to defense such as sterols, terpenes, and phenolic acids were also increased in our OEP lines. In addition, when the larvae of cotton bollworms (Heliothis armigera) were fed with leaves from transgenic lines, their mortality rates rose by nearly 4-fold when compared to that of larvae exposed to leaves from the nontransformed wild type. Our study provides a new strategy for genetic engineering by which tanshinone production and pest resistance can be improved in S. miltiorrhiza. This is accomplished by simulating the wounding signal that increases the endogenous levels of JA.
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Affiliation(s)
- Chen Chen
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , 710119, Xi'an, P. R. China
| | - Yuan Zhang
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , 710119, Xi'an, P. R. China
| | - Kuliman Qiakefu
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , 710119, Xi'an, P. R. China
| | - Xuan Zhang
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , 710119, Xi'an, P. R. China
| | - Li-Min Han
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , 710119, Xi'an, P. R. China
- College of Life Science and Food Engineering, Shaanxi Xueqian Normal University , 710110, Xi'an, P. R. China
| | - Wen-Ping Hua
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , 710119, Xi'an, P. R. China
- College of Life Science and Food Engineering, Shaanxi Xueqian Normal University , 710110, Xi'an, P. R. China
| | - Ya-Ping Yan
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , 710119, Xi'an, P. R. China
| | - Zhe-Zhi Wang
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , 710119, Xi'an, P. R. China
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Catola S, Kaidala Ganesha SD, Calamai L, Loreto F, Ranieri A, Centritto M. Headspace-Solid Phase Microextraction Approach for Dimethylsulfoniopropionate Quantification in Solanum lycopersicum Plants Subjected to Water Stress. FRONTIERS IN PLANT SCIENCE 2016; 7:1257. [PMID: 27602039 PMCID: PMC4993785 DOI: 10.3389/fpls.2016.01257] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 08/08/2016] [Indexed: 05/27/2023]
Abstract
Dimethylsulfoniopropionate (DMSP) and dimethyl sulphide (DMS) are compounds found mainly in marine phytoplankton and in some halophytic plants. DMS is a globally important biogenic volatile in regulating of global sulfur cycle and planetary albedo, whereas DMSP is involved in the maintenance of plant-environment homeostasis. Plants emit minute amounts of DMS compared to marine phytoplankton and there is a need for hypersensitive analytic techniques to enable its quantification in plants. Solid Phase Micro Extraction from Head Space (HS-SPME) is a simple, rapid, solvent-free and cost-effective extraction mode, which can be easily hyphenated with GC-MS for the analysis of volatile organic compounds. Using tomato (Solanum lycopersicum) plants subjected to water stress as a model system, we standardized a sensitive and accurate protocol for detecting and quantifying DMSP pool sizes, and potential DMS emissions, in cryoextracted leaves. The method relies on the determination of DMS free and from DMSP pools before and after the alkaline hydrolysis via Headspace-Solid Phase Micro Extraction-Gas Chromatography-Mass Spectrometry (HS-SPME-GC-MS). We found a significant (2.5 time) increase of DMSP content in water-stressed leaves reflecting clear stress to the photosynthetic apparatus. We hypothesize that increased DMSP, and in turn DMS, in water-stressed leaves are produced by carbon sources other than direct photosynthesis, and function to protect plants either osmotically or as antioxidants. Finally, our results suggest that SPME is a powerful and suitable technique for the detection and quantification of biogenic gasses in trace amounts.
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Affiliation(s)
- Stefano Catola
- Trees and Timber Institute, National Research Council of ItalySesto Fiorentino, Italy
- Department of Agriculture, Food and Environment, University of PisaPisa, Italy
| | - Srikanta Dani Kaidala Ganesha
- Institute of Ecosystem Study, National Research Council of ItalySesto Fiorentino, Italy
- School of Biology, Indian Institute of Science Education and ResearchThiruvananthapuram, India
| | - Luca Calamai
- Department of Agriculture, Food and Environmental Science, University of FlorenceFlorence, Italy
| | - Francesco Loreto
- Department of Biology, Agriculture and Food Sciences, National Research Council of ItalyRoma, Italy
| | - Annamaria Ranieri
- Department of Agriculture, Food and Environment, University of PisaPisa, Italy
| | - Mauro Centritto
- Trees and Timber Institute, National Research Council of ItalySesto Fiorentino, Italy
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Li YC, Wan WL, Lin JS, Kuo YW, King YC, Chen YC, Jeng ST. Signal transduction and regulation of IbpreproHypSys in sweet potato. PLANT, CELL & ENVIRONMENT 2016; 39:1576-87. [PMID: 26924170 DOI: 10.1111/pce.12729] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 02/04/2016] [Accepted: 02/09/2016] [Indexed: 05/28/2023]
Abstract
Hydroxyproline-rich glycopeptides (HypSys) are small signalling peptides containing 18-20 amino acids. The expression of IbpreproHypSys, encoding the precursor of IbHypSys, was induced in sweet potato (Ipomoea batatas cv. Tainung 57) through wounding and IbHypSys treatments by using jasmonate and H2 O2 . Transgenic sweet potatoes overexpressing (OE) and silencing [RNA interference (RNAi)] IbpreproHypSys were created. The expression of the wound-inducible gene for ipomoelin (IPO) in the local and systemic leaves of OE plants was stronger than the expression in wild-type (WT) and RNAi plants after wounding. Furthermore, grafting experiments indicated that IPO expression was considerably higher in WT stocks receiving wounding signals from OE than from RNAi scions. However, wounding WT scions highly induced IPO expression in OE stocks. These results indicated that IbpreproHypSys expression contributed towards sending and receiving the systemic signals that induced IPO expression. Analysing the genes involved in the phenylpropanoid pathway demonstrated that lignin biosynthesis was activated after synthetic IbHypSys treatment. IbpreproHypSys expression in sweet potato suppressed Spodoptera litura growth. In conclusion, wounding induced the expression of IbpreproHypSys, whose protein product was processed into IbHypSys. IbHypSys stimulated IbpreproHypSys and IPO expression and enhanced lignin biosynthesis, thus protecting plants from insects.
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Affiliation(s)
- Yu-Chi Li
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, 10617, Taiwan
| | - Wei-Lin Wan
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, 10617, Taiwan
- Department of Plant Biochemistry, Center for Plant Molecular Biology, University of Tuebingen, Tuebingen, 72076, Germany
| | - Jeng-Shane Lin
- Department of Life Sciences, National Chung Hsing University, Taichung, 40227, Taiwan
| | - Yun-Wei Kuo
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, 10617, Taiwan
| | - Yu-Chi King
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, 10617, Taiwan
| | - Yu-Chi Chen
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, 82444, Taiwan
| | - Shih-Tong Jeng
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, 10617, Taiwan
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Shi X, Chen G, Tian L, Peng Z, Xie W, Wu Q, Wang S, Zhou X, Zhang Y. The Salicylic Acid-Mediated Release of Plant Volatiles Affects the Host Choice of Bemisia tabaci. Int J Mol Sci 2016; 17:E1048. [PMID: 27376280 PMCID: PMC4964424 DOI: 10.3390/ijms17071048] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 05/29/2016] [Accepted: 06/23/2016] [Indexed: 11/17/2022] Open
Abstract
The whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) causes serious crop losses worldwide by transmitting viruses. We have previously shown that salicylic acid (SA)-related plant defenses directly affect whiteflies. In this study, we applied exogenous SA to tomato plants in order to investigate the interaction between SA-induced plant volatiles and nonviruliferous B. tabaci B and Q or B- and Q-carrying tomato yellow leaf curl virus (TYLCV). The results showed that exogenous SA caused plants to repel nonviruliferous whiteflies, but the effect was reduced when the SA concentration was low and when the whiteflies were viruliferous. Exogenous SA increased the number and quantity of plant volatiles-especially the quantity of methyl salicylate and δ-limonene. In Y-tube olfactometer assays, methyl salicylate and δ-limonene repelled the whiteflies, but the repellency was reduced for viruliferous Q. We suggest that the release of plant volatiles as mediated by SA affects the interaction between whiteflies, plants, and viruses. Further studies are needed to determine why viruliferous Q is less sensitive than nonviruliferous Q to repellent plant volatiles.
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Affiliation(s)
- Xiaobin Shi
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
- Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China.
| | - Gong Chen
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Lixia Tian
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Zhengke Peng
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Wen Xie
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Qingjun Wu
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Shaoli Wang
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Xuguo Zhou
- Department of Entomology, University of Kentucky, Lexington, KY 40546, USA.
| | - Youjun Zhang
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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Carrillo-Perdomo E, Jiménez-Arias D, Aller Á, Borges AA. Menadione Sodium Bisulphite (MSB) enhances the resistance response of tomato, leading to repel mollusc pests. PEST MANAGEMENT SCIENCE 2016; 72:950-960. [PMID: 26155989 DOI: 10.1002/ps.4074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 06/04/2015] [Accepted: 07/03/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Snails and slugs are terrestrial gastropods representing an important biotic stress that adversely affects crop yields. These pests are typically controlled with molluscicides, which produce pollution and toxicity and further induce the evolution of resistance mechanisms, making pest management even more challenging. In our work, we have assessed the efficacy of two different plant defence activators, menadione sodium bisulphite (MSB) and 1,2,3-benzothiadiazole-7-thiocarboxylic acid S-methyl ester (BTH), as inducers of resistance mechanisms of the model plant for defence, Solanum lycopersicum, against the generalist mollusc Theba grasseti (Helicidae). The study was designed to test the feeding behaviour and choice of snails, and also to analyse the expression profile of different genes specifically involved in defence against herbivores and wounds. RESULTS Our data suggest that, through the downregulation of the terpene volatile genes and the production of proteinase inhibitors, treated MSB plants may be less apparent to herbivores that use herbivore-induced plant volatiles for host location. By contrast, BTH was not effective in the treatment of the pest, probably owing to an antagonistic effect derived from the induction of both salicylic-acid-dependent and jasmonic-acid-dependent pathways. CONCLUSIONS This information is crucial to determine the genetic basis of the choice of terrestrial gastropod herbivores in tomato, providing valuable insight into how the plant defence activators could control herbivore pests in plants. Our work not only reports for the first time the interaction between tomato and a mollusc pest but also presents the action of two plant defence inductors that seems to produce opposed responses by inducing resistance mechanisms through different defence pathways.
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Affiliation(s)
- Estefanía Carrillo-Perdomo
- Instituto de Productos Naturales y Agrobiología-CSIC, La Laguna, Tenerife, Canary Islands, Spain
- Universidad Nacional de Chimborazo (UNACH), Faculty of Engineering, Agroindustrial Engineering, Riobamba, Chimborazo, Ecuador
| | - David Jiménez-Arias
- Instituto de Productos Naturales y Agrobiología-CSIC, La Laguna, Tenerife, Canary Islands, Spain
| | - Ángel Aller
- Instituto de Productos Naturales y Agrobiología-CSIC, La Laguna, Tenerife, Canary Islands, Spain
- Universidad Nacional de Chimborazo (UNACH), Faculty of Engineering, Agroindustrial Engineering, Riobamba, Chimborazo, Ecuador
| | - Andrés A Borges
- Instituto de Productos Naturales y Agrobiología-CSIC, La Laguna, Tenerife, Canary Islands, Spain
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Zebelo S, Song Y, Kloepper JW, Fadamiro H. Rhizobacteria activates (+)-δ-cadinene synthase genes and induces systemic resistance in cotton against beet armyworm (Spodoptera exigua). PLANT, CELL & ENVIRONMENT 2016; 39:935-43. [PMID: 26715260 DOI: 10.1111/pce.12704] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 12/14/2015] [Accepted: 12/18/2015] [Indexed: 05/18/2023]
Abstract
Gossypol is an important allelochemical produced by the subepidermal glands of some cotton varieties and important for their ability to respond to changing biotic stress by exhibiting antibiosis against some cotton pests. Plant growth-promoting rhizobacteria (PGPR) are root-colonizing bacteria that increase plant growth and often elicit defence against plant pathogens and insect pests. Little is known about the effect of PGPR on cotton plant-insect interactions and the potential biochemical and molecular mechanisms by which PGPR enhance cotton plant defence. Here, we report that PGPR (Bacillus spp.) treated cotton plants showed significantly higher levels of gossypol compared with untreated plants. Similarly, the transcript levels of the genes (i.e. (+)-δ-cadinene synthase gene family) involved in the biosynthesis of gossypol were higher in PGPR-treated plants than in untreated plants. Furthermore, the levels of jasmonic acid, an octadecanoid-derived defence-related phytohormone and the transcript level of jasmonic acid responsive genes were higher in PGPR-treated plants than in untreated plants. Most intriguingly, Spodoptera exigua showed reduced larval feeding and development on PGPR-treated plants. These findings demonstrate that treatment of plants with rhizobacteria may induce significant biochemical and molecular changes with potential ramifications for plant-insect interactions.
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Affiliation(s)
- Simon Zebelo
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, 36849, USA
- Department of Natural Sciences, University of Maryland Eastern Shore, Princess Anne, MD, 21853, USA
| | - Yuanyuan Song
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, 36849, USA
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Joseph W Kloepper
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, 36849, USA
| | - Henry Fadamiro
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, 36849, USA
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Elicitation, an Effective Strategy for the Biotechnological Production of Bioactive High-Added Value Compounds in Plant Cell Factories. Molecules 2016; 21:182. [PMID: 26848649 PMCID: PMC6273650 DOI: 10.3390/molecules21020182] [Citation(s) in RCA: 193] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 01/26/2016] [Accepted: 01/28/2016] [Indexed: 12/04/2022] Open
Abstract
Plant in vitro cultures represent an attractive and cost-effective alternative to classical approaches to plant secondary metabolite (PSM) production (the “Plant Cell Factory” concept). Among other advantages, they constitute the only sustainable and eco-friendly system to obtain complex chemical structures biosynthesized by rare or endangered plant species that resist domestication. For successful results, the biotechnological production of PSM requires an optimized system, for which elicitation has proved one of the most effective strategies. In plant cell cultures, an elicitor can be defined as a compound introduced in small concentrations to a living system to promote the biosynthesis of the target metabolite. Traditionally, elicitors have been classified in two types, abiotic or biotic, according to their chemical nature and exogenous or endogenous origin, and notably include yeast extract, methyl jasmonate, salicylic acid, vanadyl sulphate and chitosan. In this review, we summarize the enhancing effects of elicitors on the production of high-added value plant compounds such as taxanes, ginsenosides, aryltetralin lignans and other types of polyphenols, focusing particularly on the use of a new generation of elicitors such as coronatine and cyclodextrins.
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Coppola M, Corrado G, Coppola V, Cascone P, Martinelli R, Digilio MC, Pennacchio F, Rao R. Prosystemin Overexpression in Tomato Enhances Resistance to Different Biotic Stresses by Activating Genes of Multiple Signaling Pathways. PLANT MOLECULAR BIOLOGY REPORTER 2015; 33:1270-1285. [PMID: 26339120 PMCID: PMC4551541 DOI: 10.1007/s11105-014-0834-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Systemin is a signal peptide that promotes the response to wounding and herbivore attack in tomato. This 18-amino acid peptide is released from a larger precursor, prosystemin. To study the role of systemin as a modulator of defense signaling, we generated tomato (Solanum lycopersicum) transgenic plants that overexpress the prosystemin cDNA. We carried out a transcriptomic analysis comparing two different transgenic events with the untransformed control. The Gene Ontology categories of the 503 differentially expressed genes indicated that several biological functions were affected. Systemin promotes the expression of an array of defense genes that are dependent on different signaling pathways and it downregulates genes connected with carbon fixation and carbohydrate metabolism. These alterations present a degree of overlap with the response programs that are classically associated to pathogen defense or abiotic stress protection, implying that end products of the systemin signaling pathway may be more diverse than expected. We show also that the observed transcriptional modifications have a relevant functional outcome, since transgenic lines were more resistant against very different biotic stressors such as aphids (Macrosiphum euphorbiae), phytopathogenic fungi (Botrytis cinerea and Alternaria alternata) and phytophagous larvae (Spodoptera littoralis). Our work demonstrated that in tomato the modulation of a single gene is sufficient to provide a wide resistance against stress by boosting endogenous defense pathways. Overall, the data provided evidence that the systemin peptide might serve as DAMP signal in tomato, acting as a broad indicator of tissue integrity.
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Affiliation(s)
- Mariangela Coppola
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, 80055 Portici, NA Italy
| | - Giandomenico Corrado
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, 80055 Portici, NA Italy
| | - Valentina Coppola
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, 80055 Portici, NA Italy
| | | | | | - Maria Cristina Digilio
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, 80055 Portici, NA Italy
| | - Francesco Pennacchio
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, 80055 Portici, NA Italy
| | - Rosa Rao
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, 80055 Portici, NA Italy
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Klauser D, Desurmont GA, Glauser G, Vallat A, Flury P, Boller T, Turlings TCJ, Bartels S. The Arabidopsis Pep-PEPR system is induced by herbivore feeding and contributes to JA-mediated plant defence against herbivory. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:5327-36. [PMID: 26034129 PMCID: PMC4526914 DOI: 10.1093/jxb/erv250] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A number of plant endogenous elicitors have been identified that induce pattern-triggered immunity upon perception. In Arabidopsis thaliana eight small precursor proteins, called PROPEPs, are thought to be cleaved upon danger to release eight peptides known as the plant elicitor peptides Peps. As the expression of some PROPEPs is induced upon biotic stress and perception of any of the eight Peps triggers a defence response, they are regarded as amplifiers of immunity. Besides the induction of defences directed against microbial colonization Peps have also been connected with herbivore deterrence as they share certain similarities to systemins, known mediators of defence signalling against herbivores in solanaceous plants, and they positively interact with the phytohormone jasmonic acid. A recent study using maize indicated that the application of ZmPep3, a maize AtPep-orthologue, elicits anti-herbivore responses. However, as this study only assessed the responses triggered by the exogenous application of Peps, the biological significance of these findings remained open. By using Arabidopsis GUS-reporter lines, it is now shown that the promoters of both Pep-receptors, PEPR1 and PEPR2, as well as PROPEP3 are strongly activated upon herbivore attack. Moreover, pepr1 pepr2 double mutant plants, which are insensitive to Peps, display a reduced resistance to feeding Spodoptera littoralis larvae and a reduced accumulation of jasmonic acid upon exposure to herbivore oral secretions. Taken together, these lines of evidence extend the role of the AtPep-PEPR system as a danger detection mechanism from microbial pathogens to herbivores and further underline its strong interaction with jasmonic acid signalling.
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Affiliation(s)
- Dominik Klauser
- Zürich-Basel Plant Science Center, University of Basel, Department of Environmental Sciences, Botany, Hebelstrasse 1, CH-4056 Basel, Switzerland
| | - Gaylord A Desurmont
- Université de Neuchâtel, Institute of Biology, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland
| | - Gaétan Glauser
- Université de Neuchâtel, Institute of Biology, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland
| | - Armelle Vallat
- Université de Neuchâtel, Institute of Biology, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland
| | - Pascale Flury
- Zürich-Basel Plant Science Center, University of Basel, Department of Environmental Sciences, Botany, Hebelstrasse 1, CH-4056 Basel, Switzerland
| | - Thomas Boller
- Zürich-Basel Plant Science Center, University of Basel, Department of Environmental Sciences, Botany, Hebelstrasse 1, CH-4056 Basel, Switzerland
| | - Ted C J Turlings
- Université de Neuchâtel, Institute of Biology, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland
| | - Sebastian Bartels
- Zürich-Basel Plant Science Center, University of Basel, Department of Environmental Sciences, Botany, Hebelstrasse 1, CH-4056 Basel, Switzerland
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49
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Baldassarre V, Cabassi G, Spadafora ND, Aprile A, Müller CT, Rogers HJ, Ferrante A. Wounding tomato fruit elicits ripening-stage specific changes in gene expression and production of volatile compounds. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:1511-26. [PMID: 25614658 PMCID: PMC4339607 DOI: 10.1093/jxb/eru516] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Fleshy fruits develop from an unripe organ that needs to be protected from damage to a ripe organ that attracts frugivores for seed dispersal through production of volatile organic compounds (VOCs). Thus, different responses to wounding damage are predicted. The aim of this study was to discover whether wound-induced changes in the transcriptome and VOC production alter as tomato transitions from unripe to ripe. Transcript changes were analysed 3h post-wounding using microarray analysis in two commercial salad-tomato (Solanum lycopersicum L.) cultivars: Luna Rossa and AVG, chosen for their high aroma production. This was followed by quantitative PCR on Luna Rossa genes involved in VOC biosynthesis and defence responses. VOCs elicited by wounding at different ripening stages were analysed by solid phase micro extraction and gas chromatography-mass spectrometry. Approximately 4000 differentially expressed genes were identified in the cultivar AVG and 2500 in Luna Rossa. In both cultivars the majority of genes were up-regulated and the most affected pathways were metabolism of terpenes, carotenoids, and lipids. Defence-related genes were mostly up-regulated in immature stages of development, whereas expression of genes related to VOCs changed at riper stages. More than 40 VOCs were detected and profiles changed with ripening stage. Thus, both transcriptome and VOC profiles elicited by wounding depend on stage of ripening, indicating a shift from defence to attraction.
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Affiliation(s)
- Valentina Baldassarre
- Department of Agricultural and Environmental Sciences, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy School of Biosciences, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
| | - Giovanni Cabassi
- CRA-FLC Fodder and Dairy Productions Research Centre, Via A. Lombardo 11, 26900 Lodi, Italy
| | - Natasha D Spadafora
- School of Biosciences, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
| | - Alessio Aprile
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Provinciale Lecce-Monteroni, 73100 Lecce, Italy
| | - Carsten T Müller
- School of Biosciences, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
| | - Hilary J Rogers
- School of Biosciences, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
| | - Antonio Ferrante
- Department of Agricultural and Environmental Sciences, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy
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Bruce TJA. Interplay between insects and plants: dynamic and complex interactions that have coevolved over millions of years but act in milliseconds. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:455-65. [PMID: 25271259 DOI: 10.1093/jxb/eru391] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In an environment with changing availability and quality of host plants, phytophagous insects are under selection pressure to find quality hosts. They need to maximize their fitness by locating suitable plants and avoiding unsuitable ones. Thus, they have evolved a finely tuned sensory system, for detection of host cues, and a nervous system, capable of integrating inputs from sensory neurons with a high level of spatio-temporal resolution. Insect responses to cues are not fixed but depend on the context in which they are perceived, the physiological state of the insect, and prior learning experiences. However, there are examples of insects making 'mistakes' and being attracted to poor quality hosts. While insects have evolved ways of finding hosts, plants have been under selection pressure to do precisely the opposite and evade detection or defend themselves when attacked. Once on the plant, insect-associated molecules may trigger or suppress defence depending on whether the plant or the insect is ahead in evolutionary terms. Plant volatile emission is influenced by defence responses induced by insect feeding or oviposition which can attract natural enemies but repel herbivores. Conversely, plant reproductive fitness is increased by attraction of pollinators. Interactions can be altered by other organisms associated with the plant such as other insects, plant pathogens, or mycorrhizal fungi. Plant phenotype is plastic and can be changed by epigenetic factors in adaptation to periods of biotic stress. Space and time play crucial roles in influencing the outcome of interactions between insects and plants.
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