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Hossain Z, Zhao S, Liu K, Li L, Hubbard M. Deciphering Aphanomyces euteiches-pea-biocontrol bacterium interactions through untargeted metabolomics. Sci Rep 2024; 14:8877. [PMID: 38632368 PMCID: PMC11024177 DOI: 10.1038/s41598-024-52949-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 01/25/2024] [Indexed: 04/19/2024] Open
Abstract
Aphanomyces euteiches causes root rot in pea, leading to significant yield losses. However, the metabolites involved in this pathosystem have not been thoroughly studied. This study aimed to fill this gap and explore mechanisms of bacterial suppression of A. euteiches via untargeted metabolomics using pea grown in a controlled environment. Chemical isotope labeling (CIL), followed by liquid chromatography-mass spectrometry (LC-MS), was used for metabolite separation and detection. Univariate and multivariate analyses showed clear separation of metabolites from pathogen-treated pea roots and roots from other treatments. A three-tier approach positively or putatively identified 5249 peak pairs or metabolites. Of these, 403 were positively identified in tier 1; 940 were putatively identified with high confidence in tier 2. There were substantial changes in amino acid pool, and fatty acid and phenylpropanoid pathway products. More metabolites, including salicylic and jasmonic acids, were upregulated than downregulated in A. euteiches-infected roots. 1-aminocyclopropane-1-carboxylic acid and 12-oxophytodienoic acid were upregulated in A. euteiches + bacterium-treated roots compared to A. euteiches-infected roots. A great number of metabolites were up- or down-regulated in response to A. euteiches infection compared with the control and A. euteiches + bacterium-treated plants. The results of this study could facilitate improved disease management.
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Affiliation(s)
- Zakir Hossain
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, 1 Airport Road, Swift Current, Saskatchewan, S9H 3X2, Canada.
| | - Shuang Zhao
- Department of Chemistry, University of Alberta, Edmonton, AB, T6G 2G2, Canada
| | - Kui Liu
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, 1 Airport Road, Swift Current, Saskatchewan, S9H 3X2, Canada
| | - Liang Li
- Department of Chemistry, University of Alberta, Edmonton, AB, T6G 2G2, Canada
| | - Michelle Hubbard
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, 1 Airport Road, Swift Current, Saskatchewan, S9H 3X2, Canada.
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2
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Archer L, Mondal HA, Behera S, Twayana M, Patel M, Louis J, Nalam VJ, Keereetaweep J, Chowdhury Z, Shah J. Interplay between MYZUS PERSICAE-INDUCED LIPASE 1 and OPDA signaling in limiting green peach aphid infestation on Arabidopsis thaliana. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:6860-6873. [PMID: 37696760 DOI: 10.1093/jxb/erad355] [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: 02/05/2023] [Accepted: 09/09/2023] [Indexed: 09/13/2023]
Abstract
MYZUS PERSICAE-INDUCED LIPASE1 (MPL1) encodes a lipase in Arabidopsis thaliana that is required for limiting infestation by the green peach aphid (GPA; Myzus persicae), an important phloem sap-consuming insect pest. Previously, we demonstrated that MPL1 expression was up-regulated in response to GPA infestation, and GPA fecundity was higher on the mpl1 mutant, compared with the wild-type (WT), and lower on 35S:MPL1 plants that constitutively expressed MPL1 from the 35S promoter. Here, we show that the MPL1 promoter is active in the phloem and expression of the MPL1 coding sequence from the phloem-specific SUC2 promoter in mpl1 is sufficient to restore resistance to GPA. The GPA infestation-associated up-regulation of MPL1 requires CYCLOPHILIN 20-3 (CYP20-3), which encodes a 12-oxo-phytodienoic acid (OPDA)-binding protein that is involved in OPDA signaling, and is required for limiting GPA infestation. OPDA promotes MPL1 expression to limit GPA fecundity, a process that requires CYP20-3 function. These results along with our observation that constitutive expression of MPL1 from the 35S promoter restores resistance to GPA in the cyp20-3 mutant, and MPL1 acts in a feedback loop to limit OPDA levels in GPA-infested plants, suggest that an interplay between MPL1, OPDA, and CYP20-3 contributes to resistance to GPA.
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Affiliation(s)
- Lani Archer
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
- BioDiscovery Institute, University of North Texas, Denton, TX 76203, USA
| | - Hossain A Mondal
- College of Post Graduate Studies in Agricultural Sciences (CPGS-AS, under Central Agricultural University, Imphal, Manipur), Meghalaya 793103, India
| | - Sumita Behera
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
| | - Moon Twayana
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
- BioDiscovery Institute, University of North Texas, Denton, TX 76203, USA
| | - Monika Patel
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
| | - Joe Louis
- Department of Entomology and Department of Biochemistry, University of Nebraska, Lincoln, NE 68583, USA
| | - Vamsi J Nalam
- Department of Agricultural Biology, Colorado State University, Fort Collins, CO 80523, USA
| | | | - Zulkarnain Chowdhury
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
- BioDiscovery Institute, University of North Texas, Denton, TX 76203, USA
| | - Jyoti Shah
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
- BioDiscovery Institute, University of North Texas, Denton, TX 76203, USA
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Agho CA, Kaurilind E, Tähtjärv T, Runno-Paurson E, Niinemets Ü. Comparative transcriptome profiling of potato cultivars infected by late blight pathogen Phytophthora infestans: Diversity of quantitative and qualitative responses. Genomics 2023; 115:110678. [PMID: 37406973 PMCID: PMC10548088 DOI: 10.1016/j.ygeno.2023.110678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 06/30/2023] [Accepted: 07/02/2023] [Indexed: 07/07/2023]
Abstract
The Estonia potato cultivar Ando has shown elevated field resistance to Phytophthora infestans, even after being widely grown for over 40 years. A comprehensive transcriptional analysis was performed using RNA-seq from plant leaf tissues to gain insight into the mechanisms activated for the defense after infection. Pathogen infection in Ando resulted in about 5927 differentially expressed genes (DEGs) compared to 1161 DEGs in the susceptible cultivar Arielle. The expression levels of genes related to plant disease resistance such as serine/threonine kinase activity, signal transduction, plant-pathogen interaction, endocytosis, autophagy, mitogen-activated protein kinase (MAPK), and others were significantly enriched in the upregulated DEGs in Ando, whereas in the susceptible cultivar, only the pathway related to phenylpropanoid biosynthesis was enriched in the upregulated DEGs. However, in response to infection, photosynthesis was deregulated in Ando. Multi-signaling pathways of the salicylic-jasmonic-ethylene biosynthesis pathway were also activated in response to Phytophthora infestans infection.
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Affiliation(s)
- C A Agho
- Chair of Crop Science and Plant Biology, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51006, Estonia.
| | - E Kaurilind
- Chair of Crop Science and Plant Biology, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51006, Estonia
| | - T Tähtjärv
- Centre of Estonian Rural Research and Knowledge, J. Aamisepa 1, 48309 Jõgeva, Estonia
| | - E Runno-Paurson
- Chair of Crop Science and Plant Biology, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51006, Estonia
| | - Ü Niinemets
- Chair of Crop Science and Plant Biology, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51006, Estonia; Estonian Academy of Sciences, Kohtu 6, Tallinn 10130, Estonia
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Lewis DC, Stevens DM, Little H, Coaker GL, Bostock RM. Overlapping Local and Systemic Defense Induced by an Oomycete Fatty Acid MAMP and Brown Seaweed Extract in Tomato. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2023; 36:359-371. [PMID: 36802868 PMCID: PMC10754052 DOI: 10.1094/mpmi-09-22-0192-r] [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] [Indexed: 06/18/2023]
Abstract
Eicosapolyenoic fatty acids are integral components of oomycete pathogens that can act as microbe-associated molecular patterns to induce disease resistance in plants. Defense-inducing eicosapolyenoic fatty acids include arachidonic acid (AA) and eicosapentaenoic acid and are strong elicitors in solanaceous plants, with bioactivity in other plant families. Similarly, extracts of a brown seaweed, Ascophyllum nodosum, used in sustainable agriculture as a biostimulant of plant growth, may also induce disease resistance. A. nodosum, similar to other macroalgae, is rich in eicosapolyenoic fatty acids, which comprise as much as 25% of total fatty acid composition. We investigated the response of roots and leaves from AA or a commercial A. nodosum extract (ANE) on root-treated tomatoes via RNA sequencing, phytohormone profiling, and disease assays. AA and ANE significantly altered transcriptional profiles relative to control plants, inducing numerous defense-related genes with both substantial overlap and differences in gene expression patterns. Root treatment with AA and, to a lesser extent, ANE also altered both salicylic acid and jasmonic acid levels while inducing local and systemic resistance to oomycete and bacterial pathogen challenge. Thus, our study highlights overlap in both local and systemic defense induced by AA and ANE, with potential for inducing broad-spectrum resistance against pathogens. [Formula: see text] Copyright © 2023 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Domonique C. Lewis
- Department of Plant Pathology, University of California, Davis, CA 95616, U.S.A
| | - Danielle M. Stevens
- Department of Plant Pathology, University of California, Davis, CA 95616, U.S.A
| | - Holly Little
- Acadian Plant Health, Acadian Seaplants Limited, Dartmouth, Nova Scotia, Canada
| | - Gitta L. Coaker
- Department of Plant Pathology, University of California, Davis, CA 95616, U.S.A
| | - Richard M. Bostock
- Department of Plant Pathology, University of California, Davis, CA 95616, U.S.A
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Adigun OA, Pham TH, Grapov D, Nadeem M, Jewell LE, Cheema M, Galagedara L, Thomas R. Phyto-oxylipin mediated plant immune response to colonization and infection in the soybean- Phytophthora sojae pathosystem. FRONTIERS IN PLANT SCIENCE 2023; 14:1141823. [PMID: 37251755 PMCID: PMC10219219 DOI: 10.3389/fpls.2023.1141823] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/06/2023] [Indexed: 05/31/2023]
Abstract
Introduction Food security is a major challenge to sustainably supply food to meet the demands of the ever-growing global population. Crop loss due to pathogens is a major concern to overcoming this global food security challenge. Soybean root and stem rot caused by Phytophthora sojae results in approximately 20B $US crop loss annually. Phyto-oxylipins are metabolites biosynthesized in the plants by oxidative transformation of polyunsaturated fatty acids through an array of diverging metabolic pathways and play an important role in plant development and defense against pathogen colonization and infection. Lipid mediated plant immunity is a very attractive target for developing long term resistance in many plants' disease pathosystem. However, little is known about the phyto-oxylipin's role in the successful strategies used by tolerant soybean cultivar to mitigate Phytophthora sojae infection. Methods We used scanning electron microscopy to observe the alterations in root morphology and a targeted lipidomics approach using high resolution accurate mass tandem mass spectrometry to assess phyto-oxylipin anabolism at 48 h, 72 h and 96 h post infection. Results and discussion We observed the presence of biogenic crystals and reinforced epidermal walls in the tolerant cultivar suggesting a mechanism for disease tolerance when compared with susceptible cultivar. Similarly, the unequivocally unique biomarkers implicated in oxylipin mediated plant immunity [10(E),12(Z)-13S-hydroxy-9(Z),11(E),15(Z)-octadecatrienoic acid, (Z)-12,13-dihydroxyoctadec-9-enoic acid, (9Z,11E)-13-Oxo-9,11-octadecadienoic acid, 15(Z)-9-oxo-octadecatrienoic acid, 10(E),12(E)-9-hydroperoxyoctadeca-10,12-dienoic acid, 12-oxophytodienoic acid and (12Z,15Z)-9, 10-dihydroxyoctadeca-12,15-dienoic acid] generated from intact oxidized lipid precursors were upregulated in tolerant soybean cultivar while downregulated in infected susceptible cultivar relative to non-inoculated controls at 48 h, 72 h and 96 h post infection by Phytophthora sojae, suggesting that these molecules may be a critical component of the defense strategies used in tolerant cultivar against Phytophthora sojae infection. Interestingly, microbial originated oxylipins, 12S-hydroperoxy-5(Z),8(Z),10(E),14(Z)-eicosatetraenoic acid and (4Z,7Z,10Z,13Z)-15-[3-[(Z)-pent-2-enyl]oxiran-2-yl]pentadeca-4,7,10,13-tetraenoic acid were upregulated only in infected susceptible cultivar but downregulated in infected tolerant cultivar. These microbial originated oxylipins are capable of modulating plant immune response to enhance virulence. This study demonstrated novel evidence for phyto-oxylipin metabolism in soybean cultivars during pathogen colonization and infection using the Phytophthora sojae-soybean pathosystem. This evidence may have potential applications in further elucidation and resolution of the role of phyto-oxylipin anabolism in soybean tolerance to Phytophthora sojae colonization and infection.
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Affiliation(s)
- Oludoyin Adeseun Adigun
- School of Science and the Environment, Boreal Ecosystems and Agricultural Sciences, Grenfell Campus, Memorial University of Newfoundland, Corner Brook, NL, Canada
| | - Thu Huong Pham
- School of Science and the Environment, Boreal Ecosystems and Agricultural Sciences, Grenfell Campus, Memorial University of Newfoundland, Corner Brook, NL, Canada
| | - Dmitry Grapov
- Creative Data Solution (CDS), Colfax, CA, United States
| | - Muhammad Nadeem
- School of Science and the Environment, Boreal Ecosystems and Agricultural Sciences, Grenfell Campus, Memorial University of Newfoundland, Corner Brook, NL, Canada
| | - Linda Elizabeth Jewell
- St. John’s Research and Development Centre, Agriculture and Agri-Food Canada, St. John’s, NL, Canada
| | - Mumtaz Cheema
- School of Science and the Environment, Boreal Ecosystems and Agricultural Sciences, Grenfell Campus, Memorial University of Newfoundland, Corner Brook, NL, Canada
| | - Lakshman Galagedara
- School of Science and the Environment, Boreal Ecosystems and Agricultural Sciences, Grenfell Campus, Memorial University of Newfoundland, Corner Brook, NL, Canada
| | - Raymond Thomas
- School of Science and the Environment, Boreal Ecosystems and Agricultural Sciences, Grenfell Campus, Memorial University of Newfoundland, Corner Brook, NL, Canada
- Department of Biology/Biotron Climate Change Experimental Research Centre, Western University, London, ON, Canada
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6
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Tran AD, Cho K, Han O. Rice peroxygenase catalyzes lipoxygenase-dependent regiospecific epoxidation of lipid peroxides in the response to abiotic stressors. Bioorg Chem 2023; 131:106285. [PMID: 36450198 DOI: 10.1016/j.bioorg.2022.106285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 11/15/2022] [Accepted: 11/17/2022] [Indexed: 11/25/2022]
Abstract
The peroxygenase pathway plays pivotal roles in plant responses to oxidative stress and other environmental stressors. Analysis of a network of co-expressed stress-regulated rice genes demonstrated that expression of OsPXG9 is negatively correlated with expression of genes involved in jasmonic acid biosynthesis. DNA sequence analysis and structure/function studies reveal that OsPXG9 is a caleosin-like peroxygenase with amphipathic α-helices that localizes to lipid droplets in rice cells. Enzymatic studies demonstrate that 12-epoxidation is slightly more favorable with 9(S)-hydroperoxyoctadecatrienoic acid than with 9(S)-hydroperoxyoctadecadienoic acid as substrate. The products of 12-epoxidation are labile, and the epoxide ring is hydrolytically cleaved into corresponding trihydroxy compounds. On the other hand, OsPXG9 catalyzed 15-epoxidation of 13(S)-hydroperoxyoctadecatrienoic acid generates a relatively stable epoxide product. Therefore, the regiospecific 12- or 15-epoxidation catalyzed by OsPXG9 strongly depends on activation of the 9- or 13- peroxygenase reaction pathways, with their respective preferred substrates. The relative abundance of products in the 9-PXG and 13-PXG pathways suggest that the 12-epoxidation involves intramolecular oxygen transfer while the 15-epoxidation can proceed via intramolecular or intermolecular oxygen transfer. Expression of OsPXG9 is up-regulated by abiotic stimuli such as drought and salt stress, but it is down-regulated by biotic stimuli such as flagellin 22 and salicylic acid. The results suggest that the primary function of OsPXG9 is to modulate the level of lipid peroxides to facilitate effective defense responses to abiotic and biotic stressors.
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Affiliation(s)
- Anh Duc Tran
- Department of Molecular Biotechnology and Kumho Life Science Laboratory, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Kyoungwon Cho
- Department of Molecular Biotechnology and Kumho Life Science Laboratory, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Oksoo Han
- Department of Molecular Biotechnology and Kumho Life Science Laboratory, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea.
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Savchenko T, Degtyaryov E, Radzyukevich Y, Buryak V. Therapeutic Potential of Plant Oxylipins. Int J Mol Sci 2022; 23:ijms232314627. [PMID: 36498955 PMCID: PMC9741157 DOI: 10.3390/ijms232314627] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 11/25/2022] Open
Abstract
For immobile plants, the main means of protection against adverse environmental factors is the biosynthesis of various secondary (specialized) metabolites. The extreme diversity and high biological activity of these metabolites determine the researchers' interest in plants as a source of therapeutic agents. Oxylipins, oxygenated derivatives of fatty acids, are particularly promising in this regard. Plant oxylipins, which are characterized by a diversity of chemical structures, can exert protective and therapeutic properties in animal cells. While the therapeutic potential of some classes of plant oxylipins, such as jasmonates and acetylenic oxylipins, has been analyzed thoroughly, other oxylipins are barely studied in this regard. Here, we present a comprehensive overview of the therapeutic potential of all major classes of plant oxylipins, including derivatives of acetylenic fatty acids, jasmonates, six- and nine-carbon aldehydes, oxy-, epoxy-, and hydroxy-derivatives of fatty acids, as well as spontaneously formed phytoprostanes and phytofurans. The presented analysis will provide an impetus for further research investigating the beneficial properties of these secondary metabolites and bringing them closer to practical applications.
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Affiliation(s)
- Tatyana Savchenko
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia
| | - Evgeny Degtyaryov
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia
- Puschchino State Institute of Natural Sciences, Prospect Nauki st., 3, 142290 Pushchino, Russia
| | - Yaroslav Radzyukevich
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia
| | - Vlada Buryak
- Faculty of Biotechnology, Moscow State University, Leninskie Gory 1, str. 51, 119991 Moscow, Russia
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia
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Zhu L, Huang J, Lu X, Zhou C. Development of plant systemic resistance by beneficial rhizobacteria: Recognition, initiation, elicitation and regulation. FRONTIERS IN PLANT SCIENCE 2022; 13:952397. [PMID: 36017257 PMCID: PMC9396261 DOI: 10.3389/fpls.2022.952397] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 07/21/2022] [Indexed: 06/15/2023]
Abstract
A plant growing in nature is not an individual, but it holds an intricate community of plants and microbes with relatively stable partnerships. The microbial community has recently been demonstrated to be closely linked with plants since their earliest evolution, to help early land plants adapt to environmental threats. Mounting evidence has indicated that plants can release diverse kinds of signal molecules to attract beneficial bacteria for mediating the activities of their genetics and biochemistry. Several rhizobacterial strains can promote plant growth and enhance the ability of plants to withstand pathogenic attacks causing various diseases and loss in crop productivity. Beneficial rhizobacteria are generally called as plant growth-promoting rhizobacteria (PGPR) that induce systemic resistance (ISR) against pathogen infection. These ISR-eliciting microbes can mediate the morphological, physiological and molecular responses of plants. In the last decade, the mechanisms of microbial signals, plant receptors, and hormone signaling pathways involved in the process of PGPR-induced ISR in plants have been well investigated. In this review, plant recognition, microbial elicitors, and the related pathways during plant-microbe interactions are discussed, with highlights on the roles of root hair-specific syntaxins and small RNAs in the regulation of the PGPR-induced ISR in plants.
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Affiliation(s)
- Lin Zhu
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu, China
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Jiameng Huang
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu, China
| | - Xiaoming Lu
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu, China
| | - Cheng Zhou
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu, China
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-Saving Fertilizers, Nanjing Agricultural University, Nanjing, China
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Liu R, Bao ZX, Li GH, Li CQ, Wang SL, Pan XR, Zhang KQ, Zhao PJ. Identification of Nematicidal Metabolites from Purpureocillium lavendulum. Microorganisms 2022; 10:microorganisms10071343. [PMID: 35889062 PMCID: PMC9325011 DOI: 10.3390/microorganisms10071343] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 06/30/2022] [Indexed: 02/01/2023] Open
Abstract
Purpureocillium lavendulum is a fungus with promising biocontrol applications. Here, transcriptome data acquired during the infection of Caenorhabditis elegans by Purpureocillium lavendulum showed that the transcription of metabolite synthesis genes was significantly up-regulated after 24 and 48 h of the fungus-nematode interaction. Then, the up-regulated transcription level of lipoxygenase was confirmed by RT-qPCR. The ultra-performance liquid chromatography-mass spectrometry (UPLC-MS) analysis of differential metabolites revealed that this interaction resulted in the emergence of new metabolites or enhanced the production of metabolites. The results of the UPLC-MS analysis and the nematicidal assay were used to establish optimal culturing conditions under which 12 metabolites, including 3 hydroxylated C18 fatty acids and 9 steroids, were isolated and identified. Among them, hydroxylated fatty acids showed pronounced nematicidal activity against Meloidogyne incognita, and two degradative sterols showed chemotaxis activity to M. incognita. This study lays a foundation for the function of lipoxygenase and its products during the infection of Purpureocillium lavendulum.
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Baur S, Bellé N, Frank O, Wurzer S, Pieczonka SA, Fromme T, Stam R, Hausladen H, Hofmann T, Hückelhoven R, Dawid C. Steroidal Saponins─New Sources to Develop Potato ( Solanum tuberosum L.) Genotypes Resistant against Certain Phytophthora infestans Strains. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:7447-7459. [PMID: 35679324 DOI: 10.1021/acs.jafc.2c02575] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Plant pathogens such as Phytophthora infestans that caused the Irish Potato Famine continue to threaten local and global food security. Genetic and chemical plant protection measures are often overcome by adaptation of pathogen population structures. Therefore, there is a constant demand for new, consumer- and environment-friendly plant protection strategies. Metabolic alterations induced by P. infestans in the foliage and tubers of six different potato cultivars were investigated. Using a combination of untargeted metabolomics, isolation techniques, and structure elucidation by MS and 1D/2D-NMR experiments, five steroidal glycoalkaloids, five oxylipins, and four steroidal saponins were identified. As the steroidal saponins showed antioomycete but no hemolytic activity, they may thus be considered as probably safe target substances for enrichment in breeding programs for disease resistance and as chemical lead structures for the production of nature-derived synthetic antioomycetes.
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Affiliation(s)
- Sebastian Baur
- Chair of Food Chemistry and Molecular Sensory Science, Technische Universität München, Lise-Meitner-Straße 34, 85354 Freising, Germany
| | - Nicole Bellé
- Chair of Phytopathology, Technische Universität München, Emil-Ramann-Straße 2, 85354 Freising, Germany
| | - Oliver Frank
- Chair of Food Chemistry and Molecular Sensory Science, Technische Universität München, Lise-Meitner-Straße 34, 85354 Freising, Germany
| | - Sebastian Wurzer
- Chair of Food Chemistry and Molecular Sensory Science, Technische Universität München, Lise-Meitner-Straße 34, 85354 Freising, Germany
| | - Stefan Alexander Pieczonka
- Chair of Food Chemistry and Molecular Sensory Science, Technische Universität München, Lise-Meitner-Straße 34, 85354 Freising, Germany
| | - Tobias Fromme
- Chair for Molecular Nutritional Medicine, Technische Universität München, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Remco Stam
- Chair of Phytopathology, Technische Universität München, Emil-Ramann-Straße 2, 85354 Freising, Germany
| | - Hans Hausladen
- Plant Technology Center, Technische Universität München, Dürnast 9, 85354 Freising, Germany
| | - Thomas Hofmann
- Chair of Food Chemistry and Molecular Sensory Science, Technische Universität München, Lise-Meitner-Straße 34, 85354 Freising, Germany
| | - Ralph Hückelhoven
- Chair of Phytopathology, Technische Universität München, Emil-Ramann-Straße 2, 85354 Freising, Germany
| | - Corinna Dawid
- Chair of Food Chemistry and Molecular Sensory Science, Technische Universität München, Lise-Meitner-Straße 34, 85354 Freising, Germany
- Bavarian Center for Biomolecular Mass Spectrometry, Technische Universität München, Gregor-Mendel-Straße 4, 85354 Freising, Germany
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11
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Lung SC, Lai SH, Wang H, Zhang X, Liu A, Guo ZH, Lam HM, Chye ML. Oxylipin signaling in salt-stressed soybean is modulated by ligand-dependent interaction of Class II acyl-CoA-binding proteins with lipoxygenase. THE PLANT CELL 2022; 34:1117-1143. [PMID: 34919703 PMCID: PMC8894927 DOI: 10.1093/plcell/koab306] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 12/11/2021] [Indexed: 05/24/2023]
Abstract
Plant lipoxygenases (LOXs) oxygenate linoleic and linolenic acids, creating hydroperoxy derivatives, and from these, jasmonates and other oxylipins are derived. Despite the importance of oxylipin signaling, its activation mechanism remains largely unknown. Here, we show that soybean ACYL-COA-BINDING PROTEIN3 (ACBP3) and ACBP4, two Class II acyl-CoA-binding proteins, suppressed activity of the vegetative LOX homolog VLXB by sequestering it at the endoplasmic reticulum. The ACBP4-VLXB interaction was facilitated by linoleoyl-CoA and linolenoyl-CoA, which competed with phosphatidic acid (PA) for ACBP4 binding. In salt-stressed roots, alternative splicing produced ACBP variants incapable of VLXB interaction. Overexpression of the variants enhanced LOX activity and salt tolerance in Arabidopsis and soybean hairy roots, whereas overexpressors of the native forms exhibited reciprocal phenotypes. Consistently, the differential alternative splicing pattern in two soybean genotypes coincided with their difference in salt-induced lipid peroxidation. Salt-treated soybean roots were enriched in C32:0-PA species that showed high affinity to Class II ACBPs. We conclude that PA signaling and alternative splicing suppress ligand-dependent interaction of Class II ACBPs with VLXB, thereby triggering lipid peroxidation during salt stress. Hence, our findings unveil a dual mechanism that initiates the onset of oxylipin signaling in the salinity response.
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Affiliation(s)
- Shiu-Cheung Lung
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Sze Han Lai
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Haiyang Wang
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Xiuying Zhang
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Ailin Liu
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Ze-Hua Guo
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Hon-Ming Lam
- School of Life Sciences and Centre for Soybean Research of the State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Mee-Len Chye
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
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Gorshkov VY, Toporkova YY, Tsers ID, Smirnova EO, Ogorodnikova AV, Gogoleva NE, Parfirova OI, Petrova OE, Gogolev YV. Differential modulation of the lipoxygenase cascade during typical and latent Pectobacterium atrosepticum infections. ANNALS OF BOTANY 2022; 129:271-286. [PMID: 34417794 PMCID: PMC8835645 DOI: 10.1093/aob/mcab108] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 08/18/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND AND AIMS Plant diseases caused by Pectobacterium atrosepticum are often accompanied by extensive rot symptoms. In addition, these bacteria are able to interact with host plants without causing disease for long periods, even throughout several host plant generations. There is, to date, no information on the comparative physiology/biochemistry of symptomatic and asymptomatic plant-P. atrosepticum interactions. Typical (symptomatic) P. atrosepticum infections are associated with the induction of plant responses mediated by jasmonates, which are one of the products of the lipoxygenase cascade that gives origin to many other oxylipins with physiological activities. In this study, we compared the functioning of the lipoxygenase cascade following typical and latent (asymptomatic) infections to gain better insight into the physiological basis of the asymptomatic and antagonistic coexistence of plants and pectobacteria. METHODS Tobacco plants were mock-inoculated (control) or infected with the wild type P. atrosepticum (typical infection) or its coronafacic acid-deficient mutant (latent infection). The expression levels of the target lipoxygenase cascade-related genes were assessed by Illumina RNA sequencing. Oxylipin profiles were analysed by GC-MS. With the aim of revising the incorrect annotation of one of the target genes, its open reading frame was cloned to obtain the recombinant protein, which was further purified and characterized using biochemical approaches. KEY RESULTS The obtained data demonstrate that when compared to the typical infection, latent asymptomatic P. atrosepticum infection is associated with (and possibly maintained due to) decreased levels of 9-lipoxygenase branch products and jasmonic acid and increased level of cis-12-oxo-10,15-phytodienoic acid. The formation of 9-oxononanoic acid and epoxyalcohols in tobacco plants was based on the identification of the first tobacco hydroperoxide lyase (HPL) with additional epoxyalcohol synthase (EAS) activity. CONCLUSIONS Our results contribute to the hypothesis of the oxylipin signature, indicating that different types of plant interactions with a particular pathogen are characterized by the different oxylipin profiles of the host plant. In addition, the tobacco LOC107825278 gene was demonstrated to encode an NtHPL (CYP74C43) enzyme yielding volatile aldehydes and aldoacids (HPL products) as well as oxiranyl carbinols (EAS products).
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Affiliation(s)
- Vladimir Y Gorshkov
- Kazan Institute of Biochemistry and Biophysics, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
- Laboratory of Plant Infectious Diseases, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
- Kazan Federal University, 420111 Kazan, Russia
| | - Yana Y Toporkova
- Kazan Institute of Biochemistry and Biophysics, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
| | - Ivan D Tsers
- Laboratory of Plant Infectious Diseases, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
- Kazan Federal University, 420111 Kazan, Russia
| | - Elena O Smirnova
- Kazan Institute of Biochemistry and Biophysics, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
| | - Anna V Ogorodnikova
- Kazan Institute of Biochemistry and Biophysics, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
| | - Natalia E Gogoleva
- Kazan Institute of Biochemistry and Biophysics, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
- Laboratory of Plant Infectious Diseases, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
- Kazan Federal University, 420111 Kazan, Russia
| | - Olga I Parfirova
- Kazan Institute of Biochemistry and Biophysics, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
- Laboratory of Plant Infectious Diseases, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
| | - Olga E Petrova
- Kazan Institute of Biochemistry and Biophysics, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
- Laboratory of Plant Infectious Diseases, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
| | - Yuri V Gogolev
- Kazan Institute of Biochemistry and Biophysics, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
- Laboratory of Plant Infectious Diseases, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
- Kazan Federal University, 420111 Kazan, Russia
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13
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Wasternack C. Deciphering the oxylipin signatures of necrotrophic infection in plants. A commentary on: Differential modulation of the lipoxygenase cascade during typical and latent Pectobacterium atrosepticum infections. ANNALS OF BOTANY 2022; 129:i-iii. [PMID: 34882765 PMCID: PMC8835628 DOI: 10.1093/aob/mcab142] [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] [Indexed: 06/13/2023]
Abstract
This article comments on: Vladimir Y. Gorshkov, Yana Y. Toporkova, Ivan D. Tsers, Elena O. Smirnova, Anna V. Ogorodnikova, Natalia E. Gogoleva, Olga I. Parfirova, Olga E. Petrova, and Yuri V. Gogolev, Differential modulation of the lipoxygenase cascade during typical and latent Pectobacterium atrosepticum infections, Annals of Botany, Volume 129, Issue 3, 16 Februray 2022, Pages 271–285 https://doi.org/10.1093/aob/mcab108
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Affiliation(s)
- Claus Wasternack
- Department of Molecular Signal Processing, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
- Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research, Institute of Experimental Botany AS CR & Palacký University, Šlechtitelů 11, CZ-78371 Olomouc, Czech Republic
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14
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Izquierdo Y, Muñiz L, Vicente J, Kulasekaran S, Aguilera V, López Sánchez A, Martínez-Ayala A, López B, Cascón T, Castresana C. Oxylipins From Different Pathways Trigger Mitochondrial Stress Signaling Through Respiratory Complex III. FRONTIERS IN PLANT SCIENCE 2021; 12:705373. [PMID: 34394161 PMCID: PMC8358658 DOI: 10.3389/fpls.2021.705373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 07/02/2021] [Indexed: 06/13/2023]
Abstract
Plant oxylipins are signaling molecules produced from fatty acids by oxidative pathways, mainly initiated by 9- and 13-lipoxygenases (9-LOX and 13-LOX), alpha-dioxygenases or non-enzymatic oxidation. Oxylipins from the 9-LOX pathway induce oxidative stress and control root development and plant defense. These activities have been associated with mitochondrial processes, but precise cellular targets and pathways remain unknown. In order to study oxylipin signaling, we previously generated a collection of Arabidopsis thaliana mutants that were insensitive to the 9-LOX products 9(S)-hydroxy-10,12, 15-octadecatrienoic acid (9-HOT) and its ketone derivative 9-KOT (noxy mutants). Here, we describe noxy1, noxy3, noxy5, noxy23, and noxy54 mutants, all affected in nucleus-encoded mitochondrial proteins, and use them to study the role of mitochondria in oxylipin signaling. Functional and phenotypic analyses showed that noxy plants displayed mitochondrial aggregation, reduced respiration rates and resistance to the complex III inhibitor Antimycin A (AA), thus indicating a close similarity of the oxylipin signaling and mitochondrial stress. Application of 9-HOT and 9-KOT protected plants against subsequent mitochondrial stress, whereas they boosted root growth reduction when applied in combination with complex III inhibitors but did not with inhibitors of other respiratory complexes. A similar effect was caused by linear-chain oxylipins from 13-LOX or non-enzymatic pathways having α,β-unsaturated hydroxyl or keto groups in their structure. Studies to investigate 9-HOT and 9-KOT activity indicated that they do not reduce respiration rates, but their action is primarily associated with enhanced ROS responses. This was supported by the results showing that 9-HOT or 9-KOT combined with AA amplified the expression of oxylipin- and ROS-responding genes but not of the AA marker AOX1a, thus implying the activation of a specific mitochondria retrograde signaling pathway. Our results implicate mitochondrial complex III as a hub in the signaling activity of multiple oxylipin pathways and point at downstream ROS responses as components of oxylipin function.
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Affiliation(s)
- Yovanny Izquierdo
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
| | - Luis Muñiz
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
| | - Jorge Vicente
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
- School of Biosciences, University of Nottingham, Nottingham, United Kingdom
| | - Satish Kulasekaran
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
| | - Verónica Aguilera
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
| | - Ana López Sánchez
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
| | - Ada Martínez-Ayala
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
| | - Bran López
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
| | - Tomás Cascón
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
| | - Carmen Castresana
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
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15
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Guevara L, Domínguez-Anaya MÁ, Ortigosa A, González-Gordo S, Díaz C, Vicente F, Corpas FJ, Pérez del Palacio J, Palma JM. Identification of Compounds with Potential Therapeutic Uses from Sweet Pepper ( Capsicum annuum L.) Fruits and Their Modulation by Nitric Oxide (NO). Int J Mol Sci 2021; 22:ijms22094476. [PMID: 33922964 PMCID: PMC8123290 DOI: 10.3390/ijms22094476] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/15/2021] [Accepted: 04/20/2021] [Indexed: 12/14/2022] Open
Abstract
Plant species are precursors of a wide variety of secondary metabolites that, besides being useful for themselves, can also be used by humans for their consumption and economic benefit. Pepper (Capsicum annuum L.) fruit is not only a common food and spice source, it also stands out for containing high amounts of antioxidants (such as vitamins C and A), polyphenols and capsaicinoids. Particular attention has been paid to capsaicin, whose anti-inflammatory, antiproliferative and analgesic activities have been reported in the literature. Due to the potential interest in pepper metabolites for human use, in this project, we carried out an investigation to identify new bioactive compounds of this crop. To achieve this, we applied a metabolomic approach, using an HPLC (high-performance liquid chromatography) separative technique coupled to metabolite identification by high resolution mass spectrometry (HRMS). After chromatographic analysis and data processing against metabolic databases, 12 differential bioactive compounds were identified in sweet pepper fruits, including quercetin and its derivatives, L-tryptophan, phytosphingosin, FAD, gingerglycolipid A, tetrahydropentoxylin, blumenol C glucoside, colnelenic acid and capsoside A. The abundance of these metabolites varied depending on the ripening stage of the fruits, either immature green or ripe red. We also studied the variation of these 12 metabolites upon treatment with exogenous nitric oxide (NO), a free radical gas involved in a good number of physiological processes in higher plants such as germination, growth, flowering, senescence, and fruit ripening, among others. Overall, it was found that the content of the analyzed metabolites depended on the ripening stage and on the presence of NO. The metabolic pattern followed by quercetin and its derivatives, as a consequence of the ripening stage and NO treatment, was also corroborated by transcriptomic analysis of genes involved in the synthesis of these compounds. This opens new research perspectives on the pepper fruit’s bioactive compounds with nutraceutical potentiality, where biotechnological strategies can be applied for optimizing the level of these beneficial compounds.
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Affiliation(s)
- Lucía Guevara
- Group of Antioxidant, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, 18008 Granada, Spain; (L.G.); (M.Á.D.-A.); (A.O.); (S.G.-G.); (F.J.C.)
| | - María Ángeles Domínguez-Anaya
- Group of Antioxidant, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, 18008 Granada, Spain; (L.G.); (M.Á.D.-A.); (A.O.); (S.G.-G.); (F.J.C.)
| | - Alba Ortigosa
- Group of Antioxidant, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, 18008 Granada, Spain; (L.G.); (M.Á.D.-A.); (A.O.); (S.G.-G.); (F.J.C.)
| | - Salvador González-Gordo
- Group of Antioxidant, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, 18008 Granada, Spain; (L.G.); (M.Á.D.-A.); (A.O.); (S.G.-G.); (F.J.C.)
| | - Caridad Díaz
- Department of Screening & Target Validation, Fundación MEDINA, 18016 Granada, Spain; (C.D.); (F.V.); (J.P.d.P.)
| | - Francisca Vicente
- Department of Screening & Target Validation, Fundación MEDINA, 18016 Granada, Spain; (C.D.); (F.V.); (J.P.d.P.)
| | - Francisco J. Corpas
- Group of Antioxidant, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, 18008 Granada, Spain; (L.G.); (M.Á.D.-A.); (A.O.); (S.G.-G.); (F.J.C.)
| | - José Pérez del Palacio
- Department of Screening & Target Validation, Fundación MEDINA, 18016 Granada, Spain; (C.D.); (F.V.); (J.P.d.P.)
| | - José M. Palma
- Group of Antioxidant, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, 18008 Granada, Spain; (L.G.); (M.Á.D.-A.); (A.O.); (S.G.-G.); (F.J.C.)
- Correspondence: ; Tel.: +34-958-181-1600; Fax: +34-958-181-609
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16
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Fitoussi N, Borrego E, Kolomiets MV, Qing X, Bucki P, Sela N, Belausov E, Braun Miyara S. Oxylipins are implicated as communication signals in tomato-root-knot nematode (Meloidogyne javanica) interaction. Sci Rep 2021; 11:326. [PMID: 33431951 PMCID: PMC7801703 DOI: 10.1038/s41598-020-79432-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 12/02/2020] [Indexed: 01/29/2023] Open
Abstract
Throughout infection, plant-parasitic nematodes activate a complex host defense response that will regulate their development and aggressiveness. Oxylipins-lipophilic signaling molecules-are part of this complex, performing a fundamental role in regulating plant development and immunity. At the same time, the sedentary root-knot nematode Meloidogyne spp. secretes numerous effectors that play key roles during invasion and migration, supporting construction and maintenance of nematodes' feeding sites. Herein, comprehensive oxylipin profiling of tomato roots, performed using LC-MS/MS, indicated strong and early responses of many oxylipins following root-knot nematode infection. To identify genes that might respond to the lipidomic defense pathway mediated through oxylipins, RNA-Seq was performed by exposing Meloidogyne javanica second-stage juveniles to tomato protoplasts and the oxylipin 9-HOT, one of the early-induced oxylipins in tomato roots upon nematode infection. A total of 7512 differentially expressed genes were identified. To target putative effectors, we sought differentially expressed genes carrying a predicted secretion signal peptide. Among these, several were homologous with known effectors in other nematode species; other unknown, potentially secreted proteins may have a role as root-knot nematode effectors that are induced by plant lipid signals. These include effectors associated with distortion of the plant immune response or manipulating signal transduction mediated by lipid signals. Other effectors are implicated in cell wall degradation or ROS detoxification at the plant-nematode interface. Being an integral part of the plant's defense response, oxylipins might be placed as important signaling molecules underlying nematode parasitism.
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Affiliation(s)
- Nathalia Fitoussi
- Department of Entomology, Nematology and Chemistry Units, Agricultural Research Organization (ARO), The Volcani Center, P.O. Box 15159, 50250, Rishon LeZion, Bet Dagan, Israel
- Department of Plant Pathology and Microbiology, The Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, 76100, Rehovot, Israel
| | - Eli Borrego
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, NY, 14623, USA
| | - Michael V Kolomiets
- Department of Plant Pathology and Microbiology, Texas A&M University, TAMU 2132, College Station, 77843-2132, USA
| | - Xue Qing
- Department of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Patricia Bucki
- Department of Entomology, Nematology and Chemistry Units, Agricultural Research Organization (ARO), The Volcani Center, P.O. Box 15159, 50250, Rishon LeZion, Bet Dagan, Israel
| | - Noa Sela
- Department of Plant Pathology and Weed Research, ARO, The Volcani Center, 50250, Bet Dagan, Israel
| | - Eduard Belausov
- Department of Plant Sciences, Ornamental Plants and Agricultural Biotechnology, ARO, The Volcani Center, 50250, Bet Dagan, Israel
| | - Sigal Braun Miyara
- Department of Entomology, Nematology and Chemistry Units, Agricultural Research Organization (ARO), The Volcani Center, P.O. Box 15159, 50250, Rishon LeZion, Bet Dagan, Israel.
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17
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Hashemi L, Golparvar AR, Nasr-Esfahani M, Golabadi M. Expression analysis of defense-related genes in cucumber (Cucumis sativus L.) against Phytophthora melonis. Mol Biol Rep 2020; 47:4933-4944. [DOI: 10.1007/s11033-020-05520-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 05/14/2020] [Indexed: 11/30/2022]
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18
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Mareya CR, Tugizimana F, Di Lorenzo F, Silipo A, Piater LA, Molinaro A, Dubery IA. Adaptive defence-related changes in the metabolome of Sorghum bicolor cells in response to lipopolysaccharides of the pathogen Burkholderia andropogonis. Sci Rep 2020; 10:7626. [PMID: 32376849 PMCID: PMC7203242 DOI: 10.1038/s41598-020-64186-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 04/06/2020] [Indexed: 12/12/2022] Open
Abstract
Plant cell suspension culture systems are valuable for the study of complex biological systems such as inducible defence responses and aspects of plant innate immunity. Perturbations to the cellular metabolome can be investigated using metabolomic approaches in order to reveal the underlying metabolic mechanism of cellular responses. Lipopolysaccharides from the sorghum pathogen, Burkholderia andropogonis (LPSB.a.), were purified, chemically characterised and structurally elucidated. The lipid A moiety consists of tetra- and penta-acylated 1,4'-bis-phosphorylated disaccharide backbone decorated by aminoarabinose residues, while the O-polysaccharide chain consists of linear trisaccharide repeating units of [→2)-α-Rha3CMe-(1 → 3)-α-Rha-(1 → 3)-α-Rha-(1 → ]. The effect of LPSB.a. in triggering metabolic reprogramming in Sorghum bicolor cells were investigated using untargeted metabolomics with liquid chromatography coupled to mass spectrometry detection. Cells were treated with LPSB.a. and the metabolic changes monitored over a 30 h time period. Alterations in the levels of phytohormones (jasmonates, zeatins, traumatic-, azelaic- and abscisic acid), which marked the onset of defence responses and accumulation of defence-related metabolites, were observed. Phenylpropanoids and indole alkaloids as well as oxylipins that included di- and trihydroxyoctadecedienoic acids were identified as signatory biomarkers, with marked secretion into the extracellular milieu. The study demonstrated that sorghum cells recognise LPSB.a. as a 'microbe-associated molecular pattern', perturbing normal cellular homeostasis. The molecular features of the altered metabolome were associated with phytohormone-responsive metabolomic reconfiguration of primary and secondary metabolites originating from various metabolic pathways, in support of defence and immunity.
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Affiliation(s)
- Charity R Mareya
- Research Centre for Plant Metabolomics, Department of Biochemistry, University of Johannesburg, Auckland Park, 2006, South Africa
| | - Fidele Tugizimana
- Research Centre for Plant Metabolomics, Department of Biochemistry, University of Johannesburg, Auckland Park, 2006, South Africa
| | - Flaviana Di Lorenzo
- Department of Chemical Sciences, University of Napoli Federico II, Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126, Napoli, Italy
| | - Alba Silipo
- Department of Chemical Sciences, University of Napoli Federico II, Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126, Napoli, Italy
| | - Lizelle A Piater
- Research Centre for Plant Metabolomics, Department of Biochemistry, University of Johannesburg, Auckland Park, 2006, South Africa
| | - Antonio Molinaro
- Department of Chemical Sciences, University of Napoli Federico II, Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126, Napoli, Italy
| | - Ian A Dubery
- Research Centre for Plant Metabolomics, Department of Biochemistry, University of Johannesburg, Auckland Park, 2006, South Africa.
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19
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Fuchs D, Tang X, Johnsson AK, Dahlén SE, Hamberg M, Wheelock CE. Eosinophils synthesize trihydroxyoctadecenoic acids (TriHOMEs) via a 15-lipoxygenase dependent process. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158611. [PMID: 31918007 DOI: 10.1016/j.bbalip.2020.158611] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 12/04/2019] [Accepted: 12/31/2019] [Indexed: 11/17/2022]
Abstract
Trihydroxyoctadecenoic acids (TriHOMEs) are linoleic acid-derived lipid mediators reported to be dysregulated in obstructive lung disease. In contrast to many other oxylipins, TriHOME biosynthesis in humans is still poorly understood. The association of TriHOMEs with inflammation prompted the current investigation into the ability of human granulocytes to synthesize the 16 different 9,10,13-TriHOME and 9,12,13-TriHOME isomers and of the TriHOME biosynthetic pathway. Following incubation with linoleic acid, eosinophils and (to a lesser extent) the mast cell line LAD2, but not neutrophils, formed TriHOMEs. Stereochemical analysis revealed that TriHOMEs produced by eosinophils predominantly evidenced the 13(S) configuration, suggesting 15-lipoxygenase (15-LOX)-mediated synthesis. TriHOME formation was blocked following incubation with the 15-LOX inhibitor BLX-3887 and was shown to be largely independent of soluble epoxide hydrolase and cytochrome P450 activities. TriHOME synthesis was abolished when linoleic acid was replaced with 13-HODE, but increased in incubations with 13-HpODE, indicating the intermediary role of epoxy alcohols in TriHOME formation. In contrast to eosinophils, LAD2 cells formed TriHOMEs having predominantly the 13(R) configuration, demonstrating that there are multiple synthetic routes for TriHOME formation. These findings provide for the first-time insight into the synthetic route of TriHOMEs in humans and expand our understanding of their formation in inflammatory diseases.
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Affiliation(s)
- David Fuchs
- Division of Physiological Chemistry 2, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Xiao Tang
- Division of Physiological Chemistry 2, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Anna-Karin Johnsson
- Unit of Lung and Allergy Research, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Sven-Erik Dahlén
- Unit of Lung and Allergy Research, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Mats Hamberg
- Division of Physiological Chemistry 2, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Craig E Wheelock
- Division of Physiological Chemistry 2, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden.
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Mareya CR, Tugizimana F, Piater LA, Madala NE, Steenkamp PA, Dubery IA. Untargeted Metabolomics Reveal Defensome-Related Metabolic Reprogramming in Sorghum bicolor against Infection by Burkholderia andropogonis. Metabolites 2019; 9:metabo9010008. [PMID: 30609758 PMCID: PMC6359421 DOI: 10.3390/metabo9010008] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 12/21/2018] [Accepted: 12/24/2018] [Indexed: 12/27/2022] Open
Abstract
Burkholderia andropogonis is the causal agent of bacterial leaf stripe, one of the three major bacterial diseases affecting Sorghum bicolor. However, the biochemical aspects of the pathophysiological host responses are not well understood. An untargeted metabolomics approach was designed to understand molecular mechanisms underlying S. bicolor⁻B. andropogonis interactions. At the 4-leaf stage, two sorghum cultivars (NS 5511 and NS 5655) differing in disease tolerance, were infected with B. andropogonis and the metabolic changes monitored over time. The NS 5511 cultivar displayed delayed signs of wilting and lesion progression compared to the NS 5655 cultivar, indicative of enhanced resistance. The metabolomics results identified statistically significant metabolites as biomarkers associated with the sorghum defence. These include the phytohormones salicylic acid, jasmonic acid, and zeatin. Moreover, metabolic reprogramming in an array of chemically diverse metabolites that span a wide range of metabolic pathways was associated with the defence response. Signatory biomarkers included aromatic amino acids, shikimic acid, metabolites from the phenylpropanoid and flavonoid pathways, as well as fatty acids. Enhanced synthesis and accumulation of apigenin and derivatives thereof was a prominent feature of the altered metabolomes. The analyses revealed an intricate and dynamic network of the sorghum defence arsenal towards B. andropogonis in establishing an enhanced defensive capacity in support of resistance and disease suppression. The results pave the way for future analysis of the biosynthesis of signatory biomarkers and regulation of relevant metabolic pathways in sorghum.
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Affiliation(s)
- Charity R Mareya
- Centre for Plant Metabolomics Research, Department of Biochemistry, University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa.
| | - Fidele Tugizimana
- Centre for Plant Metabolomics Research, Department of Biochemistry, University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa.
| | - Lizelle A Piater
- Centre for Plant Metabolomics Research, Department of Biochemistry, University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa.
| | - Ntakadzeni E Madala
- Centre for Plant Metabolomics Research, Department of Biochemistry, University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa.
| | - Paul A Steenkamp
- Centre for Plant Metabolomics Research, Department of Biochemistry, University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa.
| | - Ian A Dubery
- Centre for Plant Metabolomics Research, Department of Biochemistry, University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa.
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21
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Dogra V, Kim C. Singlet Oxygen Metabolism: From Genesis to Signaling. FRONTIERS IN PLANT SCIENCE 2019; 10:1640. [PMID: 31969891 PMCID: PMC6960194 DOI: 10.3389/fpls.2019.01640] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 11/21/2019] [Indexed: 05/03/2023]
Abstract
Singlet oxygen (1O2) is an excited state of molecular oxygen with an electron spin shift in the molecular orbitals, which is extremely unstable and highly reactive. In plants, 1O2 is primarily generated as a byproduct of photosynthesis in the photosystem II reaction center (PSII RC) and the light-harvesting antenna complex (LHC) in the grana core (GC). This occurs upon the absorption of light energy when the excited chlorophyll molecules in the PSII transfer the excess energy to molecular oxygen, thereby generating 1O2. As a potent oxidant, 1O2 promotes oxidative damage. However, at sub-lethal levels, it initiates chloroplast-to-nucleus retrograde signaling to contribute to plant stress responses, including acclimation and cell death. The thylakoid membranes comprise two spatially separated 1O2 sensors: β-carotene localized in the PSII RC in the GC and the nuclear-encoded chloroplast protein EXECUTER1 (EX1) residing in the non-appressed grana margin (GM). Finding EX1 in the GM suggests the existence of an additional source of 1O2 in the GM and the presence of two distinct 1O2-signaling pathways. In this review, we mainly discuss the genesis and impact of 1O2 in plant physiology.
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22
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Zhu J, Wang X, Guo L, Xu Q, Zhao S, Li F, Yan X, Liu S, Wei C. Characterization and Alternative Splicing Profiles of the Lipoxygenase Gene Family in Tea Plant (Camellia sinensis). PLANT & CELL PHYSIOLOGY 2018; 59:1765-1781. [PMID: 29726968 PMCID: PMC6135896 DOI: 10.1093/pcp/pcy091] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 04/28/2018] [Indexed: 05/22/2023]
Abstract
Oxylipins, including jasmonic acid (JA) and volatiles, are important for signaling in plants, and these are formed by the lipoxygenase (LOX) enzyme family. There is a large gap in understanding of the underlying molecular basis of their roles in tea plants. Here, we identified 11 CsLOX genes from the tea plant (Camellia sinensis), and characterized their phylogeny, gene structure and protein features into three subclasses. We then examined their enzymatic activities, LOX expression and alternative splicing of transcripts during development and in response to abiotic or biotic stresses in tea plants. In vitro expressed protein assays showed that the CsLOX2, 3 and 9 enzymatically function to produce 9/13-HPOT, 13-HPOT and 9-HPOT, respectively. CsLOX2 and CsLOX9 green fluorescent protein (GFP) fusion proteins localized to chloroplasts and the cytoplasm, respectively. RNA sequencing, quantitative reverse transcription-PCR and Northern blot analysis suggested that CsLOX5, 6 and 9 were predominantly expressed in seeds, flowers and roots, respectively. CsLOX2, 3, 4, 6 and 7 were up-regulated after attack by the insect Ectropis oblique, while CsLOX1 was induced after infection with the pathogen Glomerella cingulata. CsLOX3, 7 and 10 were up-regulated by JA but not ABA or salicylic acid. Long-term cold stress down-regulated CsLOX expression while a short duration of cold induced the expression of CsLOX1, 6 and 7. Alternatively spliced transcripts of six CsLOX genes were dynamically regulated through time and varied in relative abundances under the investigated stresses; we propose a mechanism of competing or compensating regulation between isoforms. This study improves our understanding of evolution of LOXs and regulation of their diverse functions in plants.
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Affiliation(s)
- Junyan Zhu
- State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Processing, Ministry of Agriculture, Anhui Agricultural University, West 130 Changjiang Road, Hefei, Anhui, PR China
| | - Xuewen Wang
- State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Processing, Ministry of Agriculture, Anhui Agricultural University, West 130 Changjiang Road, Hefei, Anhui, PR China
- Department of Genetics, University of Georgia, Athens, GA, USA
| | - Lingxiao Guo
- State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Processing, Ministry of Agriculture, Anhui Agricultural University, West 130 Changjiang Road, Hefei, Anhui, PR China
| | - Qingshan Xu
- State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Processing, Ministry of Agriculture, Anhui Agricultural University, West 130 Changjiang Road, Hefei, Anhui, PR China
| | - Shiqi Zhao
- State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Processing, Ministry of Agriculture, Anhui Agricultural University, West 130 Changjiang Road, Hefei, Anhui, PR China
| | - Fangdong Li
- State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Processing, Ministry of Agriculture, Anhui Agricultural University, West 130 Changjiang Road, Hefei, Anhui, PR China
| | - Xiaomei Yan
- State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Processing, Ministry of Agriculture, Anhui Agricultural University, West 130 Changjiang Road, Hefei, Anhui, PR China
| | - Shengrui Liu
- State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Processing, Ministry of Agriculture, Anhui Agricultural University, West 130 Changjiang Road, Hefei, Anhui, PR China
| | - Chaoling Wei
- State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Processing, Ministry of Agriculture, Anhui Agricultural University, West 130 Changjiang Road, Hefei, Anhui, PR China
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23
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Fuchs D, Hamberg M, Sköld CM, Wheelock ÅM, Wheelock CE. An LC-MS/MS workflow to characterize 16 regio- and stereoisomeric trihydroxyoctadecenoic acids. J Lipid Res 2018; 59:2025-2033. [PMID: 30065010 DOI: 10.1194/jlr.d087429] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/28/2018] [Indexed: 12/15/2022] Open
Abstract
Trihydroxyoctadecenoic acids (TriHOMEs) are linoleic acid-derived oxylipins with potential physiological relevance in inflammatory processes as well as in maintaining an intact skin barrier. Due to the high number of possible TriHOME isomers with only subtle differences in their physicochemical properties, the stereochemical analysis is challenging and usually involves a series of laborious analytical procedures. We herein report a straightforward analytical workflow that includes reversed-phase ultra-HPLC-MS/MS for rapid quantification of 9,10,13- and 9,12,13-TriHOME diastereomers and a chiral LC-MS method capable of resolving all sixteen 9,10,13-TriHOME and 9,12,13-TriHOME regio- and stereoisomers. We characterized the workflow (accuracy, 98-120%; precision, coefficient of variation ≤6.1%; limit of detection, 90-98 fg on column; linearity, R2 = 0.998) and used it for stereochemical profiling of TriHOMEs in bronchoalveolar lavage fluid (BALF) of individuals with chronic obstructive pulmonary disease (COPD). All TriHOME isomers were increased in the BALF of COPD patients relative to that of smokers (P ≤ 0.06). In both COPD patients and smokers with normal lung function, TriHOMEs with the 13(S) configuration were enantiomerically enriched relative to the corresponding 13(R) isomers, suggesting at least partial enzymatic control of TriHOME synthesis. This method will be useful for understanding the synthetic sources of these compounds and for elucidating disease mechanisms.
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Affiliation(s)
- David Fuchs
- Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics Karolinska Institutet, Stockholm, Sweden
| | - Mats Hamberg
- Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics Karolinska Institutet, Stockholm, Sweden
| | - C Magnus Sköld
- Respiratory Medicine Unit, Department of Medicine Solna and Center for Molecular Medicine (CMM), Karolinska Institutet, Stockholm, Sweden.,Lung-Allergy Clinic, Karolinska University Hospital Solna, Stockholm, Sweden
| | - Åsa M Wheelock
- Respiratory Medicine Unit, Department of Medicine Solna and Center for Molecular Medicine (CMM), Karolinska Institutet, Stockholm, Sweden
| | - Craig E Wheelock
- Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics Karolinska Institutet, Stockholm, Sweden
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24
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d'Ippolito G, Nuzzo G, Sardo A, Manzo E, Gallo C, Fontana A. Lipoxygenases and Lipoxygenase Products in Marine Diatoms. Methods Enzymol 2018; 605:69-100. [PMID: 29909839 DOI: 10.1016/bs.mie.2018.02.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Marine diatoms negatively affect reproduction and later larval development of dominant zooplankton grazers such as copepods, thereby lowering the recruitment of the next generations of these small crustaceans that are a major food source for larval fish species. The phenomenon has been explained in terms of chemical defense due to grazer-induced synthesis of oxylipins, lipoxygenase-derived oxygenated fatty acid derivatives. Since this first report, studies about diatom oxylipins have multiplied and broadened toward other aspects concerning bloom dynamics, cell growth, and cell differentiation. Diatom oxylipins embrace a number of diverse structures that are recognized as chemical signals in ecological and physiological processes in many other organisms. In diatoms, the most studied examples include polyunsaturated aldehydes (PUAs) and nonvolatile oxylipins (NVOs). The purpose of this chapter is to provide the analytical tools to deal with identification, analysis and biosynthesis of these compounds. Emphasis is given to identification of the enzymatic steps and characterization of the species-specific lipoxygenases even in absence of the availability of molecular information.
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Affiliation(s)
- Giuliana d'Ippolito
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy
| | - Genoveffa Nuzzo
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy
| | - Angela Sardo
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy
| | - Emiliano Manzo
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy
| | - Carmela Gallo
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy
| | - Angelo Fontana
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy.
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25
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Guodong R, Xiaoxia L, Weiwei Z, Wenjun W, Jianguo Z. Metabolomics reveals variation and correlation among different tissues of olive ( Olea europaea L.). Biol Open 2017; 6:1317-1323. [PMID: 28760735 PMCID: PMC5612235 DOI: 10.1242/bio.025585] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Metabolites in olives are associated with nutritional value and physiological properties. However, comprehensive information regarding the olive metabolome is limited. In this study, we identified 226 metabolites from three different tissues of olive using a non-targeted metabolomic profiling approach, of which 76 named metabolites were confirmed. Further statistical analysis revealed that these 76 metabolites covered different types of primary metabolism and some of the secondary metabolism pathways. One-way analysis of variance (ANOVA) statistical assay was performed to calculate the variations within the detected metabolites, and levels of 65 metabolites were differentially expressed in different samples. Hierarchical cluster analysis (HCA) dendrograms showed variations among different tissues that were similar to the metabolite profiles observed in new leaves and fruit. Additionally, 5776 metabolite-metabolite correlations were detected by a Pearson correlation coefficient approach. Screening of the calculated correlations revealed 3136, 3025, and 5184 were determined to metabolites and had significant correlations in three different combinations, respectively. This work provides the first comprehensive metabolomic of olive, which will provide new insights into understanding the olive metabolism, and potentially help advance studies in olive metabolic engineering. Summary: This work provides the first comprehensive metabolomic of olive, which will provide new insights into understanding the olive metabolism and potentially help advance studies in olive metabolic engineering.
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Affiliation(s)
- Rao Guodong
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China.,Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China.,Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Liu Xiaoxia
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Zha Weiwei
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Wu Wenjun
- Gansu Academy of Forestry, Lanzhou 730030, China
| | - Zhang Jianguo
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China .,Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China.,Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
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26
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Lim GH, Singhal R, Kachroo A, Kachroo P. Fatty Acid- and Lipid-Mediated Signaling in Plant Defense. ANNUAL REVIEW OF PHYTOPATHOLOGY 2017; 55:505-536. [PMID: 28777926 DOI: 10.1146/annurev-phyto-080516-035406] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Fatty acids and lipids, which are major and essential constituents of all plant cells, not only provide structural integrity and energy for various metabolic processes but can also function as signal transduction mediators. Lipids and fatty acids can act as both intracellular and extracellular signals. In addition, cyclic and acyclic products generated during fatty acid metabolism can also function as important chemical signals. This review summarizes the biosynthesis of fatty acids and lipids and their involvement in pathogen defense.
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Affiliation(s)
- Gah-Hyun Lim
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546;
| | - Richa Singhal
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546;
| | - Aardra Kachroo
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546;
| | - Pradeep Kachroo
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546;
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27
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Rao G, Sui J, Zhang J. Metabolomics reveals significant variations in metabolites and correlations regarding the maturation of walnuts (Juglans regia L.). Biol Open 2016; 5:829-36. [PMID: 27215321 PMCID: PMC4920193 DOI: 10.1242/bio.017863] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The content of walnut metabolites is related to its nutritive value and physiological characteristics, however, comprehensive information concerning the metabolome of walnut kernels is limited. In this study we analyzed the metabolites of walnut kernels at five developmental stages from filling to ripening using GC-MS-based untargeted metabolomics; of a total 252 peaks identified, 85 metabolites were positively identified. Further statistical analysis revealed that these 85 metabolites covered different types of metabolism pathways. PCA scores revealed that the metabolic compositions of the embryo are different at each stage, while the metabolic composition of the endotesta could not be significantly separated into distinct groups. Additionally, 7225 metabolite-metabolite correlations were detected in walnut kernel by a Pearson correlation coefficient approach; during screening of the calculated correlations, 463 and 1047 were determined to be significant with r2≥0.49 and had a false discovery rate (FDR) ≤0.05 in endotesta and embryo, respectively. This work provides the first comprehensive metabolomic study of walnut kernels and reveals that most of the carbohydrate and protein-derived carbon was transferred into other compounds, such as fatty acids, during the maturation of walnuts, which may potentially provide the basis for further studies on walnut kernel metabolism. Summary: This work provides a comprehensive metabolomic study of walnut kernels and reveals most of the carbohydrate and protein-derived carbons were transferred into other compounds during the maturation of walnuts.
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Affiliation(s)
- Guodong Rao
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, Republic of China Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, Republic of China Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, Republic of China
| | - Jinkai Sui
- Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, Republic of China
| | - Jianguo Zhang
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, Republic of China Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, Republic of China Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, Republic of China
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28
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Morcillo RJL, Navarrete MIT, Bote JAO, Monguio SP, García-Garrido JM. Suppression of allene oxide synthase 3 in potato increases degree of arbuscular mycorrhizal fungal colonization. JOURNAL OF PLANT PHYSIOLOGY 2016; 190:15-25. [PMID: 26629611 DOI: 10.1016/j.jplph.2015.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 10/29/2015] [Accepted: 11/11/2015] [Indexed: 06/05/2023]
Abstract
Arbuscular mycorrhizal (AM) is a mutually beneficial interaction among higher plants and soil fungi of the phylum Glomeromycota. Numerous studies have pointed that jasmonic acid plays an important role in the development of the intraradical fungus. This compound belongs to a group of biologically active compounds known as oxylipins which are derived from the oxidative metabolism of polyunsaturated fatty acids. Studies of the regulatory role played by oxylipins in AM colonization have generally focused on jasmonates, while few studies exist on the 9-LOX pathway of oxylipins during AM formation. Here, the cDNA of Allene oxide synthase 3 (AOS3), a key enzyme in the 9-LOX pathway, was used in the RNA interference (RNAi) system to transform potato plants in order to suppress its expression. Results show increases in AOS3 gene expression and 9-LOX products in roots of wild type potato mycorrhizal plants. The suppression of AOS3 gene expression increases the percentage of root with mycorrhizal colonization at early stages of AM formation. AOS3 RNA interference lead to an induction of LOXA and 13-LOX genes, a reduction in AOS3 derived 9-LOX oxylipin compounds and an increase in jasmonic acid content, suggesting compensation between 9 and 13-LOX pathways. The results in a whole support the hypothesis of a regulatory role for the 9-LOX oxylipin pathway during mycorrhization.
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Affiliation(s)
- Rafael Jorge León Morcillo
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (EEZ), CSIC, Calle Profesor Albareda n°1, 18008 Granada, Spain
| | - María Isabel Tamayo Navarrete
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (EEZ), CSIC, Calle Profesor Albareda n°1, 18008 Granada, Spain
| | - Juan Antonio Ocampo Bote
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (EEZ), CSIC, Calle Profesor Albareda n°1, 18008 Granada, Spain
| | - Salomé Prat Monguio
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología (CNB), CSIC, Calle Darwin n° 3, 28049 Madrid, Spain
| | - José Manuel García-Garrido
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (EEZ), CSIC, Calle Profesor Albareda n°1, 18008 Granada, Spain.
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29
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Zuluaga AP, Vega-Arreguín JC, Fei Z, Matas AJ, Patev S, Fry WE, Rose JKC. Analysis of the tomato leaf transcriptome during successive hemibiotrophic stages of a compatible interaction with the oomycete pathogen Phytophthora infestans. MOLECULAR PLANT PATHOLOGY 2016; 17:42-54. [PMID: 25808779 PMCID: PMC6638369 DOI: 10.1111/mpp.12260] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The infection of plants by hemibiotrophic pathogens involves a complex and highly regulated transition from an initial biotrophic, asymptomatic stage to a later necrotrophic state, characterized by cell death. Little is known about how this transition is regulated, and there are conflicting views regarding the significance of the plant hormones jasmonic acid (JA) and salicylic acid (SA) in the different phases of infection. To provide a broad view of the hemibiotrophic infection process from the plant perspective, we surveyed the transcriptome of tomato (Solanum lycopersicum) during a compatible interaction with the hemibiotrophic oomycete Phytophthora infestans during three infection stages: biotrophic, the transition from biotrophy to necrotrophy, and the necrotrophic phase. Nearly 10 000 genes corresponding to proteins in approximately 400 biochemical pathways showed differential transcript abundance during the three infection stages, revealing a major reorganization of plant metabolism, including major changes in source-sink relations, as well as secondary metabolites. In addition, more than 100 putative resistance genes and pattern recognition receptor genes were induced, and both JA and SA levels and associated signalling pathways showed dynamic changes during the infection time course. The biotrophic phase was characterized by the induction of many defence systems, which were either insufficient, evaded or suppressed by the pathogen.
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Affiliation(s)
- Andrea P Zuluaga
- Section of Plant Pathology and Plant Microbe Biology, School of Integrative Plant Science, Cornell University, Ithaca, NY, 14853, USA
| | - Julio C Vega-Arreguín
- Section of Plant Pathology and Plant Microbe Biology, School of Integrative Plant Science, Cornell University, Ithaca, NY, 14853, USA
- Laboratory of Agrigenomics, Universidad Nacional Autónoma de México (UNAM), ENES-León, 37684, Guanajuato, Mexico
| | - Zhangjun Fei
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY, 14853, USA
- USDA Robert W. Holley Center for Agriculture and Health, Ithaca, NY, 14853, USA
| | - Antonio J Matas
- Departamento de Biología Vegetal, Campus de Teatinos, Universidad de Málaga, 29071, Málaga, Spain
- Section of Plant Biology, School of Integrative Plant Science, Cornell University, Ithaca, NY, 14853, USA
| | - Sean Patev
- Section of Plant Pathology and Plant Microbe Biology, School of Integrative Plant Science, Cornell University, Ithaca, NY, 14853, USA
| | - William E Fry
- Section of Plant Pathology and Plant Microbe Biology, School of Integrative Plant Science, Cornell University, Ithaca, NY, 14853, USA
| | - Jocelyn K C Rose
- Section of Plant Biology, School of Integrative Plant Science, Cornell University, Ithaca, NY, 14853, USA
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30
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Hanano A, Almousally I, Shaban M, Moursel N, Shahadeh A, Alhajji E. Differential tissue accumulation of 2,3,7,8-Tetrachlorinated dibenzo-p-dioxin in Arabidopsis thaliana affects plant chronology, lipid metabolism and seed yield. BMC PLANT BIOLOGY 2015; 15:193. [PMID: 26260741 PMCID: PMC4531507 DOI: 10.1186/s12870-015-0583-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 07/29/2015] [Indexed: 05/04/2023]
Abstract
BACKGROUND Dioxins are one of the most toxic groups of persistent organic pollutants. Their biotransmission through the food chain constitutes a potential risk for human health. Plants as principal actors in the food chain can play a determinant role in removing dioxins from the environment. Due to the lack of data on dioxin/plant research, this study sets out to determine few responsive reactions adopted by Arabidopsis plant towards 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), the most toxic congener of dioxins. RESULTS Using a high resolution gas chromatography/mass spectrometry, we demonstrated that Arabidopsis plant uptakes TCDD by the roots and accumulates it in the vegetative parts in a tissue-specific manner. TCDD mainly accumulated in rosette leaves and mature seeds and less in stem, flowers and immature siliques. Moreover, we observed that plants exposed to high doses of TCDD exhibited a delay in flowering and yielded fewer seeds of a reduced oil content with a low vitality. A particular focus on the plant fatty acid metabolism showed that TCDD caused a significant reduction in C18-unsaturated fatty acid level in plant tissues. Simultaneously, TCDD induced the expression of 9-LOX and 13-LOX genes and the formation of their corresponding hydroperoxides, 9- and 13-HPOD as well as 9- or 13-HPOT, derived from linoleic and linolenic acids, respectively. CONCLUSIONS The current work highlights a side of toxicological effects resulting in the administration of 2,3,7,8-TCDD on the Arabidopsis plant. Similarly to animals, it seems that plants may accumulate TCDD in their lipids by involving few of the FA-metabolizing enzymes for sculpting a specific oxylipins "signature" typified to plant TCDD-tolerance. Together, our results uncover novel responses of Arabidopsis to dioxin, possibly emerging to overcome its toxicity.
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Affiliation(s)
- Abdulsamie Hanano
- Atomic Energy Commission of Syria (AECS), B.P. Box 6091, Damascus, Syria.
- Department of Molecular Biology and Biotechnology, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syria.
| | - Ibrahem Almousally
- Atomic Energy Commission of Syria (AECS), B.P. Box 6091, Damascus, Syria.
- Department of Molecular Biology and Biotechnology, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syria.
| | - Mouhnad Shaban
- Atomic Energy Commission of Syria (AECS), B.P. Box 6091, Damascus, Syria.
- Department of Molecular Biology and Biotechnology, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syria.
| | - Nour Moursel
- Atomic Energy Commission of Syria (AECS), B.P. Box 6091, Damascus, Syria.
- Department of Molecular Biology and Biotechnology, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syria.
| | - AbdAlbaset Shahadeh
- Atomic Energy Commission of Syria (AECS), B.P. Box 6091, Damascus, Syria.
- Department of Chemistry, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syria.
| | - Eskander Alhajji
- Atomic Energy Commission of Syria (AECS), B.P. Box 6091, Damascus, Syria.
- Department of Protection and Safety, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syria.
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Robinson SM, Bostock RM. β-glucans and eicosapolyenoic acids as MAMPs in plant-oomycete interactions: past and present. FRONTIERS IN PLANT SCIENCE 2015; 5:797. [PMID: 25628639 PMCID: PMC4292309 DOI: 10.3389/fpls.2014.00797] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 12/22/2014] [Indexed: 05/20/2023]
Abstract
Branched β-1,3-glucans and the eicosapolyenoic acids (EP) are among the best characterized oomycete elicitors that trigger innate immune responses in plants. These elicitors were identified over three decades ago, and they were useful in the study of the sequence of physiological, biochemical and molecular events that induce resistance in plants. However, in spite of the cross-kingdom parallels where these molecules are well-characterized as immune system modulators in animals, their perception and modes of action in plants remains obscure. Oomycetes are among the most important plant pathogens, responsible for diseases that devastate crops, ornamentals, and tree species worldwide. With the recent interest and advances in our understanding of innate immunity in plants, and the redefining of many of the classical elicitors as microbe-associated molecular patterns (MAMPs), it seems timely and important to reexamine β-glucans and EP using contemporary approaches. In this review, we highlight early studies of β-glucans and EP, discuss their roles as evolutionarily conserved signals, and consider their action in relation to current models of MAMP-triggered immunity.
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Affiliation(s)
| | - Richard M. Bostock
- Department of Plant Pathology, University of CaliforniaDavis, Davis, CA, USA
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Hartley SE, Eschen R, Horwood JM, Gange AC, Hill EM. Infection by a foliar endophyte elicits novel arabidopside-based plant defence reactions in its host, Cirsium arvense. THE NEW PHYTOLOGIST 2015; 205:816-27. [PMID: 25266631 DOI: 10.1111/nph.13067] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 08/12/2014] [Indexed: 05/23/2023]
Abstract
Endophytic fungi live asymptomatically within plants. They are usually regarded as nonpathogenic or even mutualistic, but whether plants respond antagonistically to their presence remains unclear, particularly in the little-studied associations between endophytes and nongraminoid herbaceous plants. We investigated the effects of the endophyte Chaetomium cochlioides on leaf chemistry in Cirsium arvense. Plants were sprayed with spores; leaf material from both subsequent new growth and the sprayed leaves was analysed 2 wk later. Infection frequency was 91% and 63% for sprayed and new growth, respectively, indicating that C. cochlioides rapidly infects new foliage. Metabolomic analyses revealed marked changes in leaf chemistry with infection, especially in new growth. Changes in several novel oxylipin metabolites were detected, including arabidopsides reported here for the first time in a plant species other than Arabidopsis thaliana, and a jasmonate-containing galactolipid. The production of these metabolites in response to endophyte presence, particularly in newly infected foliage, suggests that endophytes elicit similar chemical responses in plants to those usually produced following wounding, herbivory and pathogen invasion. Whether endophytes benefit their hosts may depend on a complex series of chemically mediated interactions between the plant, the endophyte, other microbial colonists and natural enemies.
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Affiliation(s)
- Susan E Hartley
- Department of Biology, University of York, Heslington, York, YO10 5DD, UK
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Blée E, Boachon B, Burcklen M, Le Guédard M, Hanano A, Heintz D, Ehlting J, Herrfurth C, Feussner I, Bessoule JJ. The reductase activity of the Arabidopsis caleosin RESPONSIVE TO DESSICATION20 mediates gibberellin-dependent flowering time, abscisic acid sensitivity, and tolerance to oxidative stress. PLANT PHYSIOLOGY 2014; 166:109-24. [PMID: 25056921 PMCID: PMC4149700 DOI: 10.1104/pp.114.245316] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 07/22/2014] [Indexed: 05/20/2023]
Abstract
Contrasting with the wealth of information available on the multiple roles of jasmonates in plant development and defense, knowledge about the functions and the biosynthesis of hydroxylated oxylipins remains scarce. By expressing the caleosin RESPONSIVE TO DESSICATION20 (RD20) in Saccharomyces cerevisiae, we show that the recombinant protein possesses an unusual peroxygenase activity with restricted specificity toward hydroperoxides of unsaturated fatty acid. Accordingly, Arabidopsis (Arabidopsis thaliana) plants overexpressing RD20 accumulate the product 13-hydroxy-9,11,15-octadecatrienoic acid, a linolenate-derived hydroxide. These plants exhibit elevated levels of reactive oxygen species (ROS) associated with early gibberellin-dependent flowering and abscisic acid hypersensitivity at seed germination. These phenotypes are dependent on the presence of active RD20, since they are abolished in the rd20 null mutant and in lines overexpressing RD20, in which peroxygenase was inactivated by a point mutation of a catalytic histidine residue. RD20 also confers tolerance against stress induced by Paraquat, Rose Bengal, heavy metal, and the synthetic auxins 1-naphthaleneacetic acid and 2,4-dichlorophenoxyacetic acid. Under oxidative stress, 13-hydroxy-9,11,15-octadecatrienoic acid still accumulates in RD20-overexpressing lines, but this lipid oxidation is associated with reduced ROS levels, minor cell death, and delayed floral transition. A model is discussed where the interplay between fatty acid hydroxides generated by RD20 and ROS is counteracted by ethylene during development in unstressed environments.
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Affiliation(s)
- Elizabeth Blée
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357-Université de Strasbourg, 67083 Strasbourg cedex, France (E.B., B.B., M.B., A.H., D.H., J.E.)Laboratoire de Biogénèse Membranaire, Bâtiment A3-Institut National de la Recherche Agronomique Bordeaux Aquitaine, 33140 Villenave d'Ornon, France (M.L.G., J.-J.B.); andGeorg-August-University, Albrecht-von-Haller Institute, Department of Plant Biochemistry, 37077 Goettingen, Germany (C.H., I.F.)
| | - Benoît Boachon
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357-Université de Strasbourg, 67083 Strasbourg cedex, France (E.B., B.B., M.B., A.H., D.H., J.E.)Laboratoire de Biogénèse Membranaire, Bâtiment A3-Institut National de la Recherche Agronomique Bordeaux Aquitaine, 33140 Villenave d'Ornon, France (M.L.G., J.-J.B.); andGeorg-August-University, Albrecht-von-Haller Institute, Department of Plant Biochemistry, 37077 Goettingen, Germany (C.H., I.F.)
| | - Michel Burcklen
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357-Université de Strasbourg, 67083 Strasbourg cedex, France (E.B., B.B., M.B., A.H., D.H., J.E.)Laboratoire de Biogénèse Membranaire, Bâtiment A3-Institut National de la Recherche Agronomique Bordeaux Aquitaine, 33140 Villenave d'Ornon, France (M.L.G., J.-J.B.); andGeorg-August-University, Albrecht-von-Haller Institute, Department of Plant Biochemistry, 37077 Goettingen, Germany (C.H., I.F.)
| | - Marina Le Guédard
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357-Université de Strasbourg, 67083 Strasbourg cedex, France (E.B., B.B., M.B., A.H., D.H., J.E.)Laboratoire de Biogénèse Membranaire, Bâtiment A3-Institut National de la Recherche Agronomique Bordeaux Aquitaine, 33140 Villenave d'Ornon, France (M.L.G., J.-J.B.); andGeorg-August-University, Albrecht-von-Haller Institute, Department of Plant Biochemistry, 37077 Goettingen, Germany (C.H., I.F.)
| | - Abdulsamie Hanano
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357-Université de Strasbourg, 67083 Strasbourg cedex, France (E.B., B.B., M.B., A.H., D.H., J.E.)Laboratoire de Biogénèse Membranaire, Bâtiment A3-Institut National de la Recherche Agronomique Bordeaux Aquitaine, 33140 Villenave d'Ornon, France (M.L.G., J.-J.B.); andGeorg-August-University, Albrecht-von-Haller Institute, Department of Plant Biochemistry, 37077 Goettingen, Germany (C.H., I.F.)
| | - Dimitri Heintz
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357-Université de Strasbourg, 67083 Strasbourg cedex, France (E.B., B.B., M.B., A.H., D.H., J.E.)Laboratoire de Biogénèse Membranaire, Bâtiment A3-Institut National de la Recherche Agronomique Bordeaux Aquitaine, 33140 Villenave d'Ornon, France (M.L.G., J.-J.B.); andGeorg-August-University, Albrecht-von-Haller Institute, Department of Plant Biochemistry, 37077 Goettingen, Germany (C.H., I.F.)
| | - Jürgen Ehlting
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357-Université de Strasbourg, 67083 Strasbourg cedex, France (E.B., B.B., M.B., A.H., D.H., J.E.)Laboratoire de Biogénèse Membranaire, Bâtiment A3-Institut National de la Recherche Agronomique Bordeaux Aquitaine, 33140 Villenave d'Ornon, France (M.L.G., J.-J.B.); andGeorg-August-University, Albrecht-von-Haller Institute, Department of Plant Biochemistry, 37077 Goettingen, Germany (C.H., I.F.)
| | - Cornelia Herrfurth
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357-Université de Strasbourg, 67083 Strasbourg cedex, France (E.B., B.B., M.B., A.H., D.H., J.E.)Laboratoire de Biogénèse Membranaire, Bâtiment A3-Institut National de la Recherche Agronomique Bordeaux Aquitaine, 33140 Villenave d'Ornon, France (M.L.G., J.-J.B.); andGeorg-August-University, Albrecht-von-Haller Institute, Department of Plant Biochemistry, 37077 Goettingen, Germany (C.H., I.F.)
| | - Ivo Feussner
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357-Université de Strasbourg, 67083 Strasbourg cedex, France (E.B., B.B., M.B., A.H., D.H., J.E.)Laboratoire de Biogénèse Membranaire, Bâtiment A3-Institut National de la Recherche Agronomique Bordeaux Aquitaine, 33140 Villenave d'Ornon, France (M.L.G., J.-J.B.); andGeorg-August-University, Albrecht-von-Haller Institute, Department of Plant Biochemistry, 37077 Goettingen, Germany (C.H., I.F.)
| | - Jean-Jacques Bessoule
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357-Université de Strasbourg, 67083 Strasbourg cedex, France (E.B., B.B., M.B., A.H., D.H., J.E.)Laboratoire de Biogénèse Membranaire, Bâtiment A3-Institut National de la Recherche Agronomique Bordeaux Aquitaine, 33140 Villenave d'Ornon, France (M.L.G., J.-J.B.); andGeorg-August-University, Albrecht-von-Haller Institute, Department of Plant Biochemistry, 37077 Goettingen, Germany (C.H., I.F.)
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Schuck S, Kallenbach M, Baldwin IT, Bonaventure G. The Nicotiana attenuata GLA1 lipase controls the accumulation of Phytophthora parasitica-induced oxylipins and defensive secondary metabolites. PLANT, CELL & ENVIRONMENT 2014; 37:1703-15. [PMID: 24450863 PMCID: PMC4190502 DOI: 10.1111/pce.12281] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 01/10/2014] [Accepted: 01/12/2014] [Indexed: 05/24/2023]
Abstract
Nicotiana attenuata plants silenced in the expression of GLYCEROLIPASE A1 (ir-gla1 plants) are compromised in the herbivore- and wound-induced accumulation of jasmonic acid (JA). However, these plants accumulate wild-type (WT) levels of JA and divinyl-ethers during Phytophthora parasitica infection. By profiling oxylipin-enriched fractions with targeted and untargeted liquid chromatography-tandem time-of-flight mass spectrometry approaches, we demonstrate that the accumulation of 9-hydroxy-10E,12Z-octadecadienoic acid (9-OH-18:2) and additional C18 and C19 oxylipins is reduced by ca. 20-fold in P. parasitica-infected ir-gla1 leaves compared with WT. This reduced accumulation of oxylipins was accompanied by a reduced accumulation of unsaturated free fatty acids and specific lysolipid species. Untargeted metabolic profiling of total leaf extracts showed that 87 metabolites accumulated differentially in leaves of P. parasitica-infected ir-gla1 plants with glycerolipids, hydroxylated-diterpene glycosides and phenylpropanoid derivatives accounting together for ca. 20% of these 87 metabolites. Thus, P. parasitica-induced oxylipins may participate in the regulation of metabolic changes during infection. Together, the results demonstrate that GLA1 plays a distinct role in the production of oxylipins during biotic stress responses, supplying substrates for 9-OH-18:2 and additional C18 and C19 oxylipin formation during P. parasitica infection, whereas supplying substrates for the biogenesis of JA during herbivory and mechanical wounding.
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Affiliation(s)
- Stefan Schuck
- Max Planck Institute of Chemical Ecology, Department of Molecular Ecology, Hans Knöll Str. 8, D-07745 Jena, Germany
| | - Mario Kallenbach
- Max Planck Institute of Chemical Ecology, Department of Molecular Ecology, Hans Knöll Str. 8, D-07745 Jena, Germany
| | - Ian T. Baldwin
- Max Planck Institute of Chemical Ecology, Department of Molecular Ecology, Hans Knöll Str. 8, D-07745 Jena, Germany
| | - Gustavo Bonaventure
- Max Planck Institute of Chemical Ecology, Department of Molecular Ecology, Hans Knöll Str. 8, D-07745 Jena, Germany
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Kongrit D, Jisaka M, Kobayasi K, Nishigaichi Y, Nishimura K, Nagaya T, Yokota K. Molecular Cloning, Functional Expression, and Tissue Distribution of a Potato Sprout Allene Oxide Synthase Involved in a 9-Lipoxygenase Pathway. Biosci Biotechnol Biochem 2014; 70:2160-8. [PMID: 16960383 DOI: 10.1271/bbb.60120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Potato (Solanum tuberosum) plants are rich in 9-lipoxygenase, which converts linoleic acid and alpha-linolenic acid to 9S-hydroperoxy-10E,12Z-octadecadienoic acid (9-HPOD) and 9S-hydroperoxy-10E,12Z,15Z-octadecatrienoic acid (9-HPOT) respectively. The allene oxide synthase (AOS) involved in 9-HPOD/9-HPOT metabolism in potato, however, has not been characterized in detail. We cloned a cDNA encoding a novel AOS from potato sprouts by reverse transcriptase-PCR based on a partial sequence in the EST database. This AOS was successfully expressed in the yeast Pichia pastoris, and purified using Ni-NTA resin. The recombinant enzyme metabolized 9-HPOD, 9-HPOT, 13-HPOD, and 13-HPOT with reaction efficiencies of 2.5 x 10(7), 1.0 x 10(7), 2.5 x 10(6), and 7.6 x 10(6) M(-1) s(-1) respectively. The alpha-ketol formed from 9-HPOD was composed mainly of the 9R-enatimomer (90%). Besides sprouts, the mRNA of this AOS was detected in buds, flowers, and stems, but not in leaves, tubers, or roots of mature plants, suggesting that this enzyme has a tissue-specific function.
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Affiliation(s)
- Darika Kongrit
- Division of Applied Resources Chemistry, Course of Bioresources Science, The United Graduate School of Agricultural Sciences, Tottori University, Tottori, Japan
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Mariutto M, Fauconnier ML, Ongena M, Laloux M, Wathelet JP, du Jardin P, Thonart P, Dommes J. Reprogramming of fatty acid and oxylipin synthesis in rhizobacteria-induced systemic resistance in tomato. PLANT MOLECULAR BIOLOGY 2014; 84:455-467. [PMID: 24146221 DOI: 10.1007/s11103-013-0144-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 10/07/2013] [Indexed: 06/02/2023]
Abstract
The rhizobacterium Pseudomonas putida BTP1 stimulates induced systemic resistance (ISR) in tomato. A previous work showed that the resistance is associated in leaves with the induction of the first enzyme of the oxylipin pathway, the lipoxygenase (LOX), leading to a faster accumulation of its product, the free 13-hydroperoxy octadecatrienoic acid (13-HPOT), 2 days after Botrytis cinerea inoculation. In the present study, we further investigated the stimulation of the oxylipin pathway: metabolites and enzymes of the pathway were analyzed to understand the fate of the 13-HPOT in ISR. Actually the stimulation began upstream the LOX: free linolenic acid accumulated faster in P. putida BTP1-treated plants than in control. Downstream, the LOX products 13-fatty acid hydroperoxides esterified to galactolipids and phospholipids were more abundant in bacterized plants than in control before infection. These metabolites could constitute a pool that will be used after pathogen attack to produce free fungitoxic metabolites through the action of phospholipase A2, which is enhanced in bacterized plants upon infection. Enzymatic branches which can use as substrate the fatty acid hydroperoxides were differentially regulated in bacterized plants in comparison to control plants, so as to lead to the accumulation of the most fungitoxic compounds against B. cinerea. Our study, which is the first to demonstrate the accumulation of an esterified defense metabolite during rhizobacteria-mediated induced systemic resistance, showed that the oxylipin pathway is differentially regulated. It suggests that this allows the plant to prepare to a future infection, and to respond faster and in a more effective way to B. cinerea invasion.
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Affiliation(s)
- Martin Mariutto
- Laboratory of Plant Molecular Biology and Biotechnology, Department of Life Sciences, Faculty of Sciences, University of Liège, Boulevard du Rectorat, 27, Liege, Belgium
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Kumari P, Reddy R, Jha B. Quantification of selected endogenous hydroxy-oxylipins from tropical marine macroalgae. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2014; 16:74-87. [PMID: 24052492 DOI: 10.1007/s10126-013-9533-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 07/08/2013] [Indexed: 05/23/2023]
Abstract
The present study investigated the contents of hydroxy-oxylipins hydroxyoctadecadienoic acids (HODEs), hydroxyoctadecatrienoic acids (HOTrEs), and hydroxyeicosatetraenoic acids (HETEs) in 40 macroalgae belonging to the Chlorophyceae, Rhodophyceae and, Phaeophyceae. The hydroxy-oxylipin content was low and ranged from 0.14 ± 0.012 ng/g (Codium dwarkense) to 8,161.9 ± 253 ng/g (Chaetomorpha linum) among the Chlorophyceae, 345.4 ± 56.8 ng/g (Scytosiphon lomentaria) to 2,574.5 ± 155.5 ng/g (Stoechospermum marginatum) among the Phaeophyceae, and 19.4 ± 2.2 ng/g (Laurencia cruciata) to 1,753.1 ± 268.2 ng/g in Gracilaria corticata v. folifera) among the Rhodophyceae on fresh weight basis (p ≤ 0.01). The concentrations of C18-oxylipins were greater than C20-oxylipins in all the investigated macroalgae, except forUlva linza, Codium sursum, Dictyopteris deliculata, S. marginatum, Sargassum tenerrimum, Gracilaria spp. (except G. textorii), Rhodymenia sonderi, and Odonthalia veravalensis.The macroalgal species rich in HODEs, HOTrEs, and HETEs were segregated using principal component analysis. The red macroalgae showed the highest contents of HETEs, followed by brown and green macroalgae in consistent with their PUFA profiles. The relative contents of isomeric forms of oxylipins displayed the species-specific positional selectivity of lipoxygenase (LOX) enzyme in macroalgae. All the species exhibited 13-LOX specificity for linoleic acid analogous of higher plants, while 21 out of 40 species showed 9-LOX selectivity for the oxygenation of α-linolenic acid. No trend was observed for the oxygenation of arachidonic acid in macroalgae, except for in the Halymeniales, Ceramiales (except L. cruciata), and Corallinales. This study infers that LOX products, octadecanoids and eicosanoids, described in macroalgal taxa were similar to those of higher plants and mammals, respectively, and thus can be utilized as an alternative source of chemically synthesized oxylipin analogues in therapeutics, cosmetics, and nutritional oil supplements.
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Affiliation(s)
- Puja Kumari
- Discipline of Marine Biotechnology and Ecology, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar, 364002, Gujarat, India
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Draffehn AM, Li L, Krezdorn N, Ding J, Lübeck J, Strahwald J, Muktar MS, Walkemeier B, Rotter B, Gebhardt C. Comparative transcript profiling by SuperSAGE identifies novel candidate genes for controlling potato quantitative resistance to late blight not compromised by late maturity. FRONTIERS IN PLANT SCIENCE 2013; 4:423. [PMID: 24294214 PMCID: PMC3827546 DOI: 10.3389/fpls.2013.00423] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 10/05/2013] [Indexed: 05/23/2023]
Abstract
Resistance to pathogens is essential for survival of wild and cultivated plants. Pathogen susceptibility causes major losses of crop yield and quality. Durable field resistance combined with high yield and other superior agronomic characters are therefore, important objectives in every crop breeding program. Precision and efficacy of resistance breeding can be enhanced by molecular diagnostic tools, which result from knowledge of the molecular basis of resistance and susceptibility. Breeding uses resistance conferred by single R genes and polygenic quantitative resistance. The latter is partial but considered more durable. Molecular mechanisms of plant pathogen interactions are elucidated mainly in experimental systems involving single R genes, whereas most genes important for quantitative resistance in crops like potato are unknown. Quantitative resistance of potato to Phytophthora infestans causing late blight is often compromised by late plant maturity, a negative agronomic character. Our objective was to identify candidate genes for quantitative resistance to late blight not compromised by late plant maturity. We used diagnostic DNA-markers to select plants with different field levels of maturity corrected resistance (MCR) to late blight and compared their leaf transcriptomes before and after infection with P. infestans using SuperSAGE (serial analysis of gene expression) technology and next generation sequencing. We identified 2034 transcripts up or down regulated upon infection, including a homolog of the kiwi fruit allergen kiwellin. 806 transcripts showed differential expression between groups of genotypes with contrasting MCR levels. The observed expression patterns suggest that MCR is in part controlled by differential transcript levels in uninfected plants. Functional annotation suggests that, besides biotic and abiotic stress responses, general cellular processes such as photosynthesis, protein biosynthesis, and degradation play a role in MCR.
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Affiliation(s)
- Astrid M. Draffehn
- Department Plant Breeding and Genetics, Max Planck Institute for Plant Breeding ResearchCologne, Germany
| | - Li Li
- Department Plant Breeding and Genetics, Max Planck Institute for Plant Breeding ResearchCologne, Germany
| | | | - Jia Ding
- Department Plant Breeding and Genetics, Max Planck Institute for Plant Breeding ResearchCologne, Germany
| | - Jens Lübeck
- Saka-Pflanzenzucht GmbH & Co. KGWindeby, Germany
| | | | - Meki S. Muktar
- Department Plant Breeding and Genetics, Max Planck Institute for Plant Breeding ResearchCologne, Germany
| | - Birgit Walkemeier
- Department Plant Breeding and Genetics, Max Planck Institute for Plant Breeding ResearchCologne, Germany
| | | | - Christiane Gebhardt
- Department Plant Breeding and Genetics, Max Planck Institute for Plant Breeding ResearchCologne, Germany
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Cho K, Kim Y, Wi SJ, Seo JB, Kwon J, Chung JH, Park KY, Nam MH. Metabolic survey of defense responses to a compatible hemibiotroph, Phytophthora parasitica var. nicotianae, in ethylene signaling-impaired tobacco. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:8477-89. [PMID: 23866065 DOI: 10.1021/jf401785w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Reactive oxygen species (ROS) and ethylene play an important role in determining the resistance or susceptibility of plants to pathogen attack. A previous study of the response of tobacco cultivar ( Nicotiana tabacum L. cv. Wisconsin 38) to a compatible hemibiotroph, Phytophthora parasitica var. nicotianae (Ppn) showed that biphasic bursts of ROS and ethylene are positively associated with disease severity. The levels of ethylene and ROS might influence the susceptibility of plants to pathogens, with changing levels of metabolite related to disease resistance or susceptibility. In this study, to obtain more detailed information on the interaction of ROS and ethylene signaling related to resistance and/or susceptibility of plants to pathogen, Ppn-induced metabolic profiles from wild type (WT) and ethylene signaling-impaired transgenic plants that expressed Ein3 antisense (Ein3-AS) were compared using ultraperformance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-QTOF-MS). Nonredundant mass ions (576 in ESI+ mode and 336 in ESI- mode) were selected, and 56 mass ions were identified on the basis of their accurate mass ions and MS/MS spectra. Two-way hierarchical clustering analysis of the selected mass ions revealed that nicotine and phenylpropanoid-polyamine conjugates, such as caffeoyl-dihydrocaffeoyl-spermidine, dicaffeoyl-spermidine, caffeoyl-feruloyl-spermidine, and two bis(dihydrocaffeoyl)-spermine isomers, and their intermediates, such as arginine and putrecine, were present at lower levels in Ein3-AS transgenic plants during Ppn interaction than in WT, whereas galactolipid and oxidized free fatty acid levels were higher in Ein3-AS transgenic plants. Taken together, these results reveal a function for ethylene signaling in tobacco defense responses during Ppn interaction.
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Affiliation(s)
- Kyoungwon Cho
- Seoul Center, Korea Basic Science Institute (KBSI) , Seoul 136-713, Republic of Korea
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40
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Saubeau G, Goulitquer S, Barloy D, Potin P, Andrivon D, Val F. Differential induction of oxylipin pathway in potato and tobacco cells by bacterial and oomycete elicitors. PLANT CELL REPORTS 2013; 32:579-89. [PMID: 23479199 DOI: 10.1007/s00299-012-1377-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 11/19/2012] [Accepted: 12/12/2012] [Indexed: 05/08/2023]
Abstract
KEY MESSAGE Potato and tobacco cells are differentially suited to study oxylipin pathway and elicitor-induced responses. Synthesis of oxylipins via the lipoxygenase (LOX) pathway provides plant cells with an important class of signaling molecules, related to plant stress responses and innate immunity. The aim of this study was to evaluate the induction of LOX pathway in tobacco and potato cells induced by a concentrated culture filtrate (CCF) from Phytophthora infestans and lipopolysaccharide (LPS) from Pectobacterium atrosepticum. Oxylipin activation was evaluated by the measurement of LOX activity and metabolite quantification. The basal levels of oxylipins and fatty acids showed that potato cells contained higher amounts of linoleic (LA), linolenic (LnA) and stearic acids than tobacco cells. The major oxylipin in potato cells, 9(S),10(S),11(R)-trihydroxy-12(Z),15(Z)-octadecadienoic acid (9,10,11-THOD), was not detected in tobacco cells. CCF induced a sharp increase of LA and LnA at 8 h in tobacco cells. In contrast they decreased in potato cells. In CCF-treated tobacco cells, colneleic acid increased up to 24 h, colnelenic acid and 9(S)-hydroxyoctadecatrienoic acid (9(S)-HOT) increased up to 16 h. In potato cells, only colneleic acid increased slightly until 16 h. A differential induction of LOX activity was measured in both cells treated by CCF. With LPS treatment, only 9,10,11-THOD accumulation was significantly induced at 16 h in potato cells. Fatty acids were constant in tobacco but decreased in potato cells over the studied time period. These results showed that the two elicitors were differently perceived by the two Solanaceae and that oxylipin pathway is strongly induced in tobacco with the CCF. They also revealed that elicitor-induced responses depended on both cell culture and elicitor.
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Thomas CP, Boeglin WE, Garcia-Diaz Y, O'Donnell VB, Brash AR. Steric analysis of epoxyalcohol and trihydroxy derivatives of 9-hydroperoxy-linoleic acid from hematin and enzymatic synthesis. Chem Phys Lipids 2013; 167-168:21-32. [PMID: 23352713 DOI: 10.1016/j.chemphyslip.2013.01.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 12/06/2012] [Accepted: 01/06/2013] [Indexed: 11/19/2022]
Abstract
We characterize the allylic epoxyalcohols and their trihydroxy hydrolysis products generated from 9R- and 9S-hydroperoxy-octadecenoic acid (HPODE) under non-enzymatic conditions, reaction with hematin and subsequent acid hydrolysis, and enzymatic conditions, incubation with Beta vulgaris containing a hydroperoxide isomerase and epoxide hydrolase. The products were resolved by HPLC and the regio and stereo-chemistry of the transformations were determined through a combination of (1)H NMR and GC-MS analysis of dimethoxypropane derivatives. Four trihydroxy isomers were identified upon mild acid hydrolysis of 9S,10S-trans-epoxy-11E-13S-hydroxyoctadecenoate: 9S,10R,13S, 9S,12R,13S, 9S,10S,13S and 9S,12S,13S-trihydroxy-octadecenoic acids, in the ratio 40:26:22:12. We also identified a prominent δ-ketol rearrangement product from the hydrolysis as mainly the 9-hydroxy-10E-13-oxo isomer. Short incubation (5 min) of 9R- and 9S-HPODE with B. vulgaris extract yielded the 9R- and 9S-hydroxy-10E-12R,13S-cis-epoxy products respectively. Longer incubation (60 min) gave one specific hydrolysis product via epoxide hydrolase, the 9R/S,12S,13S-trihydroxyoctadecenoate. These studies provide a practical approach for the isolation and characterization of allylic epoxy alcohol and trihydroxy products using a combination of HPLC, GC-MS and (1)H NMR.
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Affiliation(s)
- Christopher P Thomas
- Department of Pharmacology, Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, TN 37232-6602, USA
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Nam KH, Yoshihara T. Interactions among LOX metabolites regulate temperature-mediated flower bud formation in morning glory (Pharbitis nil). JOURNAL OF PLANT PHYSIOLOGY 2012; 169:1815-1820. [PMID: 22902207 DOI: 10.1016/j.jplph.2012.07.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 07/27/2012] [Accepted: 07/27/2012] [Indexed: 06/01/2023]
Abstract
We examined the relationship between temperature (15-35°C) and flower induction as it is influenced by linolenic acid (LA) cascade products, lipoxygenase (LOX; EC 1.13.11.12), allene oxide synthase (AOS; EC 4.2.1.92), and allene oxide cyclase (AOC; EC 5.3.99.6) generated in morning glory (Pharbitis nil Choisy). The maximum amount of LOX protein was detected when plants were grown at 30°C, whereas endogenous AOS and AOC proteins were markedly accumulated at 15°C. Although both test levels of 9(S)- and 13(S)-hydroperoxy linolenic acid (HPOT) showed similar temperature dependencies, reflecting the profile of LOX, the relative amount of 13(S)-HPOT was much higher than that of 9(S)-HPOT, regardless of temperature regime. This implied a faster reaction pathway to 9,10-α-ketol octadecadienoic acid (KODA) in the LA cascade. In the 13(S)-HPOT pathway, the highest level of endogenous jasmonic acid (JA) was observed at 15°C. Our results suggest that at a high temperature (30°C), 9(S)-HPOT may be readily metabolized into KODA to promote flower bud formation. By contrast, at a low temperature, high levels of AOS and AOC result in an accumulation of JA that inhibits this developmental process. Accordingly, depending on the growing temperature, flower bud formation in P. nil is possibly regulated by the interactions among LOX metabolites, with KODA serving as a promoter and JA as an inhibitor.
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Affiliation(s)
- Kyong-Hee Nam
- Laboratory of Bio-organic Chemistry, Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kitaku, Sapporo 060-8589, Japan
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Liu X, Li F, Tang J, Wang W, Zhang F, Wang G, Chu J, Yan C, Wang T, Chu C, Li C. Activation of the jasmonic acid pathway by depletion of the hydroperoxide lyase OsHPL3 reveals crosstalk between the HPL and AOS branches of the oxylipin pathway in rice. PLoS One 2012; 7:e50089. [PMID: 23209649 PMCID: PMC3510209 DOI: 10.1371/journal.pone.0050089] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Accepted: 10/15/2012] [Indexed: 01/31/2023] Open
Abstract
The allene oxide synthase (AOS) and hydroperoxide lyase (HPL) branches of the oxylipin pathway, which underlie the production of jasmonates and aldehydes, respectively, function in plant responses to a range of stresses. Regulatory crosstalk has been proposed to exist between these two signaling branches; however, there is no direct evidence of this. Here, we identified and characterized a jasmonic acid (JA) overproduction mutant, cea62, by screening a rice T-DNA insertion mutant library for lineages that constitutively express the AOS gene. Map-based cloning was used to identify the underlying gene as hydroperoxide lyase OsHPL3. HPL3 expression and the enzyme activity of its product, (E)-2-hexenal, were depleted in the cea62 mutant, which resulted in the dramatic overproduction of JA, the activation of JA signaling, and the emergence of the lesion mimic phenotype. A time-course analysis of lesion formation and of the induction of defense responsive genes in the cea62 mutant revealed that the activation of JA biosynthesis and signaling in cea62 was regulated in a developmental manner, as was OsHPL3 activity in the wild-type plant. Microarray analysis showed that the JA-governed defense response was greatly activated in cea62 and this plant exhibited enhanced resistance to the T1 strain of the bacterial blight pathogen Xanthomonasoryzaepvoryzae (Xoo). The wounding response was attenuated in cea62 plants during the early stages of development, but partially recovered when JA levels were elevated during the later stages. In contrast, the wounding response was not altered during the different developmental stages of wild-type plants. These findings suggest that these two branches of the oxylipin pathway exhibit crosstalk with regards to biosynthesis and signaling and cooperate with each other to function in diverse stress responses.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Chengcai Chu
- State Key Laboratory of Plant Genomics, National Centre for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Chuanyou Li
- State Key Laboratory of Plant Genomics, National Centre for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, People's Republic of China
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Schuck S, Camehl I, Gilardoni PA, Oelmueller R, Baldwin IT, Bonaventure G. HSPRO controls early Nicotiana attenuata seedling growth during interaction with the fungus Piriformospora indica. PLANT PHYSIOLOGY 2012; 160:929-43. [PMID: 22892352 PMCID: PMC3461566 DOI: 10.1104/pp.112.203976] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Accepted: 08/14/2012] [Indexed: 05/10/2023]
Abstract
In a previous study aimed at identifying regulators of Nicotiana attenuata responses against chewing insects, a 26-nucleotide tag matching the HSPRO (ORTHOLOG OF SUGAR BEET Hs1(pro)(-)(1)) gene was found to be strongly induced after simulated herbivory (Gilardoni et al., 2010). Here we characterized the function of HSPRO during biotic interactions in transgenic N. attenuata plants silenced in its expression (ir-hspro). In wild-type plants, HSPRO expression was not only induced during simulated herbivory but also when leaves were inoculated with Pseudomonas syringae pv tomato DC3000 and roots with the growth-promoting fungus Piriformospora indica. Reduced HSPRO expression did not affect the regulation of direct defenses against Manduca sexta herbivory or P. syringae pv tomato DC3000 infection rates. However, reduced HSPRO expression positively influenced early seedling growth during interaction with P. indica; fungus-colonized ir-hspro seedlings increased their fresh biomass by 30% compared with the wild type. Grafting experiments demonstrated that reduced HSPRO expression in roots was sufficient to induce differential growth promotion in both roots and shoots. This effect was accompanied by changes in the expression of 417 genes in colonized roots, most of which were metabolic genes. The lack of major differences in the metabolic profiles of ir-hspro and wild-type colonized roots (as analyzed by liquid chromatography time-of-flight mass spectrometry) suggested that accelerated metabolic rates were involved. We conclude that HSPRO participates in a whole-plant change in growth physiology when seedlings interact with P. indica.
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Affiliation(s)
- Stefan Schuck
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena 07745, Germany (S.S., P.A.G., I.T.B., G.B.); and Institute of General Botany and Plant Physiology, Friedrich-Schiller University of Jena, D–07743 Jena, Germany (I.C., R.O.)
| | - Iris Camehl
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena 07745, Germany (S.S., P.A.G., I.T.B., G.B.); and Institute of General Botany and Plant Physiology, Friedrich-Schiller University of Jena, D–07743 Jena, Germany (I.C., R.O.)
| | - Paola A. Gilardoni
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena 07745, Germany (S.S., P.A.G., I.T.B., G.B.); and Institute of General Botany and Plant Physiology, Friedrich-Schiller University of Jena, D–07743 Jena, Germany (I.C., R.O.)
| | - Ralf Oelmueller
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena 07745, Germany (S.S., P.A.G., I.T.B., G.B.); and Institute of General Botany and Plant Physiology, Friedrich-Schiller University of Jena, D–07743 Jena, Germany (I.C., R.O.)
| | - Ian T. Baldwin
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena 07745, Germany (S.S., P.A.G., I.T.B., G.B.); and Institute of General Botany and Plant Physiology, Friedrich-Schiller University of Jena, D–07743 Jena, Germany (I.C., R.O.)
| | - Gustavo Bonaventure
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena 07745, Germany (S.S., P.A.G., I.T.B., G.B.); and Institute of General Botany and Plant Physiology, Friedrich-Schiller University of Jena, D–07743 Jena, Germany (I.C., R.O.)
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Ghanem ME, Ghars MA, Frettinger P, Pérez-Alfocea F, Lutts S, Wathelet JP, du Jardin P, Fauconnier ML. Organ-dependent oxylipin signature in leaves and roots of salinized tomato plants (Solanum lycopersicum). JOURNAL OF PLANT PHYSIOLOGY 2012; 169:1090-101. [PMID: 22664263 DOI: 10.1016/j.jplph.2012.03.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2011] [Revised: 03/18/2012] [Accepted: 03/21/2012] [Indexed: 05/04/2023]
Abstract
Oxylipins have been extensively studied in plant defense mechanisms or as signal molecules. Depending on the stress origin (e.g. wounding, insect, pathogen), and also on the plant species or organ, a specific oxylipin signature can be generated. Salt stress is frequently associated with secondary stress such as oxidative damage. Little is known about the damage caused to lipids under salt stress conditions, especially with respect to oxylipins. In order to determine if an organ-specific oxylipin signature could be observed during salt stress, tomato (Solanum lycopersicum cv. Money Maker) plants were submitted to salt stress (100 mM of NaCl) for a 30-d period. A complete oxylipin profiling and LOX related-gene expression measurement were achieved in leaves and roots. As expected, salt stress provoked premature senescence in leaves, as revealed by a decrease in photosystem II efficiency (F(v)/F(m) ratio) and sodium accumulation in leaves. In roots, a significant decrease in several oxylipins (9- and 13-hydro(pero)xy linole(n)ic acids, keto and divinyl ether derivatives) was initiated at day 5 and intensified at day 21 after salt treatment, whereas jasmonic acid content increased. In leaves, the main changes in oxylipins were observed later (at day 30), with an increase in some 9- and 13-hydro(pero)xy linole(n)ic acids and a decrease in some keto-derivatives and in jasmonic acid. Oxylipin enantiomeric characterization revealed that almost all compounds were formed enzymatically, and therefore a massive auto-oxidation of lipids that can be encountered in abscission processes can be excluded here.
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Affiliation(s)
- Michel Edmond Ghanem
- Groupe de Recherche en Physiologie Végétale-GRPV, Earth and Life Institute-Agronomy-ELI-A, Université Catholique de Louvain, 5 Bte 13 Place Croix du Sud, B-1348 Louvain-La-Neuve, Belgium
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Eschen-Lippold L, Lübken T, Smolka U, Rosahl S. Characterization of potato plants with reduced StSYR1 expression. PLANT SIGNALING & BEHAVIOR 2012; 7:559-562. [PMID: 22516814 PMCID: PMC3419019 DOI: 10.4161/psb.19866] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Vesicle fusion processes in plants are important for both development and stress responses. Transgenic potato plants with reduced expression of SYNTAXIN-RELATED1 (StSYR1), a gene encoding the potato homolog of Arabidopsis PENETRATION1 (AtPEN1), display spontaneous necrosis and chlorosis at later stages of development. In accordance with this developmental defect, tuber number, weight and overall yield are significantly reduced in StSYR1-RNAi lines. Enhanced resistance of StSYR1-RNAi plants to Phytophthora infestans, the causal agent of late blight disease of potato, correlates with enhanced levels of salicylic acid, whereas levels of 12-oxophytodienoic acid and jasmonic acid are unaltered. Cultured cells of StSYR1-RNAi lines secrete at least two compounds which are not detectable in the supernatant of control cells, suggesting an involvement of StSYR1 in secretion processes to the apoplast.
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Eschen-Lippold L, Landgraf R, Smolka U, Schulze S, Heilmann M, Heilmann I, Hause G, Rosahl S. Activation of defense against Phytophthora infestans in potato by down-regulation of syntaxin gene expression. THE NEW PHYTOLOGIST 2012; 193:985-996. [PMID: 22243492 DOI: 10.1111/j.1469-8137.2011.04024.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The oomycete Phytophthora infestans is the causal agent of late blight, the most devastating disease of potato. The importance of vesicle fusion processes and callose deposition for defense of potato against Phytophthora infestans was analyzed. Transgenic plants were generated, which express RNA interference constructs targeted against plasma membrane-localized SYNTAXIN-RELATED 1 (StSYR1) and SOLUBLE N-ETHYLMALEIMIDE-SENSITIVE FACTOR ADAPTOR PROTEIN 33 (StSNAP33), the potato homologs of Arabidopsis AtSYP121 and AtSNAP33, respectively. Phenotypically, transgenic plants grew normally, but showed spontaneous necrosis and chlorosis formation at later stages. In response to infection with Phytophthora infestans, increased resistance of StSYR1-RNAi plants, but not StSNAP33-RNAi plants, was observed. This increased resistance correlated with the constitutive accumulation of salicylic acid and PR1 transcripts. Aberrant callose deposition in Phytophthora infestans-infected StSYR1-RNAi plants coincided with decreased papilla formation at penetration sites. Resistance against the necrotrophic fungus Botrytis cinerea was not significantly altered. Infiltration experiments with bacterial solutions of Agrobacterium tumefaciens and Escherichia coli revealed a hypersensitive phenotype of both types of RNAi lines. The enhanced defense status and the reduced growth of Phytophthora infestans on StSYR1-RNAi plants suggest an involvement of syntaxins in secretory defense responses of potato and, in particular, in the formation of callose-containing papillae.
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Affiliation(s)
- Lennart Eschen-Lippold
- Department of Stress and Developmental Biology, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Ramona Landgraf
- Department of Stress and Developmental Biology, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Ulrike Smolka
- Department of Stress and Developmental Biology, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Sebastian Schulze
- Institute of Genetics, Martin Luther University Halle-Wittenberg, Weinbergweg 10, D-06120 Halle (Saale), Germany
| | - Mareike Heilmann
- Department of Cellular Biochemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Str. 3, D-06120 Halle (Saale), Germany
| | - Ingo Heilmann
- Department of Cellular Biochemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Str. 3, D-06120 Halle (Saale), Germany
| | - Gerd Hause
- Martin Luther University Halle-Wittenberg, Biocenter, Weinbergweg 22, D-06120 Halle (Saale), Germany
| | - Sabine Rosahl
- Department of Stress and Developmental Biology, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
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Demchenko K, Zdyb A, Feussner I, Pawlowski K. Analysis of the subcellular localisation of lipoxygenase in legume and actinorhizal nodules. PLANT BIOLOGY (STUTTGART, GERMANY) 2012; 14:56-63. [PMID: 21973171 DOI: 10.1111/j.1438-8677.2011.00480.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Plant lipoxygenases (LOXs; EC 1.13.11.12) catalyse the oxygenation of polyunsaturated fatty acids, linoleic (18:2) and α-linolenic acid (18:3(n-3)) and are involved in processes such as stress responses and development. Depending on the regio-specificity of a LOX, the incorporation of molecular oxygen leads to formation of 9- or 13-fatty acid hydroperoxides, which are used by LOX itself as well as by members of at least six different enzyme families to form a series of biologically active molecules, collectively called oxylipins. The best characterised oxylipins are the jasmonates: jasmonic acid (JA) and its isoleucine conjugate that are signalling compounds in vegetative and propagative plant development. In several types of nitrogen-fixing root nodules, LOX expression and/or activity is induced during nodule development. Allene oxide cyclase (AOC), a committed enzyme of the JA biosynthetic pathway, has been shown to localise to plastids of nodules of one legume and two actinorhizal plants, Medicago truncatula, Datisca glomerata and Casuarina glauca, respectively. Using an antibody that recognises several types of LOX interspecifically, LOX protein levels were compared in roots and nodules of these plants, showing no significant differences and no obvious nodule-specific isoforms. A comparison of the cell-specific localisation of LOXs and AOC led to the conclusion that (i) only cytosolic LOXs were detected although it is generally assumed that the (13S)-hydroperoxy α-linolenic acid for JA biosynthesis is produced in the plastids, and (ii) in cells of the nodule vascular tissue that contain AOC, no LOX protein could be detected.
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Affiliation(s)
- K Demchenko
- Albrecht-von-Haller Institute for Plant Sciences, Department of Plant Biochemistry, Georg-August-University Göttingen, Göttingen, Germany
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Bonaventure G, Schuck S, Baldwin IT. Revealing complexity and specificity in the activation of lipase-mediated oxylipin biosynthesis: a specific role of the Nicotiana attenuata GLA1 lipase in the activation of jasmonic acid biosynthesis in leaves and roots. PLANT, CELL & ENVIRONMENT 2011; 34:1507-20. [PMID: 21554327 DOI: 10.1111/j.1365-3040.2011.02348.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The activation of enzymatic oxylipin biosynthesis upon wounding, herbivory and pathogen attack depends on the biochemical activation of lipases that make polyunsaturated fatty acids (PUFAs) available to lipoxygenases (LOXs). The identity and number of the lipases involved in this process remain controversial and they probably differ among plant species. Analysis of transgenic Nicotiana attenuata plants (ir-gla1) stably reduced in the expression of the NaGLA1 gene showed that this plastidial glycerolipase is a major supplier of trienoic fatty acids for jasmonic acid (JA) biosynthesis in leaves and roots after wounding and simulated herbivory, but not during infection with the oomycete Phytophthora parasitica (var. nicotianae). NaGLA1 was not essential for the developmental control of JA biosynthesis in flowers and for the biosynthesis of C(6) volatiles by the hydroperoxide lyase (HPL) pathway; however, it affected the metabolism of divinyl ethers (DVEs) early during infection with P. parasitica (var. nicotianae) and the accumulation of NaDES1 and NaLOX1 mRNAs. Profiling of lysolipids by LC-MS/MS was consistent with a rapid activation of NaGLA1 and indicated that this lipase utilizes different lipid classes as substrates. The results revealed the complexity and specificity of the regulation of lipase-mediated oxylipin biosynthesis, highlighting the existence of pathway- and stimulus-specific lipases.
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Affiliation(s)
- Gustavo Bonaventure
- Department of Molecular Ecology, Max Planck Institute of Chemical Ecology, Hans Knöll Str. 8, D-07745 Jena, Germany.
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Huang FC, Schwab W. Cloning and characterization of a 9-lipoxygenase gene induced by pathogen attack from Nicotiana benthamiana for biotechnological application. BMC Biotechnol 2011; 11:30. [PMID: 21450085 PMCID: PMC3079629 DOI: 10.1186/1472-6750-11-30] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Accepted: 03/30/2011] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Plant lipoxygenases (LOXs) have been proposed to form biologically active compounds both during normal developmental stages such as germination or growth as well as during responses to environmental stress such as wounding or pathogen attack. In our previous study, we found that enzyme activity of endogenous 9-LOX in Nicotiana benthamiana was highly induced by agroinfiltration using a tobacco mosaic virus (TMV) based vector system. RESULTS A LOX gene which is expressed after treatment of the viral vectors was isolated from Nicotiana benthamiana. As the encoded LOX has a high amino acid identity to other 9-LOX proteins, the gene was named as Nb-9-LOX. It was heterologously expressed in yeast cells and its enzymatic activity was characterized. The yeast cells expressed large quantities of stable 9-LOX (0.9 U ml(-1) cell cultures) which can oxygenate linoleic acid resulting in high yields (18 μmol ml(-1) cell cultures) of hydroperoxy fatty acid. The product specificity of Nb-9-LOX was examined by incubation of linoleic acid and Nb-9-LOX in combination with a 13-hydroperoxide lyase from watermelon (Cl-13-HPL) or a 9/13-hydroperoxide lyase from melon (Cm-9/13-HPL) and by LC-MS analysis. The result showed that Nb-9-LOX possesses both 9- and 13-LOX specificity, with high predominance for the 9-LOX function. The combination of recombinant Nb-9-LOX and recombinant Cm-9/13-HPL produced large amounts of C9-aldehydes (3.3 μmol mg(-1) crude protein). The yield of C9-aldehydes from linoleic acid was 64%. CONCLUSION The yeast expressed Nb-9-LOX can be used to produce C9-aldehydes on a large scale in combination with a HPL gene with 9-HPL function, or to effectively produce 9-hydroxy-10(E),12(Z)-octadecadienoic acid in a biocatalytic process in combination with cysteine as a mild reducing agent.
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Affiliation(s)
- Fong-Chin Huang
- Technische Universität München, Biotechnology of Natural Products, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany
| | - Wilfried Schwab
- Technische Universität München, Biotechnology of Natural Products, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany
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