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Manoilenko S, Dippe M, Fuchs T, Eisenschmidt-Bönn D, Ziegler J, Bauer AK, Wessjohann LA. Enzymatic one-step synthesis of natural 2-pyrones and new-to-nature derivatives from coenzyme A esters. J Biotechnol 2024; 388:72-82. [PMID: 38616039 DOI: 10.1016/j.jbiotec.2024.04.006] [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: 01/13/2024] [Revised: 03/28/2024] [Accepted: 04/11/2024] [Indexed: 04/16/2024]
Abstract
The 2-pyrone moiety is present in a wide range of structurally diverse natural products with various biological activities. The plant biosynthetic routes towards these compounds mainly depend on the activity of either type III polyketide synthase-like 2-pyrone synthases or hydroxylating 2-oxoglutarate dependent dioxygenases. In the present study, the substrate specificity of these enzymes is investigated by a systematic screening using both natural and artificial substrates with the aims of efficiently forming (new) products and understanding the underlying catalytic mechanisms. In this framework, we focused on the in vitro functional characterization of a 2-pyrone synthase Gh2PS2 from Gerbera x hybrida and two dioxygenases AtF6'H1 and AtF6'H2 from Arabidopsis thaliana using a set of twenty aromatic and aliphatic CoA esters as substrates. UHPLC-ESI-HRMSn based analyses of reaction intermediates and products revealed a broad substrate specificity of the enzymes, enabling the facile "green" synthesis of this important class of natural products and derivatives in a one-step/one-pot reaction in aqueous environment without the need for halogenated or metal reagents and protective groups. Using protein modeling and substrate docking we identified amino acid residues that seem to be important for the observed product scope.
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Affiliation(s)
- Svitlana Manoilenko
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, Halle 06120, Germany
| | - Martin Dippe
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, Halle 06120, Germany.
| | - Tristan Fuchs
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, Halle 06120, Germany
| | - Daniela Eisenschmidt-Bönn
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, Halle 06120, Germany
| | - Jörg Ziegler
- Department of Molecular Signal Processing, Leibniz Institute of Plant Biochemistry, Weinberg 3, Halle 06120, Germany
| | - Anne-Katrin Bauer
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, Halle 06120, Germany
| | - Ludger A Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, Halle 06120, Germany.
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2
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He Z, Xu Y, Jiang L, Liu C, Sun J, Li Y, Huang Y, Ma X, Li Y. Four new glycosides isolated from Gerbera delavayi Franch. Nat Prod Res 2024:1-6. [PMID: 38299977 DOI: 10.1080/14786419.2024.2306487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 01/10/2024] [Indexed: 02/02/2024]
Abstract
Phytochemical investigation of the whole plant of Gerbera delavayi afforded four new glycosides including three coumarin glycosides, Gerbelavinside A (1), Gerbelavinside B (2) and Gerbelavinside C (3) and one acetophenone glycoside, Gerbelavinside F (4). The structures of isolated compounds were elucidated by analysis of 1D and 2D NMR, HR-ESI-MS, acid hydrolysis, as well as comparing with the literature. The isolated compounds were examined the effects of nitric oxide (NO) production inhibition in lipopolysaccharide (LPS)-induced RAW264.7 macrophage cells, and Gerbelavinside C presented a certain inhibitory activity.
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Affiliation(s)
- Zhilong He
- School of Basic Medical Sciences, State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Provincial Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Guizhou Medical University, Guiyang, China
- Department of Pharmacy, Bijie Medical College, Bijie, China
| | - Yingjie Xu
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Provincial Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Guizhou Medical University, Guiyang, China
- School of Pharmacy, Guizhou Medical University, Guiyang, China
| | - Li Jiang
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Provincial Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Guizhou Medical University, Guiyang, China
- Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang, China
| | - Chunhua Liu
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Provincial Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Guizhou Medical University, Guiyang, China
- Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang, China
| | - Jia Sun
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Provincial Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Guizhou Medical University, Guiyang, China
- School of Pharmacy, Guizhou Medical University, Guiyang, China
| | - Yueting Li
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Provincial Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Guizhou Medical University, Guiyang, China
- School of Pharmacy, Guizhou Medical University, Guiyang, China
| | - Yong Huang
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Provincial Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Guizhou Medical University, Guiyang, China
- Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang, China
| | - Xue Ma
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Provincial Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Guizhou Medical University, Guiyang, China
- School of Pharmacy, Guizhou Medical University, Guiyang, China
| | - Yongjun Li
- School of Basic Medical Sciences, State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Provincial Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Guizhou Medical University, Guiyang, China
- School of Pharmacy, Guizhou Medical University, Guiyang, China
- Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang, China
- National Engineering Research Center of Miao's Medicines, Guiyang, China
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3
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Yang YX, Wang Q, Huang HY, Wang ZJ. New 5-methyl-4-hydroxycoumarin polyketide derivatives from Gerbera delavayi with anti-inflammatory activity. Fitoterapia 2023; 169:105568. [PMID: 37315717 DOI: 10.1016/j.fitote.2023.105568] [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: 02/01/2023] [Revised: 06/09/2023] [Accepted: 06/11/2023] [Indexed: 06/16/2023]
Abstract
Five new 5-methyl-4-hydroxycoumarin polyketide derivatives (MPDs), delavayicoumarins A-E (1-5), were isolated from the whole plants of Gerbera delavayi. Among them, compounds 1-3 are the common monoterpene polyketide coumarins (MPCs), while 4 is a modified MPC with both the lactone ring contracted to a five-membered furan ring and a carboxyl at C-3, and 5 is a pair of unusual phenylpropanoid polyketide coumarin enantiomers (5a and 5b), featuring a phenylpropanoid unit at C-3. The planar structures were elucidated by spectroscopic methods and biosynthetic arguments, and the absolute configurations of 1-3, 5a and 5b were confirmed by calculated electronic circular dichroism (ECD) experiment. Furthermore, compounds 1-3, (+)-5 and (-)-5 were tested for the nitric oxide (NO) inhibitory activity by using lipopolysaccharide (LPS)-induced RAW 264.7 cells in vitro. The results showed that compounds 1-3, (+)-5 and (-)-5 remarkably inhibited NO production at the concentration of 10.0 μM, exhibiting that they have significant anti-inflammatory activity.
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Affiliation(s)
- Yong-Xun Yang
- School of Animal Science, Xichang University, Xichang, Sichuan 615000, PR China.
| | - Qun Wang
- Department of Phytochemistry, School of Pharmacy, Second Military Medical University, Shanghai 200433, PR China
| | - Hai-Yan Huang
- School of Natural Science, Xichang University, Xichang, Sichuan 615000, PR China
| | - Zhi-Jie Wang
- School of Animal Science, Xichang University, Xichang, Sichuan 615000, PR China
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4
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Fu Y, Song Y, van Tuyl JM, Visser RGF, Arens P. The use of a candidate gene approach to study Botrytis cinerea resistance in Gerbera hybrida. FRONTIERS IN PLANT SCIENCE 2023; 14:1100416. [PMID: 37035068 PMCID: PMC10073661 DOI: 10.3389/fpls.2023.1100416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 03/07/2023] [Indexed: 06/19/2023]
Abstract
Candidate genes (CG) for Botrytis cinerea resistance described in literature were mapped on gerbera linkage maps for which several QTL for Botrytis resistance had been found previously using a rapid, low-cost platform for SNP genotyping. In total, 29 CGs were mapped in either of two mapping populations. Four CGs were mapped within the previous identified QTL intervals and three co-localized with QTL. Two of these CGs for resistance against B. cinerea, PG1 (polygalacturonase gene) and sit (sitiens, ABA-aldehyde oxidase gene) that mapped in QTL regions for the ray floret disease resistance test were studied in detail. Virus-induced gene silencing (VIGS) was used for gene function analysis to determine the CGs' role in gerbera resistance to Botrytis. Ray florets, of which the CGs were silenced, showed a significantly delayed growth of lesions upon Botrytis infection compared to controls. Combining QTL analysis, candidate gene mapping and VIGS showed to be an useful combination to identify possible causal genes and for understanding the molecular mechanisms of Botrytis resistance in gerbera. The two genes seem to act as partial S-genes and are likely among the determining genes leading to the variation observed for B. cinerea resistance in gerbera.
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Affiliation(s)
- Yiqian Fu
- Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | - Yin Song
- Phytopathology, Wageningen University and Research, Wageningen, Netherlands
| | - Jaap M. van Tuyl
- Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | | | - Paul Arens
- Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
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Wu Z, Wang Z, Xie Y, Liu G, Shang X, Zhan N. Transcriptome and Metabolome Profiling Provide Insights into Flavonoid Synthesis in Acanthus ilicifolius Linn. Genes (Basel) 2023; 14:genes14030752. [PMID: 36981022 PMCID: PMC10048380 DOI: 10.3390/genes14030752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/15/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
Acanthus ilicifolius is an important medicinal plant in mangrove forests, which is rich in secondary metabolites with various biological activities. In this study, we used transcriptomic analysis to obtain differentially expressed genes in the flavonoid metabolic pathway and metabolomic methods to detect changes in the types and content in the flavonoid metabolic synthesis pathway. The results showed that DEGs were identified in the mature roots vs. leaves comparison (9001 up-regulated and 8910 down-regulated), mature roots vs. stems comparison (5861 up-regulated and 7374 down-regulated), and mature stems vs. leaves comparison (10,837 up-regulated and 11,903 down-regulated). Furthermore, two AiCHS genes and four AiCHI genes were up-regulated in the mature roots vs. stems of mature A. ilicifolius, and were down-regulated in mature stems vs. leaves, which were highly expressed in the A. ilicifolius stems. A total of 215 differential metabolites were found in the roots vs. leaves of mature A. ilicifolius, 173 differential metabolites in the roots vs. stems, and 228 differential metabolites in the stems vs. leaves. The metabolomic results showed that some flavonoids in A. ilicifolius stems were higher than in the roots. A total of 18 flavonoid differential metabolites were detected in the roots, stems, and leaves of mature A. ilicifolius. In mature leaves, quercetin-3-O-glucoside-7-O-rhamnoside, gossypitrin, isoquercitrin, quercetin 3,7-bis-O-β-D-glucoside, and isorhamnetin 3-O-β-(2″-O-acetyl-β-D-glucuronide) were found in a high content, while in mature roots, di-O-methylquercetin and isorhamnetin were the major compounds. The combined analysis of the metabolome and transcriptome revealed that DEGs and differential metabolites were related to flavonoid biosynthesis. This study provides a theoretical basis for analyzing the molecular mechanism of flavonoid synthesis in A. ilicifolius and provides a reference for further research and exploitation of its medicinal value.
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Affiliation(s)
- Zhihua Wu
- Research Institute of Fast-Growing Trees, Chinese Academy of Forestry, Zhanjiang 524022, China
| | - Zhen Wang
- School of Life Sciences, Langfang Normal University, Langfang 065000, China
| | - Yaojian Xie
- Research Institute of Fast-Growing Trees, Chinese Academy of Forestry, Zhanjiang 524022, China
| | - Guo Liu
- Research Institute of Fast-Growing Trees, Chinese Academy of Forestry, Zhanjiang 524022, China
| | - Xiuhua Shang
- Research Institute of Fast-Growing Trees, Chinese Academy of Forestry, Zhanjiang 524022, China
| | - Ni Zhan
- Research Institute of Fast-Growing Trees, Chinese Academy of Forestry, Zhanjiang 524022, China
- School of Life Sciences, Langfang Normal University, Langfang 065000, China
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6
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Zhu L, Pietiäinen M, Kontturi J, Turkkelin A, Elomaa P, Teeri TH. Polyketide reductases in defense-related parasorboside biosynthesis in Gerbera hybrida share processing strategies with microbial polyketide synthase systems. THE NEW PHYTOLOGIST 2022; 236:296-308. [PMID: 35719102 PMCID: PMC9541798 DOI: 10.1111/nph.18328] [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: 02/03/2022] [Accepted: 06/13/2022] [Indexed: 05/14/2023]
Abstract
Plant polyketides are well-known for their crucial functions in plants and their importance in the context of human health. They are synthesized by type III polyketide synthases (PKSs) and their final functional diversity is determined by post-PKS tailoring enzymes. Gerbera hybrida is rich in two defense-related polyketides: gerberin and parasorboside. Their synthesis is known to be initiated by GERBERA 2-PYRONE SYNTHASE 1 (G2PS1), but the polyketide reductases (PKRs) that determine their final structure have not yet been identified. We identified two PKR candidates in the pathway, GERBERA REDUCTASE 1 (GRED1) and GRED2. Gene expression and metabolite analysis of different gerbera tissues, cultivars, and transgenic gerbera plants, and in vitro enzyme assays, were performed for functional characterization of the enzymes. GRED1 and GRED2 catalyze the second reduction step in parasorboside biosynthesis. They reduce the proximal keto domain of the linear CoA bound intermediate before lactonization. We identified a crucial tailoring step in an important gerbera PKS pathway and show that plant polyketide biosynthesis shares processing strategies with fungi and bacteria. The two tailoring enzymes are recruited from the ancient sporopollenin biosynthetic pathway to a defense-related PKS pathway in gerbera. Our data provide an example of how plants recruit conserved genes to new functions in secondary metabolism that are important for environmental adaptation.
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Affiliation(s)
- Lingping Zhu
- Department of Agricultural Sciences, Viikki Plant Science CentreUniversity of HelsinkiHelsinki00014 UHFinland
| | - Milla Pietiäinen
- Department of Agricultural Sciences, Viikki Plant Science CentreUniversity of HelsinkiHelsinki00014 UHFinland
| | - Juha Kontturi
- Department of Agricultural Sciences, Viikki Plant Science CentreUniversity of HelsinkiHelsinki00014 UHFinland
| | - Anna Turkkelin
- Department of Agricultural Sciences, Viikki Plant Science CentreUniversity of HelsinkiHelsinki00014 UHFinland
| | - Paula Elomaa
- Department of Agricultural Sciences, Viikki Plant Science CentreUniversity of HelsinkiHelsinki00014 UHFinland
| | - Teemu H. Teeri
- Department of Agricultural Sciences, Viikki Plant Science CentreUniversity of HelsinkiHelsinki00014 UHFinland
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Díaz-Galiano FJ, Heinzen H, Martínez-Bueno MJ, Rajski Ł, Fernández-Alba AR. Use of high-resolution mass spectrometry for the first-time identification of gerberin as a tentative marker of the fraudulent organic production of tomatoes. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2022.104662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Mascellani A, Leiss K, Bac-Molenaar J, Malanik M, Marsik P, Hernandez Olesinski E, Tauchen J, Kloucek P, Smejkal K, Havlik J. Polyketide Derivatives in the Resistance of Gerbera hybrida to Powdery Mildew. FRONTIERS IN PLANT SCIENCE 2021; 12:790907. [PMID: 35069647 PMCID: PMC8770985 DOI: 10.3389/fpls.2021.790907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 11/29/2021] [Indexed: 05/06/2023]
Abstract
Powdery mildew is a common disease affecting the commercial production of gerbera flowers (Gerbera hybrida, Asteraceae). Some varieties show a certain degree of resistance to it. Our objective was to identify biomarkers of resistance to powdery mildew using an 1H nuclear magnetic resonance spectroscopy and chemometrics approach in a complex, fully factorial experiment to suggest a target for selection and breeding. Resistant varieties were found to differ from those that were susceptible in the metabolites of the polyketide pathway, such as gerberin, parasorboside, and gerberinside. A new compound probably involved in resistance, 5-hydroxyhexanoic acid 3-O-β-D-glucoside, was described for the first time. A decision tree model was built to distinguish resistant varieties, with an accuracy of 57.7%, sensitivity of 72%, and specificity of 44.44% in an independent test. Our results suggest the mechanism of resistance to powdery mildew in gerbera and provide a potential tool for resistance screening in breeding programs.
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Affiliation(s)
- Anna Mascellani
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia
| | - Kirsten Leiss
- Business Unit Greenhouse Horticulture, Wageningen University & Research, Bleiswijk, Netherlands
| | - Johanna Bac-Molenaar
- Business Unit Greenhouse Horticulture, Wageningen University & Research, Bleiswijk, Netherlands
| | - Milan Malanik
- Department of Natural Drugs, Faculty of Pharmacy, Masaryk University, Brno, Czechia
| | - Petr Marsik
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia
| | | | - Jan Tauchen
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia
| | - Pavel Kloucek
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia
| | - Karel Smejkal
- Department of Natural Drugs, Faculty of Pharmacy, Masaryk University, Brno, Czechia
| | - Jaroslav Havlik
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia
- *Correspondence: Jaroslav Havlik,
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Munir N, Cheng C, Xia C, Xu X, Nawaz MA, Iftikhar J, Chen Y, Lin Y, Lai Z. RNA-Seq analysis reveals an essential role of tyrosine metabolism pathway in response to root-rot infection in Gerbera hybrida. PLoS One 2019; 14:e0223519. [PMID: 31644543 PMCID: PMC6808435 DOI: 10.1371/journal.pone.0223519] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Accepted: 09/23/2019] [Indexed: 02/07/2023] Open
Abstract
Gerbera hybrida is one of the top five cut flowers across the world, it is host for the root rot causing parasite called Phytophthora cryptogea. In this study, plantlets of healthy and root-rot pathogen-infected G. hybrida were used as plant materials for transcriptome analyis using high-throughput Illumina sequencing technique. A total 108,135 unigenes were generated with an average length of 727 nt and N50 equal to 1274 nt out of which 611 genes were identified as DEGs by DESeq analyses. Among DEGs, 228 genes were up-regulated and 383 were down-regulated. Through this annotated data and Kyoto encyclopedia of genes and genomes (KEGG), molecular interaction network, transcripts accompanying with tyrosine metabolism, phenylalanine, tyrosine, and tryptophan biosynthesis, phenylpropanoid and flavonoid biosynthesis, and plant hormone signal transduction pathways were thoroughly observed considering expression pattern. The involvement of DEGs in tyrosine metabolism pathway was validated by real-time qPCR. We found that genes related with tyrosine metabolism were activated and up-regulated against stress response. The expression of GhTAT, GhAAT, GhHPD, GhHGD and GhFAH genes was significantly increased in the leaves and petioles at four and six dpi (days post inoculation) as compared with control. The study predicts the gene sequences responsible for the tyrosine metabolism pathway and its responses against root-rot resistance in gerbera plant. In future, identification of such genes is necessary for the better understanding of rot resistance mechanism and to develop a root rot resistance strategy for ornamental plants.
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Affiliation(s)
- Nigarish Munir
- Institute of Horticultural Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Chunzhen Cheng
- Institute of Horticultural Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Chaoshui Xia
- Sanming Academy of Agricultural Sciences, Sanming, Fujian, China
| | - Xuming Xu
- Sanming Academy of Agricultural Sciences, Sanming, Fujian, China
| | - Muhammad Azher Nawaz
- Department of Horticulture, College of Agriculture, University of Sargodha, Sargodha, Pakistan
| | - Junaid Iftikhar
- Fujian Provincial Key Labortary of Plant Functional Biology, College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yukun Chen
- Institute of Horticultural Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yuling Lin
- Institute of Horticultural Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Zhongxiong Lai
- Institute of Horticultural Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, China
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10
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Obydennov DL, El-Tantawy AI, Sosnovskikh VY. Triacetic acid lactone as a bioprivileged molecule in organic synthesis. MENDELEEV COMMUNICATIONS 2019. [DOI: 10.1016/j.mencom.2019.01.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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11
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Kontturi J, Osama R, Deng X, Bashandy H, Albert VA, Teeri TH. Functional characterization and expression of GASCL1 and GASCL2, two anther-specific chalcone synthase like enzymes from Gerbera hybrida. PHYTOCHEMISTRY 2017; 134:38-45. [PMID: 27884449 DOI: 10.1016/j.phytochem.2016.11.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 10/28/2016] [Accepted: 11/08/2016] [Indexed: 05/22/2023]
Abstract
The chalcone synthase superfamily consists of type III polyketidesynthases (PKSs), enzymes responsible for producing plant secondary metabolites with various biological and pharmacological activities. Anther-specific chalcone synthase-like enzymes (ASCLs) represent an ancient group of type III PKSs involved in the biosynthesis of sporopollenin, the main component of the exine layer of moss spores and mature pollen grains of seed plants. In the latter, ASCL proteins are localized in the tapetal cells of the anther where they participate in sporopollenin biosynthesis and exine formation within the locule. It is thought that the enzymes responsible for sporopollenin biosynthesis are highly conserved, and thus far, each angiosperm species with a genome sequenced has possessed two ASCL genes, which in Arabidopsis thaliana are PKSA and PKSB. The Gerbera hybrida (gerbera) PKS protein family consists of three chalcone synthases (GCHS1, GCHS3 and GCHS4) and three 2-pyrone synthases (G2PS1, G2PS2 and G2PS3). In previous studies we have demonstrated the functions of chalcone synthases in flavonoid biosynthesis, and the involvement of 2-pyrone synthases in the biosynthesis of antimicrobial compounds found in gerbera. In this study we expanded the gerbera PKS-family by functionally characterizing two gerbera ASCL proteins. In vitro enzymatic studies using purified recombinant proteins showed that both GASCL1 and GASCL2 were able to use medium and long-chain acyl-CoA starters and perform two to three condensation reactions of malonyl-CoA to produce tri- and tetraketide 2-pyrones, usually referred to as alpha-pyrones in sporopollenin literature. Both GASCL1 and GASCL2 genes were expressed only in floral organs, with most expression observed in anthers. In the anthers, transcripts of both genes showed strict tapetum-specific localization.
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Affiliation(s)
- Juha Kontturi
- Department of Agricultural Sciences, Viikki Plant Science Centre, P.O. Box 27, University of Helsinki, Helsinki, FIN-00014, Finland
| | - Raisa Osama
- Department of Agricultural Sciences, Viikki Plant Science Centre, P.O. Box 27, University of Helsinki, Helsinki, FIN-00014, Finland
| | - Xianbao Deng
- Department of Agricultural Sciences, Viikki Plant Science Centre, P.O. Box 27, University of Helsinki, Helsinki, FIN-00014, Finland
| | - Hany Bashandy
- Department of Agricultural Sciences, Viikki Plant Science Centre, P.O. Box 27, University of Helsinki, Helsinki, FIN-00014, Finland; Department of Genetics, Cairo University, 13 Gamaa St., Giza, 12619, Egypt
| | - Victor A Albert
- Department of Biological Sciences, University of Buffalo, USA
| | - Teemu H Teeri
- Department of Agricultural Sciences, Viikki Plant Science Centre, P.O. Box 27, University of Helsinki, Helsinki, FIN-00014, Finland.
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12
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Pietiäinen M, Kontturi J, Paasela T, Deng X, Ainasoja M, Nyberg P, Hotti H, Teeri TH. Two polyketide synthases are necessary for 4-hydroxy-5-methylcoumarin biosynthesis in Gerbera hybrida. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2016; 87:548-58. [PMID: 27227340 DOI: 10.1111/tpj.13216] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 05/03/2016] [Accepted: 05/12/2016] [Indexed: 05/22/2023]
Abstract
Gerbera (Gerbera hybrida) is an economically important ornamental species and a model plant of the Asteraceae family for flower development and secondary metabolism. Gerberin and parasorboside, two bitter tasting glucosidic lactones, are produced in high amounts in nearly all gerbera tissues. Gerbera and its close relatives also produce a rare coumarin, 4-hydroxy-5-methylcoumarin (HMC). Unlike most coumarins, 5-methylcoumarins have been suggested to be derived through the acetate-malonate pathway. All of these polyketide-derived glucosylated molecules are considered to have a role in defense against herbivores and phytopathogens in gerbera. Gerbera expresses three genes encoding 2-pyrone synthases (G2PS1-3). The enzymes are chalcone synthase-like polyketide synthases with altered starter substrate specificity. We have shown previously that G2PS1 is responsible for the synthesis of 4-hydroxy-6-methyl-2-pyrone (triacetolactone), a putative precursor of gerberin and parasorboside. Here we show that polyketide synthases G2PS2 and G2PS3 are necessary for the biosynthesis of HMC in gerbera, and that a reductase enzyme is likely required to complete the pathway to HMC. G2PS2 is expressed in the leaf blade and inflorescences of gerbera, while G2PS3 is strictly root specific. Heterologous expression of G2PS2 or G2PS3 in tobacco leads to the formation of 4,7-dihydroxy-5-methylcoumarin, apparently an unreduced precursor of HMC, while ectopic expression in gerbera leads to HMC formation in tissues where nontransgenic tissue does not express the genes and does not accumulate the compound. Using protein modelling and site-directed mutagenesis we identified the residues I203 and T344 in G2PS2 and G2PS3 to be critical for pentaketide synthase activity.
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Affiliation(s)
- Milla Pietiäinen
- Department of Agricultural Sciences, Viikki Plant Science Centre, University of Helsinki, P.O. Box 27, Helsinki, FIN-00014, Finland
| | - Juha Kontturi
- Department of Agricultural Sciences, Viikki Plant Science Centre, University of Helsinki, P.O. Box 27, Helsinki, FIN-00014, Finland
| | - Tanja Paasela
- Department of Agricultural Sciences, Viikki Plant Science Centre, University of Helsinki, P.O. Box 27, Helsinki, FIN-00014, Finland
| | - Xianbao Deng
- Department of Agricultural Sciences, Viikki Plant Science Centre, University of Helsinki, P.O. Box 27, Helsinki, FIN-00014, Finland
| | - Miia Ainasoja
- Department of Agricultural Sciences, Viikki Plant Science Centre, University of Helsinki, P.O. Box 27, Helsinki, FIN-00014, Finland
| | - Paulina Nyberg
- Department of Agricultural Sciences, Viikki Plant Science Centre, University of Helsinki, P.O. Box 27, Helsinki, FIN-00014, Finland
| | - Hannu Hotti
- Department of Agricultural Sciences, Viikki Plant Science Centre, University of Helsinki, P.O. Box 27, Helsinki, FIN-00014, Finland
| | - Teemu H Teeri
- Department of Agricultural Sciences, Viikki Plant Science Centre, University of Helsinki, P.O. Box 27, Helsinki, FIN-00014, Finland.
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Li H, Liang J, Chen H, Ding G, Ma B, He N. Evolutionary and functional analysis of mulberry type III polyketide synthases. BMC Genomics 2016; 17:540. [PMID: 27487946 PMCID: PMC4973071 DOI: 10.1186/s12864-016-2843-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 06/16/2016] [Indexed: 01/05/2023] Open
Abstract
Background Type III polyketide synthases are important for the biosynthesis of flavonoids and various plant polyphenols. Mulberry plants have abundant polyphenols, but very little is known about the mulberry type III polyketide synthase genes. An analysis of these genes may provide new targets for genetic improvement to increase relevant secondary metabolites and enhance the plant tolerance to biotic and abiotic stresses. Results Eighteen genes encoding type III polyketide synthases were identified, including six chalcone synthases (CHS), ten stilbene synthases (STS), and two polyketide synthases (PKS). Functional characterization of four genes representing most of the MnCHS and MnSTS genes by coexpression with 4-Coumaroyl-CoA ligase in Escherichia coli indicated that their products were able to catalyze p-coumaroyl-CoA and malonyl-CoA to generate naringenin and resveratrol, respectively. Microsynteny analysis within mulberry indicated that segmental and tandem duplication events contributed to the expansion of the MnCHS family, while tandem duplications were mainly responsible for the generation of the MnSTS genes. Combining the evolution and expression analysis results of the mulberry type III PKS genes indicated that MnCHS and MnSTS genes evolved mainly under purifying selection to maintain their original functions, but transcriptional subfunctionalization occurred during long-term species evolution. Moreover, mulberry leaves can rapidly accumulated oxyresveratrol after UV-C irradiation, suggesting that resveratrol was converted to oxyresveratrol. Conclusions Characterizing the functions and evolution of mulberry type III PKS genes is crucial for advancing our understanding of these genes and providing the basis for further studies on the biosynthesis of relevant secondary metabolites in mulberry plants. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2843-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Han Li
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Beibei, Chongqing, 400715, People's Republic of China
| | - Jiubo Liang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Beibei, Chongqing, 400715, People's Republic of China
| | - Hu Chen
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Beibei, Chongqing, 400715, People's Republic of China
| | - Guangyu Ding
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Beibei, Chongqing, 400715, People's Republic of China
| | - Bi Ma
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Beibei, Chongqing, 400715, People's Republic of China
| | - Ningjia He
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Beibei, Chongqing, 400715, People's Republic of China.
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Fu Y, Esselink GD, Visser RGF, van Tuyl JM, Arens P. Transcriptome Analysis of Gerbera hybrida Including in silico Confirmation of Defense Genes Found. FRONTIERS IN PLANT SCIENCE 2016; 7:247. [PMID: 26973688 PMCID: PMC4771743 DOI: 10.3389/fpls.2016.00247] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 02/14/2016] [Indexed: 05/21/2023]
Abstract
For the ornamental crop Gerbera hybrida, breeding at the moment is done using conventional methods. As this has drawbacks in breeding speed and efficiency, especially for complex traits like disease resistance, we set out to develop genomic resources. The leaf and flower bud transcriptomes of four parents, used to generate two gerbera populations, were sequenced using Illumina paired-end sequencing. In total, 36,770 contigs with an average length of 1397 bp were generated and these have been the starting point for SNP identification and annotation. The consensus contig sequences were used to map reads of individual parents, to identify genotype specific SNPs, and to assess the presence of common SNPs between genotypes. Comparison with the non-redundant protein database (nr) showed that 29,146 contigs gave BLAST hits. Of sequences with blast results, 73.3% obtained a clear gene ontology (GO) annotation. EST contigs coding for enzymes were found in Kyoto Encyclopedia of Genes and Genomes maps (KEGG). Through, these annotated data and KEGG molecular interaction network, transcripts associated with the phenylpropanoid metabolism, other secondary metabolite biosynthesis pathways, phytohormone biosynthesis and signal transduction were analyzed in more detail. Identifying genes involved in these processes could provide genetic and genomic resources for studying the mechanism of disease resistance in gerbera.
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Deng X, Bashandy H, Ainasoja M, Kontturi J, Pietiäinen M, Laitinen RAE, Albert VA, Valkonen JPT, Elomaa P, Teeri TH. Functional diversification of duplicated chalcone synthase genes in anthocyanin biosynthesis of Gerbera hybrida. THE NEW PHYTOLOGIST 2014; 201:1469-1483. [PMID: 24266452 DOI: 10.1111/nph.12610] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Accepted: 10/17/2013] [Indexed: 05/19/2023]
Abstract
• Chalcone synthase (CHS) is the key enzyme in the first committed step of the flavonoid biosynthetic pathway and catalyzes the stepwise condensation of 4-coumaroyl-CoA and malonyl-CoA to naringenin chalcone. In plants, CHS is often encoded by a small family of genes that are temporally and spatially regulated. Our earlier studies have shown that GCHS4 is highly activated by ectopic expression of an MYB-type regulator GMYB10 in gerbera (Gerbera hybrida). • The tissue- and development-specific expression patterns of three gerbera CHS genes were examined. Virus-induced gene silencing (VIGS) was used to knock down GCHS1 and GCHS4 separately in gerbera inflorescences. • Our data show that GCHS4 is the only CHS encoding gene that is expressed in the cyanidin-pigmented vegetative tissues of gerbera cv Terraregina. GCHS3 expression is pronounced in the pappus bristles of the flowers. Expression of both GCHS1 and GCHS4 is high in the epidermal cells of gerbera petals, but only GCHS1 is contributing to flavonoid biosynthesis. • Gerbera contains a family of three CHS encoding genes showing different spatial and temporal regulation. GCHS4 expression in gerbera petals is regulated post-transcriptionally, at the level of either translation elongation or protein stability.
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Affiliation(s)
- Xianbao Deng
- Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Helsinki, Finland
| | - Hany Bashandy
- Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Helsinki, Finland
- Department of Genetics, Cairo University, 13 Gamaa St., Giza, 12619, Egypt
| | - Miia Ainasoja
- Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Helsinki, Finland
| | - Juha Kontturi
- Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Helsinki, Finland
| | - Milla Pietiäinen
- Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Helsinki, Finland
| | - Roosa A E Laitinen
- Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Helsinki, Finland
| | - Victor A Albert
- Department of Biological Sciences, University at Buffalo, Buffalo, NY, 14260, USA
| | - Jari P T Valkonen
- Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Helsinki, Finland
| | - Paula Elomaa
- Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Helsinki, Finland
| | - Teemu H Teeri
- Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Helsinki, Finland
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Deng X, Elomaa P, Nguyen CX, Hytönen T, Valkonen JPT, Teeri TH. Virus-induced gene silencing for Asteraceae--a reverse genetics approach for functional genomics in Gerbera hybrida. PLANT BIOTECHNOLOGY JOURNAL 2012; 10:970-8. [PMID: 22805353 DOI: 10.1111/j.1467-7652.2012.00726.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Virus-induced gene silencing (VIGS) is a natural defence mechanism in plants which leads to sequence-specific degradation of viral RNA. For identifying gene functions, Tobacco rattle virus (TRV)-based VIGS has been applied for silencing of endogenous genes in many plant species. Gerbera hybrida (Asteraceae) has emerged as a novel model for studies in flower development and secondary metabolism. For this highly heterozygous species, functional studies have been conducted through reverse genetic methods by producing stable transgenic lines, which, however, is labour-intensive and time-consuming. For the development of TRV-based VIGS system for gerbera, and for the first time for an Asteraceaeous species, we screened several gerbera cultivars and optimized the agroinfiltration methods for efficient silencing. Gene fragments for gerbera phytoene desaturase (GPDS) and Mg-chelatase subunits (GChl-H and GChl-I), expressed from a TRV vector, induced silencing phenotypes in leaves, scapes, and involucral bracts indicating their feasibility as markers for green tissues. In addition, robust silencing symptoms were achieved in gerbera floral tissues by silencing the anthocyanin pathway gene for chalcone synthase (GCHS1) and a gerbera B-type MADS-box gene globosa (GGLO1), confirming the phenotypes previously observed in stable transgenic lines. Unexpectedly, photobleaching induced by GPDS and GChl-H or GChl-I silencing, or by the herbicide norflurazon, resulted in silencing of the polyketide synthase gene G2PS1, which has no apparent connections to carotenoid or chlorophyll biosynthesis. We have shown feasibility of VIGS for functional studies in gerbera, but our results also show that selection of the marker gene for silencing must be critically evaluated.
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Affiliation(s)
- Xianbao Deng
- Department of Agricultural Sciences, University of Helsinki, Helsinki, Finland
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