701
|
Zi J, Mafu S, Peters RJ. To gibberellins and beyond! Surveying the evolution of (di)terpenoid metabolism. ANNUAL REVIEW OF PLANT BIOLOGY 2014; 65:259-86. [PMID: 24471837 PMCID: PMC4118669 DOI: 10.1146/annurev-arplant-050213-035705] [Citation(s) in RCA: 180] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The diterpenoids are classically defined by their composition--four isoprenyl units (20 carbons)--and are generally derived from [E,E,E]-geranylgeranyl diphosphate (GGPP). Such metabolism seems to be ancient and has been extensively diversified, with ∼12,000 diterpenoid natural products known. Particularly notable are the gibberellin phytohormones, whose requisite biosynthesis has provided a genetic reservoir that gave rise to not only a large superfamily of ∼7,000 diterpenoids but also, to some degree, all plant terpenoid natural products. This review focuses on the diterpenoids, particularly the defining biosynthetic characteristics of the major superfamilies defined by the cyclization and/or rearrangement of GGPP catalyzed by diterpene synthases/cyclases, although it also includes some discussion of the important subsequent elaboration in the few cases where sufficient molecular genetic information is available. It additionally addresses the array of biological activity providing the selective pressures that drive the observed gene family expansion and diversification, along with biosynthetic gene clustering.
Collapse
|
702
|
Schmidt-Dannert C. Biosynthesis of terpenoid natural products in fungi. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2014; 148:19-61. [PMID: 25414054 DOI: 10.1007/10_2014_283] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Tens of thousands of terpenoid natural products have been isolated from plants and microbial sources. Higher fungi (Ascomycota and Basidiomycota) are known to produce an array of well-known terpenoid natural products, including mycotoxins, antibiotics, antitumor compounds, and phytohormones. Except for a few well-studied fungal biosynthetic pathways, the majority of genes and biosynthetic pathways responsible for the biosynthesis of a small number of these secondary metabolites have only been discovered and characterized in the past 5-10 years. This chapter provides a comprehensive overview of the current knowledge on fungal terpenoid biosynthesis from biochemical, genetic, and genomic viewpoints. Enzymes involved in synthesizing, transferring, and cyclizing the prenyl chains that form the hydrocarbon scaffolds of fungal terpenoid natural products are systematically discussed. Genomic information and functional evidence suggest differences between the terpenome of the two major fungal phyla--the Ascomycota and Basidiomycota--which will be illustrated for each group of terpenoid natural products.
Collapse
Affiliation(s)
- Claudia Schmidt-Dannert
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minneapolis, MN, 55108, USA,
| |
Collapse
|
703
|
Bach SS, Bassard JÉ, Andersen-Ranberg J, Møldrup ME, Simonsen HT, Hamberger B. High-throughput testing of terpenoid biosynthesis candidate genes using transient expression in Nicotiana benthamiana. Methods Mol Biol 2014; 1153:245-55. [PMID: 24777803 DOI: 10.1007/978-1-4939-0606-2_18] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
To respond to the rapidly growing number of genes putatively involved in terpenoid metabolism, a robust high-throughput platform for functional testing is needed. An in planta expression system offers several advantages such as the capacity to produce correctly folded and active enzymes localized to the native compartments, unlike microbial or prokaryotic expression systems. Two inherent drawbacks of plant-based expression systems, time-consuming generation of transgenic plant lines and challenging gene-stacking, can be circumvented by transient expression in Nicotiana benthamiana. In this chapter we describe an expression platform for rapid testing of candidate terpenoid biosynthetic genes based on Agrobacterium mediated gene expression in N. benthamiana leaves. Simultaneous expression of multiple genes is facilitated by co-infiltration of leaves with several engineered Agrobacterium strains, possibly making this the fastest and most convenient system for the assembly of plant terpenoid biosynthetic routes. Tools for cloning of expression plasmids, N. benthamiana culturing, Agrobacterium preparation, leaf infiltration, metabolite extraction, and automated GC-MS data mining are provided. With all steps optimized for high throughput, this in planta expression platform is particularly suited for testing large panels of candidate genes in all possible permutations.
Collapse
Affiliation(s)
- Søren Spanner Bach
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, Copenhagen Plant Science Centre, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Copenhagen, Denmark
| | | | | | | | | | | |
Collapse
|
704
|
Bach SS, King BC, Zhan X, Simonsen HT, Hamberger B. Heterologous stable expression of terpenoid biosynthetic genes using the moss Physcomitrella patens. Methods Mol Biol 2014; 1153:257-271. [PMID: 24777804 DOI: 10.1007/978-1-4939-0606-2_19] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Heterologous and stable expression of genes encoding terpenoid biosynthetic enzymes in planta is an important tool for functional characterization and is an attractive alternative to expression in microbial hosts for biotechnological production. Despite improvements to the procedure, such as streamlining of large scale Agrobacterium infiltration and upregulation of the upstream pathways, transient in planta heterologous expression quickly reaches limitations when used for production of terpenoids. Stable integration of transgenes into the nuclear genome of the moss Physcomitrella patens has already been widely recognized as a viable alternative for industrial-scale production of biopharmaceuticals. For expression of terpenoid biosynthetic genes, and reconstruction of heterologous pathways, Physcomitrella has unique attributes that makes it a very promising biotechnological host. These features include a high native tolerance to terpenoids, a simple endogenous terpenoid profile, convenient genome editing using homologous recombination, and cultivation techniques that allow up-scaling from single cells in microtiter plates to industrial photo-bioreactors. Beyond its use for functional characterization of terpenoid biosynthetic genes, engineered Physcomitrella can be a green biotechnological platform for production of terpenoids. Here, we describe two complementary and simple procedures for stable nuclear transformation of Physcomitrella with terpenoid biosynthetic genes, selection and cultivation of transgenic lines, and metabolite analysis of terpenoids produced in transgenic moss lines. We also provide tools for metabolic engineering through genome editing using homologous recombination.
Collapse
Affiliation(s)
- Søren Spanner Bach
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, Copenhagen Plant Science Centre, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Copenhagen, Denmark
| | | | | | | | | |
Collapse
|
705
|
Kang JH, Gonzales-Vigil E, Matsuba Y, Pichersky E, Barry CS. Determination of residues responsible for substrate and product specificity of Solanum habrochaites short-chain cis-prenyltransferases. PLANT PHYSIOLOGY 2014; 164:80-91. [PMID: 24254315 PMCID: PMC3875827 DOI: 10.1104/pp.113.230466] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Isoprenoids are diverse compounds that have their biosynthetic origin in the initial condensation of isopentenyl diphosphate and dimethylallyl diphosphate to form C10 prenyl diphosphates that can be elongated by the addition of subsequent isopentenyl diphosphate units. These reactions are catalyzed by either cis-prenyltransferases (CPTs) or trans-prenyltransferases. The synthesis of volatile terpenes in plants typically proceeds through either geranyl diphosphate (C10) or trans-farnesyl diphosphate (C15), to yield monoterpenes and sesquiterpenes, respectively. However, terpene biosynthesis in glandular trichomes of tomato (Solanum lycopersicum) and related wild relatives also occurs via the cis-substrates neryl diphosphate (NPP) and 2Z,6Z-farnesyl diphosphate (Z,Z-FPP). NPP and Z,Z-FPP are synthesized by neryl diphosphate synthase1 (NDPS1) and Z,Z-farnesyl diphosphate synthase (zFPS), which are encoded by the orthologous CPT1 locus in tomato and Solanum habrochaites, respectively. In this study, comparative sequence analysis of NDPS1 and zFPS enzymes from S. habrochaites accessions that synthesize either monoterpenes or sesquiterpenes was performed to identify amino acid residues that correlate with the ability to synthesize NPP or Z,Z-FPP. Subsequent structural modeling, coupled with site-directed mutagenesis, highlighted the importance of four amino acids located within conserved domain II of CPT enzymes that form part of the second α-helix, for determining substrate and product specificity of these enzymes. In particular, the relative positioning of aromatic amino acid residues at positions 100 and 107 determines the ability of these enzymes to synthesize NPP or Z,Z-FPP. This study provides insight into the biochemical evolution of terpene biosynthesis in the glandular trichomes of Solanum species.
Collapse
|
706
|
Quin MB, Flynn CM, Wawrzyn GT, Choudhary S, Schmidt-Dannert C. Mushroom hunting by using bioinformatics: application of a predictive framework facilitates the selective identification of sesquiterpene synthases in basidiomycota. Chembiochem 2013; 14:2480-91. [PMID: 24166732 PMCID: PMC3866635 DOI: 10.1002/cbic.201300349] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Indexed: 12/27/2022]
Abstract
The Basidiomycota fungi represent a diverse source of natural products, particularly the sesquiterpenoids. Recently, genome sequencing, genome mining, and the subsequent discovery of a suite of sesquiterpene synthases in Omphalotus olearius was described. A predictive framework was developed to facilitate the discovery of sesquiterpene synthases in Basidiomycota. Phylogenetic analyses indicated a conservation of both sequence and initial cyclization mechanisms used. Here, the first robust application of this predictive framework is reported. It was used to selectively identify sesquiterpene synthases that follow 1,6-, 1,10-, and 1,11-cyclization mechanisms in the crust fungus Stereum hirsutum. The successful identification and characterization of a 1,6- and a 1,10-cyclizing sesquiterpene synthase, as well as three 1,11-cyclizing Δ(6) -protoilludene synthases, is described. This study verifies the accuracy and utility of the predictive framework as a roadmap for the discovery of specific sesquiterpene synthases from Basidiomycota, and thus represents an important step forward in natural product discovery.
Collapse
Affiliation(s)
- Maureen B. Quin
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, 1479 Gortner Avenue, St. Paul, MN 55108, USA
| | - Christopher M. Flynn
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, 1479 Gortner Avenue, St. Paul, MN 55108, USA
| | - Grayson T. Wawrzyn
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, 1479 Gortner Avenue, St. Paul, MN 55108, USA
| | - Swati Choudhary
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, 1479 Gortner Avenue, St. Paul, MN 55108, USA
| | - Claudia Schmidt-Dannert
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, 1479 Gortner Avenue, St. Paul, MN 55108, USA
| |
Collapse
|
707
|
Din M, Barozai MYK. Profiling microRNAs and their targets in an important fleshy fruit: tomato (Solanum lycopersicum). Gene 2013; 535:198-203. [PMID: 24315821 DOI: 10.1016/j.gene.2013.11.034] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 11/11/2013] [Accepted: 11/14/2013] [Indexed: 12/11/2022]
Abstract
Tomato (Solanum lycopersicum) is an important and the most useful plant based diet. It is widely used for its antioxidant property. Presently, only two digits, tomato microRNAs (miRNAs) are reported in miRBase: a miRNA database. This study is aimed to profile and characterize more miRNAs and their targets in tomato. A comprehensive comparative genomic approach is applied and a total of 109 new miRNAs belonging to 106 families are identified and characterized from the tomato expressed sequence tags (ESTs). All these potential miRNAs are profiled for the first time in tomato. The profiled miRNAs are also observed with stable stem-loop structures (Precursor-miRNAs), whose length ranges from 45 to 329 nucleotides (nt) with an average of 125 nt. The mature miRNAs are found in the stem of pre-miRNAs and their length ranges from 19 to 24 nt with an average of 21 nt. Furthermore, twelve miRNAs are randomly selected and experimentally validated through RT-PCR. A total of 406 putative targets are also predicted for the newly 109 tomato miRNAs. These targets are involved in structural protein, metabolism, transcription factor, growth & development, stress related, signaling pathways, storage proteins and other vital processes. Some important proteins like; 9-cisepoxycarotenoid dioxygenase (NCED), transcription factor MYB, ATP-binding cassette transporters, terpen synthase, 14-3-3 and TIR-NBS proteins are also predicted as putative targets for tomato miRNAs. These findings improve a baseline data of miRNAs and their targets in tomato. This baseline data can be utilized to fine tune this important fleshy fruit for nutritional & antioxidant properties and also under biotic & abiotic stresses.
Collapse
Affiliation(s)
- Muhammad Din
- Department of Botany, University of Balochistan, Sariab Road Quetta, Pakistan
| | | |
Collapse
|
708
|
Yang CQ, Wu XM, Ruan JX, Hu WL, Mao YB, Chen XY, Wang LJ. Isolation and characterization of terpene synthases in cotton (Gossypium hirsutum). PHYTOCHEMISTRY 2013; 96:46-56. [PMID: 24074555 DOI: 10.1016/j.phytochem.2013.09.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 07/23/2013] [Accepted: 09/05/2013] [Indexed: 05/23/2023]
Abstract
Cotton plants accumulate gossypol and related sesquiterpene aldehydes, which function as phytoalexins against pathogens and feeding deterrents to herbivorous insects. However, to date little is known about the biosynthesis of volatile terpenes in this crop. Herein is reported that 5 monoterpenes and 11 sesquiterpenes from extracts of a glanded cotton cultivar, Gossypium hirsutum cv. CCRI12, were detected by gas chromatography-mass spectrometry (GC-MS). By EST data mining combined with Rapid Amplification of cDNA Ends (RACE), full-length cDNAs of three terpene synthases (TPSs), GhTPS1, GhTPS2 and GhTPS3 were isolated. By in vitro assays of the recombinant proteins, it was found that GhTPS1 and GhTPS2 are sesquiterpene synthases: the former converted farnesyl pyrophosphate (FPP) into β-caryophyllene and α-humulene in a ratio of 2:1, whereas the latter produced several sesquiterpenes with guaia-1(10),11-diene as the major product. By contrast, GhTPS3 is a monoterpene synthase, which produced α-pinene, β-pinene, β-phellandrene and trace amounts of other monoterpenes from geranyl pyrophosphate (GPP). The TPS activities were also supported by Virus Induced Gene Silencing (VIGS) in the cotton plant. GhTPS1 and GhTPS3 were highly expressed in the cotton plant overall, whereas GhTPS2 was expressed only in leaves. When stimulated by mechanical wounding, Verticillium dahliae (Vde) elicitor or methyl jasmonate (MeJA), production of terpenes and expression of the corresponding synthase genes were induced. These data demonstrate that the three genes account for the biosynthesis of volatile terpenes of cotton, at least of this Upland cotton.
Collapse
Affiliation(s)
- Chang-Qing Yang
- National Key Laboratory of Plant Molecular Genetics and National Center for Plant Gene Research, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | | | | | | | | | | | | |
Collapse
|
709
|
Zhao N, Wang G, Norris A, Chen X, Chen F. Studying Plant Secondary Metabolism in the Age of Genomics. CRITICAL REVIEWS IN PLANT SCIENCES 2013; 32:369-382. [PMID: 0 DOI: 10.1080/07352689.2013.789648] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
|
710
|
Sarker LS, Demissie ZA, Mahmoud SS. Cloning of a sesquiterpene synthase from Lavandula x intermedia glandular trichomes. PLANTA 2013; 238:983-989. [PMID: 23918183 DOI: 10.1007/s00425-013-1937-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Accepted: 07/18/2013] [Indexed: 06/02/2023]
Abstract
The essential oil (EO) of Lavandula is dominated by monoterpenes, but can also contain small amounts of sesquiterpenes, depending on species and environmental conditions. For example, the sesquiterpene 9-epi-caryophyllene can make up to 8 % of the EO in a few species, including those commercially propagated for EO production. Here, we report the cloning and functional characterization of 9-epi-caryophyllene synthase (LiCPS) from the glandular trichomes of Lavandula x intermedia, cv. Grosso. The 1,617 bp open reading frame of LiCPS, which did not encode a transit peptide, was expressed in Escherichia coli and the recombinant protein purified by Ni-NTA agarose affinity chromatography. The ca. 60 kDa recombinant protein specifically converted farnesyl diphosphate to 9-epi-caryophyllene. LiCPS also produced a few monoterpenes when assayed with the monoterpene precursor geranyl diphosphate (GPP), but--unlike most monoterpene synthases--was not able to derive detectable amounts of any products from the cis isomer of GPP, neryl diphosphate. The LiCPS transcripts accumulated in developing L. x intermedia flowers and were highly enriched in glandular trichomes, but were not detected in leaves suggesting that the transcriptional expression of this gene is spatially and developmentally regulated.
Collapse
|
711
|
Han XJ, Wang YD, Chen YC, Lin LY, Wu QK. Transcriptome sequencing and expression analysis of terpenoid biosynthesis genes in Litsea cubeba. PLoS One 2013; 8:e76890. [PMID: 24130803 PMCID: PMC3793921 DOI: 10.1371/journal.pone.0076890] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 08/28/2013] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Aromatic essential oils extracted from fresh fruits of Litsea cubeba (Lour.) Pers., have diverse medical and economic values. The dominant components in these essential oils are monoterpenes and sesquiterpenes. Understanding the molecular mechanisms of terpenoid biosynthesis is essential for improving the yield and quality of terpenes. However, the 40 available L. cubeba nucleotide sequences in the public databases are insufficient for studying the molecular mechanisms. Thus, high-throughput transcriptome sequencing of L. cubeba is necessary to generate large quantities of transcript sequences for the purpose of gene discovery, especially terpenoid biosynthesis related genes. RESULTS Using Illumina paired-end sequencing, approximately 23.5 million high-quality reads were generated. De novo assembly yielded 68,648 unigenes with an average length of 834 bp. A total of 38,439 (56%) unigenes were annotated for their functions, and 35,732 and 25,806 unigenes could be aligned to the GO and COG database, respectively. By searching against the Kyoto Encyclopedia of Genes and Genomes Pathway database (KEGG), 16,130 unigenes were assigned to 297 KEGG pathways, and 61 unigenes, which contained the mevalonate and 2-C-methyl-D-erythritol 4-phosphate pathways, could be related to terpenoid backbone biosynthesis. Of the 12,963 unigenes, 285 were annotated to the terpenoid pathways using the PlantCyc database. Additionally, 14 terpene synthase genes were identified from the transcriptome. The expression patterns of the 16 genes related to terpenoid biosynthesis were analyzed by RT-qPCR to explore their putative functions. CONCLUSION RNA sequencing was effective in identifying a large quantity of sequence information. To our knowledge, this study is the first exploration of the L. cubeba transcriptome, and the substantial amount of transcripts obtained will accelerate the understanding of the molecular mechanisms of essential oils biosynthesis. The results may help improve future genetic and genomics studies on the molecular mechanisms behind the chemical composition of essential oils in L. cubeba fruits.
Collapse
Affiliation(s)
- Xiao-Jiao Han
- State Key Laboratory of Forest Genetics and Tree Breeding, Chinese Academy of Forestry, Beijing, P. R. China
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, P. R. China
| | - Yang-Dong Wang
- State Key Laboratory of Forest Genetics and Tree Breeding, Chinese Academy of Forestry, Beijing, P. R. China
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, P. R. China
| | - Yi-Cun Chen
- State Key Laboratory of Forest Genetics and Tree Breeding, Chinese Academy of Forestry, Beijing, P. R. China
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, P. R. China
| | - Li-Yuan Lin
- State Key Laboratory of Forest Genetics and Tree Breeding, Chinese Academy of Forestry, Beijing, P. R. China
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, P. R. China
| | - Qing-Ke Wu
- State Key Laboratory of Forest Genetics and Tree Breeding, Chinese Academy of Forestry, Beijing, P. R. China
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, P. R. China
| |
Collapse
|
712
|
Ma H, Lu Z, Liu B, Qiu Q, Liu J. Transcriptome analyses of a Chinese hazelnut species Corylus mandshurica. BMC PLANT BIOLOGY 2013; 13:152. [PMID: 24093758 PMCID: PMC3819738 DOI: 10.1186/1471-2229-13-152] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 10/02/2013] [Indexed: 05/04/2023]
Abstract
BACKGROUND Corylus was renowned for its production of hazelnut and taxol. To understand the local adaptation of Chinese species and speed up breeding efforts in China, we analyzed the leaf transcriptome of Corylus mandshurica, which had a high tolerance to fungal infections and cold. RESULTS A total of 12,255,030 clean pair-end reads were generated and then assembled into 37,846 Expressed Sequence Tag (EST) sequences. During functional annotation, 26,565 ESTs were annotated with Gene Ontology (GO) terms using Blast2go and 11,056 ESTs were grouped into the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways using KEGG Automatic Annotation Server (KAAS). We identified 45 ESTs that were homologous to enzymes and transcription factors responsible for taxol synthesis. The most differentiated orthologs between C. mandshurica and a European congener, C. avellana, were enriched in stress tolerance to fungal resistance and cold. CONCLUSIONS In this study, we detected a set of genes related to taxol synthesis in a taxol-producing angiosperm species for the first time and found a close relationship between most differentiated genes and different adaptations to fungal infection and cold in C. mandshurica and C. avellana. These findings provided tools to improve our understanding of local adaptation, genetic breeding and taxol production in hazelnut.
Collapse
Affiliation(s)
- Hui Ma
- Molecular Ecology Group, State Key Laboratory of Grassland Agro-ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, China.
| | | | | | | | | |
Collapse
|
713
|
Zhang M, Liu J, Li K, Yu D. Identification and characterization of a novel monoterpene synthase from soybean restricted to neryl diphosphate precursor. PLoS One 2013; 8:e75972. [PMID: 24124526 PMCID: PMC3790869 DOI: 10.1371/journal.pone.0075972] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 08/18/2013] [Indexed: 11/18/2022] Open
Abstract
Terpenes are important defensive compounds against herbivores and pathogens. Here, we report the identification of a new monoterpene synthase gene, GmNES, from soybean. The transcription of GmNES was up-regulated in soybean plants that were infested with cotton leafworm (Prodenia litura), mechanically wounded or treated with salicylic acid (SA). Gas chromatography-mass spectrometry (GC-MS) analysis revealed that recombinant GmNES enzyme exclusively produced nerol, generated from a newly identified substrate for monoterpene synthase: neryl diphosphate (NPP). This finding indicates that GmNES is a nerol synthase gene in soybean. Subcellular localization using GFP fusions showed that GmNES localized to the chloroplasts. Transgenic tobacco overexpressing GmNES was generated. In dual-choice assays, the GmNES-expressing tobacco lines significantly repelled cotton leafworm. In feeding tests with transgenic plants, the growth and development of cotton leafworm were significantly retarded. This study confirms the ecological role of terpenoids and provides new insights into their metabolic engineering in transgenic plants.
Collapse
Affiliation(s)
- Man Zhang
- National Center for Soybean Improvement, National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
- Institute of Vegetable Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China
| | - Jianyu Liu
- National Center for Soybean Improvement, National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Kai Li
- National Center for Soybean Improvement, National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Deyue Yu
- National Center for Soybean Improvement, National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
| |
Collapse
|
714
|
Moses T, Pollier J, Thevelein JM, Goossens A. Bioengineering of plant (tri)terpenoids: from metabolic engineering of plants to synthetic biology in vivo and in vitro. THE NEW PHYTOLOGIST 2013; 200:27-43. [PMID: 23668256 DOI: 10.1111/nph.12325] [Citation(s) in RCA: 141] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Accepted: 04/12/2013] [Indexed: 05/19/2023]
Abstract
Terpenoids constitute a large and diverse class of natural products that serve many functions in nature. Most of the tens of thousands of the discovered terpenoids are synthesized by plants, where they function as primary metabolites involved in growth and development, or as secondary metabolites that optimize the interaction between the plant and its environment. Several plant terpenoids are economically important molecules that serve many applications as pharmaceuticals, pesticides, etc. Major challenges for the commercialization of plant-derived terpenoids include their low production levels in planta and the continuous demand of industry for novel molecules with new or superior biological activities. Here, we highlight several synthetic biology methods to enhance and diversify the production of plant terpenoids, with a foresight towards triterpenoid engineering, the least engineered class of bioactive terpenoids. Increased or cheaper production of valuable triterpenoids may be obtained by 'classic' metabolic engineering of plants or by heterologous production of the compounds in other plants or microbes. Novel triterpenoid structures can be generated through combinatorial biosynthesis or directed enzyme evolution approaches. In its ultimate form, synthetic biology may lead to the production of large amounts of plant triterpenoids in in vitro systems or custom-designed artificial biological systems.
Collapse
Affiliation(s)
- Tessa Moses
- Department of Plant Systems Biology, VIB, Technologiepark 927, B-9052, Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 927, B-9052, Gent, Belgium
- Department of Molecular Microbiology, VIB, Kasteelpark Arenberg 31, B-3001, Leuven, Heverlee, Belgium
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Kasteelpark Arenberg 31, B-3001, Leuven, Heverlee, Belgium
| | - Jacob Pollier
- Department of Plant Systems Biology, VIB, Technologiepark 927, B-9052, Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 927, B-9052, Gent, Belgium
| | - Johan M Thevelein
- Department of Molecular Microbiology, VIB, Kasteelpark Arenberg 31, B-3001, Leuven, Heverlee, Belgium
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Kasteelpark Arenberg 31, B-3001, Leuven, Heverlee, Belgium
| | - Alain Goossens
- Department of Plant Systems Biology, VIB, Technologiepark 927, B-9052, Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 927, B-9052, Gent, Belgium
| |
Collapse
|
715
|
Tao T, Zhao L, Lv Y, Chen J, Hu Y, Zhang T, Zhou B. Transcriptome sequencing and differential gene expression analysis of delayed gland morphogenesis in Gossypium australe during seed germination. PLoS One 2013; 8:e75323. [PMID: 24073262 PMCID: PMC3779162 DOI: 10.1371/journal.pone.0075323] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Accepted: 08/14/2013] [Indexed: 11/18/2022] Open
Abstract
The genus Gossypium is a globally important crop that is used to produce textiles, oil and protein. However, gossypol, which is found in cultivated cottonseed, is toxic to humans and non-ruminant animals. Efforts have been made to breed improved cultivated cotton with lower gossypol content. The delayed gland morphogenesis trait possessed by some Australian wild cotton species may enable the widespread, direct usage of cottonseed. However, the mechanisms about the delayed gland morphogenesis are still unknown. Here, we sequenced the first Australian wild cotton species (Gossypiumaustrale) and a diploid cotton species (Gossypiumarboreum) using the Illumina Hiseq 2000 RNA-seq platform to help elucidate the mechanisms underlying gossypol synthesis and gland development. Paired-end Illumina short reads were de novo assembled into 226,184, 213,257 and 275,434 transcripts, clustering into 61,048, 47,908 and 72,985 individual clusters with N50 lengths of 1,710 bp, 1544 BP and 1,743 bp, respectively. The clustered Unigenes were searched against three public protein databases (TrEMBL, SwissProt and RefSeq) and the nucleotide and protein sequences of Gossypiumraimondii using BLASTx and BLASTn. A total of 21,987, 17,209 and 25,325 Unigenes were annotated. Of these, 18,766 (85.4%), 14,552 (84.6%) and 21,374 (84.4%) Unigenes could be assigned to GO-term classifications. We identified and analyzed 13,884 differentially expressed Unigenes by clustering and functional enrichment. Terpenoid-related biosynthesis pathways showed differentially regulated expression patterns between the two cotton species. Phylogenetic analysis of the terpene synthases family was also carried out to clarify the classifications of TPSs. RNA-seq data from two distinct cotton species provide comprehensive transcriptome annotation resources and global gene expression profiles during seed germination and gland and gossypol formation. These data may be used to further elucidate various mechanisms and help promote the usage of cottonseed.
Collapse
Affiliation(s)
- Tao Tao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, MOE Hybrid Cotton R&D Engineering Research Center, Nanjing Agricultural University, Nanjing, Jiangsu, People’s Republic of China
| | - Liang Zhao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, MOE Hybrid Cotton R&D Engineering Research Center, Nanjing Agricultural University, Nanjing, Jiangsu, People’s Republic of China
| | - Yuanda Lv
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, MOE Hybrid Cotton R&D Engineering Research Center, Nanjing Agricultural University, Nanjing, Jiangsu, People’s Republic of China
| | - Jiedan Chen
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, MOE Hybrid Cotton R&D Engineering Research Center, Nanjing Agricultural University, Nanjing, Jiangsu, People’s Republic of China
| | - Yan Hu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, MOE Hybrid Cotton R&D Engineering Research Center, Nanjing Agricultural University, Nanjing, Jiangsu, People’s Republic of China
| | - Tianzhen Zhang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, MOE Hybrid Cotton R&D Engineering Research Center, Nanjing Agricultural University, Nanjing, Jiangsu, People’s Republic of China
| | - Baoliang Zhou
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, MOE Hybrid Cotton R&D Engineering Research Center, Nanjing Agricultural University, Nanjing, Jiangsu, People’s Republic of China
| |
Collapse
|
716
|
Schweiger W, Pasquet JC, Nussbaumer T, Paris MPK, Wiesenberger G, Macadré C, Ametz C, Berthiller F, Lemmens M, Saindrenan P, Mewes HW, Mayer KFX, Dufresne M, Adam G. Functional characterization of two clusters of Brachypodium distachyon UDP-glycosyltransferases encoding putative deoxynivalenol detoxification genes. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2013; 26:781-92. [PMID: 23550529 DOI: 10.1094/mpmi-08-12-0205-r] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Plant small-molecule UDP-glycosyltransferases (UGT) glycosylate a vast number of endogenous substances but also act in detoxification of metabolites produced by plant-pathogenic microorganisms. The ability to inactivate the Fusarium graminearum mycotoxin deoxynivalenol (DON) into DON-3-O-glucoside is crucial for resistance of cereals. We analyzed the UGT gene family of the monocot model species Brachypodium distachyon and functionally characterized two gene clusters containing putative orthologs of previously identified DON-detoxification genes from Arabidopsis thaliana and barley. Analysis of transcription showed that UGT encoded in both clusters are highly inducible by DON and expressed at much higher levels upon infection with a wild-type DON-producing F. graminearum strain compared with infection with a mutant deficient in DON production. Expression of these genes in a toxin-sensitive strain of Saccharomyces cerevisiae revealed that only two B. distachyon UGT encoded by members of a cluster of six genes homologous to the DON-inactivating barley HvUGT13248 were able to convert DON into DON-3-O-glucoside. Also, a single copy gene from Sorghum bicolor orthologous to this cluster and one of three putative orthologs of rice exhibit this ability. Seemingly, the UGT genes undergo rapid evolution and changes in copy number, making it difficult to identify orthologs with conserved substrate specificity.
Collapse
Affiliation(s)
- Wolfgang Schweiger
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, A-3430 Tulln, Austria.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
717
|
Transorganellar complementation redefines the biochemical continuity of endoplasmic reticulum and chloroplasts. Proc Natl Acad Sci U S A 2013; 110:12126-31. [PMID: 23818635 DOI: 10.1073/pnas.1306331110] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Tocopherols are nonpolar compounds synthesized and localized in plastids but whose genetic elimination specifically impacts fatty acid desaturation in the endoplasmic reticulum (ER), suggesting a direct interaction with ER-resident enzymes. To functionally probe for such interactions, we developed transorganellar complementation, where mutated pathway activities in one organelle are experimentally tested for substrate accessibility and complementation by active enzymes retargeted to a companion organelle. Mutations disrupting three plastid-resident activities in tocopherol and carotenoid synthesis were complemented from the ER in this fashion, demonstrating transorganellar access to at least seven nonpolar, plastid envelope-localized substrates from the lumen of the ER, likely through plastid:ER membrane interaction domains. The ability of enzymes in either organelle to access shared, nonpolar plastid metabolite pools redefines our understanding of the biochemical continuity of the ER and chloroplast with profound implications for the integration and regulation of organelle-spanning pathways that synthesize nonpolar metabolites in plants.
Collapse
|
718
|
Lima AS, Schimmel J, Lukas B, Novak J, Barroso JG, Figueiredo AC, Pedro LG, Degenhardt J, Trindade H. Genomic characterization, molecular cloning and expression analysis of two terpene synthases from Thymus caespititius (Lamiaceae). PLANTA 2013; 238:191-204. [PMID: 23624978 DOI: 10.1007/s00425-013-1884-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 04/09/2013] [Indexed: 05/28/2023]
Abstract
The identification, isolation and functional characterization of two genes encoding two monoterpene synthases-γ-terpinene synthase (Tctps2) and α-terpineol synthase (Tctps5)-from three chemically distinct Thymus caespititius (Lamiaceae) genotypes were performed. Genomic exon-intron structure was also determined for both terpene synthase genes, revealing an organization with seven exons and six introns. The cDNA of Tctps2 was 2,308 bp long and had an open reading frame of 1,794 bp encoding for a protein with 598 amino acids. Tctps5 was longer, mainly due to intron sequences, and presented high intraspecific variability on the plants analyzed. It encoded for a protein of 602 amino acids from an open reading frame of 1,806 bp comprising a total of 2,507 bp genomic sequence. The amino acid sequence of these two active Tctps genes shared 74 % pairwise identity, ranging between 42 and 94 % similarity with about 50 known terpene synthases of other Lamiaceae species. Gene expression revealed a multi-product Tctps2 and Tctps5 enzymes, producing γ-terpinene and α-terpineol as major components, respectively. These enzymatic results were consistent with the monoterpene profile present in T. caespititius field plants, suggesting a transcriptional regulation in leaves. Herewith reported for the first time for this species, these two newly characterized Tctps genes improve the understanding of the molecular mechanisms of reaction responsible for terpene biosynthesis and chemical diversity found in T. caespititius.
Collapse
Affiliation(s)
- A Sofia Lima
- Departmento de Biologia Vegetal, Faculdade de Ciências, Centro de Biotecnologia Vegetal, Instituto de Biotecnologia e Bioengenharia, Universidade de Lisboa, C2, Campo Grande, 1749-016 Lisbon, Portugal
| | | | | | | | | | | | | | | | | |
Collapse
|
719
|
Matarese F, Scalabrelli G, D Onofrio C. Analysis of the expression of terpene synthase genes in relation to aroma content in two aromatic Vitis vinifera varieties. FUNCTIONAL PLANT BIOLOGY : FPB 2013; 40:552-565. [PMID: 32481130 DOI: 10.1071/fp12326] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 01/22/2013] [Indexed: 05/23/2023]
Abstract
Grape (Vitis vinifera L.) flavour management in the vineyard requires knowledge of the derivation of individual flavour and aroma characteristics. Some of the most prevalent wine grape aroma constituents are terpenoids and this study represents a wide report about grape terpene synthase (TPS) gene transcript profiling in different tissues of two aromatic grapevine varieties, particularly flowers and developing berries, correlated with the accumulation patterns of free aroma compounds. All investigated genes belonging to the TPS-a and TPS-b subfamilies reached the highest expression in accordance with the peak of accumulation of the respective compounds. In the TPS-g subfamily, only one of the genes characterised for linalool synthases showed major transcript abundance in ripening berries, whereas the only geraniol synthase had a peak of expression in green berries and at the beginning of ripening, when geraniol concentration started to increase and overcome the linalool concentration. The genes identified in this study as being mainly responsible for linalool and geraniol synthesis during berry development, and the phenological phases in which they are mostly expressed, should be of interest to viticulturists and wine makers to improve decision making along the chain of production.
Collapse
Affiliation(s)
- Fabiola Matarese
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto, 80 I-56124 Pisa, Italy
| | - Giancarlo Scalabrelli
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto, 80 I-56124 Pisa, Italy
| | - Claudio D Onofrio
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto, 80 I-56124 Pisa, Italy
| |
Collapse
|
720
|
Matsuba Y, Nguyen TT, Wiegert K, Falara V, Gonzales-Vigil E, Leong B, Schäfer P, Kudrna D, Wing RA, Bolger AM, Usadel B, Tissier A, Fernie AR, Barry CS, Pichersky E. Evolution of a complex locus for terpene biosynthesis in solanum. THE PLANT CELL 2013; 25:2022-36. [PMID: 23757397 PMCID: PMC3723610 DOI: 10.1105/tpc.113.111013] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/30/2013] [Accepted: 05/17/2013] [Indexed: 05/18/2023]
Abstract
Functional gene clusters, containing two or more genes encoding different enzymes for the same pathway, are sometimes observed in plant genomes, most often when the genes specify the synthesis of specialized defensive metabolites. Here, we show that a cluster of genes in tomato (Solanum lycopersicum; Solanaceae) contains genes for terpene synthases (TPSs) that specify the synthesis of monoterpenes and diterpenes from cis-prenyl diphosphates, substrates that are synthesized by enzymes encoded by cis-prenyl transferase (CPT) genes also located within the same cluster. The monoterpene synthase genes in the cluster likely evolved from a diterpene synthase gene in the cluster by duplication and divergence. In the orthologous cluster in Solanum habrochaites, a new sesquiterpene synthase gene was created by a duplication event of a monoterpene synthase followed by a localized gene conversion event directed by a diterpene synthase gene. The TPS genes in the Solanum cluster encoding cis-prenyl diphosphate-utilizing enzymes are closely related to a tobacco (Nicotiana tabacum; Solanaceae) diterpene synthase encoding Z-abienol synthase (Nt-ABS). Nt-ABS uses the substrate copal-8-ol diphosphate, which is made from the all-trans geranylgeranyl diphosphate by copal-8-ol diphosphate synthase (Nt-CPS2). The Solanum gene cluster also contains an ortholog of Nt-CPS2, but it appears to encode a nonfunctional protein. Thus, the Solanum functional gene cluster evolved by duplication and divergence of TPS genes, together with alterations in substrate specificity to utilize cis-prenyl diphosphates and through the acquisition of CPT genes.
Collapse
Affiliation(s)
- Yuki Matsuba
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan 48109
| | - Thuong T.H. Nguyen
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan 48109
| | - Krystle Wiegert
- Department of Horticulture, Michigan State University, East Lansing, Michigan 48824
| | - Vasiliki Falara
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan 48109
| | | | - Bryan Leong
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan 48109
| | - Petra Schäfer
- Leibniz-Institute of Plant Biochemistry, Department of Cell and Metabolic Biology, 06120 Halle (Saale), Germany
| | - David Kudrna
- Arizona Genomics Institute, School of Plant Sciences, BIO5 Institute, University of Arizona, Tucson, Arizona 85721
| | - Rod A. Wing
- Arizona Genomics Institute, School of Plant Sciences, BIO5 Institute, University of Arizona, Tucson, Arizona 85721
| | - Anthony M. Bolger
- Max-Planck-Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
- Institut für Biologie 1, Botanik, Rheinisch-Westfälische Technische Hochschule Aachen University, 52062 Aachen, Germany
| | - Björn Usadel
- Max-Planck-Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
- Institut für Biologie 1, Botanik, Rheinisch-Westfälische Technische Hochschule Aachen University, 52062 Aachen, Germany
| | - Alain Tissier
- Leibniz-Institute of Plant Biochemistry, Department of Cell and Metabolic Biology, 06120 Halle (Saale), Germany
| | - Alisdair R. Fernie
- Max-Planck-Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Cornelius S. Barry
- Department of Horticulture, Michigan State University, East Lansing, Michigan 48824
| | - Eran Pichersky
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan 48109
- Address correspondence to
| |
Collapse
|
721
|
Zerbe P, Hamberger B, Yuen MM, Chiang A, Sandhu HK, Madilao LL, Nguyen A, Hamberger B, Bach SS, Bohlmann J. Gene discovery of modular diterpene metabolism in nonmodel systems. PLANT PHYSIOLOGY 2013; 162:1073-91. [PMID: 23613273 PMCID: PMC3668041 DOI: 10.1104/pp.113.218347] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 04/21/2013] [Indexed: 05/18/2023]
Abstract
Plants produce over 10,000 different diterpenes of specialized (secondary) metabolism, and fewer diterpenes of general (primary) metabolism. Specialized diterpenes may have functions in ecological interactions of plants with other organisms and also benefit humanity as pharmaceuticals, fragrances, resins, and other industrial bioproducts. Examples of high-value diterpenes are taxol and forskolin pharmaceuticals or ambroxide fragrances. Yields and purity of diterpenes obtained from natural sources or by chemical synthesis are often insufficient for large-volume or high-end applications. Improvement of agricultural or biotechnological diterpene production requires knowledge of biosynthetic genes and enzymes. However, specialized diterpene pathways are extremely diverse across the plant kingdom, and most specialized diterpenes are taxonomically restricted to a few plant species, genera, or families. Consequently, there is no single reference system to guide gene discovery and rapid annotation of specialized diterpene pathways. Functional diversification of genes and plasticity of enzyme functions of these pathways further complicate correct annotation. To address this challenge, we used a set of 10 different plant species to develop a general strategy for diterpene gene discovery in nonmodel systems. The approach combines metabolite-guided transcriptome resources, custom diterpene synthase (diTPS) and cytochrome P450 reference gene databases, phylogenies, and, as shown for select diTPSs, single and coupled enzyme assays using microbial and plant expression systems. In the 10 species, we identified 46 new diTPS candidates and over 400 putatively terpenoid-related P450s in a resource of nearly 1 million predicted transcripts of diterpene-accumulating tissues. Phylogenetic patterns of lineage-specific blooms of genes guided functional characterization.
Collapse
|
722
|
Hall DE, Yuen MMS, Jancsik S, Quesada AL, Dullat HK, Li M, Henderson H, Arango-Velez A, Liao NY, Docking RT, Chan SK, Cooke JEK, Breuil C, Jones SJM, Keeling CI, Bohlmann J. Transcriptome resources and functional characterization of monoterpene synthases for two host species of the mountain pine beetle, lodgepole pine (Pinus contorta) and jack pine (Pinus banksiana). BMC PLANT BIOLOGY 2013; 13:80. [PMID: 23679205 PMCID: PMC3668260 DOI: 10.1186/1471-2229-13-80] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 05/02/2013] [Indexed: 05/06/2023]
Abstract
BACKGROUND The mountain pine beetle (MPB, Dendroctonus ponderosae) epidemic has affected lodgepole pine (Pinus contorta) across an area of more than 18 million hectares of pine forests in western Canada, and is a threat to the boreal jack pine (Pinus banksiana) forest. Defence of pines against MPB and associated fungal pathogens, as well as other pests, involves oleoresin monoterpenes, which are biosynthesized by families of terpene synthases (TPSs). Volatile monoterpenes also serve as host recognition cues for MPB and as precursors for MPB pheromones. The genes responsible for terpene biosynthesis in jack pine and lodgepole pine were previously unknown. RESULTS We report the generation and quality assessment of assembled transcriptome resources for lodgepole pine and jack pine using Sanger, Roche 454, and Illumina sequencing technologies. Assemblies revealed transcripts for approximately 20,000 - 30,000 genes from each species and assembly analyses led to the identification of candidate full-length prenyl transferase, TPS, and P450 genes of oleoresin biosynthesis. We cloned and functionally characterized, via expression of recombinant proteins in E. coli, nine different jack pine and eight different lodgepole pine mono-TPSs. The newly identified lodgepole pine and jack pine mono-TPSs include (+)-α-pinene synthases, (-)-α-pinene synthases, (-)-β-pinene synthases, (+)-3-carene synthases, and (-)-β-phellandrene synthases from each of the two species. CONCLUSION In the absence of genome sequences, transcriptome assemblies are important for defence gene discovery in lodgepole pine and jack pine, as demonstrated here for the terpenoid pathway genes. The product profiles of the functionally annotated mono-TPSs described here can account for the major monoterpene metabolites identified in lodgepole pine and jack pine.
Collapse
Affiliation(s)
- Dawn E Hall
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Macaire M S Yuen
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Sharon Jancsik
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Alfonso Lara Quesada
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Harpreet K Dullat
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Maria Li
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Hannah Henderson
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Adriana Arango-Velez
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada
| | - Nancy Y Liao
- British Columbia Cancer Agency Genome Sciences Centre, Vancouver, British Columbia V5Z 4E6, Canada
| | - Roderick T Docking
- British Columbia Cancer Agency Genome Sciences Centre, Vancouver, British Columbia V5Z 4E6, Canada
| | - Simon K Chan
- British Columbia Cancer Agency Genome Sciences Centre, Vancouver, British Columbia V5Z 4E6, Canada
| | - Janice EK Cooke
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada
| | - Colette Breuil
- Department of Wood Sciences, University of British Columbia, 2424 Main Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Steven JM Jones
- British Columbia Cancer Agency Genome Sciences Centre, Vancouver, British Columbia V5Z 4E6, Canada
| | - Christopher I Keeling
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Jörg Bohlmann
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| |
Collapse
|
723
|
Zapata F, Fine PVA. Diversification of the monoterpene synthase gene family (TPSb) in Protium, a highly diverse genus of tropical trees. Mol Phylogenet Evol 2013; 68:432-42. [PMID: 23665037 DOI: 10.1016/j.ympev.2013.04.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2012] [Revised: 04/16/2013] [Accepted: 04/25/2013] [Indexed: 11/26/2022]
Abstract
Plant monoterpenes are a diverse class of secondary metabolites mediating biotic and abiotic interactions with direct effects on plant fitness. To evaluate the hypothesis that monoterpene diversity is related to functional diversification after gene duplication, we reconstructed the evolutionary history of monoterpene synthases (TPSb)--the genes underlying monoterpene synthesis--in Protium, a taxonomically and chemically diverse genus of tropical trees. We isolated multiple copies of TPSb genes from chemically divergent Protium species, reconstructed the phylogeny of this gene family, used maximum-likelihood estimation of selection coefficients, and inferred residues evolving under positive selection. We found evidence for one ancient and multiple more recent duplication events giving rise to three, and potentially five, copies of TPSb genes currently present in Protium. There was evidence for adaptive evolution in one copy with a positively selected residue likely involved in protein folding and product specificity. All other copies were inferred to be evolving under a combination of stabilizing and/or relaxed selection. Although gene copy number is consistent with the extensive phenotypic diversity in monoterpenes shown in Protium, selection analyses suggest that not all copies are undergoing divergent selection consistent with a coevolutionary arms race with enemies, but instead may be under stabilizing and relaxed selection consistent with signaling or physiological stress functionality.
Collapse
Affiliation(s)
- Felipe Zapata
- Department of Integrative Biology, University of California, Berkeley, CA 94720, USA.
| | | |
Collapse
|
724
|
Del Terra L, Lonzarich V, Asquini E, Navarini L, Graziosi G, Suggi Liverani F, Pallavicini A. Functional characterization of three Coffea arabica L. monoterpene synthases: insights into the enzymatic machinery of coffee aroma. PHYTOCHEMISTRY 2013; 89:6-14. [PMID: 23398891 DOI: 10.1016/j.phytochem.2013.01.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 01/17/2013] [Accepted: 01/18/2013] [Indexed: 06/01/2023]
Abstract
The chemical composition of the coffee beverage is extremely complex, being made up of hundreds of volatile and non-volatile compounds, many of which are generated in the thermal reactions that occur during the roasting process. However, in the raw coffee bean there are also compounds that survive roasting and are therefore extracted into the beverage. Monoterpenes are an example of this category, as their presence has been reported in the coffee flower, fruit, seed, roasted bean and in the beverage aroma. The present work describes the isolation, heterologous expression and functional characterization of three Coffea arabica cDNAs coding for monoterpene synthases. RNA was purified from C. arabica (cv. Catuai Red) flowers, seeds and fruits at 4 successive ripening stages. Degenerate primers were designed on the most conserved regions of the monoterpene synthase gene family, and then used to isolate monoterpene synthase-like sequences from the cDNA libraries. After 5'- and 3'-RACE, the complete transcripts of 4 putative C. arabica monoterpene synthases (CofarTPS) were obtained. Gene expression in different tissues and developmental stages was analysed. After heterologous expression in Escherichia coli, enzyme activity and substrate specificity were evaluated in vitro by incubation of the recombinant proteins with geranyl pyrophosphate (GPP), geranylgeranyl pyrophosphate (GGPP) and farnesyl pyrophosphate (FPP), precursors respectively of mono-, di- and sesquiterpenes. The reaction products were characterized by HS-SPME GC-MS. CofarTPS1 was classified as a limonene synthase gene, while CofarTPS2 and 3 showed lower activity with the production of linalool and β-myrcene.
Collapse
|
725
|
Pirie CM, De Mey M, Prather KLJ, Ajikumar PK. Integrating the protein and metabolic engineering toolkits for next-generation chemical biosynthesis. ACS Chem Biol 2013; 8:662-72. [PMID: 23373985 DOI: 10.1021/cb300634b] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Through microbial engineering, biosynthesis has the potential to produce thousands of chemicals used in everyday life. Metabolic engineering and synthetic biology are fields driven by the manipulation of genes, genetic regulatory systems, and enzymatic pathways for developing highly productive microbial strains. Fundamentally, it is the biochemical characteristics of the enzymes themselves that dictate flux through a biosynthetic pathway toward the product of interest. As metabolic engineers target sophisticated secondary metabolites, there has been little recognition of the reduced catalytic activity and increased substrate/product promiscuity of the corresponding enzymes compared to those of central metabolism. Thus, fine-tuning these enzymatic characteristics through protein engineering is paramount for developing high-productivity microbial strains for secondary metabolites. Here, we describe the importance of protein engineering for advancing metabolic engineering of secondary metabolism pathways. This pathway integrated enzyme optimization can enhance the collective toolkit of microbial engineering to shape the future of chemical manufacturing.
Collapse
Affiliation(s)
- Christopher M. Pirie
- Manus Biosynthesis Inc., Suite 102, 790 Memorial Drive, Cambridge, Massachusetts 02139,
United States
| | - Marjan De Mey
- Manus Biosynthesis Inc., Suite 102, 790 Memorial Drive, Cambridge, Massachusetts 02139,
United States
- Centre of
Expertise−Industrial Biotechnology and Biocatalysis, Ghent University, Coupure links 653, 9000 Ghent, Belgium
| | - Kristala L. Jones Prather
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts
02139, United States
| | - Parayil Kumaran Ajikumar
- Manus Biosynthesis Inc., Suite 102, 790 Memorial Drive, Cambridge, Massachusetts 02139,
United States
| |
Collapse
|
726
|
Xiao M, Zhang Y, Chen X, Lee EJ, Barber CJS, Chakrabarty R, Desgagné-Penix I, Haslam TM, Kim YB, Liu E, MacNevin G, Masada-Atsumi S, Reed DW, Stout JM, Zerbe P, Zhang Y, Bohlmann J, Covello PS, De Luca V, Page JE, Ro DK, Martin VJJ, Facchini PJ, Sensen CW. Transcriptome analysis based on next-generation sequencing of non-model plants producing specialized metabolites of biotechnological interest. J Biotechnol 2013; 166:122-34. [PMID: 23602801 DOI: 10.1016/j.jbiotec.2013.04.004] [Citation(s) in RCA: 141] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 04/04/2013] [Accepted: 04/05/2013] [Indexed: 10/27/2022]
Abstract
Plants produce a vast array of specialized metabolites, many of which are used as pharmaceuticals, flavors, fragrances, and other high-value fine chemicals. However, most of these compounds occur in non-model plants for which genomic sequence information is not yet available. The production of a large amount of nucleotide sequence data using next-generation technologies is now relatively fast and cost-effective, especially when using the latest Roche-454 and Illumina sequencers with enhanced base-calling accuracy. To investigate specialized metabolite biosynthesis in non-model plants we have established a data-mining framework, employing next-generation sequencing and computational algorithms, to construct and analyze the transcriptomes of 75 non-model plants that produce compounds of interest for biotechnological applications. After sequence assembly an extensive annotation approach was applied to assign functional information to over 800,000 putative transcripts. The annotation is based on direct searches against public databases, including RefSeq and InterPro. Gene Ontology (GO), Enzyme Commission (EC) annotations and associated Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway maps are also collected. As a proof-of-concept, the selection of biosynthetic gene candidates associated with six specialized metabolic pathways is described. A web-based BLAST server has been established to allow public access to assembled transcriptome databases for all 75 plant species of the PhytoMetaSyn Project (www.phytometasyn.ca).
Collapse
Affiliation(s)
- Mei Xiao
- Department of Biochemistry and Molecular Biology, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta T2N 4N1, Canada
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
727
|
Metabolomic analysis of methyl jasmonate-induced triterpenoid production in the medicinal herb Centella asiatica (L.) urban. Molecules 2013; 18:4267-81. [PMID: 23579994 PMCID: PMC6270148 DOI: 10.3390/molecules18044267] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 04/03/2013] [Accepted: 04/03/2013] [Indexed: 02/07/2023] Open
Abstract
Centella asiatica is an important source of biologically active pentacyclic triterpenoids. The enhancement of the biosynthesis of the centellosides by manipulation of associated metabolic pathways is receiving much attention. Jasmonates play critical roles in plant metabolism by up-regulating the expression of genes related to secondary metabolites. Here, we investigated the effect of methyl jasmonate (MeJa) in C. asiatica through targeted metabolomic profiling of asiaticoside and madecassoside as well as their aglycones, asiatic acid and madecassic acid. Cell suspensions were treated with 0.2 mM MeJa for 2, 4 and 6 days. Liquid chromatography coupled to mass spectrometry (LC-MS) was used to explore induced changes in metabolite profiles, both qualitatively and quantitatively. Principal component analysis (PCA)-derived scores plots revealed clusters of sample replicates for control and treated samples at 2, 4 and 6 days while loading plots aided in identifying signatory biomarkers (asiatic acid and madecassic acid, as well as asiaticoside and madecassoside) that clearly demonstrate the variability between samples. In addition to increased biosynthesis of the targeted centelloids, other differential changes in the intracellular metabolite profiles reflected the response of the C. asiatica cells to the MeJa-treatment as a reprogramming of the metabolome.
Collapse
|
728
|
Foster AJ, Hall DE, Mortimer L, Abercromby S, Gries R, Gries G, Bohlmann J, Russell J, Mattsson J. Identification of genes in Thuja plicata foliar terpenoid defenses. PLANT PHYSIOLOGY 2013; 161:1993-2004. [PMID: 23388118 PMCID: PMC3613470 DOI: 10.1104/pp.112.206383] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Thuja plicata (western redcedar) is a long-lived conifer species whose foliage is rarely affected by disease or insect pests, but can be severely damaged by ungulate browsing. Deterrence to browsing correlates with high foliar levels of terpenoids, in particular the monoterpenoid α-thujone. Here, we set out to identify genes whose products may be involved in the production of α-thujone and other terpenoids in this species. First, we generated a foliar transcriptome database from which to draw candidate genes. Second, we mapped the storage of thujones and other terpenoids to foliar glands. Third, we used global expression profiling to identify more than 600 genes that are expressed at high levels in foliage with glands, but can either not be detected or are expressed at low levels in a natural variant lacking foliar glands. Fourth, we used in situ RNA hybridization to map the expression of a putative monoterpene synthase to the epithelium of glands and used enzyme assays with recombinant protein of the same gene to show that it produces sabinene, the monoterpene precursor of α-thujone. Finally, we identified candidate genes with predicted enzymatic functions for the conversion of sabinene to α-thujone. Taken together, this approach generated both general resources and detailed functional characterization in the identification of genes of foliar terpenoid biosynthesis in T. plicata.
Collapse
|
729
|
Müller A, Faubert P, Hagen M, Zu Castell W, Polle A, Schnitzler JP, Rosenkranz M. Volatile profiles of fungi--chemotyping of species and ecological functions. Fungal Genet Biol 2013; 54:25-33. [PMID: 23474123 DOI: 10.1016/j.fgb.2013.02.005] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 02/13/2013] [Accepted: 02/14/2013] [Indexed: 01/07/2023]
Abstract
Fungi emit a large spectrum of volatile organic compounds (VOCs). In the present study, we characterized and compared the odor profiles of ectomycorrhizal (EM), pathogenic and saprophytic fungal species with the aim to use these patterns as a chemotyping tool. Volatiles were collected from the headspace of eight fungal species including nine strains (four EM, three pathogens and two saprophytes) using the stir bar sorptive extraction method and analyzed by gas chromatography-mass spectrometry (GC-MS). After removal of VOCs released from the growth system, 54 VOCs were detected including 15 novel compounds not reported in fungi before. Principle component and cluster analyses revealed that fungal species differ in their odor profiles, particularly in the pattern of sesquiterpenes. The functional groups and species could be chemotyped by using their specific emission patterns. The different ecological groups could be predicted with probabilities of 90-99%, whereas for the individual species the probabilities varied between 55% and 83%. This study strongly supports the concept that the profiling of volatile compounds can be used for non-invasive identification of different functional fungal groups.
Collapse
Affiliation(s)
- Anna Müller
- Büsgen Institute, Forest Botany and Tree Physiology, University of Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
| | | | | | | | | | | | | |
Collapse
|
730
|
Monson RK, Jones RT, Rosenstiel TN, Schnitzler JP. Why only some plants emit isoprene. PLANT, CELL & ENVIRONMENT 2013; 36:503-16. [PMID: 22998549 DOI: 10.1111/pce.12015] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Isoprene (2-methyl-1,3-butadiene) is emitted from many plants and it appears to have an adaptive role in protecting leaves from abiotic stress. However, only some species emit isoprene. Isoprene emission has appeared and been lost many times independently during the evolution of plants. As an example, our phylogenetic analysis shows that isoprene emission is likely ancestral within the family Fabaceae (= Leguminosae), but that it has been lost at least 16 times and secondarily gained at least 10 times through independent evolutionary events. Within the division Pteridophyta (ferns), we conservatively estimate that isoprene emissions have been gained five times and lost two times through independent evolutionary events. Within the genus Quercus (oaks), isoprene emissions have been lost from one clade, but replaced by a novel type of light-dependent monoterpene emissions that uses the same metabolic pathways and substrates as isoprene emissions. This novel type of monoterpene emissions has appeared at least twice independently within Quercus, and has been lost from 9% of the individuals within a single population of Quercus suber. Gain and loss of gene function for isoprene synthase is possible through relatively few mutations. Thus, this trait appears frequently in lineages; but, once it appears, the time available for evolutionary radiation into environments that select for the trait is short relative to the time required for mutations capable of producing a non-functional isoprene synthase gene. The high frequency of gains and losses of the trait and its heterogeneous taxonomic distribution in plants may be explained by the relatively few mutations necessary to produce or lose the isoprene synthase gene combined with the assumption that isoprene emission is advantageous in a narrow range of environments and phenotypes.
Collapse
Affiliation(s)
- Russell K Monson
- School of Natural Resources and the Environment and Laboratory for Tree Ring Research, University of Arizona, Tucson, AZ 85721, USA.
| | | | | | | |
Collapse
|
731
|
Vaughan MM, Wang Q, Webster FX, Kiemle D, Hong YJ, Tantillo DJ, Coates RM, Wray AT, Askew W, O’Donnell C, Tokuhisa JG, Tholl D. Formation of the unusual semivolatile diterpene rhizathalene by the Arabidopsis class I terpene synthase TPS08 in the root stele is involved in defense against belowground herbivory. THE PLANT CELL 2013; 25:1108-25. [PMID: 23512856 PMCID: PMC3634680 DOI: 10.1105/tpc.112.100057] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2012] [Revised: 01/13/2013] [Accepted: 03/01/2013] [Indexed: 05/20/2023]
Abstract
Secondary metabolites are major constituents of plant defense against herbivore attack. Relatively little is known about the cell type-specific formation and antiherbivore activities of secondary compounds in roots despite the substantial impact of root herbivory on plant performance and fitness. Here, we describe the constitutive formation of semivolatile diterpenes called rhizathalenes by the class I terpene synthase (TPS) 08 in roots of Arabidopsis thaliana. The primary enzymatic product of TPS08, rhizathalene A, which is produced from the substrate all-trans geranylgeranyl diphosphate, represents a so far unidentified class of tricyclic diterpene carbon skeletons with an unusual tricyclic spiro-hydrindane structure. Protein targeting and administration of stable isotope precursors indicate that rhizathalenes are biosynthesized in root leucoplasts. TPS08 expression is largely localized to the root stele, suggesting a centric and gradual release of its diterpene products into the peripheral root cell layers. We demonstrate that roots of Arabidopsis tps08 mutant plants, grown aeroponically and in potting substrate, are more susceptible to herbivory by the opportunistic root herbivore fungus gnat (Bradysia spp) and suffer substantial removal of peripheral tissue at larval feeding sites. Our work provides evidence for the in vivo role of semivolatile diterpene metabolites as local antifeedants in belowground direct defense against root-feeding insects.
Collapse
Affiliation(s)
- Martha M. Vaughan
- Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia 24061
| | - Qiang Wang
- Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia 24061
| | - Francis X. Webster
- Department of Chemistry, State University of New York–Environmental Science and Forestry, Syracuse, New York 13210
| | - Dave Kiemle
- Department of Chemistry, State University of New York–Environmental Science and Forestry, Syracuse, New York 13210
| | - Young J. Hong
- Department of Chemistry, University of California, Davis, California 95616
| | - Dean J. Tantillo
- Department of Chemistry, University of California, Davis, California 95616
| | - Robert M. Coates
- Department of Chemistry, University of Illinois, Urbana, Illinois 61801
| | - Austin T. Wray
- Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia 24061
| | - Whitnee Askew
- Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia 24061
| | | | - James G. Tokuhisa
- Department of Horticulture, Virginia Tech, Blacksburg, Virginia 24061
| | - Dorothea Tholl
- Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia 24061
| |
Collapse
|
732
|
Padovan A, Keszei A, Foley WJ, Külheim C. Differences in gene expression within a striking phenotypic mosaic Eucalyptus tree that varies in susceptibility to herbivory. BMC PLANT BIOLOGY 2013; 13:29. [PMID: 23421644 PMCID: PMC3599227 DOI: 10.1186/1471-2229-13-29] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Accepted: 01/04/2013] [Indexed: 05/20/2023]
Abstract
BACKGROUND Long-lived trees can accumulate mutations throughout their lifetimes that may influence biotic and abiotic interactions. For example, some Eucalyptus trees display marked variation in herbivore defence within a single canopy. These "mosaic" trees support foliage with distinct chemotypes which are differentially favoured by insect and vertebrate herbivores, resulting in susceptible and resistant branches within a single canopy. These mosaic trees provide a unique opportunity to explore the biosynthesis and genetic regulation of chemical defences in the foliage. The biosynthesis of the principal defence compounds, terpenoid-dominated essential oils, is well understood. However, the regulation of the genes involved and thus the control of phenotypic variation within a single tree canopy remains a mystery. RESULTS We sequenced the transcriptomes of the leaves of the two different chemotypes of a chemically mosaic Eucalyptus melliodora tree using 454 pyrosequencing technology. We used gene set enrichment analysis to identify differentially expressed transcripts and found the proportion of differentially expressed genes in the resistant and susceptible foliage similar to the transcript difference between functionally distinct tissues of the same organism, for example roots and leaves. We also investigated sequence differences in the form of single nucleotide polymorphisms and found 10 nucleotides that were different between the two branches. These are likely true SNPs and several occur in regulatory genes. CONCLUSION We found three lines of evidence that suggest changes to a 'master switch' can result in large scale phenotypic changes: 1. We found differential expression of terpene biosynthetic genes between the two chemotypes that could contribute to chemical variation within this plant. 2. We identified many genes that are differentially expressed between the two chemotypes, including some unique genes in each branch. These genes are involved in a variety of processes within the plant and many could contribute to the regulation of secondary metabolism, thus contributing to the chemical variation. 3. We identified 10 SNPs, some of which occur in regulatory genes that could influence secondary metabolism and thus contribute to chemical variation. Whilst this research is inherently limited by sample size, the patterns we describe could be indicative of other plant genetic mosaics.
Collapse
Affiliation(s)
- Amanda Padovan
- Research School of Biology, Australian National University, Gould Wing, Building No. 116, ACT 0200, Canberra, Australia
| | - Andras Keszei
- Research School of Biology, Australian National University, Gould Wing, Building No. 116, ACT 0200, Canberra, Australia
| | - William J Foley
- Research School of Biology, Australian National University, Gould Wing, Building No. 116, ACT 0200, Canberra, Australia
| | - Carsten Külheim
- Research School of Biology, Australian National University, Gould Wing, Building No. 116, ACT 0200, Canberra, Australia
| |
Collapse
|
733
|
Hall DE, Zerbe P, Jancsik S, Quesada AL, Dullat H, Madilao LL, Yuen M, Bohlmann J. Evolution of conifer diterpene synthases: diterpene resin acid biosynthesis in lodgepole pine and jack pine involves monofunctional and bifunctional diterpene synthases. PLANT PHYSIOLOGY 2013; 161:600-16. [PMID: 23370714 PMCID: PMC3561007 DOI: 10.1104/pp.112.208546] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Diterpene resin acids (DRAs) are major components of pine (Pinus spp.) oleoresin. They play critical roles in conifer defense against insects and pathogens and as a renewable resource for industrial bioproducts. The core structures of DRAs are formed in secondary (i.e. specialized) metabolism via cycloisomerization of geranylgeranyl diphosphate (GGPP) by diterpene synthases (diTPSs). Previously described gymnosperm diTPSs of DRA biosynthesis are bifunctional enzymes that catalyze the initial bicyclization of GGPP followed by rearrangement of a (+)-copalyl diphosphate intermediate at two discrete class II and class I active sites. In contrast, similar diterpenes of gibberellin primary (i.e. general) metabolism are produced by the consecutive activity of two monofunctional class II and class I diTPSs. Using high-throughput transcriptome sequencing, we discovered 11 diTPS from jack pine (Pinus banksiana) and lodgepole pine (Pinus contorta). Three of these were orthologous to known conifer bifunctional levopimaradiene/abietadiene synthases. Surprisingly, two sets of orthologous PbdiTPSs and PcdiTPSs were monofunctional class I enzymes that lacked functional class II active sites and converted (+)-copalyl diphosphate, but not GGPP, into isopimaradiene and pimaradiene as major products. Diterpene profiles and transcriptome sequences of lodgepole pine and jack pine are consistent with roles for these diTPSs in DRA biosynthesis. The monofunctional class I diTPSs of DRA biosynthesis form a new clade within the gymnosperm-specific TPS-d3 subfamily that evolved from bifunctional diTPS rather than monofunctional enzymes (TPS-c and TPS-e) of gibberellin metabolism. Homology modeling suggested alterations in the class I active site that may have contributed to their functional specialization relative to other conifer diTPSs.
Collapse
|
734
|
Lange BM, Ahkami A. Metabolic engineering of plant monoterpenes, sesquiterpenes and diterpenes--current status and future opportunities. PLANT BIOTECHNOLOGY JOURNAL 2013; 11:169-96. [PMID: 23171352 DOI: 10.1111/pbi.12022] [Citation(s) in RCA: 114] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 10/05/2012] [Accepted: 10/08/2012] [Indexed: 05/03/2023]
Abstract
Terpenoids (a.k.a. isoprenoids) represent the most diverse class of natural products found in plants, with tens of thousands of reported structures. Plant-derived terpenoids have a multitude of pharmaceutical and industrial applications, but the natural resources for their extraction are often limited and, in many cases, synthetic routes are not commercially viable. Some of the most valuable terpenoids are not accumulated in model plants or crops, and genetic resources for breeding of terpenoid natural product traits are thus poorly developed. At present, metabolic engineering, either in the native producer or a heterologous host, is the only realistic alternative to improve yield and accessibility. In this review article, we will evaluate the state of the art of modulating the biosynthetic pathways for the production of mono-, sesqui- and diterpenes in plants.
Collapse
Affiliation(s)
- B Markus Lange
- Institute of Biological Chemistry and MJ Murdock Metabolomics Laboratory, Washington State University, Pullman, WA, USA.
| | | |
Collapse
|
735
|
Nieuwenhuizen NJ, Green SA, Chen X, Bailleul EJ, Matich AJ, Wang MY, Atkinson RG. Functional genomics reveals that a compact terpene synthase gene family can account for terpene volatile production in apple. PLANT PHYSIOLOGY 2013; 161:787-804. [PMID: 23256150 PMCID: PMC3561019 DOI: 10.1104/pp.112.208249] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Accepted: 12/09/2012] [Indexed: 05/04/2023]
Abstract
Terpenes are specialized plant metabolites that act as attractants to pollinators and as defensive compounds against pathogens and herbivores, but they also play an important role in determining the quality of horticultural food products. We show that the genome of cultivated apple (Malus domestica) contains 55 putative terpene synthase (TPS) genes, of which only 10 are predicted to be functional. This low number of predicted functional TPS genes compared with other plant species was supported by the identification of only eight potentially functional TPS enzymes in apple 'Royal Gala' expressed sequence tag databases, including the previously characterized apple (E,E)-α-farnesene synthase. In planta functional characterization of these TPS enzymes showed that they could account for the majority of terpene volatiles produced in cv Royal Gala, including the sesquiterpenes germacrene-D and (E)-β-caryophyllene, the monoterpenes linalool and α-pinene, and the homoterpene (E)-4,8-dimethyl-1,3,7-nonatriene. Relative expression analysis of the TPS genes indicated that floral and vegetative tissues were the primary sites of terpene production in cv Royal Gala. However, production of cv Royal Gala floral-specific terpenes and TPS genes was observed in the fruit of some heritage apple cultivars. Our results suggest that the apple TPS gene family has been shaped by a combination of ancestral and more recent genome-wide duplication events. The relatively small number of functional enzymes suggests that the remaining terpenes produced in floral and vegetative and fruit tissues are maintained under a positive selective pressure, while the small number of terpenes found in the fruit of modern cultivars may be related to commercial breeding strategies.
Collapse
Affiliation(s)
| | | | - Xiuyin Chen
- New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland, New Zealand (N.J.N., S.A.G., X.C., E.J.D.B., M.Y.W., R.G.A.)
- New Zealand Institute for Plant and Food Research Limited, Private Bag 11600, Palmerston North, New Zealand (A.J.M.)
| | - Estelle J.D. Bailleul
- New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland, New Zealand (N.J.N., S.A.G., X.C., E.J.D.B., M.Y.W., R.G.A.)
- New Zealand Institute for Plant and Food Research Limited, Private Bag 11600, Palmerston North, New Zealand (A.J.M.)
| | - Adam J. Matich
- New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland, New Zealand (N.J.N., S.A.G., X.C., E.J.D.B., M.Y.W., R.G.A.)
- New Zealand Institute for Plant and Food Research Limited, Private Bag 11600, Palmerston North, New Zealand (A.J.M.)
| | - Mindy Y. Wang
- New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland, New Zealand (N.J.N., S.A.G., X.C., E.J.D.B., M.Y.W., R.G.A.)
- New Zealand Institute for Plant and Food Research Limited, Private Bag 11600, Palmerston North, New Zealand (A.J.M.)
| | - Ross G. Atkinson
- New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland, New Zealand (N.J.N., S.A.G., X.C., E.J.D.B., M.Y.W., R.G.A.)
- New Zealand Institute for Plant and Food Research Limited, Private Bag 11600, Palmerston North, New Zealand (A.J.M.)
| |
Collapse
|
736
|
Cooper L, Walls RL, Elser J, Gandolfo MA, Stevenson DW, Smith B, Preece J, Athreya B, Mungall CJ, Rensing S, Hiss M, Lang D, Reski R, Berardini TZ, Li D, Huala E, Schaeffer M, Menda N, Arnaud E, Shrestha R, Yamazaki Y, Jaiswal P. The plant ontology as a tool for comparative plant anatomy and genomic analyses. PLANT & CELL PHYSIOLOGY 2013; 54:e1. [PMID: 23220694 PMCID: PMC3583023 DOI: 10.1093/pcp/pcs163] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The Plant Ontology (PO; http://www.plantontology.org/) is a publicly available, collaborative effort to develop and maintain a controlled, structured vocabulary ('ontology') of terms to describe plant anatomy, morphology and the stages of plant development. The goals of the PO are to link (annotate) gene expression and phenotype data to plant structures and stages of plant development, using the data model adopted by the Gene Ontology. From its original design covering only rice, maize and Arabidopsis, the scope of the PO has been expanded to include all green plants. The PO was the first multispecies anatomy ontology developed for the annotation of genes and phenotypes. Also, to our knowledge, it was one of the first biological ontologies that provides translations (via synonyms) in non-English languages such as Japanese and Spanish. As of Release #18 (July 2012), there are about 2.2 million annotations linking PO terms to >110,000 unique data objects representing genes or gene models, proteins, RNAs, germplasm and quantitative trait loci (QTLs) from 22 plant species. In this paper, we focus on the plant anatomical entity branch of the PO, describing the organizing principles, resources available to users and examples of how the PO is integrated into other plant genomics databases and web portals. We also provide two examples of comparative analyses, demonstrating how the ontology structure and PO-annotated data can be used to discover the patterns of expression of the LEAFY (LFY) and terpene synthase (TPS) gene homologs.
Collapse
Affiliation(s)
- Laurel Cooper
- Department of Botany and Plant Pathology, Oregon State University, 2082 Cordley Hall, Corvallis, OR 97331-2902, USA
- These authors contributed equally to this work
- These authors contributed equally to the development of the Plant Ontology
| | - Ramona L. Walls
- New York Botanical Garden, 2900 Southern Blvd., Bronx, NY 10458-5126, USA
- These authors contributed equally to this work
- These authors contributed equally to the development of the Plant Ontology
| | - Justin Elser
- Department of Botany and Plant Pathology, Oregon State University, 2082 Cordley Hall, Corvallis, OR 97331-2902, USA
- These authors contributed equally to the development of the Plant Ontology
| | - Maria A. Gandolfo
- L.H. Bailey Hortorium, Department of Plant Biology, Cornell University, 412 Mann Library Building, Ithaca, NY 14853, USA
- These authors contributed equally to the development of the Plant Ontology
| | - Dennis W. Stevenson
- New York Botanical Garden, 2900 Southern Blvd., Bronx, NY 10458-5126, USA
- These authors contributed equally to the development of the Plant Ontology
| | - Barry Smith
- Department of Philosophy, University at Buffalo, 126 Park Hall, Buffalo, NY 14260, USA
- These authors contributed equally to the development of the Plant Ontology
| | - Justin Preece
- Department of Botany and Plant Pathology, Oregon State University, 2082 Cordley Hall, Corvallis, OR 97331-2902, USA
| | - Balaji Athreya
- Department of Botany and Plant Pathology, Oregon State University, 2082 Cordley Hall, Corvallis, OR 97331-2902, USA
| | - Christopher J. Mungall
- Berkeley Bioinformatics Open-Source Projects, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mailstop 64-121, Berkeley, CA 94720, USA
| | - Stefan Rensing
- Faculty of Biology and BIOSS Centre for Biological Signalling Studies, University of Freiburg, Schänzlestr. 1, D-79104 Freiburg, Germany
| | - Manuel Hiss
- Faculty of Biology and BIOSS Centre for Biological Signalling Studies, University of Freiburg, Schänzlestr. 1, D-79104 Freiburg, Germany
| | - Daniel Lang
- Plant Biotechnology, Faculty of Biology, University of Freiburg, Germany
| | - Ralf Reski
- Plant Biotechnology, Faculty of Biology, University of Freiburg, Germany
- FRIAS - Freiburg Institute for Advanced Studies, University of Freiburg, Freiburg, Germany
| | - Tanya Z. Berardini
- Department of Plant Biology, Carnegie Institution for Science, Stanford, CA 94305, USA
| | - Donghui Li
- Department of Plant Biology, Carnegie Institution for Science, Stanford, CA 94305, USA
| | - Eva Huala
- Department of Plant Biology, Carnegie Institution for Science, Stanford, CA 94305, USA
| | - Mary Schaeffer
- Agriculture Research Services, United States Department of Agriculture, Columbia, MO 65211, USA
- Division of Plant Sciences, Department of Agronomy, University of Missouri, Columbia, MO 65211, USA
| | - Naama Menda
- Boyce Thompson Institute for Plant Research, 533 Tower Road, Ithaca, NY 148533, USA
| | - Elizabeth Arnaud
- Bioversity International, via dei Tre Denari, 174/a, Maccarese, Rome, Italy
| | - Rosemary Shrestha
- Genetic Resources Program, Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Apdo. Postal 6-641, 06600 Mexico, D.F., Mexico
| | - Yukiko Yamazaki
- Center for Genetic Resource Information, National Institute of Genetics, Mishima, Shizuoka, 411-8540 Japan
| | - Pankaj Jaiswal
- Department of Botany and Plant Pathology, Oregon State University, 2082 Cordley Hall, Corvallis, OR 97331-2902, USA
- These authors contributed equally to the development of the Plant Ontology
- *Corresponding author: E-mail,: ; Fax, +1-541-737-3573
| |
Collapse
|
737
|
Pineda A, Soler R, Weldegergis BT, Shimwela MM, VAN Loon JJA, Dicke M. Non-pathogenic rhizobacteria interfere with the attraction of parasitoids to aphid-induced plant volatiles via jasmonic acid signalling. PLANT, CELL & ENVIRONMENT 2013; 36:393-404. [PMID: 22812443 DOI: 10.1111/j.1365-3040.2012.02581.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Beneficial soil-borne microbes, such as mycorrhizal fungi or rhizobacteria, can affect the interactions of plants with aboveground insects at several trophic levels. While the mechanisms of interactions with herbivorous insects, that is, the second trophic level, are starting to be understood, it remains unknown how plants mediate the interactions between soil microbes and carnivorous insects, that is, the third trophic level. Using Arabidopsis thaliana Col-0 and the aphid Myzus persicae, we evaluate here the underlying mechanisms involved in the plant-mediated interaction between the non-pathogenic rhizobacterium Pseudomonas fluorescens and the parasitoid Diaeretiella rapae, by combining ecological, chemical and molecular approaches. Rhizobacterial colonization modifies the composition of the blend of herbivore-induced plant volatiles. The volatile blend from rhizobacteria-treated aphid-infested plants is less attractive to an aphid parasitoid, in terms of both olfactory preference behaviour and oviposition, than the volatile blend from aphid-infested plants without rhizobacteria. Importantly, the effect of rhizobacteria on both the emission of herbivore-induced volatiles and parasitoid response to aphid-infested plants is lost in an Arabidopsis mutant (aos/dde2-2) that is impaired in jasmonic acid production. By modifying the blend of herbivore-induced plant volatiles that depend on the jasmonic acid-signalling pathway, root-colonizing microbes interfere with the attraction of parasitoids of leaf herbivores.
Collapse
Affiliation(s)
- Ana Pineda
- Laboratory of Entomology, Wageningen University, PO Box 8031, 6700 EH Wageningen, The Netherlands.
| | | | | | | | | | | |
Collapse
|
738
|
Demissie ZA, Erland LAE, Rheault MR, Mahmoud SS. The biosynthetic origin of irregular monoterpenes in Lavandula: isolation and biochemical characterization of a novel cis-prenyl diphosphate synthase gene, lavandulyl diphosphate synthase. J Biol Chem 2013; 288:6333-41. [PMID: 23306202 DOI: 10.1074/jbc.m112.431171] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Lavender essential oils are constituted predominantly of regular monoterpenes, for example linalool, 1,8-cineole, and camphor. However, they also contain irregular monoterpenes including lavandulol and lavandulyl acetate. Although the majority of genes responsible for the production of regular monoterpenes in lavenders are now known, enzymes (including lavandulyl diphosphate synthase (LPPS)) catalyzing the biosynthesis of irregular monoterpenes in these plants have not been described. Here, we report the isolation and functional characterization of a novel cis-prenyl diphosphate synthase cDNA, termed Lavandula x intermedia lavandulyl diphosphate synthase (LiLPPS), through a homology-based cloning strategy. The LiLPPS ORF, encoding for a 305-amino acid long protein, was expressed in Escherichia coli, and the recombinant protein was purified by nickel-nitrilotriacetic acid affinity chromatography. The approximately 34.5-kDa bacterially produced protein specifically catalyzed the head-to-middle condensation of two dimethylallyl diphosphate units to LPP in vitro with apparent Km and kcat values of 208 ± 12 μm and 0.1 s(-1), respectively. LiLPPS is a homodimeric enzyme with a sigmoidal saturation curve and Hill coefficient of 2.7, suggesting a positive co-operative interaction among its catalytic sites. LiLPPS could be used to modulate the production of lavandulol and its derivatives in plants through metabolic engineering.
Collapse
Affiliation(s)
- Zerihun A Demissie
- Department of Biology, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | | | | | | |
Collapse
|
739
|
Hamberger B, Bak S. Plant P450s as versatile drivers for evolution of species-specific chemical diversity. Philos Trans R Soc Lond B Biol Sci 2013; 368:20120426. [PMID: 23297350 DOI: 10.1098/rstb.2012.0426] [Citation(s) in RCA: 193] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The irreversible nature of reactions catalysed by P450s makes these enzymes landmarks in the evolution of plant metabolic pathways. Founding members of P450 families are often associated with general (i.e. primary) metabolic pathways, restricted to single copy or very few representatives, indicative of purifying selection. Recruitment of those and subsequent blooms into multi-member gene families generates genetic raw material for functional diversification, which is an inherent characteristic of specialized (i.e. secondary) metabolism. However, a growing number of highly specialized P450s from not only the CYP71 clan indicate substantial contribution of convergent and divergent evolution to the observed general and specialized metabolite diversity. We will discuss examples of how the genetic and functional diversification of plant P450s drives chemical diversity in light of plant evolution. Even though it is difficult to predict the function or substrate of a P450 based on sequence similarity, grouping with a family or subfamily in phylogenetic trees can indicate association with metabolism of particular classes of compounds. Examples will be given that focus on multi-member gene families of P450s involved in the metabolic routes of four classes of specialized metabolites: cyanogenic glucosides, glucosinolates, mono- to triterpenoids and phenylpropanoids.
Collapse
Affiliation(s)
- Björn Hamberger
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C, 1871 Copenhagen, Denmark.
| | | |
Collapse
|
740
|
Fischer MJC, Meyer S, Claudel P, Steyer D, Bergdoll M, Hugueney P. Determination of amino-acidic positions important for <i>Ocimum basilicum</i> geraniol synthase activity. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/abb.2013.42033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
741
|
Kovalchuk A, Keriö S, Oghenekaro AO, Jaber E, Raffaello T, Asiegbu FO. Antimicrobial defenses and resistance in forest trees: challenges and perspectives in a genomic era. ANNUAL REVIEW OF PHYTOPATHOLOGY 2013; 51:221-44. [PMID: 23682916 DOI: 10.1146/annurev-phyto-082712-102307] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Molecular pathology of forest trees for a long time lagged behind parallel studies on agricultural crop pathology. Recent technological advances have significantly contributed to the observed progress in this field. The first powerful impulse was provided by the completion of the black cottonwood genome sequence in 2006. Genomes of several other important tree species will be completed within a short time. Simultaneously, application of transcriptomics and next-generation sequencing (NGS) has resulted in the rapid accumulation of a vast amount of data on molecular interactions between trees and their microbial parasites. This review provides an overview of our current knowledge about these responses of forest trees to their pathogens, highlighting the achievements of the past decade, discussing the current state of the field, and emphasizing the prospects and challenges for the near future.
Collapse
Affiliation(s)
- Andriy Kovalchuk
- Department of Forest Sciences, Forest Pathology Research Laboratory, University of Helsinki, 00014 Helsinki, Finland.
| | | | | | | | | | | |
Collapse
|
742
|
Simkin AJ, Miettinen K, Claudel P, Burlat V, Guirimand G, Courdavault V, Papon N, Meyer S, Godet S, St-Pierre B, Giglioli-Guivarc'h N, Fischer MJC, Memelink J, Clastre M. Characterization of the plastidial geraniol synthase from Madagascar periwinkle which initiates the monoterpenoid branch of the alkaloid pathway in internal phloem associated parenchyma. PHYTOCHEMISTRY 2013; 85:36-43. [PMID: 23102596 DOI: 10.1016/j.phytochem.2012.09.014] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Revised: 09/21/2012] [Accepted: 09/26/2012] [Indexed: 05/21/2023]
Abstract
Madagascar periwinkle (Catharanthus roseus [L.] G. Don, Apocynaceae) produces monoterpene indole alkaloids (MIAs), secondary metabolites of high interest due to their therapeutic value. A key step in the biosynthesis is the generation of geraniol from geranyl diphosphate (GPP) in the monoterpenoid branch of the MIA pathway. Here we report on the cloning and functional characterization of C. roseus geraniol synthase (CrGES). The full-length CrGES was over-expressed in Escherichia coli and the purified recombinant protein catalyzed the conversion of GPP into geraniol with a K(m) value of 58.5 μM for GPP. In vivo CrGES activity was evaluated by heterologous expression in a Saccharomyces cerevisiae strain mutated in the farnesyl diphosphate synthase gene. Analysis of culture extracts by gas chromatography-mass spectrometry confirmed the excretion of geraniol into the growth medium. Transient transformation of C. roseus cells with a Yellow Fluorescent Protein-fusion construct revealed that CrGES is localized in plastid stroma and stromules. In aerial plant organs, RNA in situ hybridization showed specific labeling of CrGES transcripts in the internal phloem associated parenchyma as observed for other characterized genes involved in the early steps of MIA biosynthesis. Finally, when cultures of Catharanthus cells were treated with the alkaloid-inducing hormone methyl jasmonate, an increase in CrGES transcript levels was observed. This observation coupled with the tissue-specific expression and the subcellular compartmentalization support the idea that CrGES initiates the monoterpenoid branch of the MIA biosynthetic pathway.
Collapse
Affiliation(s)
- Andrew J Simkin
- Université François-Rabelais, EA2106, Biomolécules et Biotechnologies Végétales, 31 Avenue Monge, 37200 Tours, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
743
|
Yeo YS, Nybo SE, Chittiboyina AG, Weerasooriya AD, Wang YH, Góngora-Castillo E, Vaillancourt B, Buell CR, DellaPenna D, Celiz MD, Jones AD, Wurtele ES, Ransom N, Dudareva N, Shaaban KA, Tibrewal N, Chandra S, Smillie T, Khan IA, Coates RM, Watt DS, Chappell J. Functional identification of valerena-1,10-diene synthase, a terpene synthase catalyzing a unique chemical cascade in the biosynthesis of biologically active sesquiterpenes in Valeriana officinalis. J Biol Chem 2012; 288:3163-73. [PMID: 23243312 DOI: 10.1074/jbc.m112.415836] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Valerian is an herbal preparation from the roots of Valeriana officinalis used as an anxiolytic and sedative and in the treatment of insomnia. The biological activities of valerian are attributed to valerenic acid and its putative biosynthetic precursor valerenadiene, sesquiterpenes, found in V. officinalis roots. These sesquiterpenes retain an isobutenyl side chain whose origin has been long recognized as enigmatic because a chemical rationalization for their biosynthesis has not been obvious. Using recently developed metabolomic and transcriptomic resources, we identified seven V. officinalis terpene synthase genes (VoTPSs), two that were functionally characterized as monoterpene synthases and three that preferred farnesyl diphosphate, the substrate for sesquiterpene synthases. The reaction products for two of the sesquiterpene synthases exhibiting root-specific expression were characterized by a combination of GC-MS and NMR in comparison to the terpenes accumulating in planta. VoTPS7 encodes for a synthase that biosynthesizes predominately germacrene C, whereas VoTPS1 catalyzes the conversion of farnesyl diphosphate to valerena-1,10-diene. Using a yeast expression system, specific labeled [(13)C]acetate, and NMR, we investigated the catalytic mechanism for VoTPS1 and provide evidence for the involvement of a caryophyllenyl carbocation, a cyclobutyl intermediate, in the biosynthesis of valerena-1,10-diene. We suggest a similar mechanism for the biosynthesis of several other biologically related isobutenyl-containing sesquiterpenes.
Collapse
Affiliation(s)
- Yun-Soo Yeo
- Plant Biology Program, University of Kentucky, Lexington, Kentucky 40503, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
744
|
Glas JJ, Schimmel BCJ, Alba JM, Escobar-Bravo R, Schuurink RC, Kant MR. Plant glandular trichomes as targets for breeding or engineering of resistance to herbivores. Int J Mol Sci 2012; 13:17077-103. [PMID: 23235331 PMCID: PMC3546740 DOI: 10.3390/ijms131217077] [Citation(s) in RCA: 227] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 11/28/2012] [Accepted: 12/05/2012] [Indexed: 11/16/2022] Open
Abstract
Glandular trichomes are specialized hairs found on the surface of about 30% of all vascular plants and are responsible for a significant portion of a plant's secondary chemistry. Glandular trichomes are an important source of essential oils, i.e., natural fragrances or products that can be used by the pharmaceutical industry, although many of these substances have evolved to provide the plant with protection against herbivores and pathogens. The storage compartment of glandular trichomes usually is located on the tip of the hair and is part of the glandular cell, or cells, which are metabolically active. Trichomes and their exudates can be harvested relatively easily, and this has permitted a detailed study of their metabolites, as well as the genes and proteins responsible for them. This knowledge now assists classical breeding programs, as well as targeted genetic engineering, aimed to optimize trichome density and physiology to facilitate customization of essential oil production or to tune biocide activity to enhance crop protection. We will provide an overview of the metabolic diversity found within plant glandular trichomes, with the emphasis on those of the Solanaceae, and of the tools available to manipulate their activities for enhancing the plant's resistance to pests.
Collapse
Affiliation(s)
- Joris J. Glas
- Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, 1098 XH Science Park 904, Amsterdam, The Netherlands; E-Mails: (J.J.G.); (B.C.J.S.); (J.M.A.)
| | - Bernardus C. J. Schimmel
- Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, 1098 XH Science Park 904, Amsterdam, The Netherlands; E-Mails: (J.J.G.); (B.C.J.S.); (J.M.A.)
| | - Juan M. Alba
- Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, 1098 XH Science Park 904, Amsterdam, The Netherlands; E-Mails: (J.J.G.); (B.C.J.S.); (J.M.A.)
| | - Rocío Escobar-Bravo
- Department of Plant Breeding, Subtropical and Mediterranean Horticulture Institute “La Mayora” (IHSM), Spanish Council for Scientific Research (CSIC), Experimental Station “La Mayora”, E-29750, Algarrobo-Costa, Málaga, Spain; E-Mail:
| | - Robert C. Schuurink
- Department of Plant Physiology, Swammerdam Institute of Life Sciences, 1098 XH, Science Park 904, Amsterdam, The Netherlands; E-Mail:
| | - Merijn R. Kant
- Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, 1098 XH Science Park 904, Amsterdam, The Netherlands; E-Mails: (J.J.G.); (B.C.J.S.); (J.M.A.)
| |
Collapse
|
745
|
Molecular cloning and functional characterization of borneol dehydrogenase from the glandular trichomes of Lavandula x intermedia. Arch Biochem Biophys 2012; 528:163-70. [DOI: 10.1016/j.abb.2012.09.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 09/28/2012] [Accepted: 09/29/2012] [Indexed: 11/21/2022]
|
746
|
Zhou K, Xu M, Tiernan M, Xie Q, Toyomasu T, Sugawara C, Oku M, Usui M, Mitsuhashi W, Chono M, Chandler PM, Peters RJ. Functional characterization of wheat ent-kaurene(-like) synthases indicates continuing evolution of labdane-related diterpenoid metabolism in the cereals. PHYTOCHEMISTRY 2012; 84:47-55. [PMID: 23009879 PMCID: PMC3483413 DOI: 10.1016/j.phytochem.2012.08.021] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 07/30/2012] [Accepted: 08/29/2012] [Indexed: 05/18/2023]
Abstract
Wheat (Triticum aestivum) and rice (Oryza sativa) are two of the most agriculturally important cereal crop plants. Rice is known to produce numerous diterpenoid natural products that serve as phytoalexins and/or allelochemicals. Specifically, these are labdane-related diterpenoids, derived from a characteristic labdadienyl/copalyl diphosphate (CPP), whose biosynthetic relationship to gibberellin biosynthesis is evident from the relevant expanded and functionally diverse family of ent-kaurene synthase-like (KSL) genes found in rice the (OsKSLs). Herein reported is the biochemical characterization of a similarly expansive family of KSL from wheat (the TaKSLs). In particular, beyond ent-kaurene synthases (KS), wheat also contains several biochemically diversified KSLs. These react either with the ent-CPP intermediate common to gibberellin biosynthesis or with the normal stereoisomer of CPP that also is found in wheat (as demonstrated by the accompanying paper describing the wheat CPP synthases). Comparison with a barley (Hordeum vulgare) KS indicates conservation of monocot KS, with early and continued expansion and functional diversification of KSLs in at least the small grain cereals. In addition, some of the TaKSLs that utilize normal CPP also will react with syn-CPP, echoing previous findings with the OsKSL family, with such enzymatic promiscuity/elasticity providing insight into the continuing evolution of diterpenoid metabolism in the cereal crop plant family, as well as more generally, which is discussed here.
Collapse
Affiliation(s)
- Ke Zhou
- Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, IA 50011, U.S.A
| | - Meimei Xu
- Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, IA 50011, U.S.A
| | - Mollie Tiernan
- Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, IA 50011, U.S.A
| | - Qian Xie
- Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, IA 50011, U.S.A
| | - Tomonobu Toyomasu
- Department of Bioresource Engineering, Yamagata University, Tsuruoka, Yamagata, 997-8555, Japan
| | - Chizu Sugawara
- Department of Bioresource Engineering, Yamagata University, Tsuruoka, Yamagata, 997-8555, Japan
| | - Madoka Oku
- Department of Bioresource Engineering, Yamagata University, Tsuruoka, Yamagata, 997-8555, Japan
| | - Masami Usui
- Department of Bioresource Engineering, Yamagata University, Tsuruoka, Yamagata, 997-8555, Japan
| | - Wataru Mitsuhashi
- Department of Bioresource Engineering, Yamagata University, Tsuruoka, Yamagata, 997-8555, Japan
| | - Makiko Chono
- NARO Institute of Crop Science, Kannondai, Tsukuba, 305-8518, Japan
| | | | - Reuben J. Peters
- Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, IA 50011, U.S.A
- Corresponding author: Tel.: 1-515-294-8580, Fax: 1-515-294-0453,
| |
Collapse
|
747
|
An alternative route to cyclic terpenes by reductive cyclization in iridoid biosynthesis. Nature 2012; 492:138-42. [PMID: 23172143 DOI: 10.1038/nature11692] [Citation(s) in RCA: 222] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2012] [Accepted: 10/19/2012] [Indexed: 11/08/2022]
Abstract
The iridoids comprise a large family of distinctive bicyclic monoterpenes that possess a wide range of pharmacological activities, including anticancer, anti-inflammatory, antifungal and antibacterial activities. Additionally, certain iridoids are used as sex pheromones in agriculturally important species of aphids, a fact that has underpinned innovative and integrated pest management strategies. To harness the biotechnological potential of this natural product class, the enzymes involved in the biosynthetic pathway must be elucidated. Here we report the discovery of iridoid synthase, a plant-derived enzyme that generates the iridoid ring scaffold, as evidenced by biochemical assays, gene silencing, co-expression analysis and localization studies. In contrast to all known monoterpene cyclases, which use geranyl diphosphate as substrate and invoke a cationic intermediate, iridoid synthase uses the linear monoterpene 10-oxogeranial as substrate and probably couples an initial NAD(P)H-dependent reduction step with a subsequent cyclization step via a Diels-Alder cycloaddition or a Michael addition. Our results illustrate how a short-chain reductase was recruited as cyclase for the production of iridoids in medicinal plants. Furthermore, we highlight the prospects of using unrelated reductases to generate artificial cyclic scaffolds. Beyond the recognition of an alternative biochemical mechanism for the biosynthesis of cyclic terpenes, we anticipate that our work will enable the large-scale heterologous production of iridoids in plants and microorganisms for agricultural and pharmaceutical applications.
Collapse
|
748
|
Improved herbivore resistance in cultivated tomato with the sesquiterpene biosynthetic pathway from a wild relative. Proc Natl Acad Sci U S A 2012; 109:20124-9. [PMID: 23169639 DOI: 10.1073/pnas.1208756109] [Citation(s) in RCA: 136] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Tomato breeding has been tremendously efficient in increasing fruit quality and quantity but did not focus on improving herbivore resistance. The biosynthetic pathway for the production of 7-epizingiberene in a wild tomato was introduced into a cultivated greenhouse variety with the aim to obtain herbivore resistance. 7-Epizingiberene is a specific sesquiterpene with toxic and repellent properties that is produced and stored in glandular trichomes. We identified 7-epizingiberene synthase (ShZIS) that belongs to a new class of sesquiterpene synthases, exclusively using Z-Z-farnesyl-diphosphate (zFPP) in plastids, probably arisen through neo-functionalization of a common ancestor. Expression of the ShZIS and zFPP synthases in the glandular trichomes of cultivated tomato resulted in the production of 7-epizingiberene. These tomatoes gained resistance to several herbivores that are pests of tomato. Hence, introduction of this sesquiterpene biosynthetic pathway into cultivated tomatoes resulted in improved herbivore resistance.
Collapse
|
749
|
Schalk M, Pastore L, Mirata MA, Khim S, Schouwey M, Deguerry F, Pineda V, Rocci L, Daviet L. Toward a Biosynthetic Route to Sclareol and Amber Odorants. J Am Chem Soc 2012; 134:18900-3. [DOI: 10.1021/ja307404u] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michel Schalk
- Biotechnology Department, Corporate R&D Division, FIRMENICH SA, Geneva CH-1211, Switzerland
| | - Laurence Pastore
- Biotechnology Department, Corporate R&D Division, FIRMENICH SA, Geneva CH-1211, Switzerland
| | - Marco A. Mirata
- Biotechnology Department, Corporate R&D Division, FIRMENICH SA, Geneva CH-1211, Switzerland
| | - Samretthy Khim
- Biotechnology Department, Corporate R&D Division, FIRMENICH SA, Geneva CH-1211, Switzerland
| | - Marina Schouwey
- Biotechnology Department, Corporate R&D Division, FIRMENICH SA, Geneva CH-1211, Switzerland
| | - Fabienne Deguerry
- Biotechnology Department, Corporate R&D Division, FIRMENICH SA, Geneva CH-1211, Switzerland
| | - Virginia Pineda
- Biotechnology Department, Corporate R&D Division, FIRMENICH SA, Geneva CH-1211, Switzerland
| | - Letizia Rocci
- Biotechnology Department, Corporate R&D Division, FIRMENICH SA, Geneva CH-1211, Switzerland
| | - Laurent Daviet
- Biotechnology Department, Corporate R&D Division, FIRMENICH SA, Geneva CH-1211, Switzerland
| |
Collapse
|
750
|
Molnár I, Lopez D, Wisecaver JH, Devarenne TP, Weiss TL, Pellegrini M, Hackett JD. Bio-crude transcriptomics: gene discovery and metabolic network reconstruction for the biosynthesis of the terpenome of the hydrocarbon oil-producing green alga, Botryococcus braunii race B (Showa). BMC Genomics 2012; 13:576. [PMID: 23110428 PMCID: PMC3533583 DOI: 10.1186/1471-2164-13-576] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Accepted: 10/19/2012] [Indexed: 12/16/2022] Open
Abstract
Background Microalgae hold promise for yielding a biofuel feedstock that is sustainable, carbon-neutral, distributed, and only minimally disruptive for the production of food and feed by traditional agriculture. Amongst oleaginous eukaryotic algae, the B race of Botryococcus braunii is unique in that it produces large amounts of liquid hydrocarbons of terpenoid origin. These are comparable to fossil crude oil, and are sequestered outside the cells in a communal extracellular polymeric matrix material. Biosynthetic engineering of terpenoid bio-crude production requires identification of genes and reconstruction of metabolic pathways responsible for production of both hydrocarbons and other metabolites of the alga that compete for photosynthetic carbon and energy. Results A de novo assembly of 1,334,609 next-generation pyrosequencing reads form the Showa strain of the B race of B. braunii yielded a transcriptomic database of 46,422 contigs with an average length of 756 bp. Contigs were annotated with pathway, ontology, and protein domain identifiers. Manual curation allowed the reconstruction of pathways that produce terpenoid liquid hydrocarbons from primary metabolites, and pathways that divert photosynthetic carbon into tetraterpenoid carotenoids, diterpenoids, and the prenyl chains of meroterpenoid quinones and chlorophyll. Inventories of machine-assembled contigs are also presented for reconstructed pathways for the biosynthesis of competing storage compounds including triacylglycerol and starch. Regeneration of S-adenosylmethionine, and the extracellular localization of the hydrocarbon oils by active transport and possibly autophagy are also investigated. Conclusions The construction of an annotated transcriptomic database, publicly available in a web-based data depository and annotation tool, provides a foundation for metabolic pathway and network reconstruction, and facilitates further omics studies in the absence of a genome sequence for the Showa strain of B. braunii, race B. Further, the transcriptome database empowers future biosynthetic engineering approaches for strain improvement and the transfer of desirable traits to heterologous hosts.
Collapse
Affiliation(s)
- István Molnár
- Natural Products Center, School of Natural Resources and the Environment, The University of Arizona, Tucson, 85739, USA.
| | | | | | | | | | | | | |
Collapse
|