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Bergman ME, Kortbeek RWJ, Gutensohn M, Dudareva N. Plant terpenoid biosynthetic network and its multiple layers of regulation. Prog Lipid Res 2024; 95:101287. [PMID: 38906423 DOI: 10.1016/j.plipres.2024.101287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 06/13/2024] [Accepted: 06/17/2024] [Indexed: 06/23/2024]
Abstract
Terpenoids constitute one of the largest and most chemically diverse classes of primary and secondary metabolites in nature with an exceptional breadth of functional roles in plants. Biosynthesis of all terpenoids begins with the universal five‑carbon building blocks, isopentenyl diphosphate (IPP) and its allylic isomer dimethylallyl diphosphate (DMAPP), which in plants are derived from two compartmentally separated but metabolically crosstalking routes, the mevalonic acid (MVA) and methylerythritol phosphate (MEP) pathways. Here, we review the current knowledge on the terpenoid precursor pathways and highlight the critical hidden constraints as well as multiple regulatory mechanisms that coordinate and homeostatically govern carbon flux through the terpenoid biosynthetic network in plants.
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Affiliation(s)
- Matthew E Bergman
- Department of Biochemistry, Purdue University, West Lafayette, IN, United States; Purdue Center for Plant Biology, Purdue University, West Lafayette, IN, United States
| | - Ruy W J Kortbeek
- Department of Biochemistry, Purdue University, West Lafayette, IN, United States; Purdue Center for Plant Biology, Purdue University, West Lafayette, IN, United States
| | - Michael Gutensohn
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV, United States
| | - Natalia Dudareva
- Department of Biochemistry, Purdue University, West Lafayette, IN, United States; Purdue Center for Plant Biology, Purdue University, West Lafayette, IN, United States; Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, United States.
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2
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Dötterl S, Gershenzon J. Chemistry, biosynthesis and biology of floral volatiles: roles in pollination and other functions. Nat Prod Rep 2023; 40:1901-1937. [PMID: 37661854 DOI: 10.1039/d3np00024a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Covering: 2010 to 2023Floral volatiles are a chemically diverse group of plant metabolites that serve multiple functions. Their composition is shaped by environmental, ecological and evolutionary factors. This review will summarize recent advances in floral scent research from chemical, molecular and ecological perspectives. It will focus on the major chemical classes of floral volatiles, on notable new structures, and on recent discoveries regarding the biosynthesis and the regulation of volatile emission. Special attention will be devoted to the various functions of floral volatiles, not only as attractants for different types of pollinators, but also as defenses of flowers against enemies. We will also summarize recent findings on how floral volatiles are affected by abiotic stressors, such as increased temperatures and drought, and by other organisms, such as herbivores and flower-dwelling microbes. Finally, this review will indicate current research gaps, such as the very limited knowledge of the isomeric pattern of chiral compounds and its importance in interspecific interactions.
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Affiliation(s)
- Stefan Dötterl
- Department of Environment & Biodiversity, Paris Lodron University Salzburg, Hellbrunnerstr 34, 5020 Salzburg, Austria.
| | - Jonathan Gershenzon
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745 Jena, Germany.
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3
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Ling Z, Li J, Dong Y, Zhang W, Bai H, Li S, Wang S, Li H, Shi L. Terpene produced by coexpression of the TPS and P450 genes from Lavandula angustifolia protects plants from herbivore attacks during budding stages. BMC PLANT BIOLOGY 2023; 23:477. [PMID: 37807036 PMCID: PMC10561503 DOI: 10.1186/s12870-023-04490-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 09/26/2023] [Indexed: 10/10/2023]
Abstract
To deter herbivore attacks, plants employ a diverse array of volatile compounds, particularly during the early developmental stages. The highly expressed genes LaTPS7, LaTPS8, and LaCYP71D582 were identified during the budding phases of Lavandula angustifolia. In vitro studies revealed that LaTPS7 generated nine distinct compounds, including camphene, myrcene, and limonene. LaTPS8 enzymatically converted eight volatiles by utilizing geranyl diphosphate and nerolidyl diphosphate as substrates. Overexpression of plastid-localized LaTPS7 in Nicotiana benthamiana resulted in the production of limonene. Furthermore, the endoplasmic reticulum-associated enzyme LaCYP71D582 potentially converted limonene into carveol. In N. benthamiana, LaTPS8 is responsible for the synthesis of α-pinene and sylvestrene. Furthermore, leaves transfected with LaTPS7 and leaves cotransfected with LaTPS7 and LaCYP71D582 exhibited a repellent effect on aphids, with an approximate rate of 70%. In comparison, leaves with an empty vector displayed a repellent rate of approximately 20%. Conversely, tobacco leaves expressing LaTPS7 attracted ladybugs at a rate of 48.33%, while leaves coexpressing LaTPS7 and LaCYP71D582 attracted ladybugs at a slightly higher rate of 58.33%. Subsequent authentic standard tests confirmed that limonene and carveol repel Myzus persicae while attracting Harmonia axyridis. The promoter activity of LaTPS7 and LaCYP71D582 was evaluated in Arabidopsis thaliana using GUS staining, and it was observed that wounding stimulated the expression of LaTPS7. The volatile compounds produced by LaTPS7, LaTPS8, and LaCYP71D582 play a crucial role in plant defence mechanisms. In practical applications, employing biological control measures based on plant-based approaches can promote human and environmental health.
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Affiliation(s)
- Zhengyi Ling
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- China National Botanical Garden, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jingrui Li
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- China National Botanical Garden, Beijing, 100093, China
| | - Yanmei Dong
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- China National Botanical Garden, Beijing, 100093, China
| | - Wenying Zhang
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- China National Botanical Garden, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hongtong Bai
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- China National Botanical Garden, Beijing, 100093, China
| | - Shu Li
- Institute of Plant and Environment Protection, Beijing Academy of Agricultural and Forestry Science, Beijing, 100097, China
| | - Su Wang
- Institute of Plant and Environment Protection, Beijing Academy of Agricultural and Forestry Science, Beijing, 100097, China
| | - Hui Li
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
- China National Botanical Garden, Beijing, 100093, China.
| | - Lei Shi
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
- China National Botanical Garden, Beijing, 100093, China.
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4
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Lan Y, Zhang K, Wang L, Liang X, Liu H, Zhang X, Jiang N, Wu M, Yan H, Xiang Y. The R2R3-MYB transcription factor OfMYB21 positively regulates linalool biosynthesis in Osmanthus fragrans flowers. Int J Biol Macromol 2023; 249:126099. [PMID: 37543267 DOI: 10.1016/j.ijbiomac.2023.126099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/02/2023] [Accepted: 07/22/2023] [Indexed: 08/07/2023]
Abstract
Osmanthus fragrans is a well-known landscape ornamental tree species for its pleasing floral fragrance and abundance of flowers. Linalool, the core floral volatiles of O. fragrans, has tremendous economic value in the pharmaceuticals, cleaning products and cosmetics industries. However, the transcriptional regulatory network for the biosynthesis of linalool in O. fragrans remains unclear. Here, OfMYB21, a potential transcription factor regulating the linalool synthetase OfTPS2, was identified using RNA-seq data and qRT-PCR analysis. Yeast one-hybrid, dual-luciferase and EMSA showed that OfMYB21 directly binds to the promoter of OfTPS2 and activates its expression. Overexpression of OfMYB21 in the petals of O. fragrans led to up-regulation of OfTPS2 and increased accumulation of linalool, while silencing of OfMYB21 led to down-regulation of OfTPS2 and decreased biosynthesis of linalool. Subsequently, yeast two-hybrid, pull-down and BiFC experiments showed that OfMYB21 interacts with JA signaling factors OfJAZ2/3 and OfMYC2. Interestingly, the interaction between OfMYC2 and OfMYB21 further enhanced the transcription of OfTPS2, whereas OfJAZ3 attenuated this effect. Overall, our studies provided novel finding on the regulatory mechanisms responsible for the biosynthesis of the volatile monoterpenoid linalool in O. fragrans.
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Affiliation(s)
- Yangang Lan
- Laboratory of Tree Genetics and Molecular Breeding, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China
| | - Kaimei Zhang
- National Engineering Laboratory of Crop Stress Resistance Breeding, College of Life Sciences, Anhui Agricultural University, Hefei 230036, China
| | - Linna Wang
- Laboratory of Tree Genetics and Molecular Breeding, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China
| | - Xiaoyu Liang
- Laboratory of Tree Genetics and Molecular Breeding, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China
| | - Honxia Liu
- Laboratory of Tree Genetics and Molecular Breeding, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China
| | - Xiaoyue Zhang
- Laboratory of Tree Genetics and Molecular Breeding, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China
| | - Nianqin Jiang
- Laboratory of Tree Genetics and Molecular Breeding, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China
| | - Min Wu
- Laboratory of Tree Genetics and Molecular Breeding, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China
| | - Hanwei Yan
- Laboratory of Tree Genetics and Molecular Breeding, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China
| | - Yan Xiang
- Laboratory of Tree Genetics and Molecular Breeding, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China.
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Zhou Y, He W, He Y, Chen Q, Gao Y, Geng J, Zhu ZR. Formation of 8-hydroxylinalool in tea plant Camellia sinensis var. Assamica 'Hainan dayezhong'. FOOD CHEMISTRY. MOLECULAR SCIENCES 2023; 6:100173. [PMID: 37284067 PMCID: PMC10240414 DOI: 10.1016/j.fochms.2023.100173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/20/2023] [Accepted: 05/27/2023] [Indexed: 06/08/2023]
Abstract
Linalool and its derivatives contribute greatly to tea aroma. Here, 8-hydroxylinalool was found to be one of the major linalool-derived aroma compounds in Camellia sinensis var. assamica 'Hainan dayezhong', a tea plant grown in Hainan Province, China. Both (Z)-8-hydroxylinalool and (E)-8-hydroxylinalool were detected, and the E type was the main compound. Its content fluctuated in different months and was the highest in the buds compared with other tissues. CsCYP76B1 and CsCYP76T1, located in the endoplasmic reticulum, were identified to catalyze the formation of 8-hydroxylinalool from linalool in the tea plant. During withering of black tea manufacturing, the content of both (Z)-8-hydroxylinalool and (E)-8-hydroxylinalool significantly increased. Further study suggested that jasmonate induced gene expression of CsCYP76B1 and CsCYP76T1, and the accumulated precursor linalool may also contribute to 8-hydroxylinalool accumulation. Thus, this study not only reveals 8-hydroxylinalool biosynthesis in tea plants but also sheds light on aroma formation in black tea.
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Affiliation(s)
- Ying Zhou
- Hainan Institute, Zhejiang University, Yazhou District, Sanya 572025, China
| | - Wei He
- Hainan Institute, Zhejiang University, Yazhou District, Sanya 572025, China
- College of Agriculture and Biotechnology, Zhejiang University, Xihu District, Hangzhou 310030, China
| | - Yunchuan He
- Hainan Institute, Zhejiang University, Yazhou District, Sanya 572025, China
- College of Agriculture and Biotechnology, Zhejiang University, Xihu District, Hangzhou 310030, China
| | - Qiulin Chen
- Hainan Institute, Zhejiang University, Yazhou District, Sanya 572025, China
- College of Agriculture and Biotechnology, Zhejiang University, Xihu District, Hangzhou 310030, China
| | - Yang Gao
- Hainan Institute, Zhejiang University, Yazhou District, Sanya 572025, China
- College of Agriculture and Biotechnology, Zhejiang University, Xihu District, Hangzhou 310030, China
| | - Jiamei Geng
- Hainan Institute, Zhejiang University, Yazhou District, Sanya 572025, China
- College of Agriculture and Biotechnology, Zhejiang University, Xihu District, Hangzhou 310030, China
| | - Zeng-Rong Zhu
- Hainan Institute, Zhejiang University, Yazhou District, Sanya 572025, China
- College of Agriculture and Biotechnology, Zhejiang University, Xihu District, Hangzhou 310030, China
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Zhang Z, Wu QY, Ge Y, Huang ZY, Hong R, Li A, Xu JH, Yu HL. Hydroxylases involved in terpenoid biosynthesis: a review. BIORESOUR BIOPROCESS 2023; 10:39. [PMID: 38647640 PMCID: PMC10992849 DOI: 10.1186/s40643-023-00656-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 06/10/2023] [Indexed: 04/25/2024] Open
Abstract
Terpenoids are pervasive in nature and display an immense structural diversity. As the largest category of plant secondary metabolites, terpenoids have important socioeconomic value in the fields of pharmaceuticals, spices, and food manufacturing. The biosynthesis of terpenoid skeletons has made great progress, but the subsequent modifications of the terpenoid framework are poorly understood, especially for the functionalization of inert carbon skeleton usually catalyzed by hydroxylases. Hydroxylase is a class of enzymes that plays an important role in the modification of terpenoid backbone. This review article outlines the research progress in the identification, molecular modification, and functional expression of this class of enzymes in the past decade, which are profitable for the discovery, engineering, and application of more hydroxylases involved in the plant secondary metabolism.
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Affiliation(s)
- Zihan Zhang
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, East China University of Science and Technology, Shanghai, 200237, China
| | - Qing-Yang Wu
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, East China University of Science and Technology, Shanghai, 200237, China
| | - Yue Ge
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, East China University of Science and Technology, Shanghai, 200237, China
| | - Zheng-Yu Huang
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, East China University of Science and Technology, Shanghai, 200237, China
| | - Ran Hong
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Aitao Li
- School of Life Sciences, State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, 430062, China
| | - Jian-He Xu
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, East China University of Science and Technology, Shanghai, 200237, China
| | - Hui-Lei Yu
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, East China University of Science and Technology, Shanghai, 200237, China.
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7
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Lanier ER, Andersen TB, Hamberger B. Plant terpene specialized metabolism: complex networks or simple linear pathways? THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 114:1178-1201. [PMID: 36891828 PMCID: PMC11166267 DOI: 10.1111/tpj.16177] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/28/2023] [Accepted: 03/06/2023] [Indexed: 05/31/2023]
Abstract
From the perspectives of pathway evolution, discovery and engineering of plant specialized metabolism, the nature of the biosynthetic routes represents a critical aspect. Classical models depict biosynthesis typically from an end-point angle and as linear, for example, connecting central and specialized metabolism. As the number of functionally elucidated routes increased, the enzymatic foundation of complex plant chemistries became increasingly well understood. The perception of linear pathway models has been severely challenged. With a focus on plant terpenoid specialized metabolism, we review here illustrative examples supporting that plants have evolved complex networks driving chemical diversification. The completion of several diterpene, sesquiterpene and monoterpene routes shows complex formation of scaffolds and their subsequent functionalization. These networks show that branch points, including multiple sub-routes, mean that metabolic grids are the rule rather than the exception. This concept presents significant implications for biotechnological production.
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Affiliation(s)
| | | | - Björn Hamberger
- Department of Biochemistry and Molecular Biology, Michigan State University, Molecular Plant Sciences Building, 1066 Bogue Street, East Lansing, Michigan, 48824, USA
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Zhang Y, Ma L, Su P, Huang L, Gao W. Cytochrome P450s in plant terpenoid biosynthesis: discovery, characterization and metabolic engineering. Crit Rev Biotechnol 2023; 43:1-21. [PMID: 34865579 DOI: 10.1080/07388551.2021.2003292] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
As the largest family of natural products, terpenoids play valuable roles in medicine, agriculture, cosmetics and food. However, the traditional methods that rely on direct extraction from the original plants not only produce low yields, but also result in waste of resources, and are not applicable at all to endangered species. Modern heterologous biosynthesis is considered a promising, efficient, and sustainable production method, but it relies on the premise of a complete analysis of the biosynthetic pathway of terpenoids, especially the functionalization processes involving downstream cytochrome P450s. In this review, we systematically introduce the biotech approaches used to discover and characterize plant terpenoid-related P450s in recent years. In addition, we propose corresponding metabolic engineering approaches to increase the effective expression of P450 and improve the yield of terpenoids, and also elaborate on metabolic engineering strategies and examples of heterologous biosynthesis of terpenoids in Saccharomyces cerevisiae and plant hosts. Finally, we provide perspectives for the biotech approaches to be developed for future research on terpenoid-related P450.
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Affiliation(s)
- Yifeng Zhang
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China.,School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Lin Ma
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Ping Su
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida, USA
| | - Luqi Huang
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, Chinese Academy of Chinese Medical Sciences, Beijing, China
| | - Wei Gao
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China.,School of Traditional Chinese Medicine, Capital Medical University, Beijing, China.,Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China
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Li S, Zhang L, Sun M, Lv M, Yang Y, Xu W, Wang L. Biogenesis of flavor-related linalool is diverged and genetically conserved in tree peony ( Paeonia × suffruticosa). HORTICULTURE RESEARCH 2023; 10:uhac253. [PMID: 36751271 PMCID: PMC9896599 DOI: 10.1093/hr/uhac253] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 11/15/2022] [Indexed: 06/18/2023]
Abstract
Floral scent is an important and genetically complex trait in horticultural plants. Tree peony (Paeonia × suffruticosa) originates in the Pan-Himalaya and has nine wild species divided into two subsections, Delavayanae and Vaginatae. Their flowers are beloved worldwide for their sweet floral fragrance, yet the flavor-related volatiles and underlying biosynthetic pathways remain unknown. Here, we characterized the volatile blends of all wild tree peony species and found that the flavor-related volatiles were highly divergent, but linalool was a unique monoterpene in subsect. Delavayanae. Further detection of volatiles in 97 cultivars with various genetic backgrounds showed that linalool was also the characteristic aroma component in Paeonia delavayi hybrid progenies, suggesting that linalool was conserved and dominant within subsect. Delavayanae and its hybrids, instead of species and cultivars from subsect. Vaginatae. Global transcriptome analysis of all wild tree peony species and 60 cultivars revealed five candidate genes that may be involved in key steps of linalool biosynthesis; especially the expressions of three TPS genes, PdTPS1, PdTPS2, and PdTPS4, were significantly positively correlated with linalool emissions across tree peony cultivars. Further biochemical evidence demonstrated that PdTPS1 and PdTPS4 were the pivotal genes determining the species-specific and cultivar-specific emission of linalool. This study revealed a new insight into floral scent divergence in tree peony and would greatly facilitate our understanding of the phylogeny and evolution of Paeonia.
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Affiliation(s)
| | | | - Miao Sun
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
| | - Mengwen Lv
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
| | - Yong Yang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- China National Botanical Garden, Beijing 100093, China
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Insights into the Cytochrome P450 Monooxygenase Superfamily in Osmanthus fragrans and the Role of OfCYP142 in Linalool Synthesis. Int J Mol Sci 2022; 23:ijms232012150. [PMID: 36293004 PMCID: PMC9602793 DOI: 10.3390/ijms232012150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/04/2022] [Accepted: 10/10/2022] [Indexed: 11/16/2022] Open
Abstract
Osmanthus fragrans flowers have long been used as raw materials in food, tea, beverage, and perfume industries due to their attractive and strong fragrance. The P450 superfamily proteins have been reported to widely participate in the synthesis of plant floral volatile organic compounds (VOCs). To investigate the potential functions of P450 superfamily proteins in the fragrance synthesis of O. fragrans, we investigated the P450 superfamily genome wide. A total of 276 P450 genes were identified belonging to 40 families. The RNA-seq data suggested that many OfCYP genes were preferentially expressed in the flower or other organs, and some were also induced by multiple abiotic stresses. The expression patterns of seven flower-preferentially expressed OfCYPs during the five different flower aroma content stages were further explored using quantitative real-time PCR, showing that the CYP94C subfamily member OfCYP142 had the highest positive correlation with linalool synthesis gene OfTPS2. The transient expression of OfCYP142 in O. fragrans petals suggested that OfCYP142 can increase the content of linalool, an important VOC of the O. fragrans floral aroma, and a similar result was also obtained in flowers of OfCYP142 transgenic tobacco. Combined with RNA-seq data of the transiently transformed O. fragrans petals, we found that the biosynthesis pathway of secondary metabolites was significantly enriched, and many 2-C-methyl-D-erythritol 4-phosphate (MEP) pathway genes were also upregulated. This evidence indicated that the OfCYP proteins may play critical roles in the flower development and abiotic response of O. fragrans, and that OfCYP142 can participate in linalool synthesis. This study provides valuable information about the functions of P450 genes and a valuable guide for studying further functions of OfCYPs in promoting fragrance biosynthesis of ornamental plants.
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Liu S, Shan B, Zhou X, Gao W, Liu Y, Zhu B, Sun L. Transcriptome and Metabolomics Integrated Analysis Reveals Terpene Synthesis Genes Controlling Linalool Synthesis in Grape Berries. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:9084-9094. [PMID: 35820041 DOI: 10.1021/acs.jafc.2c00368] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this study, four hybrids from the cross between "Italia" and "Tamina" grapes were chosen to investigate their distinct monoterpenoids patterns and candidate genes involved. Monoterpenoid profiles and transcriptome data were generated at four berry developmental stages. Trans-rose oxide, cis-rose oxide, citronellol, neral, nerol, nerol oxide, geraniol, geranial, geranic acid, and cis-isogeraniol were the dominant compounds in R250 hybrid, while linalool, hotrienol, linalool oxide pyranoside, and cis-furan linalool oxide were the main compounds in R77 hybrid. Six TPS-g subfamily genes were found related with the contents of linalool and its related monoterpenoids by weighted gene coexpression network analysis (WGCNA) and phylogenetic analysis. Among them, TPS59 was cloned and functionally verified by transient overexpression in the leaves of Vitis quinquangularis. Meanwhile, NAC (newGene_195), C2C2-GATA (VIT_15s0021g02510), and bHLH (VIT_14s0128g00110) were selected as candidate transcription factors (TFs) that could regulate the expression of the six TPS-b genes. These data enhanced our understanding on the regulation of monoterpenoid biosynthesis in grapes.
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Affiliation(s)
- Songyu Liu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, No. 35 Tsinghua East Road, Beijing 100083, China
- Beijing Key Laboratory of Forestry Food Processing and Safety, Department of Food Science and Engineering, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
- Institute of Forestry and Pomology, Beijing Academy of Agricultural and Forestry Sciences, Rui-Wang-Fen, Minzhuang Road, Beijing 100093, China
| | - Bingqi Shan
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, No. 35 Tsinghua East Road, Beijing 100083, China
- Beijing Key Laboratory of Forestry Food Processing and Safety, Department of Food Science and Engineering, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
- Institute of Forestry and Pomology, Beijing Academy of Agricultural and Forestry Sciences, Rui-Wang-Fen, Minzhuang Road, Beijing 100093, China
| | - Xiaomiao Zhou
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, No. 35 Tsinghua East Road, Beijing 100083, China
- Beijing Key Laboratory of Forestry Food Processing and Safety, Department of Food Science and Engineering, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
- Institute of Forestry and Pomology, Beijing Academy of Agricultural and Forestry Sciences, Rui-Wang-Fen, Minzhuang Road, Beijing 100093, China
| | - Wenping Gao
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, No. 35 Tsinghua East Road, Beijing 100083, China
- Beijing Key Laboratory of Forestry Food Processing and Safety, Department of Food Science and Engineering, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
| | - Yaran Liu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, No. 35 Tsinghua East Road, Beijing 100083, China
- Beijing Key Laboratory of Forestry Food Processing and Safety, Department of Food Science and Engineering, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
| | - Baoqing Zhu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, No. 35 Tsinghua East Road, Beijing 100083, China
- Beijing Key Laboratory of Forestry Food Processing and Safety, Department of Food Science and Engineering, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
| | - Lei Sun
- Institute of Forestry and Pomology, Beijing Academy of Agricultural and Forestry Sciences, Rui-Wang-Fen, Minzhuang Road, Beijing 100093, China
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12
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Yu J, Tu X, Huang AC. Functions and biosynthesis of plant signaling metabolites mediating plant-microbe interactions. Nat Prod Rep 2022; 39:1393-1422. [PMID: 35766105 DOI: 10.1039/d2np00010e] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Covering: 2015-2022Plants and microbes have coevolved since their appearance, and their interactions, to some extent, define plant health. A reasonable fraction of small molecules plants produced are involved in mediating plant-microbe interactions, yet their functions and biosynthesis remain fragmented. The identification of these compounds and their biosynthetic genes will open up avenues for plant fitness improvement by manipulating metabolite-mediated plant-microbe interactions. Herein, we integrate the current knowledge on their chemical structures, bioactivities, and biosynthesis with the view of providing a high-level overview on their biosynthetic origins and evolutionary trajectory, and pinpointing the yet unknown and key enzymatic steps in diverse biosynthetic pathways. We further discuss the theoretical basis and prospects for directing plant signaling metabolite biosynthesis for microbe-aided plant health improvement in the future.
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Affiliation(s)
- Jingwei Yu
- Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, SUSTech-PKU Institute of Plant and Food Science, Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.
| | - Xingzhao Tu
- Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, SUSTech-PKU Institute of Plant and Food Science, Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.
| | - Ancheng C Huang
- Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, SUSTech-PKU Institute of Plant and Food Science, Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.
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13
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Xiao Y, Tan H, Huang H, Yu J, Zeng L, Liao Y, Wu P, Yang Z. Light synergistically promotes the tea green leafhopper infestation-induced accumulation of linalool oxides and their glucosides in tea (Camellia sinensis). Food Chem 2022; 394:133460. [PMID: 35716497 DOI: 10.1016/j.foodchem.2022.133460] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 06/07/2022] [Accepted: 06/09/2022] [Indexed: 11/16/2022]
Abstract
Linalool, which is one of the most representative aroma substances in tea, is transformed into other aroma-related compounds, including linalool 3,6-oxides and linalool 3,7-oxides. The objective of this study was to elucidate the linalool oxide synthesis pathway and its response to stress in tea. By feeding experiment, chemical synthesis, and compound analysis, it was found that linalool can be transformed to linalool oxides via 6,7-epoxylinalool. The conversion rate from 6,7-epoxylinalool to linalool oxides was relatively high under acidic conditions. Four linalool oxide glucosides obtained from tea were structurally characterized. Additionally, tea green leafhopper infestation was observed to activate the whole metabolic flow from linalool into linalool oxides and their glucosides (p < 0.01). Moreover, light treatments further increased the accumulation of linalool oxides and their glucosides (p < 0.05). These results will be useful for elucidating the mechanism mediating linalool oxides content changes in response to stress in tea.
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Affiliation(s)
- Yangyang Xiao
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Haibo Tan
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China
| | - Haitao Huang
- Hangzhou Academy of Agricultural Sciences, No. 261 Zhusi Road, Xihu District, Hangzhou 310024, China
| | - Jizhong Yu
- Hangzhou Academy of Agricultural Sciences, No. 261 Zhusi Road, Xihu District, Hangzhou 310024, China
| | - Lanting Zeng
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China
| | - Yinyin Liao
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China
| | - Ping Wu
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China
| | - Ziyin Yang
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China; Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China.
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14
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Linalool Activates Oxidative and Calcium Burst and CAM3-ACA8 Participates in Calcium Recovery in Arabidopsis Leaves. Int J Mol Sci 2022; 23:ijms23105357. [PMID: 35628166 PMCID: PMC9142083 DOI: 10.3390/ijms23105357] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/06/2022] [Accepted: 05/09/2022] [Indexed: 12/04/2022] Open
Abstract
Plants produce linalool to respond to biotic stress, but the linalool-induced early signal remains unclear. In wild-type Arabidopsis, plant resistance to diamondback moth (Plutella xylostella) increased more strongly in a linalool-treated group than in an untreated control group. H2O2 and Ca2+, two important early signals that participated in biotic stress, burst after being treated with linalool in Arabidopsis mesophyll cells. Linalool treatment increased H2O2 and intracellular calcium concentrations in mesophyll cells, observed using a confocal microscope with laser scanning, and H2O2 signaling functions upstream of Ca2+ signaling by using inhibitors and mutants. Ca2+ efflux was detected using non-invasive micro-test technology (NMT), and Ca2+ efflux was also inhibited by NADPH oxidase inhibitor DPI (diphenyleneiodonium chloride) and in cells of the NADPH oxidase mutant rbohd. To restore intracellular calcium levels, Ca2+-ATPase was activated, and calmodulin 3 (CAM3) participated in Ca2+-ATPase activation. This result is consistent with the interaction between CAM7 and Ca2+-ATPase isoform 8 (ACA8). In addition, a yeast two-hybrid assay, firefly luciferase complementation imaging assay, and an in vitro pulldown assay showed that CAM3 interacts with the N-terminus of ACA8, and qRT-PCR showed that some JA-related genes and defense genes expressions were enhanced when treated with linalool in Arabidopsis leaves. This study reveals that linalool enhances H2O2 and intracellular calcium concentrations in Arabidopsis mesophyll cells; CAM3-ACA8 reduces intracellular calcium concentrations, allowing cells to resume their resting state. Additionally, JA-related genes and defense genes' expression may enhance plants' defense when treated with linalool.
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15
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Yan X, Ding W, Wu X, Wang L, Yang X, Yue Y. Insights Into the MYB-Related Transcription Factors Involved in Regulating Floral Aroma Synthesis in Sweet Osmanthus. FRONTIERS IN PLANT SCIENCE 2022; 13:765213. [PMID: 35356120 PMCID: PMC8959829 DOI: 10.3389/fpls.2022.765213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 01/03/2022] [Indexed: 06/14/2023]
Abstract
As an important member of the MYB transcription factor (TF) family, the MYB-related TFs play multiple roles in regulating the synthesis of secondary metabolites and developmental processes, as well as in response to numerous biotic and abiotic stressors in plants. However, little is known regarding their roles in regulating the formation of floral volatile organic compounds (VOCs). In this study, we conducted a genome-wide analysis of MYB-related proteins in sweet osmanthus; 212 OfMYB-related TFs were divided into three distinct subgroups based on the phylogenetic analysis. Additionally, we found that the expansion of the OfMYB-related genes occurred primarily through segmental duplication events, and purifying selection occurred in all duplicated gene pairs. RNA-seq data revealed that the OfMYB-related genes were widely expressed in different organs of sweet osmanthus, and some showed flower organ/development stage-preferential expression patterns. Here, three OfMYB-related genes (OfMYB1R70/114/201), which were expressed nuclearly in floral organs, were found to be significantly involved in regulating the synthesis of floral VOCs. Only, OfMYB1R201 had transcriptional activity, thus implying that this gene participates in regulating the expression of VOC synthesis related genes. Remarkably, the transient expression results suggested that OfMYB1R70, OfMYB1R114, and OfMYB1R201 are involved in the regulation of VOC synthesis; OfMYB1R114 and OfMYB1R70 are involved in accelerating β-ionone formation. In contrast, OfMYB1R201 decreases the synthesis of β-ionone. Our results deepen our knowledge of the functions of MYB-related TFs and provide critical candidate genes for the floral aroma breeding of sweet osmanthus in the future.
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Affiliation(s)
- Xin Yan
- Key Laboratory of Landscape Architecture, Nanjing Forestry University, Nanjing, China
- Co-innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Wenjie Ding
- Key Laboratory of Landscape Architecture, Nanjing Forestry University, Nanjing, China
- Co-innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Xiuyi Wu
- Key Laboratory of Landscape Architecture, Nanjing Forestry University, Nanjing, China
- Co-innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Lianggui Wang
- Key Laboratory of Landscape Architecture, Nanjing Forestry University, Nanjing, China
- Co-innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Xiulian Yang
- Key Laboratory of Landscape Architecture, Nanjing Forestry University, Nanjing, China
- Co-innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Yuanzheng Yue
- Key Laboratory of Landscape Architecture, Nanjing Forestry University, Nanjing, China
- Co-innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
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16
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Bechen LL, Johnson MG, Broadhead GT, Levin RA, Overson RP, Jogesh T, Fant JB, Raguso RA, Skogen KA, Wickett NJ. Differential gene expression associated with a floral scent polymorphism in the evening primrose Oenothera harringtonii (Onagraceae). BMC Genomics 2022; 23:124. [PMID: 35151274 PMCID: PMC8840323 DOI: 10.1186/s12864-022-08370-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 12/30/2021] [Indexed: 12/13/2022] Open
Abstract
Background Plant volatiles play an important role in both plant-pollinator and plant-herbivore interactions. Intraspecific polymorphisms in volatile production are ubiquitous, but studies that explore underlying differential gene expression are rare. Oenothera harringtonii populations are polymorphic in floral emission of the monoterpene (R)-(−)-linalool; some plants emit (R)-(−)-linalool (linalool+ plants) while others do not (linalool- plants). However, the genes associated with differential production of this floral volatile in Oenothera are unknown. We used RNA-Seq to broadly characterize differential gene expression involved in (R)-(−)-linalool biosynthesis. To identify genes that may be associated with the polymorphism for this trait, we used RNA-Seq to compare gene expression in six different Oenothera harringtonii tissues from each of three linalool+ and linalool- plants. Results Three clusters of differentially expressed genes were enriched for terpene synthase activity: two were characterized by tissue-specific upregulation and one by upregulation only in plants with flowers that produce (R)-(−)-linalool. A molecular phylogeny of all terpene synthases identified two putative (R)-(−)-linalool synthase transcripts in Oenothera harringtonii, a single allele of which is found exclusively in linalool+ plants. Conclusions By using a naturally occurring polymorphism and comparing different tissues, we were able to identify candidate genes putatively involved in the biosynthesis of (R)-(−)-linalool. Expression of these genes in linalool- plants, while low, suggests a regulatory polymorphism, rather than a population-specific loss-of-function allele. Additional terpene biosynthesis-related genes that are up-regulated in plants that emit (R)-(−)-linalool may be associated with herbivore defense, suggesting a potential economy of scale between plant reproduction and defense. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-022-08370-6.
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17
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Huff RM, Pitts RJ. Functional conservation of Anopheline linalool receptors through 100 million years of evolution. Chem Senses 2022; 47:bjac032. [PMID: 36458901 PMCID: PMC9717389 DOI: 10.1093/chemse/bjac032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Insects rely on olfactory receptors to detect and respond to diverse environmental chemical cues. Detection of semiochemicals by these receptors modulates insect behavior and has a direct impact on species fitness. Volatile organic compounds (VOCs) are released by animals and plants and can provide contextual cues that a blood meal host or nectar source is present. One such VOC is linalool, an enantiomeric monoterpene, that is emitted from plants and bacteria species. This compound exists in nature as one of two possible stereoisomers, (R)-(-)-linalool or (S)-(+)-linalool. In this study, we use a heterologous expression system to demonstrate differential responsiveness of a pair of Anopheline odorant receptors (Ors) to enantiomers of linalool. The mosquitoes Anopheles gambiae and Anopheles stephensi encode single copies of Or29 and Or53, which are expressed in the labella of An. gambiae. (S)-(+)-linalool activates Or29 orthologs with a higher potency than (R)-(-)-linalool, while the converse is observed for Or53 orthologs. The conservation of these receptors across a broad range of Anopheline species suggests they may function in the discrimination of linalool stereoisomers, thereby influencing the chemical ecology of mosquitoes. One potential application of this knowledge would be in the design of novel attractants or repellents to be used in integrated pest management practices.
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Affiliation(s)
- Robert M Huff
- Department of Biology, Baylor University, Waco, TX 76706, USA
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18
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He J, Verstappen F, Jiao A, Dicke M, Bouwmeester HJ, Kappers IF. Terpene synthases in cucumber (Cucumis sativus) and their contribution to herbivore-induced volatile terpenoid emission. THE NEW PHYTOLOGIST 2022; 233:862-877. [PMID: 34668204 PMCID: PMC9299122 DOI: 10.1111/nph.17814] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 10/12/2021] [Indexed: 05/10/2023]
Abstract
Terpenoids play important roles in flavour, pollinator attraction and defence of plants. In cucumber (Cucumis sativus) they are important components of the herbivore-induced plant volatile blend that attracts natural enemies of herbivores. We annotated the cucumber TERPENE SYNTHASE gene (CsTPS) family and characterized their involvement in the response towards herbivores with different feeding guilds using a combined molecular and biochemical approach. Transcripts of multiple CsTPS genes were upregulated in leaves upon herbivory and the products generated by the expressed proteins match the terpenoids recorded in the volatile blend released by herbivore-damaged leaves. Spatial and temporal analysis of the promoter activity of CsTPS genes showed that cell content-feeding spider mites (Tetranychus urticae) and thrips (Frankliniella occidentalis) induced promoter activity of CsTPS9 and CsTPS19 within hours after initiation of infestation, while phloem-feeding aphids (Myzus persicae) induced CsTPS2 promoter activity. Our findings offer detailed insights into the involvement of the TPS gene family in the dynamics and fine-tuning of the emission of herbivore-induced plant volatiles in cucumber, and open a new avenue to understand molecular mechanisms that affect plant-herbivore interactions.
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Affiliation(s)
- Jun He
- Laboratory of Plant PhysiologyPlant Sciences GroupWageningen University & Research6700AAWageningenthe Netherlands
- Citrus Research InstituteSouthwest University400712ChongqingChina
| | - Francel Verstappen
- Laboratory of Plant PhysiologyPlant Sciences GroupWageningen University & Research6700AAWageningenthe Netherlands
| | - Ao Jiao
- Laboratory of Plant PhysiologyPlant Sciences GroupWageningen University & Research6700AAWageningenthe Netherlands
| | - Marcel Dicke
- Laboratory of EntomologyPlant Sciences GroupWageningen University & Research6700AAWageningenthe Netherlands
| | - Harro J. Bouwmeester
- Laboratory of Plant PhysiologyPlant Sciences GroupWageningen University & Research6700AAWageningenthe Netherlands
- Plant Hormone Biology GroupSwammerdam Institute for Life SciencesUniversity of Amsterdam1000BEAmsterdamthe Netherlands
| | - Iris F. Kappers
- Laboratory of Plant PhysiologyPlant Sciences GroupWageningen University & Research6700AAWageningenthe Netherlands
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19
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Wei C, Liu H, Cao X, Zhang M, Li X, Chen K, Zhang B. Synthesis of flavour-related linalool is regulated by PpbHLH1 and associated with changes in DNA methylation during peach fruit ripening. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:2082-2096. [PMID: 34036730 PMCID: PMC8486240 DOI: 10.1111/pbi.13638] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 05/02/2021] [Accepted: 05/13/2021] [Indexed: 05/08/2023]
Abstract
Linalool is one of the common flavour-related volatiles across the plant kingdom and plays an essential role in determining consumer liking of plant foods. Although great process has been made in identifying terpene synthase (TPS) genes associated with linalool synthesis, much less is known about regulation of this pathway. We initiated study by identifying PpTPS3 encoding protein catalysing enantiomer (S)-(+)-linalool synthesis, which is a major linalool component (˜70%) observed in ripe peach fruit. Overexpression of PpTPS3 led to linalool accumulation, while virus-induced gene silencing of PpTPS3 led to a 66.5% reduction in linalool content in peach fruit. We next identified transcription factor (TF) PpbHLH1 directly binds to E-box (CACATG) in the PpTPS3 promoter and activates its expression based on yeast one-hybrid assay and EMSA analysis. Significantly positive correlation was also observed between PpbHLH1 expression and linalool production across peach cultivars. Peach fruit accumulated more linalool after overexpressing PpbHLH1 in peach fruit and reduced approximately 54.4% linalool production after silencing this TF. DNA methylation analysis showed increased PpTPS3 expression was associated with decreased 5 mC level in its promoter during peach fruit ripening, but no reverse pattern was observed for PpbHLH1. Arabidopsis and tomato fruits transgenic for peach PpbHLH1 synthesize and accumulate higher levels of linalool compared with wild-type controls. Taken together, these results would greatly facilitate efforts to enhance linalool production and thus improve flavour of fruits.
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Affiliation(s)
- Chunyan Wei
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
| | - Hongru Liu
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
- Research Center for Agricultural Products Preservation and ProcessingShanghai Academy of Agricultural SciencesShanghaiChina
| | - Xiangmei Cao
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
| | - Minglei Zhang
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
| | - Xian Li
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
| | - Kunsong Chen
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
| | - Bo Zhang
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
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20
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Li R, Li Z, Leng P, Hu Z, Wu J, Dou D. Transcriptome sequencing reveals terpene biosynthesis pathway genes accounting for volatile terpene of tree peony. PLANTA 2021; 254:67. [PMID: 34495419 DOI: 10.1007/s00425-021-03715-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 08/29/2021] [Indexed: 06/13/2023]
Abstract
Transcriptomic and volatile component analyses showed that high expression levels of genes from the terpenoid backbone biosynthesis pathway and the monoterpene metabolic pathway can strengthen the floral fragrance of tree peony. Floral fragrance is a crucial ornamental trait whose improvement is one of the primary objectives of tree peony breeding. So far, exploration of the floral fragrance of tree peony has focused on the identification of its volatile components, but the molecular mechanisms responsible for their formation remain unclear. Here, we identified 128 volatile components from the petals of tree peony and found that they consisted primarily of terpenes, alcohols, and esters. Based on the distribution pattern of these major fragrance components, 24 tree peony cultivars were classified into 4 types: grassy scent (ocimene), woody scent (longifolene), lily of the valley scent (linalool), and fruity scent (2-ethyl hexanol). We used RNA-seq to explore the mechanistic basis of terpenoid metabolism in tree peony petals with various scents. The expression levels of AACT, HMGR, PMK, DXS, DXR, HDS, HDR, and GGPS, which encode key enzymes of terpenoid backbone biosynthesis, were upregulated in 'Huangguan' (strong fragrance) compared to 'Fengdan' (faint fragrance). Moreover, the transcript abundance of LIS and MYS, two monoterpene synthase genes, was also enhanced in petals of 'Huangguan' compared to those of 'Fengdan'. Together, these results demonstrate that differences in the expression of genes from the monoterpene synthesis and terpenoid backbone pathways are associated with differences in the fragrance of tree peony. This research provides crucial genetic resources for fragrance improvement and also lays a foundation for further clarification of the mechanisms that underlie tree peony fragrance.
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Affiliation(s)
- Rongchen Li
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, 102206, China
- College of Landscape Architecture, Beijing University of Agriculture, Beijing, 102206, China
| | - Ziyao Li
- College of Landscape Architecture, Beijing University of Agriculture, Beijing, 102206, China
| | - Pingsheng Leng
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, 102206, China
- College of Landscape Architecture, Beijing University of Agriculture, Beijing, 102206, China
| | - Zenghui Hu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, 102206, China
- College of Landscape Architecture, Beijing University of Agriculture, Beijing, 102206, China
- Beijing Laboratory of Urban and Rural Ecological Environment, Beijing, 102206, China
| | - Jing Wu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, 102206, China.
- College of Landscape Architecture, Beijing University of Agriculture, Beijing, 102206, China.
- Beijing Laboratory of Urban and Rural Ecological Environment, Beijing, 102206, China.
| | - Dequan Dou
- College of Landscape Architecture, Beijing University of Agriculture, Beijing, 102206, China.
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21
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Hansen CC, Nelson DR, Møller BL, Werck-Reichhart D. Plant cytochrome P450 plasticity and evolution. MOLECULAR PLANT 2021; 14:1244-1265. [PMID: 34216829 DOI: 10.1016/j.molp.2021.06.028] [Citation(s) in RCA: 107] [Impact Index Per Article: 35.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/28/2021] [Accepted: 06/30/2021] [Indexed: 05/27/2023]
Abstract
The superfamily of cytochrome P450 (CYP) enzymes plays key roles in plant evolution and metabolic diversification. This review provides a status on the CYP landscape within green algae and land plants. The 11 conserved CYP clans known from vascular plants are all present in green algae and several green algae-specific clans are recognized. Clan 71, 72, and 85 remain the largest CYP clans and include many taxa-specific CYP (sub)families reflecting emergence of linage-specific pathways. Molecular features and dynamics of CYP plasticity and evolution are discussed and exemplified by selected biosynthetic pathways. High substrate promiscuity is commonly observed for CYPs from large families, favoring retention of gene duplicates and neofunctionalization, thus seeding acquisition of new functions. Elucidation of biosynthetic pathways producing metabolites with sporadic distribution across plant phylogeny reveals multiple examples of convergent evolution where CYPs have been independently recruited from the same or different CYP families, to adapt to similar environmental challenges or ecological niches. Sometimes only a single or a few mutations are required for functional interconversion. A compilation of functionally characterized plant CYPs is provided online through the Plant P450 Database (erda.dk/public/vgrid/PlantP450/).
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Affiliation(s)
- Cecilie Cetti Hansen
- Plant Biochemistry Laboratory, Department of Plant and Environmental Science, University of Copenhagen, Copenhagen, Denmark; VILLUM Research Center for Plant Plasticity, University of Copenhagen, Copenhagen, Denmark.
| | - David R Nelson
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Birger Lindberg Møller
- Plant Biochemistry Laboratory, Department of Plant and Environmental Science, University of Copenhagen, Copenhagen, Denmark; VILLUM Research Center for Plant Plasticity, University of Copenhagen, Copenhagen, Denmark
| | - Daniele Werck-Reichhart
- Institute of Plant Molecular Biology, Centre National de la Recherche Scientifique (CNRS), University of Strasbourg, Strasbourg, France.
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22
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He J, Halitschke R, Baldwin IT, Schuman MC. Natural variation in linalool metabolites: One genetic locus, many functions? JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2021; 63:1416-1421. [PMID: 33930259 DOI: 10.1111/jipb.13104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 04/27/2021] [Indexed: 06/12/2023]
Abstract
The ubiquitous volatile linalool is metabolized in plants to nonvolatile derivatives. We studied Nicotiana attenuata plants which naturally vary in (S)-(+)-linalool contents, and lines engineered to produce either (R)-(-)- or (S)-(+)-linalool. Only (S)-(+)-linalool production was associated with slower growth of a generalist herbivore, and a large fraction was present as nonvolatile derivatives. We found that variation in volatile linalool and its nonvolatile glycosides mapped to the same genetic locus which harbored the biosynthetic gene, NaLIS, but that free linalool varied more in environmental responses. This study reveals how (S)-(+)-linalool and conjugates differ in their regulation and possible functions in resistance.
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Affiliation(s)
- Jun He
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena, 07745, Germany
| | - Rayko Halitschke
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena, 07745, Germany
| | - Ian T Baldwin
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena, 07745, Germany
| | - Meredith C Schuman
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena, 07745, Germany
- Departments of Geography and Chemistry, University of Zürich, Zürich, 8057, Switzerland
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Abdollahi F, Alebrahim MT, Ngov C, Lallemand E, Zheng Y, Villette C, Zumsteg J, André F, Navrot N, Werck-Reichhart D, Miesch L. Innate promiscuity of the CYP706 family of P450 enzymes provides a suitable context for the evolution of dinitroaniline resistance in weed. THE NEW PHYTOLOGIST 2021; 229:3253-3268. [PMID: 33253456 DOI: 10.1111/nph.17126] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 11/24/2020] [Indexed: 05/24/2023]
Abstract
Increased metabolism is one of the main causes for evolution of herbicide resistance in weeds, a major challenge for sustainable food production. The molecular drivers of this evolution are poorly understood. We tested here the hypothesis that a suitable context for the emergence of herbicide resistance could be provided by plant enzymes with high innate promiscuity with regard to their natural substrates. A selection of yeast-expressed plant cytochrome P450 enzymes with well documented narrow to broad promiscuity when metabolizing natural substrates was tested for herbicide metabolism competence. The positive candidate was assayed for capacity to confer herbicide tolerance in Arabidopsis thaliana. Our data demonstrate that Arabidopsis thaliana CYP706A3, with the most promiscuous activity on monoterpenes and sesquiterpenes for flower defence, can also oxidize plant microtubule assembly inhibitors, dinitroanilines. Ectopic overexpression of CYP706A3 confers dinitroaniline resistance. We show, in addition, that the capacity to metabolize dinitroanilines is shared by other members of the CYP706 family from plants as diverse as eucalyptus and cedar. Supported by three-dimensional (3D) modelling of CYP706A3, the properties of enzyme active site and substrate access channel are discussed together with the shared physicochemical properties of the natural and exogenous substrates to explain herbicide metabolism.
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Affiliation(s)
- Fatemeh Abdollahi
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg, Strasbourg, 67084, France
- Department of Agronomy and Plant Breeding, Faculty of Agricultural Sciences & Natural Resources, University of Mohaghegh Ardabili, Ardabil, 56199-11367, Iran
- Equipe de Synthèse Organique et Phytochimie, Institut de Chimie, CNRS, Université de Strasbourg, Strasbourg, 67081, France
| | - Mohammad Taghi Alebrahim
- Department of Agronomy and Plant Breeding, Faculty of Agricultural Sciences & Natural Resources, University of Mohaghegh Ardabili, Ardabil, 56199-11367, Iran
| | - Chheng Ngov
- Equipe de Synthèse Organique et Phytochimie, Institut de Chimie, CNRS, Université de Strasbourg, Strasbourg, 67081, France
| | - Etienne Lallemand
- Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique (CEA), CNRS, Université Paris-Saclay, Gif-sur-Yvette, 91198, France
| | - Yongxiang Zheng
- Equipe de Synthèse Organique et Phytochimie, Institut de Chimie, CNRS, Université de Strasbourg, Strasbourg, 67081, France
| | - Claire Villette
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg, Strasbourg, 67084, France
| | - Julie Zumsteg
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg, Strasbourg, 67084, France
| | - François André
- Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique (CEA), CNRS, Université Paris-Saclay, Gif-sur-Yvette, 91198, France
| | - Nicolas Navrot
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg, Strasbourg, 67084, France
| | - Danièle Werck-Reichhart
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg, Strasbourg, 67084, France
| | - Laurence Miesch
- Equipe de Synthèse Organique et Phytochimie, Institut de Chimie, CNRS, Université de Strasbourg, Strasbourg, 67081, France
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Huang JQ, Li DM, Tian X, Lin JL, Yang L, Xu JJ, Fang X. Side Products of Recombinant Amorpha-4,11-diene Synthase and Their Effect on Microbial Artemisinin Production. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:2168-2178. [PMID: 33566615 DOI: 10.1021/acs.jafc.0c07462] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Amorpha-4,11-diene synthase (ADS) is the first committed enzyme in the biosynthesis of artemisinin. Artemisinin production by biobased fermentation is considered a reliable alternative pathway. Heterologously expressed ADS has been established to generate several minor products, including structural analogues of amorpha-4,11-diene, but their fate in fermentation is still unknown. Here, using chiral analysis, we found that ADS produces one of the analogues, amorpha-4-en-11-ol, as a pair of epimers. Labeling experiments revealed that ADS mutants yielded amorphene-type sesquiterpenes, indicating the co-occurrence of initial 1,6 and 1,10 cyclization of farnesyl diphosphate in a single enzyme. Interestingly, the immediate downstream oxidase CYP71AV1 had very low affinity to the side products of the recombinant ADS, including amorpha-4-en-7-ol, which is structurally similar to amorpha-4,11-diene. Our data uncover the complex catalytic mechanism of recombinant ADS and reveal a potential negative effect of the side products of recombinant ADS on the production of the artemisinin precursor in microbes.
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Affiliation(s)
- Jin-Quan Huang
- , Yunnan University, Kunming 650091, P. R. China
- , National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology/CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Dong-Mei Li
- , Yunnan University, Kunming 650091, P. R. China
- , State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, P. R. China
| | - Xiu Tian
- , National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology/CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Jia-Ling Lin
- , National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology/CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, P. R. China
- , School of Life Science and Technology, ShanghaiTech Universit, Shanghai 200031, P. R. China
| | - Lei Yang
- , Shanghai Key Laboratory of Plant Functional Genomics and Resources, Plant Science Research Center, Shanghai Chenshan Botanical Garden, Shanghai 201602, P. R. China
| | - Jing-Jing Xu
- , Shanghai Key Laboratory of Plant Functional Genomics and Resources, Plant Science Research Center, Shanghai Chenshan Botanical Garden, Shanghai 201602, P. R. China
| | - Xin Fang
- , State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, P. R. China
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25
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Wang W, Feng J, Wei L, Khalil-Ur-Rehman M, Nieuwenhuizen NJ, Yang L, Zheng H, Tao J. Transcriptomics Integrated with Free and Bound Terpenoid Aroma Profiling during "Shine Muscat" ( Vitis labrusca × V. vinifera) Grape Berry Development Reveals Coordinate Regulation of MEP Pathway and Terpene Synthase Gene Expression. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:1413-1429. [PMID: 33481572 DOI: 10.1021/acs.jafc.0c06591] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Terpenes and their derivatives are important biomarkers of grape quality as they contribute to the flavor and aroma of grapes. However, the molecular basis of terpene biosynthesis throughout the grapevine phenological developmental cycle remains elusive. Our current study investigates the free and bound terpene biosynthesis of berries at different phenological stages from preveraison to harvest. Detailed gene expression (transcriptomics) analysis, terpenoid volatile production by gas chromatography-mass spectrometry (GC-MS), and in planta transient expression were employed. Our results show that concentrations of most individual terpenes at different stages are distinctive and increase from preveraison to the veraison stage followed by a decrease from veraison to maturity. The combined transcriptomic analysis and terpene profiling revealed that 22 genes belonging to the MEP pathway and multiple classes of transcription factor family members including bHLH and several hormone biosynthesis- or signaling-related genes likely participate in the regulation of terpenoid biosynthesis according to their specific expression patterns in berries. Quantitative real-time polymerase chain expression analysis of 8 key differentially expressed genes in MEP pathways and further 12 randomly selected genes was performed during 8 sampling stages and validated the RNA-seq-derived expression profiles. To further confirm the function of a subset of the differentially expressed genes, we investigated the effects of combined overexpression of 1-deoxy-d-xylulose-5-phosphate synthase (VvDXS1-LOC100249323), 1-deoxy-d-xylulose-5-phosphate reductoisomerase (VvDXR-LOC100248516), and terpene synthase (VvTPS56-LOC100266449) on the production of terpenes by transient overexpression in Nicotiana benthamiana leaves. The overall developmental patterns of total terpenes and gene expression profiles will help guide the functional analyses of further candidate genes important for terpene biosynthesis of grape as well as identifying the master transcriptional and hormonal regulators of this pathway in the future.
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Affiliation(s)
- Wu Wang
- College of Horticulture, Nanjing Agricultural University, 210095 Nanjing, China
| | - Jiao Feng
- College of Horticulture, Nanjing Agricultural University, 210095 Nanjing, China
| | - Lingling Wei
- College of Horticulture, Nanjing Agricultural University, 210095 Nanjing, China
| | | | - Niels J Nieuwenhuizen
- The New Zealand Institute for Plant and Food Research Ltd (PFR), Private Bag 92169 Auckland, New Zealand
| | - Lina Yang
- Division of Plant and Soil Sciences, West Virginia University, 3425 New Agricultural Sciences Building, 26506-6201 Morgantown, West Virginia, United States
| | - Huan Zheng
- College of Horticulture, Nanjing Agricultural University, 210095 Nanjing, China
| | - Jianmin Tao
- College of Horticulture, Nanjing Agricultural University, 210095 Nanjing, China
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Zeng L, Xiao Y, Zhou X, Yu J, Jian G, Li J, Chen J, Tang J, Yang Z. Uncovering reasons for differential accumulation of linalool in tea cultivars with different leaf area. Food Chem 2020; 345:128752. [PMID: 33302111 DOI: 10.1016/j.foodchem.2020.128752] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 11/26/2020] [Accepted: 11/26/2020] [Indexed: 11/29/2022]
Abstract
It is generally proposed that tea cultivars with larger leaves contain more linalool, an important tea aroma contributor, than ones with smaller leaves. The objective of this study was to confirm the trait and explore the involved reason. Investigation on ten tea cultivars with different leaf areas demonstrated a significant positive correlation between linalool content and leaf area (R2 = 0.739, p = 0.010). Analysis of metabolite and gene expression level showed that the transform ability of linalool into linalool oxides was the key factor. Feeding experiments that supplied tea leaves of different leaf areas with [2H3]linalool under different light conditions revealed that the larger tea leaves receive more light and are less capable of transformation of linalool to linalool oxides, thus leading to linalool accumulation. This information will advance understanding of the variation of linalool content in tea varieties and will provide assistance in breeding and screening of high-linalool tea cultivars.
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Affiliation(s)
- Lanting Zeng
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China; Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China
| | - Yangyang Xiao
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China; University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China
| | - Xiaochen Zhou
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China; University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China
| | - Jizhong Yu
- Hangzhou Academy of Agricultural Sciences, No. 261 Zhusi Road, Xihu District, Hangzhou 310024, China
| | - Guotai Jian
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China; University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China
| | - Jianlong Li
- Tea Research Institute, Guangdong Academy of Agricultural Sciences & Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation and Utilization, No. 6 Dafeng Road, Tianhe District, Guangzhou 510640, China
| | - Jiaming Chen
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China; University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China
| | - Jinchi Tang
- Tea Research Institute, Guangdong Academy of Agricultural Sciences & Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation and Utilization, No. 6 Dafeng Road, Tianhe District, Guangzhou 510640, China
| | - Ziyin Yang
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China; Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China; University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China.
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27
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Zhou Y, Deng R, Xu X, Yang Z. Enzyme Catalytic Efficiencies and Relative Gene Expression Levels of ( R)-Linalool Synthase and ( S)-Linalool Synthase Determine the Proportion of Linalool Enantiomers in Camellia sinensis var. sinensis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:10109-10117. [PMID: 32829629 DOI: 10.1021/acs.jafc.0c04381] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Linalool is abundant in tea leaves and contributes greatly to tea aroma. The two isomers of linalool, (R)-linalool and (S)-linalool, exist in tea leaves. Our study found that (R)-linalool was the minor isomer in nine of Camellia sinensis var. sinensis cultivars. The (R)-linalool synthase of tea plant CsRLIS was identified subsequently. It is a chloroplast-located protein and specifically catalyzes the formation of (R)-linalool in vitro and in vivo. CsRLIS was observed to be a stress-responsive gene and caused the accumulation of internal (R)-linalool during oolong tea manufacture, mechanical wounding, and insect attack. Further study demonstrated that the catalytic efficiency of CsRLIS was much lower than that of (S)-linalool synthase CsSLIS, which might explain the lower (R)-linalool proportion in C. sinensis var. sinensis cultivars. The relative expression levels of CsRLIS and CsSLIS may also affect the (R)-linalool proportions among C. sinensis var. sinensis cultivars. This information will help us understand differential distributions of chiral aroma compounds in tea.
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Affiliation(s)
- Ying Zhou
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China
| | - Rufang Deng
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China
| | - Xinlan Xu
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China
| | - Ziyin Yang
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China
- Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, No. 723 Xingke Road, Tianhe District, Guangzhou 510650, China
- University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China
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28
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Xiong R, Chen Z, Wang W, Jiang L, Xiang Y, Fan J. Combined transcriptome sequencing and prokaryotic expression to investigate the key enzyme in the 2-C-methylerythritol-4-phosphate pathway of Osmanthus fragrans. FUNCTIONAL PLANT BIOLOGY : FPB 2020; 47:945-958. [PMID: 32527366 DOI: 10.1071/fp19365] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 05/05/2020] [Indexed: 06/11/2023]
Abstract
Terpenoids are one of the main components of plant aromas. In the present study we investigated these compounds in Osmanthus fragrans Lour., which is a fragrant plant widely used for the production of essential oils. Quantitative real-time PCR (qRT-PCR) results of enzymes associated with the 2-C-methylerythritol-4-phosphate pathway confirmed that the TPS is a key enzyme for terpenoid synthesis in O. fragrans. In a series of experiments, we identified the TPS candidate genes in O. fragrans and revealed the underlying catalytic activity and subcellular localisation of the encoded proteins. Because there is no available O. fragrans reference genome, we sequenced and analysed its transcriptome and identified two putative TPS genes, OfTPS1 and OfTPS2. According to qRT-PCR analysis, both genes were most highly expressed at the full-bloom stage, suggesting that OfTPS1 and OfTPS2 contribute to O. fragrans terpenoid synthesis. To verify this hypothesis, we constructed prokaryotic expression vectors to obtain protein. In order to study the function of OfTPS1 and OfTPS2 in the synthesis of monoterpenes, the obtained proteins were reacted with geranyl pyrophosphate. As a result, two kinds of monoterpenes, (E)-β-ocimene and linalool, were detected from reaction products, respectively. In conclusion, OfTPS1 and OfTPS2 are both monoterpene synthases.
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Affiliation(s)
- Rui Xiong
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Zhu Chen
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Weiyu Wang
- Key Laboratory of Crop Biology of Anhui Province, School of Life Sciences, Anhui Agricultural University, Hefei, 230036, China
| | - Li Jiang
- Key Laboratory of Crop Biology of Anhui Province, School of Life Sciences, Anhui Agricultural University, Hefei, 230036, China
| | - Yan Xiang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China; and Corresponding authors. ; ;
| | - Jun Fan
- Key Laboratory of Crop Biology of Anhui Province, School of Life Sciences, Anhui Agricultural University, Hefei, 230036, China; and Corresponding authors. ; ;
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Ashaari NS, Ab. Rahim MH, Sabri S, Lai KS, Song AAL, Abdul Rahim R, Wan Abdullah WMAN, Ong Abdullah J. Functional characterization of a new terpene synthase from Plectranthus amboinicus. PLoS One 2020; 15:e0235416. [PMID: 32614884 PMCID: PMC7332032 DOI: 10.1371/journal.pone.0235416] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 06/15/2020] [Indexed: 12/21/2022] Open
Abstract
Plectranthus amboinicus (Lour.) Spreng is an aromatic medicinal herb known for its therapeutic and nutritional properties attributed by the presence of monoterpene and sesquiterpene compounds. Up until now, research on terpenoid biosynthesis has focused on a few mint species with economic importance such as thyme and oregano, yet the terpene synthases responsible for monoterpene production in P. amboinicus have not been described. Here we report the isolation, heterologous expression and functional characterization of a terpene synthase involved in P. amboinicus terpenoid biosynthesis. A putative monoterpene synthase gene (PamTps1) from P. amboinicus was isolated with an open reading frame of 1797 bp encoding a predicted protein of 598 amino acids with molecular weight of 69.6 kDa. PamTps1 shares 60–70% amino acid sequence similarity with other known terpene synthases of Lamiaceae. The in vitro enzymatic activity of PamTps1 demonstrated the conversion of geranyl pyrophosphate and farnesyl pyrophosphate exclusively into linalool and nerolidol, respectively, and thus PamTps1 was classified as a linalool/nerolidol synthase. In vivo activity of PamTps1 in a recombinant Escherichia coli strain revealed production of linalool and nerolidol which correlated with its in vitro activity. This outcome validated the multi-substrate usage of this enzyme in producing linalool and nerolidol both in in vivo and in vitro systems. The transcript level of PamTps1 was prominent in the leaf during daytime as compared to the stem. Gas chromatography-mass spectrometry (GC-MS) and quantitative real-time PCR analyses showed that maximal linalool level was released during the daytime and lower at night following a diurnal circadian pattern which correlated with the PamTps1 expression pattern. The PamTps1 cloned herein provides a molecular basis for the terpenoid biosynthesis in this local herb that could be exploited for valuable production using metabolic engineering in both microbial and plant systems.
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Affiliation(s)
- Nur Suhanawati Ashaari
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia
| | - Mohd Hairul Ab. Rahim
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia
| | - Suriana Sabri
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia
| | - Kok Song Lai
- Health Sciences Division, Abu Dhabi Women’s College, Higher Colleges of Technology, Abu Dhabi, United Arab of Emirates
| | - Adelene Ai-Lian Song
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia
| | - Raha Abdul Rahim
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia
| | | | - Janna Ong Abdullah
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia
- * E-mail:
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30
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Aslam MZ, Lin X, Li X, Yang N, Chen L. Molecular Cloning and Functional Characterization of CpMYC2 and CpBHLH13 Transcription Factors from Wintersweet ( Chimonanthus praecox L.). PLANTS 2020; 9:plants9060785. [PMID: 32585874 PMCID: PMC7356763 DOI: 10.3390/plants9060785] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 06/17/2020] [Accepted: 06/19/2020] [Indexed: 02/06/2023]
Abstract
Wintersweet (Chimonanthus praecox L.) is an ornamental and economically significant shrub known for its unique flowering characteristics, especially the emission of abundant floral volatile organic compounds. Thus, an understanding of the molecular mechanism of the production of these compounds is necessary to create new breeds with high volatile production. In this study, two bHLH transcription factors (CpMYC2 and CpbHLH13) of Wintersweet H29 were functionally characterized to illustrate their possible role in the production of volatile compounds. The qRT-PCR results showed that the expression of CpMYC2 and CpbHLH13 increased from the flower budding to full bloom stage, indicating that these two genes may play an essential role in blooming and aroma production in wintersweet. Gas chromatography-mass spectroscopy (GC-MS) analysis revealed that the overexpression of CpMYC2 in arabidopsis (Arabidopsis thaliana) AtMYC2-2 mutant (Salk_083483) and tobacco (Nicotiana tabaccum) genotype Petit Havana SR1 significantly increased floral volatile monoterpene, especially linalool, while the overexpression of CpbHLH13 in Arabidopsis thaliana ecotype Columbia-0 (Col-0) and tobacco genotype SR1 increased floral sesquiterpene β-caryophyllene production in both types of transgenic plants respectively. High expression of terpene synthase (TPS) genes in transgenic A. thaliana along with high expression of CpMYC2 and CpbHLH13 in transgenic plants was also observed. The application of a combination of methyl jasmonic acid (MeJA) and gibberellic acid (GA3) showed an increment in linalool production in CpMYC2-overexpressing arabidopsis plants, and the high transcript level of TPS genes also suggested the involvement of CpMYC2 in the jasmonic acid (JA) signaling pathway. These results indicate that both the CpMYC2 and CpbHLH13 transcription factors of wintersweet are possibly involved in the positive regulation and biosynthesis of monoterpene (linalool) and sesquiterpene (β-caryophyllene) in transgenic plants. This study also indicates the potential application of wintersweet as a valuable genomic material for the genetic modification of floral scent in other flowering plants that produce less volatile compounds.
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Affiliation(s)
- Muhammad Zeshan Aslam
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, China; (M.Z.A.); (X.L.); (X.L.)
| | - Xiang Lin
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, China; (M.Z.A.); (X.L.); (X.L.)
| | - Xiang Li
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, China; (M.Z.A.); (X.L.); (X.L.)
| | - Nan Yang
- Southwest Research Centre for Engineering Technology of Landscape Architecture (State Forestry and Grassland Administration), Southwest Forestry University, Kunming 650224, China;
| | - Longqing Chen
- Southwest Research Centre for Engineering Technology of Landscape Architecture (State Forestry and Grassland Administration), Southwest Forestry University, Kunming 650224, China;
- Correspondence:
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31
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Genomic evidence for convergent evolution of gene clusters for momilactone biosynthesis in land plants. Proc Natl Acad Sci U S A 2020; 117:12472-12480. [PMID: 32409606 DOI: 10.1073/pnas.1914373117] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Momilactones are bioactive diterpenoids that contribute to plant defense against pathogens and allelopathic interactions between plants. Both cultivated and wild grass species of Oryza and Echinochloa crus-galli (barnyard grass) produce momilactones using a biosynthetic gene cluster (BGC) in their genomes. The bryophyte Calohypnum plumiforme (formerly Hypnum plumaeforme) also produces momilactones, and the bifunctional diterpene cyclase gene CpDTC1/HpDTC1, which is responsible for the production of the diterpene framework, has been characterized. To understand the molecular architecture of the momilactone biosynthetic genes in the moss genome and their evolutionary relationships with other momilactone-producing plants, we sequenced and annotated the C. plumiforme genome. The data revealed a 150-kb genomic region that contains two cytochrome P450 genes, the CpDTC1/HpDTC1 gene and the "dehydrogenase momilactone A synthase" gene tandemly arranged and inductively transcribed following stress exposure. The predicted enzymatic functions in yeast and recombinant assay and the successful pathway reconstitution in Nicotiana benthamiana suggest that it is a functional BGC responsible for momilactone production. Furthermore, in a survey of genomic sequences of a broad range of plant species, we found that momilactone BGC is limited to the two grasses (Oryza and Echinochloa) and C. plumiforme, with no synteny among these genomes. These results indicate that while the gene cluster in C. plumiforme is functionally similar to that in rice and barnyard grass, it is likely a product of convergent evolution. To the best of our knowledge, this report of a BGC for a specialized plant defense metabolite in bryophytes is unique.
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Mele MA, Kang HM, Lee YT, Islam MZ. Grape terpenoids: flavor importance, genetic regulation, and future potential. Crit Rev Food Sci Nutr 2020; 61:1429-1447. [PMID: 32401037 DOI: 10.1080/10408398.2020.1760203] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Terpenes significantly affect the flavor and quality of grapes and wine. This review summarizes recent research on terpenoids with regard to grape wine. Although, the grapevine terpene synthase gene family is the largest identified, genetic modifications involving terpenes to improve wine flavor have received little attention. Key enzyme modulation alters metabolite production. Over the last decade, the heterologous manipulation of grape glycosidase has been used to alter terpenoids, and cytochrome P450s may affect terpene synthesis. Metabolic and genetic engineering can further modify terpenoid metabolism, while using transgenic grapevines (trait transfer to the plant) could yield more flavorful wine. We also discuss traits involved in wine aroma quality, and the strategies that can be used to improve grapevine breeding technology.
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Affiliation(s)
- Mahmuda Akter Mele
- Department of Horticulture, Kangwon National University, Chuncheon, Republic of Korea
| | - Ho-Min Kang
- Department of Horticulture, Kangwon National University, Chuncheon, Republic of Korea
| | - Young-Tack Lee
- Department of Food Science and Biotechnology, Gachon University, Seongnam, Republic of Korea
| | - Mohammad Zahirul Islam
- Department of Food Science and Biotechnology, Gachon University, Seongnam, Republic of Korea
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Li W, Li W, Yang S, Ma Z, Zhou Q, Mao J, Han S, Chen B. Transcriptome and Metabolite Conjoint Analysis Reveals that Exogenous Methyl Jasmonate Regulates Monoterpene Synthesis in Grape Berry Skin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:5270-5281. [PMID: 32338508 DOI: 10.1021/acs.jafc.0c00476] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Monoterpene is one of the important sources of varietal aroma, which provides a strong floral and fruity aroma in wines. Methyl jasmonate (MeJA) affects plant secondary metabolism. However, the regulatory mechanisms of monoterpene biosynthesis after MeJA application on grapes are not illuminated. In the present study, 10 mM MeJA was used as treatments in Italian Riesling grape at the preveraison stage in different ways, including grape cluster soaking, foliar spraying, and whole vine spraying, designated as T1, T2, and T3, respectively, while a blank group was used as the control (CK). HS-SPME/GC-MS and transcriptome sequencing analysis were performed to investigate the effect of exogenous MeJA on monoterpene synthesis in grape berry skin. The results of GC-MS showed that the application of MeJA induced the accumulation of volatile monoterpenes in grape berry skin, especially linalool, α-terpineol, and oxides. In addition, transcriptome analysis showed that differentially expressed genes were increased from T2 to T3 to T1 compared with CK, and significantly enriched in JA and monoterpene synthesis pathways. T1 application significantly upregulated the mRNA expression levels of LOX2S, AOS, OPR, and JMT involved in the JA biosynthesis pathway, as well as DXS, HMGCR, TPS14, and α-terpineol synthesis genes involved in the monoterpene synthesis pathway compared with T2, T3, and CK. Thus, grape cluster soaking treatment with MeJA could greatly activate volatile monoterpene synthesis. The results will deeply increase our understanding of the monoterpene biosynthesis of grape berry skin in response to MeJA.
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Affiliation(s)
- Wei Li
- College of Horticulture, Gansu Agricultural University, Lanzhou 730070, Gansu Province, China
| | - Wenfang Li
- College of Horticulture, Gansu Agricultural University, Lanzhou 730070, Gansu Province, China
| | - Shijin Yang
- College of Horticulture, Gansu Agricultural University, Lanzhou 730070, Gansu Province, China
| | - Zonghuan Ma
- College of Horticulture, Gansu Agricultural University, Lanzhou 730070, Gansu Province, China
| | - Qi Zhou
- College of Horticulture, Gansu Agricultural University, Lanzhou 730070, Gansu Province, China
| | - Juan Mao
- College of Horticulture, Gansu Agricultural University, Lanzhou 730070, Gansu Province, China
| | - Shunyu Han
- Gansu Key Laboratory of Viticulture and Enology, Lanzhou 730070, Gansu Province, China
| | - Baihong Chen
- College of Horticulture, Gansu Agricultural University, Lanzhou 730070, Gansu Province, China
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Hardion L, Perrier A, Martinez M, Navrot N, Gaquerel E, Tournay F, Nguefack J, Combroux I. Integrative revision of Dianthus superbus subspecies reveals different degrees of differentiation, from plasticity to species distinction. SYST BIODIVERS 2020. [DOI: 10.1080/14772000.2020.1737979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Laurent Hardion
- Laboratoire Image Ville Environnement (LIVE), University of Strasbourg, CNRS, Strasbourg, France
| | - Antoine Perrier
- Laboratoire Image Ville Environnement (LIVE), University of Strasbourg, CNRS, Strasbourg, France
- Department of Environmental Sciences, University of Basel, Basel, 4056, Switzerland
| | - Marion Martinez
- Faculty of Life Sciences, Herbarium of the University of Strasbourg (STR), Strasbourg, France
| | - Nicolas Navrot
- Institut de Biologie Moléculaire des Plantes (IBMP), University of Strasbourg, CNRS, Strasbourg, France
| | - Emmanuel Gaquerel
- Institut de Biologie Moléculaire des Plantes (IBMP), University of Strasbourg, CNRS, Strasbourg, France
| | - Frédéric Tournay
- Faculty of Life Sciences, Botanical Garden of the University of Strasbourg, Strasbourg, France
| | | | - Isabelle Combroux
- Laboratoire Image Ville Environnement (LIVE), University of Strasbourg, CNRS, Strasbourg, France
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Caseys C. Attract or Defend: The CYP-Associated Versatility of Terpenoids. THE PLANT CELL 2019; 31:2823. [PMID: 31628165 PMCID: PMC6925023 DOI: 10.1105/tpc.19.00814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- Céline Caseys
- Department of Plant SciencesUniversity of California, Davis
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36
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Boachon B, Burdloff Y, Ruan JX, Rojo R, Junker RR, Vincent B, Nicolè F, Bringel F, Lesot A, Henry L, Bassard JE, Mathieu S, Allouche L, Kaplan I, Dudareva N, Vuilleumier S, Miesch L, André F, Navrot N, Chen XY, Werck-Reichhart D. A Promiscuous CYP706A3 Reduces Terpene Volatile Emission from Arabidopsis Flowers, Affecting Florivores and the Floral Microbiome. THE PLANT CELL 2019; 31:2947-2972. [PMID: 31628167 PMCID: PMC6925022 DOI: 10.1105/tpc.19.00320] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 09/06/2019] [Accepted: 10/16/2019] [Indexed: 05/15/2023]
Abstract
Flowers are essential but vulnerable plant organs, exposed to pollinators and florivores; however, flower chemical defenses are rarely investigated. We show here that two clustered terpene synthase and cytochrome P450 encoding genes (TPS11 and CYP706A3) on chromosome 5 of Arabidopsis (Arabidopsis thaliana) are tightly coexpressed in floral tissues, upon anthesis and during floral bud development. TPS11 was previously reported to generate a blend of sesquiterpenes. By heterologous coexpression of TPS11 and CYP706A3 in yeast (Saccharomyces cerevisiae) and Nicotiana benthamiana, we demonstrate that CYP706A3 is active on TPS11 products and also further oxidizes its own primary oxidation products. Analysis of headspace and soluble metabolites in cyp706a3 and 35S:CYP706A3 mutants indicate that CYP706A3-mediated metabolism largely suppresses sesquiterpene and most monoterpene emissions from opening flowers, and generates terpene oxides that are retained in floral tissues. In flower buds, the combined expression of TPS11 and CYP706A3 also suppresses volatile emissions and generates soluble sesquiterpene oxides. Florivory assays with the Brassicaceae specialist Plutella xylostella demonstrate that insect larvae avoid feeding on buds expressing CYP706A3 and accumulating terpene oxides. Composition of the floral microbiome appears also to be modulated by CYP706A3 expression. TPS11 and CYP706A3 simultaneously evolved within Brassicaceae and form the most versatile functional gene cluster described in higher plants so far.plantcell;31/12/2947/FX1F1fx1.
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Affiliation(s)
- Benoît Boachon
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Unité Propre de Recherche 2357, Université de Strasbourg, 67084 Strasbourg, France
- Department of Biochemistry, Purdue University, West Lafayette, Indiana 47907
- University of Lyon, UJM-Saint-Etienne, CNRS, BVpam Formation de Recherche en Evolution 3727, 42000 Saint-Etienne, France
| | - Yannick Burdloff
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Unité Propre de Recherche 2357, Université de Strasbourg, 67084 Strasbourg, France
| | - Ju-Xin Ruan
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, University of CAS, Chinese Academy of Sciences, Shanghai 200032, China
- Plant Science Research Center, Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Botanical Garden, Shanghai 201602, China
| | - Rakotoharisoa Rojo
- Institute for Integrative Biology of the Cell (I2BC), iBiTec-S/SBSM, Commissariat à l'Energie Atomique, CNRS, Université Paris Sud, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Robert R Junker
- Evolutionary Ecology of Plants, Department Biodiversity of Plants, Faculty of Biology, Philipps-University Marburg, 35043 Marburg, Germany
| | - Bruno Vincent
- Plateforme d'Analyses pour la Chimie, GDS 3648, CNRS, Université de Strasbourg, 67000 Strasbourg, France
| | - Florence Nicolè
- University of Lyon, UJM-Saint-Etienne, CNRS, BVpam Formation de Recherche en Evolution 3727, 42000 Saint-Etienne, France
| | - Françoise Bringel
- Génétique Moléculaire, Génomique, Microbiologie, Université de Strasbourg, UMR 7156 CNRS, 67000 Strasbourg, France
| | - Agnès Lesot
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Unité Propre de Recherche 2357, Université de Strasbourg, 67084 Strasbourg, France
| | - Laura Henry
- Department of Biochemistry, Purdue University, West Lafayette, Indiana 47907
| | - Jean-Etienne Bassard
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Unité Propre de Recherche 2357, Université de Strasbourg, 67084 Strasbourg, France
| | - Sandrine Mathieu
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Unité Propre de Recherche 2357, Université de Strasbourg, 67084 Strasbourg, France
| | - Lionel Allouche
- Evolutionary Ecology of Plants, Department Biodiversity of Plants, Faculty of Biology, Philipps-University Marburg, 35043 Marburg, Germany
| | - Ian Kaplan
- Department of Entomology, Purdue University, West Lafayette, Indiana 47907
| | - Natalia Dudareva
- Department of Biochemistry, Purdue University, West Lafayette, Indiana 47907
| | - Stéphane Vuilleumier
- Plateforme d'Analyses pour la Chimie, GDS 3648, CNRS, Université de Strasbourg, 67000 Strasbourg, France
- Génétique Moléculaire, Génomique, Microbiologie, Université de Strasbourg, UMR 7156 CNRS, 67000 Strasbourg, France
| | - Laurence Miesch
- Equipe de Synthèse Organique et Phytochimie, Institut de Chimie, Unité Mixte de Recherche 7177, CNRS, Université de Strasbourg, 67000 Strasbourg, France
| | - François André
- Institute for Integrative Biology of the Cell (I2BC), iBiTec-S/SBSM, Commissariat à l'Energie Atomique, CNRS, Université Paris Sud, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Nicolas Navrot
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Unité Propre de Recherche 2357, Université de Strasbourg, 67084 Strasbourg, France
| | - Xiao-Ya Chen
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, University of CAS, Chinese Academy of Sciences, Shanghai 200032, China
- Plant Science Research Center, Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Botanical Garden, Shanghai 201602, China
| | - Danièle Werck-Reichhart
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique (CNRS), Unité Propre de Recherche 2357, Université de Strasbourg, 67084 Strasbourg, France
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Zheng X, Li P, Lu X. Research advances in cytochrome P450-catalysed pharmaceutical terpenoid biosynthesis in plants. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:4619-4630. [PMID: 31037306 DOI: 10.1093/jxb/erz203] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 04/18/2019] [Indexed: 06/09/2023]
Abstract
Terpenoids, the biggest class of plant secondary metabolites, have a wide range of significant physiological roles, while many of them are important natural drugs. Biosynthesis of pharmaceutical terpenoids in plants is a fairly complex process, most of which involves cytochrome P450 (CYP450) monooxygenases. CYP450 enzymes are versatile biocatalysts that play critical roles in terpenoid skeleton modification and structural diversity. Therefore, the discovery and identification of CYP450 genes is significant for elucidating the terpenoid biosynthetic pathway. This review summarizes the progress and cloning strategies relating to CYP450s in pharmaceutical terpenoid biosynthesis of the past decade.
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Affiliation(s)
- Xiaoyan Zheng
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Ping Li
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Xu Lu
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
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38
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Zhang H, Liu C, Yao JL, Deng CH, Chen S, Chen J, Wang Z, Yu Q, Cheng Y, Xu J. Citrus mangshanensis Pollen Confers a Xenia Effect on Linalool Oxide Accumulation in Pummelo Fruit by Enhancing the Expression of a Cytochrome P450 78A7 Gene CitLO1. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:9468-9476. [PMID: 31379158 DOI: 10.1021/acs.jafc.9b03158] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The aroma quality of citrus fruit is determined by volatiles that are present at extremely low levels in the citrus fruit juice sacs; it can be greatly improved by increasing volatiles. In this study, we showed that the contents of cis- and trans-linalool oxides were significantly increased in the juice sacs of three pummelos artificially pollinated with the Citrus mangshanensis (MS) pollen. A novel cytochrome P450 78A7 gene (CitLO1) was significantly upregulated in the juice sacs of Huanong Red pummelo pollinated with MS pollen in comparison to that with open pollination. Compared to wild-type tobacco Bright-Yellow2 cells, transgenic cells overexpressing CitLO1 promoted a 3- to 4-fold more conversion of (-)-linalool to cis- and trans-linalool oxides. Overall, our results suggest that MS pollen has a xenia effect on pummelo fruit aroma quality, and CitLO1 is a linalool oxide synthase gene that played an important role in the xenia effect.
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Affiliation(s)
- Haipeng Zhang
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry , Huazhong Agricultural University , Wuhan 430070 , P. R. China
| | - Cuihua Liu
- College of Horticulture , Northwest A&F University , Yangling , Shaanxi 712100 , P. R. China
| | - Jia-Long Yao
- The New Zealand Institute for Plant & Food Research Limited , Private Bag 92169 , Auckland 1142 , New Zealand
| | - Cecilia Hong Deng
- The New Zealand Institute for Plant & Food Research Limited , Private Bag 92169 , Auckland 1142 , New Zealand
| | - Shilin Chen
- Agricultural Bureau of Yichang District , Yiling 443310 , P. R. China
| | - Jiajing Chen
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry , Huazhong Agricultural University , Wuhan 430070 , P. R. China
| | - Zhenhua Wang
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry , Huazhong Agricultural University , Wuhan 430070 , P. R. China
| | - Qiaoming Yu
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry , Huazhong Agricultural University , Wuhan 430070 , P. R. China
| | - Yunjiang Cheng
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry , Huazhong Agricultural University , Wuhan 430070 , P. R. China
| | - Juan Xu
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry , Huazhong Agricultural University , Wuhan 430070 , P. R. China
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Xu Y, Tong Z, Zhang X, Wang Y, Fang W, Li L, Luo Z. Unveiling the Mechanisms for the Plant Volatile Organic Compound Linalool To Control Gray Mold on Strawberry Fruits. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:9265-9276. [PMID: 31361479 DOI: 10.1021/acs.jafc.9b03103] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Fungal infections significantly alter the emissions of volatile organic compounds (VOCs) by plants, but the mechanisms for VOCs affecting fungal infections of plants remain largely unknown. Here, we found that infection by Botrytis cinerea upregulated linalool production by strawberries and fumigation with linalool was able to inhibit the infection of fruits by the fungus. Linalool treatment downregulated the expression of rate-limiting enzymes in the ergosterol biosynthesis pathway, and this reduced the ergosterol content in the fungi cell membrane and impaired membrane integrity. Linalool treatment also caused damage to mitochondrial membranes by collapsing mitochondrial membrane potential and also downregulated genes involved in adenosine triphosphate (ATP) production, resulting in a significant decrease in the ATP content. Linalool treatment increased the levels of reactive oxygen species (ROS), in response to which the treated fungal cells produced more of the ROS scavenger pyruvate. RNA-Seq and proteomic analysis data showed that linalool treatment slowed the rates of transcription and translation.
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Affiliation(s)
- Yanqun Xu
- Ningbo Research Institute , Zhejiang University , Ningbo , Zhejiang 315100 , People's Republic of China
| | | | | | | | | | | | - Zisheng Luo
- Ningbo Research Institute , Zhejiang University , Ningbo , Zhejiang 315100 , People's Republic of China
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He J, Fandino RA, Halitschke R, Luck K, Köllner TG, Murdock MH, Ray R, Gase K, Knaden M, Baldwin IT, Schuman MC. An unbiased approach elucidates variation in ( S)-(+)-linalool, a context-specific mediator of a tri-trophic interaction in wild tobacco. Proc Natl Acad Sci U S A 2019; 116:14651-14660. [PMID: 31262827 PMCID: PMC6642400 DOI: 10.1073/pnas.1818585116] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Plant volatile organic compounds (VOCs) mediate many interactions, and the function of common VOCs is especially likely to depend on ecological context. We used a genetic mapping population of wild tobacco, Nicotiana attenuata, originating from a cross of 2 natural accessions from Arizona and Utah, separated by the Grand Canyon, to dissect genetic variation controlling VOCs. Herbivory-induced leaf terpenoid emissions varied substantially, while green leaf volatile emissions were similar. In a field experiment, only emissions of linalool, a common VOC, correlated significantly with predation of the herbivore Manduca sexta by native predators. Using quantitative trait locus mapping and genome mining, we identified an (S)-(+)-linalool synthase (NaLIS). Genome resequencing, gene cloning, and activity assays revealed that the presence/absence of a 766-bp sequence in NaLIS underlies the variation of linalool emissions in 26 natural accessions. We manipulated linalool emissions and composition by ectopically expressing linalool synthases for both enantiomers, (S)-(+)- and (R)-(-)-linalool, reported to oppositely affect M. sexta oviposition, in the Arizona and Utah accessions. We used these lines to test ovipositing moths in increasingly complex environments. The enantiomers had opposite effects on oviposition preference, but the magnitude of the effect depended strongly both on plant genetic background, and complexity of the bioassay environment. Our study reveals that the emission of linalool, a common VOC, differs by orders-of-magnitude among geographically interspersed conspecific plants due to allelic variation in a linalool synthase, and that the response of a specialist herbivore to linalool depends on enantiomer, plant genotype, and environmental complexity.
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Affiliation(s)
- Jun He
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany
| | - Richard A Fandino
- Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany
| | - Rayko Halitschke
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany
| | - Katrin Luck
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany
| | - Tobias G Köllner
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany
| | - Mark H Murdock
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany
- College of Life Sciences, Brigham Young University, Provo, UT 84606
| | - Rishav Ray
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany
| | - Klaus Gase
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany
| | - Markus Knaden
- Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany
| | - Ian T Baldwin
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany;
| | - Meredith C Schuman
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany;
- Department of Geography, University of Zurich, 8057 Zürich, Switzerland
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Li H, Li J, Dong Y, Hao H, Ling Z, Bai H, Wang H, Cui H, Shi L. Time-series transcriptome provides insights into the gene regulation network involved in the volatile terpenoid metabolism during the flower development of lavender. BMC PLANT BIOLOGY 2019; 19:313. [PMID: 31307374 PMCID: PMC6632208 DOI: 10.1186/s12870-019-1908-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 06/27/2019] [Indexed: 05/18/2023]
Abstract
BACKGROUND Essential oils (EOs) of Lavandula angustifolia, mainly consist of monoterpenoids and sesquiterpenoids, are of great commercial value. The multi-flower spiciform thyrse of lavender not only determines the output of EOs but also reflects an environmental adaption strategy. With the flower development and blossom in turn, the fluctuation of the volatile terpenoids displayed a regular change at each axis. However, the molecular mechanism underlying the regulation of volatile terpenoids during the process of flowering is poorly understood in lavender. Here, we combine metabolite and RNA-Seq analyses of flowers of five developmental stages at first- and second-axis (FFDSFSA) and initial flower bud (FB0) to discover the active terpenoid biosynthesis as well as flowering-related genes. RESULTS A total of 56 mono- and sesquiterpenoids were identified in the EOs of L. angustifolia 'JX-2'. FB0' EO consists of 55 compounds and the two highest compounds, β-trans-ocimene (20.57%) and (+)-R-limonene (17.00%), can get rid of 74.71 and 78.41% aphids in Y-tube olfactometer experiments, respectively. With sequential and successive blossoms, temporally regulated volatiles were linked to pollinator attraction in field and olfaction bioassays. In three characteristic compounds of FFDSFSA' EOs, linalyl acetate (72.73%) and lavandulyl acetate (72.09%) attracted more bees than linalool (45.35%). Many transcripts related to flowering time and volatile terpenoid metabolism expressed differently during the flower development. Similar metabolic and transcriptomic profiles were observed when florets from the two axes were maintained at the same maturity grade. Besides both compounds and differentially expressed genes were rich in FB0, most volatile compounds were significantly correlated with FB0-specific gene module. Most key regulators related to flowering and terpenoid metabolism were interconnected in the subnetwork of FB0-specific module, suggesting the cross-talk between the two biological processes to some degree. CONCLUSIONS Characteristic compounds and gene expression profile of FB0 exhibit ecological value in pest control. The precise control of each-axis flowering and regular emissions at transcriptional and metabolic level are important to pollinators attraction for lavender. Our study sheds new light on lavender maximizes its fitness from "gene-volatile terpenoid-insect" three layers.
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Affiliation(s)
- Hui Li
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, 100093 China
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Beijing Forestry University, Beijing, 100083 China
| | - Jingrui Li
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, 100093 China
- University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Yanmei Dong
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, 100093 China
- University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Haiping Hao
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, 100093 China
| | - Zhengyi Ling
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, 100093 China
- University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Hongtong Bai
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, 100093 China
| | - Huafang Wang
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Beijing Forestry University, Beijing, 100083 China
| | - Hongxia Cui
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, 100093 China
| | - Lei Shi
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, 100093 China
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42
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Chen X, Luck K, Rabe P, Dinh CQ, Shaulsky G, Nelson DR, Gershenzon J, Dickschat JS, Köllner TG, Chen F. A terpene synthase-cytochrome P450 cluster in Dictyostelium discoideum produces a novel trisnorsesquiterpene. eLife 2019; 8:44352. [PMID: 31063135 PMCID: PMC6524965 DOI: 10.7554/elife.44352] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 05/03/2019] [Indexed: 12/14/2022] Open
Abstract
Terpenoids are enormously diverse, but our knowledge of their biosynthesis and functions is limited. Here we report on a terpene synthase (DdTPS8)-cytochrome P450 (CYP521A1) gene cluster that produces a novel C12 trisnorsesquiterpene and affects the development of Dictyostelium discoideum. DdTPS8 catalyzes the formation of a sesquiterpene discoidol, which is undetectable from the volatile bouquet of wild type D. discoideum. Interestingly, a DdTPS8 knockout mutant lacks not only discoidol, but also a putative trisnorsesquiterpene. This compound was hypothesized to be derived from discoidol via cytochrome P450 (CYP)-catalyzed oxidative cleavage. CYP521A1, which is clustered with DdTPS8, was identified as a top candidate. Biochemical assays demonstrated that CYP521A1 catalyzes the conversion of discoidol to a novel trisnorsesquiterpene named discodiene. The DdTPS8 knockout mutant exhibited slow progression in development. This study points to the untapped diversity of natural products made by D. discoideum, which may have diverse roles in its development and chemical ecology.
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Affiliation(s)
- Xinlu Chen
- Department of Plant Sciences, University of Tennessee, Knoxville, United States
| | - Katrin Luck
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Patrick Rabe
- Kekulé-Institute of Organic Chemistry and Biochemistry, University of Bonn, Bonn, Germany
| | - Christopher Qd Dinh
- Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, United States
| | - Gad Shaulsky
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, United States
| | - David R Nelson
- Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, United States
| | - Jonathan Gershenzon
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Jeroen S Dickschat
- Kekulé-Institute of Organic Chemistry and Biochemistry, University of Bonn, Bonn, Germany
| | - Tobias G Köllner
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Feng Chen
- Department of Plant Sciences, University of Tennessee, Knoxville, United States
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43
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Mao J, He Z, Hao J, Liu T, Chen J, Huang S. Identification, expression, and phylogenetic analyses of terpenoid biosynthesis-related genes in secondary xylem of loblolly pine ( Pinus taeda L.) based on transcriptome analyses. PeerJ 2019; 7:e6124. [PMID: 30723613 PMCID: PMC6360084 DOI: 10.7717/peerj.6124] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 11/18/2018] [Indexed: 01/30/2023] Open
Abstract
Loblolly pine (Pinus taeda L.) is one of the most important species for oleoresin (a mixture of terpenoids) in South China. The high oleoresin content of loblolly pine is associated with resistance to bark beetles and other economic benefits. In this study, we conducted transcriptome analyses of loblolly pine secondary xylem to gain insight into the genes involved in terpenoid biosynthesis. A total of 372 unigenes were identified as being critical for oleoresin production, including genes for ATP-binding cassette (ABC) transporters, the cytochrome P450 (CYP) protein family, and terpenoid backbone biosynthesis enzymes. Six key genes involved in terpenoid biosynthetic pathways were selected for multiple sequence alignment, conserved motif prediction, and phylogenetic and expression profile analyses. The protein sequences of all six genes exhibited a higher degree of sequence conservation, and upstream genes were relatively more conserved than downstream genes in terpenoid biosynthetic pathways. The N-terminal regions of these sequences were less conserved than the C-terminal ends, as the N-terminals were quite diverse in both length and composition. The phylogenetic analyses revealed that most genes originated from gene duplication after species divergence, and partial genes exhibited incomplete lineage sorting. In addition, the expression profile analyses showed that all six genes exhibited high expression levels during the high-oleoresin-yielding phase.
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Affiliation(s)
- Jipeng Mao
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, Guangdong, China
| | - Zidi He
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, Guangdong, China
| | - Jing Hao
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, Guangdong, China
| | - Tianyi Liu
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, Guangdong, China
| | - Jiehu Chen
- Science Corporation of Gene, Guangzhou, Guangdong, China
| | - Shaowei Huang
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, Guangdong, China
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44
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Abbas F, Ke Y, Yu R, Fan Y. Functional characterization and expression analysis of two terpene synthases involved in floral scent formation in Lilium 'Siberia'. PLANTA 2019; 249:71-93. [PMID: 30218384 DOI: 10.1007/s00425-018-3006-7] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Accepted: 09/06/2018] [Indexed: 05/22/2023]
Abstract
Floral scent formation in Lilium 'Siberia' is mainly due to monoterpene presence in the floral profile. LoTPS1 and LoTPS3 are responsible for the formation of (±)-linalool and β-ocimene in Lilium 'Siberia'. Lilium 'Siberia' is a perennial herbaceous plant belonging to Liliaceae family, cultivated both as a cut flower and garden plant. The snowy white flower emits a pleasant aroma which is mainly caused by monoterpenes present in the floral volatile profile. Previously terpene synthase (TPS) genes have been isolated and characterized from various plant species but less have been identified from Liliaceae family. Here, two terpene synthase genes (LoTPS1 and LoTPS3), which are highly expressed in sepals and petals of Lilium 'Siberia' flower were functionally characterized recombinant LoTPS1 specifically catalyzes the formation of (Z)-β-ocimene and (±)-linalool as its main volatile compounds from geranyl pyrophosphate (GPP), whereas LoTPS3 is a promiscuous monoterpene synthase which utilizes both GPP and farnesyl pyrophosphate (FPP) as a substrate to generate (±)-linalool and cis-nerolidol, respectively. Transcript levels of both genes were prominent in flowering parts, especially in sepals and petals which are the main source of floral scent production. The gas chromatography-mass spectrometry (GC-MS) and quantitative real-time PCR analysis revealed that the compounds were emitted throughout the day, prominently during the daytime and lower levels at night following a strong circadian rhythm in their emission pattern. Regarding mechanical wounding, both genes showed considerable involvement in floral defense by inducing the emission of (Z)-β-ocimene and (±)-linalool, elevating the transcript accumulation of LoTPS1 and LoTPS3. Furthermore, the subcellular localization experiment revealed that LoTPS1 was localized in plastids, whilst LoTPS3 in mitochondria. Our findings on these two TPSs characterized from Lilium 'Siberia' provide new insights into molecular mechanisms of terpene biosynthesis in this species and also provide an opportunity for biotechnological modification of floral scent profile of Lilium.
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Affiliation(s)
- Farhat Abbas
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
- Department of Horticulture, College of Agriculture, University of Sargodha, Punjab, Pakistan
| | - Yanguo Ke
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Rangcai Yu
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China.
| | - Yanping Fan
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China.
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, South China Agricultural University, Guangzhou, 510642, China.
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45
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Pichersky E, Raguso RA. Why do plants produce so many terpenoid compounds? THE NEW PHYTOLOGIST 2018; 220:692-702. [PMID: 27604856 DOI: 10.1111/nph.14178] [Citation(s) in RCA: 293] [Impact Index Per Article: 48.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 08/02/2016] [Indexed: 05/19/2023]
Abstract
All plants synthesize a suite of several hundred terpenoid compounds with roles that include phytohormones, protein modification reagents, anti-oxidants, and more. Different plant lineages also synthesize hundreds of distinct terpenoids, with the total number of such specialized plant terpenoids estimated in the scores of thousands. Phylogenetically restricted terpenoids are implicated in defense or in the attraction of beneficial organisms. A popular hypothesis is that the ability of plants to synthesize new compounds arose incrementally by selection when, as a result of gradual changes in their biotic partners and enemies, the 'old' plant compounds were no longer effective, a process dubbed the 'coevolutionary arms race'. Another hypothesis posits that often the sheer diversity of such compounds provides benefits that a single compound cannot. In this article, we review the unique features of the biosynthetic apparatus of terpenes in plants that facilitate the production of large numbers of distinct terpenoids in each species and how facile genetic and biochemical changes can lead to the further diversification of terpenoids. We then discuss evidence relating to the hypotheses that given ecological functions may be enhanced by the presence of mixtures of terpenes and that the acquisition of new functions by terpenoids may favor their retention once the original functions are lost.
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Affiliation(s)
- Eran Pichersky
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Michigan, MI, 48109, USA
| | - Robert A Raguso
- Department of Neurobiology and Behavior, Cornell University, Ithaca, NY, 14853, USA
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46
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Giuliani C, Ascrizzi R, Lupi D, Tassera G, Santagostini L, Giovanetti M, Flamini G, Fico G. Salvia verticillata: Linking glandular trichomes, volatiles and pollinators. PHYTOCHEMISTRY 2018; 155:53-60. [PMID: 30077120 DOI: 10.1016/j.phytochem.2018.07.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 07/21/2018] [Accepted: 07/24/2018] [Indexed: 06/08/2023]
Abstract
Plants have developed a plethora of signals to interact with other organisms, finally building up a sophisticate language for communication. In this context, we investigated Salvia verticillata L. (Lamiaceae), with the primary goal to link secondary metabolites and actual biotic relationships. We specifically analysed the volatile organic compounds (VOC) spontaneously emitted by leaves and flowers and determined the composition of the essential oils obtained from the aerial parts across 2015 and 2016. We merged information of chemical analyses to a micromorphological investigation on the glandular indumentum and to focal observations on the pollinator assemblage. The VOC profiles were highly variable, with the floral bouquet being the most complex. Flowers and leaves showed 37 and 20 exclusive compounds, dominated by 1,8-cineole (10.4%) and germacrene D (38.4%), respectively. Sesquiterpene hydrocarbons prevailed (83.3% leaves; 73.7% flowers) and 19 common compounds were detected. The oil profiles proved to be consistent across the two years: sesquiterpene hydrocarbons invariably dominated, with germacrene D, bicyclogermacrene and β-caryophyllene as main compounds. The whole plant epidermis is thickly covered by two types of glandular hairs: peltates and small capitates, both responsible for the synthesis of terpenes, finally resulting in the VOC emission and in the essential oil production. S. verticillata attracted mainly bees belonging to two functional groups: medium-sized and large bees, notwithstanding the small size of its flowers. At the site, Apis mellifera and different Bombus species were recorded, mainly interested in feeding on nectar. The literature survey on the isolated volatile compounds confirmed the hypotheses on the seduction strategies towards Apoidea.
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Affiliation(s)
- Claudia Giuliani
- Department of Pharmaceutical Sciences, University of Milan, Via Mangiagalli 25, I-20133, Milan, Italy; Ghirardi Botanic Garden, Department of Pharmaceutical Sciences, University of Milan, Via Religione 25, I-25088, Toscolano Maderno, Brescia, Italy
| | - Roberta Ascrizzi
- Department of Pharmacy, University of Pisa, Via Bonanno 6, I-56126, Pisa, Italy
| | - Daniela Lupi
- Department of Food, Environmental and Nutritional Sciences, University of Milan, Via Celoria 2, I-20133, Milan, Italy
| | - Giacomo Tassera
- Department of Pharmaceutical Sciences, University of Milan, Via Mangiagalli 25, I-20133, Milan, Italy; Ghirardi Botanic Garden, Department of Pharmaceutical Sciences, University of Milan, Via Religione 25, I-25088, Toscolano Maderno, Brescia, Italy
| | | | - Manuela Giovanetti
- Centre for Ecology, Evolution and Environmental Change, University of Lisbon, Campo Grande, 1749-016, Lisbon, Portugal
| | - Guido Flamini
- Department of Pharmacy, University of Pisa, Via Bonanno 6, I-56126, Pisa, Italy
| | - Gelsomina Fico
- Department of Pharmaceutical Sciences, University of Milan, Via Mangiagalli 25, I-20133, Milan, Italy; Ghirardi Botanic Garden, Department of Pharmaceutical Sciences, University of Milan, Via Religione 25, I-25088, Toscolano Maderno, Brescia, Italy.
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47
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Characterization of somatic embryogenesis initiated from the Arabidopsis shoot apex. Dev Biol 2018; 442:13-27. [DOI: 10.1016/j.ydbio.2018.04.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 04/16/2018] [Accepted: 04/24/2018] [Indexed: 12/20/2022]
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48
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Kawade K, Li Y, Koga H, Sawada Y, Okamoto M, Kuwahara A, Tsukaya H, Hirai MY. The cytochrome P450 CYP77A4 is involved in auxin-mediated patterning of the Arabidopsis thaliana embryo. Development 2018; 145:145/17/dev168369. [PMID: 30213790 DOI: 10.1242/dev.168369] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 07/30/2018] [Indexed: 12/30/2022]
Abstract
Metabolism often plays an important role in developmental control, in addition to supporting basal physiological requirements. However, our understanding of this interaction remains limited. Here, we performed quantitative phenome analysis of Arabidopsis thaliana cytochrome P450 mutants to identify a novel interaction between development and metabolism. We found that cyp77a4 mutants exhibit specific defects in cotyledon development, including asymmetric positioning and cup-shaped morphology, which could be rescued by introducing the CYP77A4 gene. Microscopy revealed that the abnormal patterning was detected at least from the 8-cell stage of the cyp77a4 embryos. We next analysed auxin distribution in mutant embryos, as the phenotypes resembled those of auxin-related mutants. We found that the auxin response pattern was severely perturbed in the cyp77a4 embryos owing to an aberrant distribution of the auxin efflux carrier PIN1. CYP77A4 intracellularly localised to the endoplasmic reticulum, which is consistent with the notion that this enzyme acts as an epoxidase of unsaturated fatty acids in the microsomal fraction. We propose that the CYP77A4-dependent metabolic pathway is an essential element for the establishment of polarity in plant embryos.
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Affiliation(s)
- Kensuke Kawade
- Okazaki Institute for Integrative Bioscience, 5-1, Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan .,National Institute for Basic Biology, 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan.,Department of Basic Biology, School of Life Science, Graduate University for Advanced Studies (SOKENDAI), 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan.,RIKEN Center for Sustainable Resource Science, 1-7-22, Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan
| | - Yimeng Li
- RIKEN Center for Sustainable Resource Science, 1-7-22, Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan
| | - Hiroyuki Koga
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yuji Sawada
- RIKEN Center for Sustainable Resource Science, 1-7-22, Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan
| | - Mami Okamoto
- RIKEN Center for Sustainable Resource Science, 1-7-22, Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan
| | - Ayuko Kuwahara
- RIKEN Center for Sustainable Resource Science, 1-7-22, Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan
| | - Hirokazu Tsukaya
- Okazaki Institute for Integrative Bioscience, 5-1, Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan.,Department of Biological Sciences, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masami Yokota Hirai
- RIKEN Center for Sustainable Resource Science, 1-7-22, Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan
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49
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Hattan JI, Shindo K, Sasaki T, Ohno F, Tokuda H, Ishikawa K, Misawa N. Identification of novel sesquiterpene synthase genes that mediate the biosynthesis of valerianol, which was an unknown ingredient of tea. Sci Rep 2018; 8:12474. [PMID: 30127518 PMCID: PMC6102311 DOI: 10.1038/s41598-018-30653-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 08/03/2018] [Indexed: 01/06/2023] Open
Abstract
Seven cDNA clones encoding terpene synthases (TPSs), their structures closely related to each other, were isolated from the flower of Camellia hiemalis (‘Kantsubaki’). Their putative TPS proteins were phylogenetically positioned in a sole clade with the TPSs of other Camellia species. The obtained Tps genes, one of which was designated ChTps1 (ChTps1a), were introduced into mevalonate-pathway-engineered Escherichia coli, which carried the genes for utilizing acetoacetate as a substrate, and cultured in a medium including lithium acetoacetate. Volatile products generated in the E. coli cells transformed with ChTps1 were purified from the cell suspension culture, and analyzed by NMR. Consequently, the predominant product with ChTPS1 was identified as valerianol, indicating that the ChTps1 gene codes for valerianol synthase. This is the first report on a gene that can mediate the synthesis of valerianol. We next synthesized a Tps ortholog encoding ChTPS1variant R477H (named CsiTPS8), whose sequence had been isolated from a tea tree (Camellia sinensis), carried out similar culture experiment with the E. coli transformant including CsiTps8, and consequently found valerianol production equally. Furthermore, GC-MS analysis of several teas revealed that valerianol had been an unknown ingredient in green tea and black tea.
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Affiliation(s)
- Jun-Ichiro Hattan
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, 1-308 Suematsu, Nonoichi-shi, Ishikawa, 921-8836, Japan
| | - Kazutoshi Shindo
- Department of Food and Nutrition, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo, 112-8681, Japan
| | - Tetsuya Sasaki
- Industrial Research Institute of Ishikawa, 2-1 Kuratsuki, Kanazawa-shi, Ishikawa, 920-8203, Japan
| | - Fumina Ohno
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, 1-308 Suematsu, Nonoichi-shi, Ishikawa, 921-8836, Japan
| | - Harukuni Tokuda
- Department of Complementary and Alternative Medicine, Clinical R&D, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa-shi, Ishikawa, 920-8640, Japan
| | - Kazuhiko Ishikawa
- National Institute of Advanced Industrial Science and Technology, 1-8-31 Midorigaoka, Ikeda-shi, Osaka, 563-8577, Japan
| | - Norihiko Misawa
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, 1-308 Suematsu, Nonoichi-shi, Ishikawa, 921-8836, Japan.
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50
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Ilc T, Arista G, Tavares R, Navrot N, Duchêne E, Velt A, Choulet F, Paux E, Fischer M, Nelson DR, Hugueney P, Werck-Reichhart D, Rustenholz C. Annotation, classification, genomic organization and expression of the Vitis vinifera CYPome. PLoS One 2018; 13:e0199902. [PMID: 29953551 PMCID: PMC6023221 DOI: 10.1371/journal.pone.0199902] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 06/15/2018] [Indexed: 12/26/2022] Open
Abstract
Cytochromes P450 are enzymes that participate in a wide range of functions in plants, from hormonal signaling and biosynthesis of structural polymers, to defense or communication with other organisms. They represent one of the largest gene/protein families in the plant kingdom. The manual annotation of cytochrome P450 genes in the genome of Vitis vinifera PN40024 revealed 579 P450 sequences, including 279 complete genes. Most of the P450 sequences in grapevine genome are organized in physical clusters, resulting from tandem or segmental duplications. Although most of these clusters are small (2 to 35, median = 3), some P450 families, such as CYP76 and CYP82, underwent multiple duplications and form large clusters of homologous sequences. Analysis of gene expression revealed highly specific expression patterns, which are often the same within the genes in large physical clusters. Some of these genes are induced upon biotic stress, which points to their role in plant defense, whereas others are specifically activated during grape berry ripening and might be responsible for the production of berry-specific metabolites, such as aroma compounds. Our work provides an exhaustive and robust annotation including clear identification, structural organization, evolutionary dynamics and expression patterns for the grapevine cytochrome P450 families, paving the way to efficient functional characterization of genes involved in grapevine defense pathways and aroma biosynthesis.
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Affiliation(s)
- Tina Ilc
- Institute of Plant Molecular Biology, Centre National de la Recherche Scientifique, Université de Strasbourg, Strasbourg, France
| | - Gautier Arista
- Université de Strasbourg, INRA, SVQV UMR-A 1131, Colmar, France
| | - Raquel Tavares
- Laboratoire de Biométrie et Biologie Evolutive, Centre National de la Recherche Scientifique, Université de Lyon 1, Lyon, France
| | - Nicolas Navrot
- Institute of Plant Molecular Biology, Centre National de la Recherche Scientifique, Université de Strasbourg, Strasbourg, France
| | - Eric Duchêne
- Université de Strasbourg, INRA, SVQV UMR-A 1131, Colmar, France
| | - Amandine Velt
- Université de Strasbourg, INRA, SVQV UMR-A 1131, Colmar, France
| | - Frédéric Choulet
- Laboratoire Structure et Evolution du Génome du Blé, Institut National de la Recherche Agronomique, Université Blaise Pascal, Clermont-Ferrand, France
| | - Etienne Paux
- Laboratoire Structure et Evolution du Génome du Blé, Institut National de la Recherche Agronomique, Université Blaise Pascal, Clermont-Ferrand, France
| | - Marc Fischer
- Université de Strasbourg, INRA, SVQV UMR-A 1131, Colmar, France
| | - David R. Nelson
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | | | - Danièle Werck-Reichhart
- Institute of Plant Molecular Biology, Centre National de la Recherche Scientifique, Université de Strasbourg, Strasbourg, France
| | - Camille Rustenholz
- Université de Strasbourg, INRA, SVQV UMR-A 1131, Colmar, France
- * E-mail:
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