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Rong N, Huang L, Ye P, Pan H, Hu M, Bai M, Wu H. CgLS mediates limonene synthesis of main essential oil component in secretory cavity cells of Citrus grandis 'Tomentosa' fruits. Int J Biol Macromol 2024; 280:135671. [PMID: 39284463 DOI: 10.1016/j.ijbiomac.2024.135671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 09/09/2024] [Accepted: 09/13/2024] [Indexed: 09/22/2024]
Abstract
d-Limonene is the predominant component of essential oil from Exocarpium Citri Grandis, known for its antibacterial, antioxidant, insecticidal, and anti-inflammatory properties. The synthesis, transport, and accumulation of d-limonene in Citrus grandis 'Tomentosa' fruits are regulated by limonene synthase (LS) and its associated regulatory genes. This study addresses the gap in understanding the spatiotemporal cytological changes of LS and its regulatory genes. Through cytochemical techniques, we investigated the distribution of essential oil in the plastids, endoplasmic reticulum, and vacuoles of secretory cavity cells. We identified the LS-encoding gene CgLS via transcriptomics and demonstrated in vitro that CgLS catalyzes the formation of d-limonene from geranyl diphosphate (GPP). Transient overexpression of CgLS increased monoterpene limonene accumulation, while TRV virus-induced gene silencing reduced it. CgLS expression levels and d-limonene content showed spatiotemporal consistency with fruit development, with in situ hybridization revealing predominant expression in secretory cavity cells. Immunocytochemical localization indicated that CgLS is primarily located in the endoplasmic reticulum, plastids, and vacuoles. Our findings suggest that CgLS is translated in the endoplasmic reticulum and transported to plastids and vacuoles where d-limonene synthesis occurs. This study provides comprehensive insights into the characteristics of CgLS and its role in d-limonene synthesis at the tissue, cellular, and molecular levels in C. grandis 'Tomentosa'.
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Affiliation(s)
- Ning Rong
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Guangdong Technology Research Center for Traditional Chinese Veterinary Medicine and Natural Medicine, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Guangdong Key Laboratory for Innovative Developmentand Utilization of Forest Plant Germplasm, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Center for Medicinal Plants Research, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Liying Huang
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Guangdong Technology Research Center for Traditional Chinese Veterinary Medicine and Natural Medicine, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Guangdong Key Laboratory for Innovative Developmentand Utilization of Forest Plant Germplasm, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Center for Medicinal Plants Research, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Peng Ye
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Guangdong Technology Research Center for Traditional Chinese Veterinary Medicine and Natural Medicine, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Guangdong Key Laboratory for Innovative Developmentand Utilization of Forest Plant Germplasm, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Center for Medicinal Plants Research, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Huimin Pan
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Guangdong Technology Research Center for Traditional Chinese Veterinary Medicine and Natural Medicine, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Guangdong Key Laboratory for Innovative Developmentand Utilization of Forest Plant Germplasm, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Center for Medicinal Plants Research, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Mingli Hu
- School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Mei Bai
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Youchenliu Road, Maoming 525000, China; Guangdong Technology Research Center for Traditional Chinese Veterinary Medicine and Natural Medicine, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Guangdong Key Laboratory for Innovative Developmentand Utilization of Forest Plant Germplasm, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Center for Medicinal Plants Research, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China.
| | - Hong Wu
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Guangdong Technology Research Center for Traditional Chinese Veterinary Medicine and Natural Medicine, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Guangdong Key Laboratory for Innovative Developmentand Utilization of Forest Plant Germplasm, South China Agricultural University, Wushan Road, Guangzhou 510642, China; Center for Medicinal Plants Research, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China.
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Sun Q, He L, Sun L, Xu HY, Fu YQ, Sun ZY, Zhu BQ, Duan CQ, Pan QH. Identification of SNP loci and candidate genes genetically controlling norisoprenoids in grape berry based on genome-wide association study. FRONTIERS IN PLANT SCIENCE 2023; 14:1142139. [PMID: 36938056 PMCID: PMC10014734 DOI: 10.3389/fpls.2023.1142139] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 02/13/2023] [Indexed: 06/18/2023]
Abstract
Obtaining new grapevine varieties with unique aromas has been a long-standing goal of breeders. Norisoprenoids are of particular interest to wine producers and researchers, as these compounds are responsible for the important varietal aromas in wine, characterized by a complex floral and fruity smell, and are likely present in all grape varieties. However, the single-nucleotide polymorphism (SNP) loci and candidate genes genetically controlling the norisoprenoid content in grape berry remain unknown. To this end, in this study, we investigated 13 norisoprenoid traits across two years in an F1 population consisting of 149 individuals from a hybrid of Vitis vinifera L. cv. Muscat Alexandria and V. vinifera L. cv. Christmas Rose. Based on 568,953 SNP markers, genome-wide association analysis revealed that 27 candidate SNP loci belonging to 18 genes were significantly associated with the concentrations of norisoprenoid components in grape berry. Among them, 13 SNPs were confirmed in a grapevine germplasm population comprising 97 varieties, including two non-synonymous mutations SNPs within the VvDXS1 and VvGGPPS genes, respectively in the isoprenoid metabolic pathway. Genotype analysis showed that the grapevine individuals with the heterozygous genotype C/T at chr5:2987350 of VvGGPPS accumulated higher average levels of 6-methyl-5-hepten-2-one and β-cyclocitral than those with the homozygous genotype C/C. Furthermore, VvGGPPS was highly expressed in individuals with high norisoprenoids concentrations. Transient overexpression of VvGGPPS in the leaves of Vitis quinquangularis and tobacco resulted in an increase in norisoprenoid concentrations. These findings indicate the importance of VvGGPPS in the genetic control of norisoprenoids in grape berries, serving as a potential molecular breeding target for aroma.
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Affiliation(s)
- Qi Sun
- Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Lei He
- Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Lei Sun
- Beijing Academy of Forestry and Pomology Sciences, Beijing, China
| | - Hai-Ying Xu
- Beijing Academy of Forestry and Pomology Sciences, Beijing, China
| | - Ya-Qun Fu
- Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Zheng-Yang Sun
- Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Bao-Qing Zhu
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
| | - Chang-Qing Duan
- Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Qiu-Hong Pan
- Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, China
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Effect of Developmental Stages on Genes Involved in Middle and Downstream Pathway of Volatile Terpene Biosynthesis in Rose Petals. Genes (Basel) 2022; 13:genes13071177. [PMID: 35885960 PMCID: PMC9320630 DOI: 10.3390/genes13071177] [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: 05/08/2022] [Revised: 06/22/2022] [Accepted: 06/23/2022] [Indexed: 11/16/2022] Open
Abstract
Terpenoids are economically and ecologically important compounds, and they are vital constituents in rose flower fragrance and rose essential oil. The terpene synthase genes (TPSs), trans-prenyltransferases genes (TPTs), NUDX1 are involved in middle and downstream pathway of volatile terpene biosynthesis in rose flowers. We identified 7 complete RcTPTs, 49 complete RcTPSs, and 9 RcNUDX1 genes in the genome of Rosachinensis. During the flower opening process of butterfly rose (Rosachinensis ‘Mutabilis’, MU), nine RcTPSs expressed in the petals of opening MU flowers exhibited two main expression trends, namely high and low, in old and fresh petals. Five short-chain petal-expressed RcTPTs showed expression patterns corresponding to RcTPSs. Analysis of differential volatile terpenes and differential expressed genes indicated that higher emission of geraniol from old MU petals might be related to the RcGPPS expression. Comprehensive analysis of volatile emission, sequence structure, micro-synteny and gene expression suggested that RcTPS18 may encode (E,E)-α-farnesene synthase. These findings may be useful for elucidating the molecular mechanism of terpenoid metabolism in rose and are vital for future studies on terpene regulation.
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Plant geranylgeranyl diphosphate synthases: every (gene) family has a story. ABIOTECH 2021; 2:289-298. [PMID: 36303884 PMCID: PMC9590577 DOI: 10.1007/s42994-021-00050-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/18/2021] [Indexed: 12/20/2022]
Abstract
Plant isoprenoids (also known as terpenes or terpenoids) are a wide family of primary and secondary metabolites with multiple functions. In particular, most photosynthesis-related isoprenoids (including carotenoids and chlorophylls) as well as diterpenes and polyterpenes derive from geranylgeranyl diphosphate (GGPP) produced by GGPP synthase (GGPPS) enzymes in several cell compartments. Plant genomes typically harbor multiple copies of differentially expressed genes encoding GGPPS-like proteins. While sequence comparisons allow to identify potential GGPPS candidates, experimental evidence is required to ascertain their enzymatic activity and biological function. Actually, functional analyses of the full set of potential GGPPS paralogs are only available for a handful of plant species. Here we review our current knowledge on the GGPPS families of the model plant Arabidopsis thaliana and the crop species rice (Oryza sativa), pepper (Capsicum annuum) and tomato (Solanum lycopersicum). The results indicate that a major determinant of the biological role of particular GGPPS paralogs is the expression profile of the corresponding genes even though specific interactions with other proteins (including GGPP-consuming enzymes) might also contribute to subfunctionalization. In some species, however, a single GGPPS isoforms appears to be responsible for the production of most if not all GGPP required for cell functions. Deciphering the mechanisms regulating GGPPS activity in particular cell compartments, tissues, organs and plant species will be very useful for future metabolic engineering approaches aimed to manipulate the accumulation of particular GGPP-derived products of interest without negatively impacting the levels of other isoprenoids required to sustain essential cell functions.
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