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Hao Z, Zhang Z, Jiang J, Pan L, Zhang J, Cui X, Li Y, Li J, Luo L. Complete mitochondrial genome of Melia azedarach L., reveals two conformations generated by the repeat sequence mediated recombination. BMC PLANT BIOLOGY 2024; 24:645. [PMID: 38972991 PMCID: PMC11229266 DOI: 10.1186/s12870-024-05319-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 06/21/2024] [Indexed: 07/09/2024]
Abstract
Melia azedarach is a species of enormous value of pharmaceutical industries. Although the chloroplast genome of M. azedarach has been explored, the information of mitochondrial genome (Mt genome) remains surprisingly limited. In this study, we used a hybrid assembly strategy of BGI short-reads and Nanopore long-reads to assemble the Mt genome of M. azedarach. The Mt genome of M. azedarach is characterized by two circular chromosomes with 350,142 bp and 290,387 bp in length, respectively, which encodes 35 protein-coding genes (PCGs), 23 tRNA genes, and 3 rRNA genes. A pair of direct repeats (R1 and R2) were associated with genome recombination, resulting in two conformations based on the Sanger sequencing and Oxford Nanopore sequencing. Comparative analysis identified 19 homologous fragments between Mt and chloroplast genome, with the longest fragment of 12,142 bp. The phylogenetic analysis based on PCGs were consist with the latest classification of the Angiosperm Phylogeny Group. Notably, a total of 356 potential RNA editing sites were predicted based on 35 PCGs, and the editing events lead to the formation of the stop codon in the rps10 gene and the start codons in the nad4L and atp9 genes, which were verified by PCR amplification and Sanger sequencing. Taken together, the exploration of M. azedarach gap-free Mt genome provides a new insight into the evolution research and complex mitogenome architecture.
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Affiliation(s)
- Zhigang Hao
- Sanya Institute of China Agricultural University, Sanya, Hainan, 572025, China
- Department of Plant Pathology, Beijing Key Laboratory of Seed Disease Testing and Control, MOA Key Lab of Pest Monitoring and Green Management, China Agricultural University, Beijing, 100193, China
- Hainan Seed Industry Laboratory, Sanya, Hainan, 572025, China
| | - Zhiping Zhang
- Department of Pesticide Science, College of Plant Protection, State Key Laboratory for Conservation and Utilization of Bio-Resource in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, 650201, China
- Key Laboratory of Vegetable Biology of Yunnan Province, College of Landscape and Horticulture, Yunnan Agricultural University, Kunming, Yunnan, 650201, China
| | - Juan Jiang
- Sanya Institute of China Agricultural University, Sanya, Hainan, 572025, China
| | - Lei Pan
- CAIQ Center for Biosafety in Sanya, Sanya, Hainan, 572000, China
| | - Jinan Zhang
- Sanya Institute of China Agricultural University, Sanya, Hainan, 572025, China
- Department of Plant Pathology, Beijing Key Laboratory of Seed Disease Testing and Control, MOA Key Lab of Pest Monitoring and Green Management, China Agricultural University, Beijing, 100193, China
| | - Xiufen Cui
- Sanya Institute of China Agricultural University, Sanya, Hainan, 572025, China
- Department of Plant Pathology, Beijing Key Laboratory of Seed Disease Testing and Control, MOA Key Lab of Pest Monitoring and Green Management, China Agricultural University, Beijing, 100193, China
| | - Yingbin Li
- Department of Pesticide Science, College of Plant Protection, State Key Laboratory for Conservation and Utilization of Bio-Resource in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, 650201, China
| | - Jianqiang Li
- Sanya Institute of China Agricultural University, Sanya, Hainan, 572025, China.
- Department of Plant Pathology, Beijing Key Laboratory of Seed Disease Testing and Control, MOA Key Lab of Pest Monitoring and Green Management, China Agricultural University, Beijing, 100193, China.
| | - Laixin Luo
- Sanya Institute of China Agricultural University, Sanya, Hainan, 572025, China.
- Department of Plant Pathology, Beijing Key Laboratory of Seed Disease Testing and Control, MOA Key Lab of Pest Monitoring and Green Management, China Agricultural University, Beijing, 100193, China.
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Zhu Y, Li L. Wood of trees: Cellular structure, molecular formation, and genetic engineering. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2024; 66:443-467. [PMID: 38032010 DOI: 10.1111/jipb.13589] [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: 08/30/2023] [Accepted: 11/28/2023] [Indexed: 12/01/2023]
Abstract
Wood is an invaluable asset to human society due to its renewable nature, making it suitable for both sustainable energy production and material manufacturing. Additionally, wood derived from forest trees plays a crucial role in sequestering a significant portion of the carbon dioxide fixed during photosynthesis by terrestrial plants. Nevertheless, with the expansion of the global population and ongoing industrialization, forest coverage has been substantially decreased, resulting in significant challenges for wood production and supply. Wood production practices have changed away from natural forests toward plantation forests. Thus, understanding the underlying genetic mechanisms of wood formation is the foundation for developing high-quality, fast-growing plantation trees. Breeding ideal forest trees for wood production using genetic technologies has attracted the interest of many. Tremendous studies have been carried out in recent years on the molecular, genetic, and cell-biological mechanisms of wood formation, and considerable progress and findings have been achieved. These studies and findings indicate enormous possibilities and prospects for tree improvement. This review will outline and assess the cellular and molecular mechanisms of wood formation, as well as studies on genetically improving forest trees, and address future development prospects.
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Affiliation(s)
- Yingying Zhu
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems and College of Ecology, Lanzhou University, Lanzhou, 730000, China
| | - Laigeng Li
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
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Colbert JB, Coleman HD. Functional Diversification and the Plant Secondary Cell Wall. J Mol Evol 2023; 91:761-772. [PMID: 37979044 DOI: 10.1007/s00239-023-10145-w] [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: 05/25/2023] [Accepted: 11/09/2023] [Indexed: 11/19/2023]
Abstract
Much evidence exists suggesting the presence of genetic functional diversification in plants, though literature associated with the role of functional diversification in the evolution of the plant secondary cell wall (SCW) has sparsely been compiled and reviewed in a recent context. This review aims to elucidate, through the examination of gene phylogenies associated with its biosynthesis and maintenance, the role of functional diversification in shaping the critical, dynamic, and characteristic organelle, the secondary cell wall. It will be asserted that gene families resulting from gene duplication and subsequent functional divergence are present and are heavily involved in SCW biosynthesis and maintenance. Furthermore, diversification will be presented as a significant driver behind the evolution of the many functional characteristics of the SCW. The structure and function of the plant cell wall and its constituents will first be explored, followed by a discussion on the phenomenon of gene duplication and the resulting genetic functional divergence that can emerge. Finally, the major constituents of the SCW and their individual relationships with duplication and divergence will be reviewed to the extent of current knowledge on the subject.
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Affiliation(s)
- Joseph B Colbert
- Biology Department, Syracuse University, 107 College Place, Syracuse, NY, 13244, USA
| | - Heather D Coleman
- Biology Department, Syracuse University, 107 College Place, Syracuse, NY, 13244, USA.
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