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Yu S, Wang Y, Li T, Shi H, Kong D, Pang J, Wang Z, Meng H, Gao Y, Wang X, Hong Y, Zhu JK, Zhan X, Wang Z. Chromosome-scale assembly and gene editing of Solanum americanum genome reveals the basis for thermotolerance and fruit anthocyanin composition. Theor Appl Genet 2024; 137:15. [PMID: 38184817 DOI: 10.1007/s00122-023-04523-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 12/08/2023] [Indexed: 01/08/2024]
Abstract
Solanum americanum serves as a promising source of resistance genes against potato late blight and is considered as a leafy vegetable for complementary food and nutrition. The limited availability of high-quality genome assemblies and gene annotations has hindered the exploration and exploitation of stress-resistance genes in S. americanum. Here, we present a chromosome-level genome assembly of a thermotolerant S. americanum ecotype and identify a crucial heat-inducible transcription factor gene, SaHSF17, essential for heat tolerance. The CRISPR/Cas9 system-mediated knockout of SaHSF17 results in remarkably reduced thermotolerance in S. americanum, exhibiting a significant suppression of multiple HSP gene expressions under heat treatment. Furthermore, our transcriptome analysis and anthocyanin component investigation of fruits indicated that delphinidins are the major anthocyanins accumulated in the mature dark-purple fruits. The accumulation of delphinidins and other pigment components during fruit ripening in S. americanum coincides with the transcriptional regulation of key genes, particularly the F3'5'H and F3'H genes, in the anthocyanin biosynthesis pathway. By integrating existing knowledge, the development of this high-quality reference genome for S. americanum will facilitate the identification and utilization of novel abiotic and biotic stress-resistance genes for improvement of Solanaceae and other crops.
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Affiliation(s)
- Shuojun Yu
- School of Life Sciences, Anhui Agricultural University, Hefei, 230036, Anhui, China
| | - Yue Wang
- Department of Economic Plants and Biotechnology, and Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China
| | - Tingting Li
- School of Life Sciences, Anhui Agricultural University, Hefei, 230036, Anhui, China
| | - Huazhong Shi
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409, USA
| | - Dali Kong
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Jia Pang
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Zhiqiang Wang
- School of Life Sciences, Anhui Agricultural University, Hefei, 230036, Anhui, China
| | - Huiying Meng
- School of Life Sciences, Anhui Agricultural University, Hefei, 230036, Anhui, China
| | - Yang Gao
- School of Life Sciences, Anhui Agricultural University, Hefei, 230036, Anhui, China
| | - Xu Wang
- School of Life Sciences, Anhui Agricultural University, Hefei, 230036, Anhui, China
| | - Yechun Hong
- Institute of Advanced Biotechnology and School of Life Sciences, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jian-Kang Zhu
- Institute of Advanced Biotechnology and School of Life Sciences, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xiangqiang Zhan
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Zhen Wang
- School of Life Sciences, Anhui Agricultural University, Hefei, 230036, Anhui, China.
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