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Li X, Ping A, Qi X, Li M, Hou L. Cloning, expression and functional analysis of the SOC1 homologous gene in pak choi ( Brassica rapa ssp. Chinensis makino). BIOTECHNOL BIOTEC EQ 2022. [DOI: 10.1080/13102818.2022.2134823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Xuan Li
- Department of Vegetable, College of Horticulture, Shanxi Agricultural University (Shanxi Academy of Agricultural Sciences), Taigu, P.R. China
| | - Amin Ping
- Department of Vegetable, College of Horticulture, Shanxi Agricultural University (Shanxi Academy of Agricultural Sciences), Taigu, P.R. China
| | - Xianhui Qi
- Department of Vegetable, College of Horticulture, Shanxi Agricultural University (Shanxi Academy of Agricultural Sciences), Taigu, P.R. China
| | - Meilan Li
- Department of Vegetable, College of Horticulture, Shanxi Agricultural University (Shanxi Academy of Agricultural Sciences), Taigu, P.R. China
| | - Leiping Hou
- Department of Vegetable, College of Horticulture, Shanxi Agricultural University (Shanxi Academy of Agricultural Sciences), Taigu, P.R. China
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CRISPR/Cas9-Mediated Mutagenesis of BrLEAFY Delays the Bolting Time in Chinese Cabbage ( Brassica rapa L. ssp. pekinensis). Int J Mol Sci 2022; 24:ijms24010541. [PMID: 36613993 PMCID: PMC9820718 DOI: 10.3390/ijms24010541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 12/20/2022] [Accepted: 12/26/2022] [Indexed: 12/31/2022] Open
Abstract
Chinese cabbage has unintended bolting in early spring due to sudden climate change. In this study, late-bolting Chinese cabbage lines were developed via mutagenesis of the BrLEAFY (BrLFY) gene, a transcription factor that determines floral identity, using the clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated protein 9 (CRISPR/Cas9) system. Double-strand break of the target region via gene editing based on nonhomologous end joining (NHEJ) was applied to acquire useful traits in plants. Based on the 'CT001' pseudomolecule, a single guide RNA (sgRNA) was designed and the gene-editing vector was constructed. Agrobacterium-mediated transformation was used to generate a Chinese cabbage line in which the sequence of the BrLFY paralogs was edited. In particular, single base inserted mutations occurred in the BrLFY paralogs of the LFY-7 and LFY-13 lines, and one copy of T-DNA was inserted into the intergenic region. The selected LFY-edited lines displayed continuous vegetative growth and late bolting compared to the control inbred line, 'CT001'. Further, some LFY-edited lines showing late bolting were advanced to the next generation. The T-DNA-free E1LFY-edited lines bolted later than the inbred line, 'CT001'. Overall, CRISPR/Cas9-mediated mutagenesis of the BrLFY gene was found to delay the bolting time. Accordingly, CRISPR/Cas9 is considered an available method for the molecular breeding of crops.
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Zhang J, Ping AM, Wang XT, Li GZ, Zhu ZJ, Li ML, Xing GM, Hou LP. Cloning and expression analysis of SPL8 homolog from pak choi ( Brassica rapa subsp. chinensis). BIOTECHNOL BIOTEC EQ 2017. [DOI: 10.1080/13102818.2017.1382390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Jing Zhang
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, PR China
| | - A-Min Ping
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, PR China
| | - Xue-Ting Wang
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, PR China
| | - Gai-Zhen Li
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, PR China
- Institute of Vegetable Research, Shanxi Academy of Agricultural Sciences, Taiyuan, PR China
| | - Zhu-Jun Zhu
- Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, Department of Horticulture, College of Agricultural and Food Science, Zhejiang A&F University, Hangzhou, PR China
| | - Mei-Lan Li
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, PR China
| | - Guo-Ming Xing
- Department of Vegetables, College of Horticulture, Shanxi Agricultural University, Taigu, PR China
| | - Lei-Ping Hou
- Department of Vegetables, College of Horticulture, Shanxi Agricultural University, Taigu, PR China
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Wang X, Song H, Sun M, Zhu Z, Xing G, Xu X, Gao M, Hou L, Li M. Digital gene expression analysis during floral transition in pak choi ( Brassica rapasubsp . chinensis). BIOTECHNOL BIOTEC EQ 2017. [DOI: 10.1080/13102818.2017.1307141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Xueting Wang
- College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, P. R. China
| | - Hongxia Song
- College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, P. R. China
| | - Mengxia Sun
- College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, P. R. China
| | - Zhujun Zhu
- Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Agricultural and Food Science, Zhejiang A&F University, Hangzhou, P. R. China
| | - Guoming Xing
- College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, P. R. China
| | - Xiaoyong Xu
- College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, P. R. China
| | - Meiying Gao
- College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, P. R. China
| | - Leiping Hou
- College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, P. R. China
| | - Meilan Li
- College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, P. R. China
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Dhakate P, Tyagi S, Singh A, Singh A. Functional characterization of a novel Brassica LEAFY homolog from Indian mustard: Expression pattern and gain-of-function studies. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 258:29-44. [PMID: 28330561 DOI: 10.1016/j.plantsci.2017.02.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 01/13/2017] [Accepted: 02/10/2017] [Indexed: 06/06/2023]
Abstract
LEAFY plays a central role in regulation of flowering time and floral meristem identity in plants. Unfortunately, LFY function remains uncharacterized in agronomicaly important Brassicas. Herein, we illustrate fine-mapping of expression domains of LFY in 15 cultivars of 6 Brassica species and describe gain-of-function phenotypes in Arabidopsis and Brassica. We depict early flowering and altered fatty-acid composition in transgenic seed. The cDNA encoding BjuLFY (417aa) shared only 85% identity with reported homolog of B.juncea implying distinctness. Quantitative RT-PCR based coarse expression mapping of BjuLFY in tissue samples representing 3 time points at specific days after sowing (DAS), pre-flowering (30 DAS), flowering (75 DAS) and post-flowering (110 DAS), depicted an intense pulse of BjuLFY expression restricted to primary floral buds (75 DAS) which subsided in secondary floral buds (110 DAS); expression in root samples was also recorded implying neo-functionalization. Fine-mapping of expression during flowering confirmed tightly regulated LFY expression during early stages of bud development in 15 cultivars of 6 Brassica species implying functional conservation. Ectopic expression of BjuLFY in A. thaliana and B. juncea caused floral meristem defects and precocious flowering. B. juncea transgenics (T1) over-expressing BjuLFY flowered 20days earlier produced normal flowers. GC-MS analysis of mature seed from Brassica transgenics showed an altered fatty-acid profile suggestive of seed maturation occurring at lower temperatures vis-à-vis control. Our findings implicate BjuLFY as a regulator of flowering in B. juncea and suggest its application in developing climate resilient crops.
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Affiliation(s)
- Priyanka Dhakate
- Department of Biotechnology, TERI University, 10 Institutional Area, Vasant Kunj, Delhi 110070, India
| | - Shikha Tyagi
- Department of Biotechnology, TERI University, 10 Institutional Area, Vasant Kunj, Delhi 110070, India
| | - Anupama Singh
- Department of Biotechnology, TERI University, 10 Institutional Area, Vasant Kunj, Delhi 110070, India
| | - Anandita Singh
- Department of Biotechnology, TERI University, 10 Institutional Area, Vasant Kunj, Delhi 110070, India.
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