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Xu DB, Ma YN, Qin TF, Tang WL, Qi XW, Wang X, Liu RC, Fang HL, Chen ZQ, Liang CY, Wu W. Transcriptome-Wide Identification and Characterization of the JAZ Gene Family in Mentha canadensis L. Int J Mol Sci 2021; 22:ijms22168859. [PMID: 34445565 PMCID: PMC8396335 DOI: 10.3390/ijms22168859] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/09/2021] [Accepted: 08/12/2021] [Indexed: 12/20/2022] Open
Abstract
Jasmonate ZIM-domain (JAZ) proteins are the crucial transcriptional repressors in the jasmonic acid (JA) signaling process, and they play pervasive roles in plant development, defense, and plant specialized metabolism. Although numerous JAZ gene families have been discovered across several plants, our knowledge about the JAZ gene family remains limited in the economically and medicinally important Chinese herb Mentha canadensis L. Here, seven non-redundant JAZ genes named McJAZ1–McJAZ7 were identified from our reported M. canadensis transcriptome data. Structural, amino acid composition, and phylogenetic analysis showed that seven McJAZ proteins contained the typical zinc-finger inflorescence meristem (ZIM) domain and JA-associated (Jas) domain as conserved as those in other plants, and they were clustered into four groups (A-D) and distributed into five subgroups (A1, A2, B1, B2, and D). Quantitative real-time PCR (qRT-PCR) analysis showed that seven McJAZ genes displayed differential expression patterns in M. canadensis tissues, and preferentially expressed in flowers. Furthermore, the McJAZ genes expression was differentially induced after Methyl jasmonate (MeJA) treatment, and their transcripts were variable and up- or down-regulated under abscisic acid (ABA), drought, and salt treatments. Subcellular localization analysis revealed that McJAZ proteins are localized in the nucleus or cytoplasm. Yeast two-hybrid (Y2H) assays demonstrated that McJAZ1-5 interacted with McCOI1a, a homolog of Arabidopsis JA receptor AtCOI1, in a coronatine-dependent manner, and most of McJAZ proteins could also form homo- or heterodimers. This present study provides valuable basis for functional analysis and exploitation of the potential candidate McJAZ genes for developing efficient strategies for genetic improvement of M. canadensis.
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Affiliation(s)
- Dong-Bei Xu
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (W.-L.T.); (X.W.); (R.-C.L.)
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), No. 1 Qianhu Houcun, Zhongshanmen Wai, Nanjing 210014, China; (Y.-N.M.); (X.-W.Q.); (H.-L.F.); (Z.-Q.C.)
- Correspondence: (D.-B.X.); (C.-Y.L.); (W.W.)
| | - Ya-Nan Ma
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), No. 1 Qianhu Houcun, Zhongshanmen Wai, Nanjing 210014, China; (Y.-N.M.); (X.-W.Q.); (H.-L.F.); (Z.-Q.C.)
| | - Teng-Fei Qin
- Henan Collaborative Innovation Center of Modern Biological Breeding, Henan Institute of Sciences and Technology, Xinxiang 453003, China;
| | - Wei-Lin Tang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (W.-L.T.); (X.W.); (R.-C.L.)
| | - Xi-Wu Qi
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), No. 1 Qianhu Houcun, Zhongshanmen Wai, Nanjing 210014, China; (Y.-N.M.); (X.-W.Q.); (H.-L.F.); (Z.-Q.C.)
| | - Xia Wang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (W.-L.T.); (X.W.); (R.-C.L.)
| | - Rui-Cen Liu
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (W.-L.T.); (X.W.); (R.-C.L.)
| | - Hai-Ling Fang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), No. 1 Qianhu Houcun, Zhongshanmen Wai, Nanjing 210014, China; (Y.-N.M.); (X.-W.Q.); (H.-L.F.); (Z.-Q.C.)
| | - Ze-Qun Chen
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), No. 1 Qianhu Houcun, Zhongshanmen Wai, Nanjing 210014, China; (Y.-N.M.); (X.-W.Q.); (H.-L.F.); (Z.-Q.C.)
| | - Cheng-Yuan Liang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), No. 1 Qianhu Houcun, Zhongshanmen Wai, Nanjing 210014, China; (Y.-N.M.); (X.-W.Q.); (H.-L.F.); (Z.-Q.C.)
- Correspondence: (D.-B.X.); (C.-Y.L.); (W.W.)
| | - Wei Wu
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (W.-L.T.); (X.W.); (R.-C.L.)
- Correspondence: (D.-B.X.); (C.-Y.L.); (W.W.)
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Zheng CK, Wang CL, Zhang XP, Wang FJ, Qin TF, Zhao KJ. The last half-repeat of transcription activator-like effector (TALE) is dispensable and thereby TALE-based technology can be simplified. Mol Plant Pathol 2014; 15:690-7. [PMID: 24521457 PMCID: PMC6638880 DOI: 10.1111/mpp.12125] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
To activate the expression of host genes that contribute to pathogen growth, pathogenic Xanthomonas bacteria inject their transcription activator-like effectors (TALEs) into plant cells and the TALEs bind to target gene promoters by the central repeat region consisting of near-perfect 34-amino-acid repeats (34-aa repeats). Based on the recognition codes between the 34-aa repeats and the targeted nucleotides, TALE-based technologies, such as designer TALEs (dTALEs) and TALE nucleases (TALENs), have been developed. Amazingly, every natural TALE invariantly has a truncated last half-repeat (LHR) at the end of the 34-aa repeats. Consequently, all the reported dTALEs and TALENs also harbour their LHRs. Here, we show that the LHRs in dTALEs are dispensable for the function of gene activation by both transient expression assays in Nicotiana benthamiana and gene-specific targeting in the rice genome, indicating that TALEs might originate from a single progenitor. In the light of this finding, we demonstrate that dTALEs can be constructed through two simple steps. Moreover, the activation strengths of dTALEs lacking the LHR are comparable with those of dTALEs harbouring the LHR. Our results provide new insights into the origin of natural TALEs, and will facilitate the simplification of the design and assembly of TALE-based tools, such as dTALEs and TALENs, in the near future.
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Affiliation(s)
- Chong-Ke Zheng
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Key Laboratory of Crop Genetics and Breeding, Ministry of Agriculture, Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, China
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Wang CL, Qin TF, Yu HM, Zhang XP, Che JY, Gao Y, Zheng CK, Yang B, Zhao KJ. The broad bacterial blight resistance of rice line CBB23 is triggered by a novel transcription activator-like (TAL) effector of Xanthomonas oryzae pv. oryzae. Mol Plant Pathol 2014; 15:333-41. [PMID: 24286630 PMCID: PMC6638860 DOI: 10.1111/mpp.12092] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Bacterial blight (BB), caused by Xanthomonas oryzae pv. oryzae (Xoo), is not only a disease devastating rice production worldwide, but also an ideal model system for the study of the interaction between plants and their bacterial pathogens. The rice near-isogenic line (NIL) CBB23, derived from a cross between a wild rice Oryza rufipogon accession (RBB16) and a susceptible indica rice variety (Jingang 30), is highly resistant to all field Xoo strains tested so far. Although the BB resistance of CBB23 has been widely used in rice breeding programmes, the mechanism of its extremely broad-spectrum resistance remains unknown. Here, we report the molecular cloning of an avirulence gene, designated as avrXa23, from Xoo strain PXO99(A) . We validate that AvrXa23, a novel transcription activator-like effector, specifically triggers the broad-spectrum BB resistance in CBB23. The prevalence of avrXa23 in all 38 Xoo strains surveyed may explain the broad-spectrum feature of BB resistance in CBB23. The results will significantly facilitate the molecular cloning of the corresponding resistance (R) gene in the host, and provide new insights into our understanding of the molecular mechanism for broad-spectrum disease resistance in plants.
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Affiliation(s)
- Chun-Lian Wang
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, China; Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, 50011, USA
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