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Tan M, Liu F, Xie Y, Mo Q, Shi F. The construction of an Agrobacterium-mediated transformation system of Gynostemma pentaphyllum using the phosphomannose-isomerase/mannose selection system. Plant Biotechnol (Tokyo) 2023; 40:167-174. [PMID: 38250295 PMCID: PMC10797527 DOI: 10.5511/plantbiotechnology.23.0418a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 04/18/2023] [Indexed: 01/23/2024]
Abstract
In this study, the transformed system mediated by Agrobacterium tumefaciens of Gynostemma pentaphyllum was constructed by using the phosphomannose-isomerase (PMI) gene as a marker. To investigate the cefotaxime sodium salt (Cef) concentration of bacteriostatic medium and the appropriate mannose concentration in the selectable medium, explants of the stems with buds were cultured in a basic medium supplemented with different Cef and mannose concentrations, respectively. After these were optimized, 288 explants were transformed according the protocol described above to verify their availability by using the polymerase chain reaction (PCR), reverse transcription-PCR and chlorophenol red. The results showed that the appropriate Cef concentration for bacteriostatic culture and mannose concentration for selectable culture were 150 mg l-1 and 3 g l-1 for stem with buds, respectively. According to the PCR results, the transformation frequency of stems with buds was 20.49% with a regeneration rate of 29.16%. In future, the CPR assay could be the auxiliary method of choice as it is moderately accurate, but it has good maneuverability and is cost effective for large-scale use.
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Affiliation(s)
- Muxiu Tan
- Guangxi Botanical Garden of Medicinal Plants, 189 Changgang Road, Nanning 530023, Guangxi Zhuang Autonomous Region, China
| | - Fengming Liu
- Guangxi Botanical Garden of Medicinal Plants, 189 Changgang Road, Nanning 530023, Guangxi Zhuang Autonomous Region, China
| | - Yueying Xie
- Guangxi Botanical Garden of Medicinal Plants, 189 Changgang Road, Nanning 530023, Guangxi Zhuang Autonomous Region, China
| | - Qiaocheng Mo
- Guangxi Botanical Garden of Medicinal Plants, 189 Changgang Road, Nanning 530023, Guangxi Zhuang Autonomous Region, China
| | - Fenghua Shi
- Guangxi Botanical Garden of Medicinal Plants, 189 Changgang Road, Nanning 530023, Guangxi Zhuang Autonomous Region, China
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Ren H, Xu Y, Zhao X, Zhang Y, Hussain J, Cui F, Qi G, Liu S. Optimization of Tissue Culturing and Genetic Transformation Protocol for Casuarina equisetifolia. Front Plant Sci 2022; 12:784566. [PMID: 35126414 PMCID: PMC8814579 DOI: 10.3389/fpls.2021.784566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/02/2021] [Indexed: 06/14/2023]
Abstract
Casuarina equisetifolia is widely used in agroforestry plantations for soil stabilization, ecosystem rehabilitation, reclamation, and coastal protection. Moreover, C. equisetifolia has remarkable resistance to typhoons, desert, low soil fertility, drought, and salinity, but not cold. Therefore, it is significant to breed high-quality Casuarina varieties to improve the tolerance and adaptability to cold weather by molecular techniques. The establishment of a rapid and efficient callus induction and regeneration system via tissue culture is pre-requisite for the genetic transformation of C. equisetifolia, which is so far lacking. In this study, we reported an efficient and rapid regeneration system using stem segment explants, in which callus induction was found to be optimal in a basal medium supplemented with 0.1 mg⋅L-1 TDZ and 0.1 mg⋅L-1 NAA, and proliferation in a basal medium containing 0.1 mg⋅L-1 TDZ and 0.5 mg⋅L-1 6-BA. For bud regeneration and rooting, the preferred plant growth regulator (PGR) in basal medium was 0.5 mg⋅L-1 6-BA, and a combination of 0.02 mg⋅L-1 IBA and 0.4 mg⋅L-1 IAA, respectively. We also optimized genetic a transformation protocol using Agrobacterium tumefaciens harboring the binary vector pCAMBIA1301 with β-glucuronidase (GUS) as a reporter gene. Consequently, 5 mg L-1 hygromycin, 20 mg L-1 acetosyringone (As), and 2 days of co-cultivation duration were optimized to improve the transformation efficiency. With these optimized parameters, transgenic plants were obtained in about 4 months. Besides that, Agrobacterium rhizogenes-mediated transformation involving adventitious root induction was also optimized. Our findings will not only increase the transformation efficiency but also shorten the time for developing transgenic C. equisetifolia plants. Taken together, this pioneer study on tissue culturing and genetic transformation of C. equisetifolia will pave the way for further genetic manipulation and functional genomics of C. equisetifolia.
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Affiliation(s)
- Huimin Ren
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Yan Xu
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Xiaohong Zhao
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Yan Zhang
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Jamshaid Hussain
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Fuqiang Cui
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Guoning Qi
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Shenkui Liu
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
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Yang Z, Mu Y, Wang Y, He F, Shi L, Fang Z, Zhang J, Zhang Q, Geng G, Zhang S. Characterization of a Novel TtLEA2 Gene From Tritipyrum and Its Transformation in Wheat to Enhance Salt Tolerance. Front Plant Sci 2022; 13:830848. [PMID: 35444677 PMCID: PMC9014267 DOI: 10.3389/fpls.2022.830848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 02/11/2022] [Indexed: 05/12/2023]
Abstract
Late embryogenesis-abundant (LEA) proteins are critical in helping plants cope with salt stress. "Y1805" is a salt-tolerant Tritipyrum. We identified a "Y1805"-specific LEA gene that was expressed highly and sensitively under salt stress using transcriptome analysis. The novel group 2 LEA gene (TtLEA2-1) was cloned from "Y1805." TtLEA2-1 contained a 453 bp open reading frame encoding an 151-amino-acid protein that showed maximum sequence identity (77.00%) with Thinopyrum elongatum by phylogenetic analysis. It was mainly found to be expressed highly in the roots by qRT-PCR analysis and was located in the whole cell. Forty-eight candidate proteins believed to interact with TtLEA2-1 were confirmed by yeast two-hybrid analysis. These interacting proteins were mainly enriched in "environmental information processing," "glycan biosynthesis and metabolism," and "carbohydrate metabolism." Protein-protein interaction analysis indicated that the translation-related 40S ribosomal protein SA was the central node. An efficient wheat transformation system has been established. A coleoptile length of 2 cm, an Agrobacteria cell density of 0.55-0.60 OD600, and 15 KPa vacuum pressure were ideal for common wheat transformation, with an efficiency of up to 43.15%. Overexpression of TaLEA2-1 in wheat "1718" led to greater height, stronger roots, and higher catalase activity than in wild type seedlings. TaLEA2-1 conferred enhanced salt tolerance in transgenic wheat and may be a valuable gene for genetic modification in crops.
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Affiliation(s)
- Zhifen Yang
- College of Agriculture, Guizhou University, Guiyang, China
| | - Yuanhang Mu
- College of Agriculture, Guizhou University, Guiyang, China
| | - Yiqin Wang
- College of Agriculture, Guizhou University, Guiyang, China
| | - Fang He
- College of Agriculture, Guizhou University, Guiyang, China
- Guizhou Subcenter of National Wheat Improvement Center, Guiyang, China
| | - Luxi Shi
- College of Agriculture, Guizhou University, Guiyang, China
| | - Zhongming Fang
- College of Agriculture, Guizhou University, Guiyang, China
| | - Jun Zhang
- College of Agriculture, Guizhou University, Guiyang, China
| | - Qingqin Zhang
- College of Agriculture, Guizhou University, Guiyang, China
| | - Guangdong Geng
- College of Agriculture, Guizhou University, Guiyang, China
- *Correspondence: Guangdong Geng,
| | - Suqin Zhang
- College of Agriculture, Guizhou University, Guiyang, China
- Guizhou Subcenter of National Wheat Improvement Center, Guiyang, China
- Suqin Zhang,
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Movahedi A, Zhang J, Amirian R, Zhuge Q. An efficient Agrobacterium-mediated transformation system for poplar. Int J Mol Sci 2014; 15:10780-93. [PMID: 24933641 PMCID: PMC4100180 DOI: 10.3390/ijms150610780] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [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: 03/01/2014] [Revised: 06/03/2014] [Accepted: 06/04/2014] [Indexed: 11/17/2022] Open
Abstract
Poplar is a model system for the regeneration and genetic transformation of woody plants. To shorten the time required for studies of transgenic poplar, efforts have been made to optimize transformation methods that use Agrobacterium tumefaciens. In this study, an Agrobacterium infective suspension was treated at 4 °C for at least 10 h before infecting explants. By transforming the Populus hybrid clone "Nanlin895" (Populus deltoides×P. euramericana) with Agrobacterium harboring the PBI121:CarNAC6 binary vector, we showed that the transformation efficiency was improved significantly by multiple independent factors, including an Agrobacterium infective suspension with an OD600 of 0.7, an Agrobacterium infection for 120 min, an Agrobacterium infective suspension at a pH of 5.0, an acetosyringone concentration of 200 µM, a cocultivation at 28 °C, a cocultivation for 72 h and a sucrose concentration of 30 g/L in the cocultivation medium. We also showed that preculture of wounded leaf explants for two days increased the regeneration rate. The integration of the desired gene into transgenic poplars was detected using selective medium containing kanamycin, followed by southern blot analysis. The expression of the transgene in the transgenic lines was confirmed by northern blot analysis.
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Affiliation(s)
- Ali Movahedi
- The Cooperative Innovation Center of Southern Modern Forestry, Nanjing Forestry University, Nanjing 210037, China.
| | - Jiaxin Zhang
- The Cooperative Innovation Center of Southern Modern Forestry, Nanjing Forestry University, Nanjing 210037, China.
| | - Rasoul Amirian
- Department of Genomics, Agricultural Biotechnology Research Institute, Central Region of Iran (ABRICI), Najafabad Road, Isfahan 85135-487, Iran.
| | - Qiang Zhuge
- The Cooperative Innovation Center of Southern Modern Forestry, Nanjing Forestry University, Nanjing 210037, China.
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Obando Montoya EJ, Mélin C, Blanc N, Lanoue A, Foureau E, Boudesocque L, Prie G, Simkin AJ, Crèche J, Atehortùa L, Giglioli-Guivarc'h N, Clastre M, Courdavault V, Papon N. Disrupting the methionine biosynthetic pathway in Candida guilliermondii: characterization of the MET2 gene as counter-selectable marker. Yeast 2014; 31:243-51. [PMID: 24700391 DOI: 10.1002/yea.3012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 03/25/2014] [Accepted: 03/27/2014] [Indexed: 12/20/2022] Open
Abstract
Candida guilliermondii (teleomorph Meyerozyma guilliermondii) is an ascomycetous species belonging to the fungal CTG clade. This yeast remains actively studied as a result of its moderate clinical importance and most of all for its potential uses in biotechnology. The aim of the present study was to establish a convenient transformation system for C. guilliermondii by developing both a methionine auxotroph recipient strain and a functional MET gene as selection marker. We first disrupted the MET2 and MET15 genes encoding homoserine-O-acetyltransferase and O-acetylserine O-acetylhomoserine sulphydrylase, respectively. The met2 mutant was shown to be a methionine auxotroph in contrast to met15 which was not. Interestingly, met2 and met15 mutants formed brown colonies when cultured on lead-containing medium, contrary to the wild-type strain, which develop as white colonies on this medium. The MET2 wild-type allele was successfully used to transfer a yellow fluorescent protein (YFP) gene-expressing vector into the met2 recipient strain. In addition, we showed that the loss of the MET2-containing YFP-expressing plasmid can be easily observed on lead-containing medium. The MET2 wild-type allele, flanked by two short repeated sequences, was then used to disrupt the LYS2 gene (encoding the α-aminoadipate reductase) in the C. guilliermondii met2 recipient strain. The resulting lys2 mutants displayed, as expected, auxotrophy for lysine. Unfortunately, all our attempts to pop-out the MET2 marker (following the recombination of the bordering repeat sequences) from a target lys2 locus were unsuccessful using white/brown colony colour screening. Nevertheless, this MET2 transformation/disruption system represents a new versatile genetic tool for C. guilliermondii.
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Affiliation(s)
- Erika J Obando Montoya
- Université François-Rabelais de Tours, EA2106, Biomolécules et Biotechnologies Végétales, Tours, France; Universidad de Antioquia, Laboratorio de Biotecnología, Sede de Investigación Universitaria, Colombia
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