1
|
Genetic transfection, hairy root induction and solasodine accumulation in elicited hairy root clone of Solanum erianthum D. Don. J Biotechnol 2020; 323:238-245. [PMID: 32896528 DOI: 10.1016/j.jbiotec.2020.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/22/2020] [Accepted: 09/01/2020] [Indexed: 11/22/2022]
Abstract
An efficient genetic transfection technique has been established using A4 strain of Agrobacterium rhizogenes for the first time in a medicinally valuable plant Solanum erianthum D. Don. The explants were randomly pricked with sterile needle, inoculated with bacterial suspension. The infected leaves were then washed and transferred to MS basal medium fortified with cefotaxime for hairy root induction. A maximum transformation efficiency of 72 % has been recorded after two days of co-cultivation period. The transfer of rolA and rolB genes from the bacterium to the plant genome has been confirmed in five transformed hairy rootlines by standard Polymerase Chain Reaction technique. On the basis of growth analysis and secondary metabolite study two potential rhizoclones (A4-HR-A and A4-HR-B) were selected. Rhizoclone A4-HR-A can produce highest amount of alkaloid, phenolic and flavonoid, whereas A4-HR-B was observed to be highest tannin producer. Alkaloid like solasodine, commercially important for steroidal drug synthesis, was quantified from leaf and A4-HR-A clone by an improved High Performance Liquid Chromatography method. This showed a sustainable increase (1.33 fold) in production of solasodine in hairy rootline.
Collapse
|
2
|
|
3
|
Kwon T. Mitochondrial Porin Isoform AtVDAC1 Regulates the Competence of Arabidopsis thaliana to Agrobacterium-Mediated Genetic Transformation. Mol Cells 2016; 39:705-13. [PMID: 27643450 PMCID: PMC5050536 DOI: 10.14348/molcells.2016.0159] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/08/2016] [Accepted: 08/11/2016] [Indexed: 11/27/2022] Open
Abstract
The efficiency of Agrobacterium-mediated transformation in plants depends on the virulence of Agrobacterium strains, the plant tissue culture conditions, and the susceptibility of host plants. Understanding the molecular interactions between Agrobacterium and host plant cells is crucial when manipulating the susceptibility of recalcitrant crop plants and protecting orchard trees from crown gall disease. It was discovered that Arabidopsis voltage-dependent anion channel 1 (atvdac1) mutant has drastic effects on Agrobacterium-mediated tumorigenesis and growth developmental phenotypes, and that these effects are dependent on a Ws-0 genetic background. Genetic complementation of Arabidopsis vdac1 mutants and yeast porin1-deficient strain with members of the AtVDAC gene family revealed that AtVDAC1 is required for Agrobacterium-mediated transformation, and there is weak functional redundancy between AtVDAC1 and AtVDAC3, which is independent of porin activity. Furthermore, atvdac1 mutants were deficient in transient and stable transformation by Agrobacterium, suggesting that AtVDAC1 is involved in the early stages of Agrobacterium infection prior to transferred-DNA (T-DNA) integration. Transgenic plants overexpressing AtVDAC1 not only complemented the phenotypes of the atvdac1 mutant, but also showed high efficiency of transient T-DNA gene expression; however, the efficiency of stable transformation was not affected. Moreover, the effect of phytohormone treatment on competence to Agrobacterium was compromised in atvdac1 mutants. These data indicate that AtVDAC1 regulates the competence of Arabidopsis to Agrobacterium infection.
Collapse
Affiliation(s)
- Tackmin Kwon
- Institute of Agricultural Life Sciences, Dong-A University, Busan 49315,
Korea
| |
Collapse
|
4
|
Induction of transgenic hairy roots in Trigonella foenum-graceum co-cultivated with Agrobacterium rhizogenes harboring a GFP gene. ACTA ACUST UNITED AC 2014. [DOI: 10.1007/s12892-013-0082-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
5
|
Rao K, Chodisetti B, Mangamoori LN, Giri A. Agrobacterium-Mediated Transformation in Alpinia galanga (Linn.) Willd. for Enhanced Acetoxychavicol Acetate Production. Appl Biochem Biotechnol 2012; 168:339-47. [DOI: 10.1007/s12010-012-9777-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Accepted: 06/10/2012] [Indexed: 12/23/2022]
|
6
|
Duclercq J, Sangwan-Norreel B, Catterou M, Sangwan RS. De novo shoot organogenesis: from art to science. TRENDS IN PLANT SCIENCE 2011; 16:597-606. [PMID: 21907610 DOI: 10.1016/j.tplants.2011.08.004] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2010] [Revised: 06/26/2011] [Accepted: 08/16/2011] [Indexed: 05/18/2023]
Abstract
In vitro shoot organogenesis and plant regeneration are crucial for both plant biotechnology and the fundamental study of plant biology. Although the importance of auxin and cytokinin has been known for more than six decades, the underlying molecular mechanisms of their function have only been revealed recently. Advances in identifying new Arabidopsis genes, implementing live-imaging tools and understanding cellular and molecular networks regulating de novo shoot organogenesis have helped to redefine the empirical models of shoot organogenesis and plant regeneration. Here, we review the functions and interactions of genes that control key steps in two distinct developmental processes: de novo shoot organogenesis and lateral root formation.
Collapse
Affiliation(s)
- Jérôme Duclercq
- Université de Picardie Jules Verne, Unité de Recherche EA3900-Laboratoire Androgenèse et Biotechnologie, Faculté des Sciences, 33 Rue Saint-Leu, 80039 Amiens, France
| | | | | | | |
Collapse
|
7
|
Sun SB, Meng LS, Sun XD, Feng ZH. Using high competent shoot apical meristems of cockscomb as explants for studying function of ASYMMETRIC LEAVES2-LIKE11 (ASL11) gene of Arabidopsis. Mol Biol Rep 2010; 37:3973-82. [DOI: 10.1007/s11033-010-0056-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2009] [Accepted: 03/05/2010] [Indexed: 11/24/2022]
|
8
|
Barth S, Geier T, Eimert K, Watillon B, Sangwan RS, Gleissberg S. KNOX overexpression in transgenic Kohleria (Gesneriaceae) prolongs the activity of proximal leaf blastozones and drastically alters segment fate. PLANTA 2009; 230:1081-91. [PMID: 19685246 DOI: 10.1007/s00425-009-0997-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Accepted: 07/21/2009] [Indexed: 05/11/2023]
Abstract
KNOX (knotted1-like homeobox) genes have a widely conserved role in the generation of dissected leaves. Ectopic KNOX activity in leaves in various angiosperm lineages causes leaf form changes that can elucidate how the configuration of leaf development evolved. We present an analysis of leaf morphology and morphogenesis in transgenic Kohleria lines overexpressing a heterologous KNOX gene. Kohleria, like many members of Gesneriaceae, has simple-serrated leaves with pinnate venation. KNOX overexpression causes prolonged segment proliferation in proximal, but not distal, parts of leaf blades. Elaborate dissected segments reiterate the zonation of the whole leaf, with organogenic activity persisting between a distal maturation zone and a proximal intercalary elongation zone. The architecture of vascular bundles is severely altered, with a reduced midvein and a more palmate venation. The initial establishment of organogenically competent primordial margins (marginal blastozones) and the onset of tissue differentiation in early stages of leaf development were similar in wild-type and KNOX overexpressing lines. However, leaves overexpressing KNOX often failed to fully mature, and persistent marginal blastozones were found at the base of blades in mature portions of the shoot. We conclude that KNOX-mediated perpetuation of marginal blastozones in Kohleria is sufficient to induce a set of processes that result in highly dissected leaflets, which are unusual in this plant family. Spatial confinement of blastozones between an early maturing tip and a late elongating petiole zone reflects the presence of distinct maturation processes that limit the ability of the leaf margins to respond to ectopic KNOX gene expression.
Collapse
Affiliation(s)
- Sina Barth
- Institut fuer Spezielle Botanik, University of Mainz, Mainz, Germany
| | | | | | | | | | | |
Collapse
|
9
|
Jian B, Hou W, Wu C, Liu B, Liu W, Song S, Bi Y, Han T. Agrobacterium rhizogenes-mediated transformation of Superroot-derived Lotus corniculatus plants: a valuable tool for functional genomics. BMC PLANT BIOLOGY 2009; 9:78. [PMID: 19555486 PMCID: PMC2708162 DOI: 10.1186/1471-2229-9-78] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2008] [Accepted: 06/25/2009] [Indexed: 05/20/2023]
Abstract
BACKGROUND Transgenic approaches provide a powerful tool for gene function investigations in plants. However, some legumes are still recalcitrant to current transformation technologies, limiting the extent to which functional genomic studies can be performed on. Superroot of Lotus corniculatus is a continuous root cloning system allowing direct somatic embryogenesis and mass regeneration of plants. Recently, a technique to obtain transgenic L. corniculatus plants from Superroot-derived leaves through A. tumefaciens-mediated transformation was described. However, transformation efficiency was low and it took about six months from gene transfer to PCR identification. RESULTS In the present study, we developed an A. rhizogenes-mediated transformation of Superroot-derived L. corniculatus for gene function investigation, combining the efficient A. rhizogenes-mediated transformation and the rapid regeneration system of Superroot. The transformation system using A. rhizogenes K599 harbouring pGFPGUSPlus was improved by validating some parameters which may influence the transformation frequency. Using stem sections with one node as explants, a 2-day pre-culture of explants, infection with K599 at OD(600) = 0.6, and co-cultivation on medium (pH 5.4) at 22 degrees C for 2 days enhanced the transformation frequency significantly. As proof of concept, Superroot-derived L. corniculatus was transformed with a gene from wheat encoding an Na+/H+ antiporter (TaNHX2) using the described system. Transgenic Superroot plants were obtained and had increased salt tolerance, as expected from the expression of TaNHX2. CONCLUSION A rapid and efficient tool for gene function investigation in L. corniculatus was developed, combining the simplicity and high efficiency of the Superroot regeneration system and the availability of A. rhizogenes-mediated transformation. This system was improved by validating some parameters influencing the transformation frequency, which could reach 92% based on GUS detection. The combination of the highly efficient transformation and the regeneration system of Superroot provides a valuable tool for functional genomics studies in L. corniculatus.
Collapse
Affiliation(s)
- Bo Jian
- The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Sciences, The Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
- School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, PR China
- Current address: Department of Biology, Norwegian University of Science and Technology, Realfagbygget, Trondheim NO-7491, Norway
| | - Wensheng Hou
- The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Sciences, The Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Cunxiang Wu
- The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Sciences, The Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Bin Liu
- The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Sciences, The Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
- Current address: Department of Biology, Norwegian University of Science and Technology, Realfagbygget, Trondheim NO-7491, Norway
| | - Wei Liu
- The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Sciences, The Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Shikui Song
- The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Sciences, The Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Yurong Bi
- School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, PR China
| | - Tianfu Han
- The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Sciences, The Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| |
Collapse
|
10
|
Peña L, Pérez RM, Cervera M, Juárez JA, Navarro L. Early events in Agrobacterium-mediated genetic transformation of citrus explants. ANNALS OF BOTANY 2004; 94:67-74. [PMID: 15145796 PMCID: PMC4242373 DOI: 10.1093/aob/mch117] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
BACKGROUND AND AIMS Genetic transformation of plants relies on two independent but concurrent processes: integration of foreign DNA into plant cells and regeneration of whole plants from these transformed cells. Cell competence for regeneration and for transformation does not always fall into the same cell type/developmental stage, and this is one of the main causes of the so-called recalcitrance for transformation of certain plant species. In this study, a detailed examination of the first steps of morphogenesis from citrus explants after co-cultivation with Agrobacterium tumefaciens was performed, and an investigation into which cells and tissues are competent for regeneration and transformation was carried out. Moreover, the role of phytohormones in the co-cultivation medium as possible enhancers of gene transfer was also studied. METHODS A highly responsive citrus genotype and well-established culture conditions were used to perform a histological analysis of morphogenesis and cell competence for transformation after co-cultivation of citrus epicotyl segments with A. tumefaciens. In addition, the role of phytohormones as transformation enhancers was investigated by flow cytometry. KEY RESULTS It is demonstrated that cells competent for transformation are located in the newly formed callus growing from the cambial ring. Conditions conducive to further development of this callus, such as treatment of explants in a medium rich in auxins, resulted in a more pronounced formation of cambial callus and a slower shoot regeneration process, both in Agrobacterium-inoculated and non-inoculated explants. Furthermore, co- cultivation in a medium rich in auxins caused a significant increase in the rate of actively dividing cells in S-phase, the stage in which cells are more prone to integrate foreign DNA. CONCLUSIONS Use of proper co-cultivation medium and conditions led to a higher number of stably transformed cells and to an increase in the final number of regenerated transgenic plants.
Collapse
Affiliation(s)
- Leandro Peña
- Dpto. Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias, Apartado Oficial, 46113-Moncada, Valencia, Spain.
| | | | | | | | | |
Collapse
|
11
|
Yi H, Mysore KS, Gelvin SB. Expression of the Arabidopsis histone H2A-1 gene correlates with susceptibility to Agrobacterium transformation. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2002; 32:285-98. [PMID: 12410808 DOI: 10.1046/j.1365-313x.2002.01425.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Transformation of plant cells by Agrobacterium tumefaciens involves both bacterial virulence proteins and host proteins. We have previously shown that the Arabidopsis thaliana gene H2A-1 (RAT5), which encodes histone H2A-1, is involved in T-DNA integration into the plant genome. Mutation of RAT5 results in a severely decreased frequency of transformation, whereas overexpression of RAT5 enhances the transformation frequency (Mysore et al., 2000b). We show here that the expression pattern of RAT5 correlates with plant root cells most susceptible to transformation. As opposed to a cyclin-GUS fusion gene whose expression is limited to meristematic tissues, the H2A-1 gene is expressed in many non-dividing cells. Under normal circumstances, the H2A-1 gene is expressed in the elongation zone of the root, the region that is most susceptible to Agrobacterium transformation. In addition, when roots are incubated on medium containing phytohormones, a concomitant shift in H2A-1 expression and transformation susceptibility to the root base is observed. Inoculation of root segments with a transfer-competent, but not a transformation-deficient Agrobacterium strain induces H2A-1 expression. Furthermore, pre-treatment of Arabidopsis root segments with phytohormones both induces H2A-1 expression and increases the frequency of Agrobacterium transformation. Our results suggest that the expression of the H2A-1 gene is both a marker for, and a predictor of, plant cells most susceptible to Agrobacterium transformation.
Collapse
Affiliation(s)
- HoChul Yi
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907-1392, USA
| | | | | |
Collapse
|
12
|
Chateau S, Sangwan RS, Sangwan-Norreel BS. Competence of Arabidopsis thaliana genotypes and mutants for Agrobacterium tumefaciens-mediated gene transfer: role of phytohormones. JOURNAL OF EXPERIMENTAL BOTANY 2000; 51:1961-1968. [PMID: 11141170 DOI: 10.1093/jexbot/51.353.1961] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Many plant species and/or genotypes are highly recalcitrant to Agrobacterium-mediated genetic transformation, and yet little is known about this phenomenon. Using several Arabidopsis genotypes/ecotypes, the results of this study indicated that phytohormone pretreatment could overcome this recalcitrance by increasing the transformation rate in the known recalcitrant genotypes. Transient expression of a T-DNA encoded ss-glucuronidase (GUS) gene and stable kanamycin resistance were obtained for the ten Arabidopsis genotypes tested as well as for the mutant uvh1 (up to 69% of petioles with blue spots and up to 42% resistant calli). Cultivation of Arabidopsis tissues on phytohormones for 2-8 d before co-cultivation with Agrobacterium tumefaciens significantly increased transient GUS gene expression by 2-11-fold and stable T-DNA integration with petiole explants. Different Arabidopsis ecotypes revealed differences in their susceptibility to Agrobacterium-mediated transformation and in their type of reaction to pre-cultivation (three types of reactions were defined by gathering ecotypes into three groups). The Arabidopsis uvh1 mutant described as defective in a DNA repair system showed slightly lower competence to transformation than did its progenitor Colombia. This reduced transformation competence, however, could be overcome by 4-d pre-culture with phytohormones. The importance of pre-cultivation with phytohormones for genetic transformation is discussed.
Collapse
Affiliation(s)
- S Chateau
- Laboratoire Androgenèse et Biotechnologie, Université de Picardie Jules Verne, 33 rue Saint-Leu, 80039 Amiens cedex 01, France
| | | | | |
Collapse
|