1
|
Toward the development of Ac/Ds transposon-mediated gene tagging system for functional genomics in oat (Avena sativa L.). Funct Integr Genomics 2022; 22:669-681. [PMID: 35467221 DOI: 10.1007/s10142-022-00861-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 04/07/2022] [Accepted: 04/08/2022] [Indexed: 11/04/2022]
Abstract
Cultivated oat (Avena sativa L.) is an important cereal grown worldwide due to its multifunctional uses for animal feed and human food. Oat has lagged behind other cereals in the genetic and genomic studies attributed to its large and complex genomes. Transposon-based genome characterization has been utilized successfully for identifying and determining gene function in large genome cereals. To develop gene tagging and gene-editing resources for oat, maize Activator (Ac) and Dissociation (Ds) transposons were introduced into the oat genome using the biolistic delivery system. A total of 2035 oat calli were bombarded and twenty-four independent, stable transgenic events were obtained. Transformation frequencies were up to 19.0%, and 1.9% for bialaphos and hygromycin selection, respectively. Re-mobilization of the non-autonomous Ds element, by introducing Ac transposase source, led to a transposition frequency up to 16.8%. The properties of ten unique flanking sequences have been characterized to reveal the Ds-tagged sites in the oat genome. Genes at Ds insertion sites showed homology to gibberellin 20-oxidase 3, (1,3;1,4)-beta-D-glucan synthase, and aspartate kinase. This Ac/Ds transposon-based gene tagging system could facilitate and expedite functional genomic studies in oat.
Collapse
|
2
|
Kim SJ, Park JS, Shin YH, Park YD. Identification and Validation of Genetic Variations in Transgenic Chinese Cabbage Plants ( Brassica rapa ssp. pekinensis) by Next-Generation Sequencing. Genes (Basel) 2021; 12:genes12050621. [PMID: 33922022 PMCID: PMC8143544 DOI: 10.3390/genes12050621] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/16/2021] [Accepted: 04/19/2021] [Indexed: 01/24/2023] Open
Abstract
Transgenic plants are usually produced through tissue culture, which is an essential step in Agrobacterium-mediated plant transformation. However, genomic variations, termed somaclonal variations, have been detected in transgenic plants cultured in vitro. The occurrence of these variations should be as low as possible to secure the stability of transgenic crops. Determining the cause and mechanism of somaclonal variations in tissue culture-derived plants will help reduce the rate of variation and promote the stable expression of genes in transgenic plants. In order to determine the genetic variability in transgenic Chinese cabbage plants, we performed whole-genome resequencing and compared the sequencing data with the ‘CT001’ reference genome. The variation candidates that were expected to consistently occur in the transgenic lines were selected and validated. The single nucleotide polymorphism (SNP) and insertion and deletion (InDel) candidates were identified using the resequencing data and validated by reverse transcription (RT)-PCR analysis. The deduced amino acid sequences were used to determine whether the variations caused changes in the resulting polypeptide, and the annotations of the mutated genes were analyzed to predict the possible effects of the SNPs on gene function. In conclusion, we selected and validated the genetic variations identified in transgenic Chinese cabbage plants. Their genomes were expected to be affected by the process of Agrobacterium-mediated transformation. The findings of our study will provide a genetic basis for transgenic plant research.
Collapse
Affiliation(s)
| | | | | | - Young-Doo Park
- Correspondence: ; Tel.: +82-10-3338-9344; Fax: +82-31-202-8395
| |
Collapse
|
3
|
Rathinapriya P, Satish L, Rameshkumar R, Pandian S, Rency AS, Ramesh M. Role of activated charcoal and amino acids in developing an efficient regeneration system for foxtail millet ( Setaria italica (L.) Beauv.) using leaf base segments. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2019; 25:533-548. [PMID: 30956434 PMCID: PMC6419705 DOI: 10.1007/s12298-018-0619-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 10/14/2018] [Accepted: 10/25/2018] [Indexed: 06/01/2023]
Abstract
An efficacious, reproducible direct in vitro regeneration system has been developed from leaf base segments (LBs) of six high yielding genotypes of foxtail millet (Setaria italica (L.) Beauv.). LBs excised from 4-day-old seedling were inoculated on Murashige and Skoog (MS) medium supplemented with different types and concentrations of cytokinins. The shoots induced per explant significantly increased with the supplementation of BAP to auxin containing medium. The results showed that a maximum shoot induction, 58.8% was obtained on MS medium incorporated with 8.9 µM BAP and 2.7 µM NAA in 'CO5' genotype. Further, the highest frequency of multiple shoots was produced on MS(I) medium containing 8.9 µM BAP, 2.7 µM NAA, 700 mg L-1 proline, 0.5 mg L-1 cysteine, 2.0 mg L-1 glycine and 150 mg L-1 arginine. MS(I) medium additionally fortified with 5.0 g L-1 activated charcoal (AC) was found to achieve the best precocious plant regeneration. Elongated shoots were rooted on half-strength MS medium amended with 2.9 µM IAA and achieved maximum root number (8.7) within 10 days. Rooted plantlets were acclimated in soil with 92% survival rate. Molecular marker analysis of in vitro regenerated and field grown plants revealed no somaclonal variations. Briefly, amino acids and activated charcoal could significantly enhance the foxtail millet direct multiple shoot proliferation and plant regeneration. Here we report, a short-term, genotype independent, direct plant regeneration protocol for future genetic transformation studies in foxtail millet genotypes.
Collapse
Affiliation(s)
- Periyasamy Rathinapriya
- Department of Biotechnology, Science Campus, Alagappa University, Karaikudi, Tamil Nadu 630 003 India
| | - Lakkakula Satish
- Department of Biotechnology Engineering, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of Negev, 84105 Beer Sheva, Israel
| | - Ramakrishnan Rameshkumar
- Department of Biotechnology, Science Campus, Alagappa University, Karaikudi, Tamil Nadu 630 003 India
| | - Subramani Pandian
- Department of Biotechnology, Science Campus, Alagappa University, Karaikudi, Tamil Nadu 630 003 India
| | - Arockiam Sagina Rency
- Department of Biotechnology, Science Campus, Alagappa University, Karaikudi, Tamil Nadu 630 003 India
| | - Manikandan Ramesh
- Department of Biotechnology, Science Campus, Alagappa University, Karaikudi, Tamil Nadu 630 003 India
| |
Collapse
|
4
|
Rameshkumar R, Karthikeyan A, Rathinapriya P, Ramesh M. Micropropagation of traditional deep water rice (Oryza sativa L.) cv. TNR1 for viable seed production and germplasm conservation. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.01.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
5
|
Abstract
Agrobacterium-mediated transformation is a suitable method to transform different cultivars using different systems of A. tumefaciens strains and binary vectors as well as selection cassettes. We describe here a detailed protocol for two cultivars, one naked and one husked, using the AGL1 strain and the pGreen vector containing the nptII selection cassette ( http://www.pgreen.ac.uk/ ), suitable for oat as well as other cereals. The pGreen vector system was recently developed for pBract ( http://www.bract.org/ ) and its transformation ability for cereals was proved. Assuming our experience and the latest knowledge on Agrobacterium-mediated transformation of cereals, we suggest using in the protocol one of the newly developed pBract or pCAMBIA ( http://www.cambia.org/daisy/cambia/ ) vector systems which carry different selection cassettes. The commonly used selection genes nptII, bar, and hpt were proved to be applicable for oat transformation and might be used as needed.
Collapse
Affiliation(s)
- Sebastian Gasparis
- Department of Functional Genomics, Plant Breeding and Acclimatization Institute, National Research Institute, Radzikow, 05-870, Błonie, Poland
| | | |
Collapse
|
6
|
Lemesh VA, Samatadze TE, Guzenko EV, Zheleznyakova EV, Amosova AV, Zelenin AV, Muravenko OV. Features of development and reproduction of transgenic flax. Russ J Dev Biol 2014. [DOI: 10.1134/s1062360414060083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
7
|
Waminal NE, Ryu KH, Choi SH, Kim HH. Randomly detected genetically modified (GM) maize (Zea mays L.) near a transport route revealed a fragile 45S rDNA phenotype. PLoS One 2013; 8:e74060. [PMID: 24040165 PMCID: PMC3767626 DOI: 10.1371/journal.pone.0074060] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 07/29/2013] [Indexed: 11/18/2022] Open
Abstract
Monitoring of genetically modified (GM) crops has been emphasized to prevent their potential effects on the environment and human health. Monitoring of the inadvertent dispersal of transgenic maize in several fields and transport routes in Korea was carried out by qualitative multiplex PCR, and molecular analyses were conducted to identify the events of the collected GM maize. Cytogenetic investigations through fluorescence in situ hybridization (FISH) of the GM maize were performed to check for possible changes in the 45S rDNA cluster because this cluster was reported to be sensitive to replication and transcription stress. Three GM maize kernels were collected from a transport route near Incheon port, Korea, and each was found to contain NK603, stacked MON863 x NK603, and stacked NK603 x MON810 inserts, respectively. Cytogenetic analysis of the GM maize containing the stacked NK603 x MON810 insert revealed two normal compact 5S rDNA signals, but the 45S rDNA showed a fragile phenotype, demonstrating a “beads-on-a-string” fragmentation pattern, which seems to be a consequence of genetic modification. Implications of the 45S rDNA cluster fragility in GM maize are also discussed.
Collapse
Affiliation(s)
- Nomar Espinosa Waminal
- Plant Biotechnology Institute, Department of Life Science, Sahmyook University, Seoul, Korea
- Department of Plant Science, Plant Genomics and Breeding Institute and Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Ki Hyun Ryu
- Department of Horticulture, Biotechnology and Landscape Architecture, Seoul Women’s University, Seoul, Korea
| | - Sun-Hee Choi
- Department of Horticulture, Biotechnology and Landscape Architecture, Seoul Women’s University, Seoul, Korea
| | - Hyun Hee Kim
- Plant Biotechnology Institute, Department of Life Science, Sahmyook University, Seoul, Korea
- * E-mail:
| |
Collapse
|
8
|
Gasparis S, Bregier C, Orczyk W, Nadolska-Orczyk A. Agrobacterium-mediated transformation of oat (Avena sativa L.) cultivars via immature embryo and leaf explants. PLANT CELL REPORTS 2008; 27:1721-9. [PMID: 18690445 DOI: 10.1007/s00299-008-0593-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2008] [Revised: 06/16/2008] [Accepted: 07/25/2008] [Indexed: 05/21/2023]
Abstract
This paper reports on the successful Agrobacterium-mediated transformation of oat, and on some factors influencing this process. In the first step of the experiments, three cultivars, two types of explant, and three combinations of strain/vectors, which were successfully used for transformation of other cereals were tested. Transgenic plants were obtained from the immature embryos of cvs. Bajka, Slawko and Akt and from leaf base explants of cv. Bajka after transformation with A. thumefaciens strain LBA4404(pTOK233). The highest transformation rate (12.3%) was obtained for immature embryos of cv. Bajka. About 79% of the selected plants proved to be transgenic; however, only 14.3% of the T(0) plants and 27.5% of the T(1) showed GUS expression. Cell competence of both types of explant differed in terms of their transformation ability and transgene expression. The next step of the study was to test the suitability for oat transformation of the pGreen binary vector combined with different selection cassettes: nptII or bar under the nos or 35S promoter. Transgenic plants were selected in combinations transformed with nos::nptII, 35S::nptII and nos::bar. The highest transformation efficiency (5.3%) was obtained for cv. Akt transformed with nos::nptII. A detailed analysis of the T(0) plants selected from a given callus line and their progeny revealed that they were the mixture of transgenic, chimeric-transgenic and non-transgenic individuals. Southern blot analysis of T(0) and T(1) showed simple integration pattern with the low copy number of the introduced transgenes.
Collapse
Affiliation(s)
- Sebastian Gasparis
- Plant Transformation and Cell Engineering Department, Plant Breeding and Acclimatization Institute, Radzikow, Blonie, Poland
| | | | | | | |
Collapse
|
9
|
Sidorchuk YV, Deineko EV, Shumny VK. Peculiarities of cytomixis in pollen mother cells of transgenic tobacco plants (Nicotiana tabacum L.) with mutant phenotype. ACTA ACUST UNITED AC 2007. [DOI: 10.1134/s1990519x07060144] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
10
|
Functional Properties and Agronomic Performance of Transgenic Tritordeum Expressing High Molecular Weight Glutenin Subunit Genes 1Ax1 and 1Dx5. J Cereal Sci 2003. [DOI: 10.1006/jcrs.2002.0479] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
11
|
Cho MJ, Choi HW, Jiang W, Ha CD, Lemaux PG. Endosperm-specific expression of green fluorescent protein driven by the hordein promoter is stably inherited in transgenic barley (Hordeum vulgare) plants. PHYSIOLOGIA PLANTARUM 2002; 115:144-154. [PMID: 12010478 DOI: 10.1034/j.1399-3054.2002.1150117.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The expression of green fluorescent protein (GFP) and its inheritance were studied in transgenic barley (Hordeum vulgare L.) plants transformed with a synthetic green fluorescent protein gene [sgfp(S65T)] driven by either a rice actin promoter or a barley endosperm-specific d-hordein promoter. The gene encoding phosphinothricin acetyltransferase (bar), driven by the maize ubiquitin promoter and intron, was used as a selectable marker to identify transgenic tissues. Strong GFP expression driven by the rice actin promoter was observed in callus cells and in a variety of tissues of T0 plants transformed with the sgfp(S65T)-containing construct. GFP expression, driven by the rice actin promoter, was observed in 14 out of 17 independent regenerable transgenic callus lines; however, expression was gradually lost in T0 and later generation progeny of diploid lines. Stable GFP expression was observed in T2 progeny from only 6 out of the 14 (43%) independent GFP-expressing callus lines. Four of the 8 lines not expressing GFP in T2 progeny, lost GFP expression during T0 plant regeneration from calli; one lost GFP expression in the transition from the T0 to T1 generations and three lines were sterile. Similarly, expression of bar driven by the maize ubiquitin promoter was lost in T1 progeny; only 21 out of 26 (81%) independent lines were Basta-resistant. In contrast to actin-driven expression, GFP expression driven by the d-hordein promoter exhibited endosperm-specificity. All seven lines transformed with d-hordein-driven GFP (100%) expressed GFP in the T1 and T2 generations, regardless of ploidy levels, and expression segregated in a Mendelian fashion. We conclude that the sgfp(S65T) gene was successfully transformed into barley and that GFP expression driven by the d-hordein promoter was more stable in its inheritance pattern in T1 and T2 progeny than that driven by the rice actin promoter or the bar gene driven by the maize ubiquitin promoter.
Collapse
Affiliation(s)
- Myeong-Je Cho
- Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA Present address: Genenech Inc., San Francisco, CA 95616, USA Present address: Medical College of Pennsylvania, Hahnemann University, Philadelphia, PA 19129, USA
| | | | | | | | | |
Collapse
|
12
|
de Melo NF. Somatic Embryogenesis and Ploidy Stability in Cassava(Manihot esculenta Crantz) Cultivars Regenerated by in Vitro Culture of Young Leaves. CYTOLOGIA 2002. [DOI: 10.1508/cytologia.67.337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|