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Butcher CL, Rubin BY, Anderson SL, Lewis JD. Long-Distance Pollen Dispersal in Urban Green Roof and Ground-Level Habitats. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.790464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Long-distance pollen dispersal is critical for gene flow in plant populations, yet pollen dispersal patterns in urban habitats such as green roofs have not been extensively studied. Pollen dispersal patterns typically are assessed either by fitting non-linear models to the relationship between the degree of pollen dispersal and distance to the pollen source (i.e., curve fitting), or by fitting probability density functions (PDFs) to pollen dispersal probability histograms (i.e., PDF fitting). Studies using curve fitting typically report exponential decay patterns in pollen dispersal. However, PDF fitting typically produces more fat-tailed distributions, suggesting the exponential decay may not be the best fitting model. Because the two approaches may yield conflicting results, we used both approaches to examine pollen dispersal patterns in the wind-pollinated Amaranthus tuberculatus and the insect-pollinated Solanum lycopersicum at two green roof and two ground-level sites in the New York (NY, United States) metropolitan area. For the curve fitting analyses, the exponential decay and inverse power curves provided good fits to pollen dispersal patterns across both green roof and ground-level sites for both species. Similar patterns were observed with the PDF fitting analyses, where the exponential or inverse Gaussian were the top PDF at most sites for both species. While the curve fitting results are consistent with other studies, the results differ from most studies using PDF fitting, where long-distance pollen dispersal is more common than we observed. These results highlight the need for further research to compare curve and PDF fitting for predicting pollen dispersal patterns. And, critically, while long-distance pollen dispersal may be an important component of overall pollen dispersal for A. tuberculatus and S. lycopersicum in both urban green roof and ground-level sites, our results suggest it potentially may occur to a lesser extent compared with plants in less-urban areas.
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Retraction: Investigating Pollen and Gene Flow of WYMV-Resistant Transgenic Wheat N12-1 Using a Dwarf Male-Sterile Line as the Pollen Receptor. PLoS One 2022; 17:e0265375. [PMID: 35263386 PMCID: PMC8906610 DOI: 10.1371/journal.pone.0265375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Butcher CL, Rubin BY, Anderson SL, Lewis JD. Pollen dispersal patterns differ among sites for a wind-pollinated species and an insect-pollinated species. AMERICAN JOURNAL OF BOTANY 2020; 107:1504-1517. [PMID: 33108685 DOI: 10.1002/ajb2.1554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 07/23/2020] [Indexed: 06/11/2023]
Abstract
PREMISE Pollen dispersal, the main component of overall plant gene flow, generally decreases with increasing distance from the pollen source, but the pattern of this relationship may differ among sites. Although site-based differences in pollen dispersal may lead to over- or underestimation of gene flow, no studies have investigated pollen dispersal patterns among differing urban site types, despite the incongruent range of habitats in urban areas. METHODS We used paternity assignment to assess pollen dispersal patterns in a wind-pollinated species (waterhemp; Amaranthus tuberculatus) and in an insect-pollinated species (tomato; Solanum lycopersicum) in experimental arrays at four disparate sites (two roof-level sites, two ground-level sites) in the New York (New York, USA) metropolitan area. RESULTS The number of seeds or fruits, a proxy for the number of flowers pollinated, decreased with increasing distance from the pollen donors at all sites for both species. However, the mean number of Amaranthus tuberculatusseeds produced at a given distance differed two-fold among sites, while the slope of the relationship between Solanum lycopersicumfruit production and distance differed by a factor of four among sites. CONCLUSIONS Pollen dispersal patterns may differ substantially among sites, both in the amount of pollen dispersed at a given distance and in the proportional decrease in pollen dispersal with increasing distance, and these effects may act independently. Accordingly, the capacity of plant species to adapt to climate change and other selection pressures may be different from predictions based on pollen dispersal patterns at a single location.
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Affiliation(s)
- Chelsea L Butcher
- Louis Calder Center - Biological Field Station, Fordham University, 31 Whippoorwill Road, Armonk, New York, 10504, USA
- Center for Urban Ecology, Fordham University, 441 East Fordham Road, Bronx, New York, 10458, USA
- Department of Biological Sciences, Fordham University, 441 East Fordham Road, Bronx, New York, 10458, USA
- Department of Mathematics and Natural Sciences, Northwood University, 4000 Whiting Drive, Midland, Michigan, 48640, USA
| | - Berish Y Rubin
- Department of Biological Sciences, Fordham University, 441 East Fordham Road, Bronx, New York, 10458, USA
| | - Sylvia L Anderson
- Department of Biological Sciences, Fordham University, 441 East Fordham Road, Bronx, New York, 10458, USA
| | - James D Lewis
- Louis Calder Center - Biological Field Station, Fordham University, 31 Whippoorwill Road, Armonk, New York, 10504, USA
- Center for Urban Ecology, Fordham University, 441 East Fordham Road, Bronx, New York, 10458, USA
- Department of Biological Sciences, Fordham University, 441 East Fordham Road, Bronx, New York, 10458, USA
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Wang Y, Xie J, Wu E, Yahuza L, Duan G, Shen L, Liu H, Zhou S, Nkurikiyimfura O, Andersson B, Yang L, Shang L, Zhu W, Zhan J. Lack of gene flow between Phytophthora infestans populations of two neighboring countries with the largest potato production. Evol Appl 2020; 13:318-329. [PMID: 31993079 PMCID: PMC6976962 DOI: 10.1111/eva.12870] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 08/23/2019] [Accepted: 08/29/2019] [Indexed: 12/18/2022] Open
Abstract
Gene flow is an important evolutionary force that enables adaptive responses of plant pathogens in response to changes in the environment and plant disease management strategies. In this study, we made a direct inference concerning gene flow in the Irish famine pathogen Phytophthora infestans between two of its hosts (potato and tomato) as well as between China and India. This was done by comparing sequence characteristics of the eukaryotic translation elongation factor 1 alpha (eEF-1α) gene, generated from 245 P. infestans isolates sampled from two countries and hosts. Consistent with previous results, we found that eEF-1α gene was highly conserved and point mutation was the only mechanism generating any sequence variation. Higher genetic variation was found in the eEF-1α sequences in the P. infestans populations sampled from tomato compared to those sampled from potato. We also found the P. infestans population from India displayed a higher genetic variation in the eEF-1α sequences compared to China. No gene flow was detected between the pathogen populations from the two countries, which is possibly attributed to the geographic barrier caused by Himalaya Plateau and the minimum cross-border trade of potato and tomato products. The implications of these results for a sustainable management of late blight diseases are discussed.
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Affiliation(s)
- Yan‐Ping Wang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Jia‐Hui Xie
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - E‐Jiao Wu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Lurwanu Yahuza
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Guo‐Hua Duan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Lin‐Lin Shen
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Hao Liu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Shi‐Hao Zhou
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Oswald Nkurikiyimfura
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Björn Andersson
- Department of Forest Mycology and Plant PathologySwedish University of Agricultural SciencesUppsalaSweden
| | - Li‐Na Yang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Li‐Ping Shang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Wen Zhu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Jiasui Zhan
- Key Lab for Biopesticide and Chemical BiologyMinistry of EducationFujian Agriculture and Forestry UniversityFuzhouChina
- Department of Forest Mycology and Plant PathologySwedish University of Agricultural SciencesUppsalaSweden
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Zhang CJ, Yook MJ, Park HR, Lim SH, Kim JW, Song JS, Nah G, Song HR, Jo BH, Roh KH, Park S, Jang YS, Noua IS, Kim DS. Evaluation of maximum potential gene flow from herbicide resistant Brassica napus to its male sterile relatives under open and wind pollination conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 634:821-830. [PMID: 29653426 DOI: 10.1016/j.scitotenv.2018.03.390] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 03/28/2018] [Accepted: 03/31/2018] [Indexed: 06/08/2023]
Abstract
Pollen-mediated gene flow (PMGF) from genetically modified (GM) Brassica napus to its wild relatives by wind and insects is a major ecological concern in agricultural ecosystems. This study conducted is to estimate maximum potential gene flow and differentiate between wind- and bee-mediated gene flows from herbicide resistant (HR) B. napus to its closely-related male sterile (MS) relatives, B. napus, B. juncea and Raphanus sativus. Various markers, including pods formation in MS plants, herbicide resistance, and SSR markers, were used to identify the hybrids. Our results revealed the following: 1) maximum potential gene flow (a maximum % of the progeny of pollen recipient confirmed hybrid) to MS B. napus ranged from 32.48 to 0.30% and from 14.69 to 0.26% at 2-128 m from HR B. napus under open and wind pollination conditions, respectively, and to MS B. juncea ranged from 21.95 to 0.24% and from 6.16 to 0.16%, respectively; 2) estimates of honeybee-mediated gene flow decreased with increasing distance from HR B. napus and ranged from 17.78 to 0.03% at 2-128 m for MS B. napus and from 15.33 to 0.08% for MS B. juncea; 3) a small-scale donor plots would strongly favour insect over wind pollination; 4) no gene flow occurred from HR B. napus to MS R. sativus. Our approach and findings are helpful in understanding the relative contribution of wind and bees to gene flow and useful for estimating maximum potential gene flow and managing environmental risks associated with gene flow.
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Affiliation(s)
- Chuan-Jie Zhang
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Min-Jung Yook
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Hae-Rim Park
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Soo-Hyun Lim
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jin-Won Kim
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jong-Seok Song
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Gyoungju Nah
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Hae-Ryong Song
- Division of Conservation Ecology, Bureau of Ecological Conservation Research, National Institute of Ecology, Seocheon-gun, Choongnam 33657, Republic of Korea
| | - Beom-Ho Jo
- Division of Conservation Ecology, Bureau of Ecological Conservation Research, National Institute of Ecology, Seocheon-gun, Choongnam 33657, Republic of Korea
| | - Kyung Hee Roh
- Department of Agricultural Biotechnology, National Institute of Agricultural Academy, Rural Development Administration, Wanju-gun, Jeonbuk 55365, Republic of Korea
| | - Suhyoung Park
- Department of Horticultural Crop Research, National Institute of Horticultural and Herbal Science, Rural Development Administration, Wanju-gun, Jeonbuk 55365, Republic of Korea
| | - Young-Seok Jang
- Bioenery Crop Research Institute, National Institute of Crop Science, Rural Development Administration, Muan, Jeonnam 58545, Republic of Korea
| | - Ill-Sup Noua
- Department of Horticulture, Sunchon National University, Sunchon, Jeonnam 57922, Republic of Korea
| | - Do-Soon Kim
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.
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Horn P, Nausch H, Baars S, Schmidtke J, Schmidt K, Schneider A, Leister D, Broer I. Paternal inheritance of plastid-encoded transgenes in Petunia hybrida in the greenhouse and under field conditions. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2017; 16:26-31. [PMID: 29159138 PMCID: PMC5684430 DOI: 10.1016/j.btre.2017.11.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 10/20/2017] [Accepted: 11/01/2017] [Indexed: 01/23/2023]
Abstract
As already demonstrated in greenhouse trials, outcrossing of transgenic plants can be drastically reduced via transgene integration into the plastid. We verified this result in the field with Petunia, for which the highest paternal leakage has been observed. The variety white 115 (W115) served as recipient and Pink Wave (PW) and the transplastomic variant PW T16, encoding the uidA reporter gene, as pollen donor. While manual pollination in the greenhouse led to over 90% hybrids for both crossings, the transgenic donor resulted only in 2% hybrids in the field. Nevertheless paternal leakage was detected in one case which proves that paternal inheritance of plastid-located transgenes is possible under artificial conditions. In the greenhouse, paternal leakage occurred in a frequency comparable to published results. As expected natural pollination reduced the hybrid formation in the field from 90 to 7.6% and the transgenic donor did not result in any hybrid.
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Affiliation(s)
- Patricia Horn
- University of Rostock, Faculty of Agricultural and Environmental Sciences, Department of Agrobiotechnology and Risk Assessment for Bio- und Gene Technology, Justus-von-Liebig Weg 8, 18059 Rostock, Germany
| | - Henrik Nausch
- University of Rostock, Faculty of Agricultural and Environmental Sciences, Department of Agrobiotechnology and Risk Assessment for Bio- und Gene Technology, Justus-von-Liebig Weg 8, 18059 Rostock, Germany
| | - Susanne Baars
- University of Rostock, Faculty of Agricultural and Environmental Sciences, Department of Agrobiotechnology and Risk Assessment for Bio- und Gene Technology, Justus-von-Liebig Weg 8, 18059 Rostock, Germany
| | - Jörg Schmidtke
- BioMath GmbH, Friedrich-Barnewitz-Str. 8, 18119, Rostock-Warnemünde, Germany
| | - Kerstin Schmidt
- BioMath GmbH, Friedrich-Barnewitz-Str. 8, 18119, Rostock-Warnemünde, Germany
| | - Anja Schneider
- Ludwig-Maximilians-University Munich (LMU), Faculty of Biology, Chair of Plant Molecular Biology (Botany), Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany
| | - Dario Leister
- Ludwig-Maximilians-University Munich (LMU), Faculty of Biology, Chair of Plant Molecular Biology (Botany), Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany
| | - Inge Broer
- University of Rostock, Faculty of Agricultural and Environmental Sciences, Department of Agrobiotechnology and Risk Assessment for Bio- und Gene Technology, Justus-von-Liebig Weg 8, 18059 Rostock, Germany
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Tsatsakis AM, Nawaz MA, Kouretas D, Balias G, Savolainen K, Tutelyan VA, Golokhvast KS, Lee JD, Yang SH, Chung G. Environmental impacts of genetically modified plants: A review. ENVIRONMENTAL RESEARCH 2017; 156:818-833. [PMID: 28347490 DOI: 10.1016/j.envres.2017.03.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 03/07/2017] [Accepted: 03/08/2017] [Indexed: 06/06/2023]
Abstract
Powerful scientific techniques have caused dramatic expansion of genetically modified crops leading to altered agricultural practices posing direct and indirect environmental implications. Despite the enhanced yield potential, risks and biosafety concerns associated with such GM crops are the fundamental issues to be addressed. An increasing interest can be noted among the researchers and policy makers in exploring unintended effects of transgenes associated with gene flow, flow of naked DNA, weediness and chemical toxicity. The current state of knowledge reveals that GM crops impart damaging impacts on the environment such as modification in crop pervasiveness or invasiveness, the emergence of herbicide and insecticide tolerance, transgene stacking and disturbed biodiversity, but these impacts require a more in-depth view and critical research so as to unveil further facts. Most of the reviewed scientific resources provide similar conclusions and currently there is an insufficient amount of data available and up until today, the consumption of GM plant products are safe for consumption to a greater extent with few exceptions. This paper updates the undesirable impacts of GM crops and their products on target and non-target species and attempts to shed light on the emerging challenges and threats associated with it. Underpinning research also realizes the influence of GM crops on a disturbance in biodiversity, development of resistance and evolution slightly resembles with the effects of non-GM cultivation. Future prospects are also discussed.
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Affiliation(s)
- Aristidis M Tsatsakis
- Department of Toxicology and Forensics, School of Medicine, University of Crete, Heraklion, Crete, Greece; Educational Scientific Center of Nanotechnology, Far Eastern Federal University, Vladivostok 690950, Russian Federation
| | - Muhammad Amjad Nawaz
- Department of Biotechnology, Chonnam National University, Yeosu, Chonnam 59626, Republic of Korea
| | - Demetrios Kouretas
- Department of Biochemistry-Biotechnology, University of Thessaly, Larisa, Greece
| | | | - Kai Savolainen
- Finnish Institute of Occupational Health, POB 40 Helsinki, Finland
| | - Victor A Tutelyan
- Federal Research Centre of Nutrition, Biotechnology and Food Safety, Moscow, Russian Federation
| | - Kirill S Golokhvast
- Educational Scientific Center of Nanotechnology, Far Eastern Federal University, Vladivostok 690950, Russian Federation; Pacific Institute of Geography, FEB RAS, Vladivostok 690041, Russian Federation
| | - Jeong Dong Lee
- School of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Seung Hwan Yang
- Department of Biotechnology, Chonnam National University, Yeosu, Chonnam 59626, Republic of Korea
| | - Gyuhwa Chung
- Department of Biotechnology, Chonnam National University, Yeosu, Chonnam 59626, Republic of Korea.
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Tsatsakis AM, Nawaz MA, Tutelyan VA, Golokhvast KS, Kalantzi OI, Chung DH, Kang SJ, Coleman MD, Tyshko N, Yang SH, Chung G. Impact on environment, ecosystem, diversity and health from culturing and using GMOs as feed and food. Food Chem Toxicol 2017. [PMID: 28645870 DOI: 10.1016/j.fct.2017.06.033] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Modern agriculture provides the potential for sustainable feeding of the world's increasing population. Up to the present moment, genetically modified (GM) products have enabled increased yields and reduced pesticide usage. Nevertheless, GM products are controversial amongst policy makers, scientists and the consumers, regarding their possible environmental, ecological, and health risks. Scientific-and-political debates can even influence legislation and prospective risk assessment procedure. Currently, the scientifically-assessed direct hazardous impacts of GM food and feed on fauna and flora are conflicting; indeed, a review of literature available data provides some evidence of GM environmental and health risks. Although the consequences of gene flow and risks to biodiversity are debatable. Risks to the environment and ecosystems can exist, such as the evolution of weed herbicide resistance during GM cultivation. A matter of high importance is to provide precise knowledge and adequate current information to regulatory agencies, governments, policy makers, researchers, and commercial GMO-releasing companies to enable them to thoroughly investigate the possible risks.
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Affiliation(s)
- Aristidis M Tsatsakis
- Laboratory of Toxicology, School of Medicine, University of Crete, Heraklion, Crete, Greece
| | - Muhammad Amjad Nawaz
- Department of Biotechnology, Chonnam National University, Yeosu, Chonnam, 59626, Republic of Korea
| | - Victor A Tutelyan
- Federal Research Centre of Nutrition, Biotechnology and Food Safety, Moscow, Russian Federation
| | - Kirill S Golokhvast
- Educational Scientific Center of Nanotechnology, Engineering School, Far Eastern Federal Univeristy, 37 Pushkinskaya Street, 690950, Vladivostok, Russian Federation
| | | | - Duck Hwa Chung
- Department of Agricultural Chemistry and Food Science and Technology, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea
| | - Sung Jo Kang
- Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, Geyongnam 52828, Republic of Korea
| | - Michael D Coleman
- School of Life and Health Sciences, Aston University, Birmingham, United Kingdom
| | - Nadia Tyshko
- Federal Research Centre of Nutrition, Biotechnology and Food Safety, Moscow, Russian Federation
| | - Seung Hwan Yang
- Department of Biotechnology, Chonnam National University, Yeosu, Chonnam, 59626, Republic of Korea
| | - Gyuhwa Chung
- Department of Biotechnology, Chonnam National University, Yeosu, Chonnam, 59626, Republic of Korea.
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Wang K, Liu H, Du L, Ye X. Generation of marker-free transgenic hexaploid wheat via an Agrobacterium-mediated co-transformation strategy in commercial Chinese wheat varieties. PLANT BIOTECHNOLOGY JOURNAL 2017; 15:614-623. [PMID: 27862820 PMCID: PMC5399001 DOI: 10.1111/pbi.12660] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 11/04/2016] [Accepted: 11/05/2016] [Indexed: 05/02/2023]
Abstract
Genotype specificity is a big problem lagging the development of efficient hexaploid wheat transformation system. Increasingly, the biosecurity of genetically modified organisms is garnering public attention, so the generation of marker-free transgenic plants is very important to the eventual potential commercial release of transgenic wheat. In this study, 15 commercial Chinese hexaploid wheat varieties were successfully transformed via an Agrobacterium-mediated method, with efficiency of up to 37.7%, as confirmed by the use of Quickstix strips, histochemical staining, PCR analysis and Southern blotting. Of particular interest, marker-free transgenic wheat plants from various commercial Chinese varieties and their F1 hybrids were successfully obtained for the first time, with a frequency of 4.3%, using a plasmid harbouring two independent T-DNA regions. The average co-integration frequency of the gus and the bar genes located on the two independent T-DNA regions was 49.0% in T0 plants. We further found that the efficiency of generating marker-free plants was related to the number of bar gene copies integrated in the genome. Marker-free transgenic wheat plants were identified in the progeny of three transgenic lines that had only one or two bar gene copies. Moreover, silencing of the bar gene was detected in 30.7% of T1 positive plants, but the gus gene was never found to be silenced in T1 plants. Bisulphite genomic sequencing suggested that DNA methylation in the 35S promoter of the bar gene regulatory region might be the main reason for bar gene silencing in the transgenic plants.
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Affiliation(s)
- Ke Wang
- Institute of Crop ScienceChinese Academy of Agricultural SciencesBeijingChina
| | - Huiyun Liu
- Institute of Crop ScienceChinese Academy of Agricultural SciencesBeijingChina
| | - Lipu Du
- Institute of Crop ScienceChinese Academy of Agricultural SciencesBeijingChina
| | - Xingguo Ye
- Institute of Crop ScienceChinese Academy of Agricultural SciencesBeijingChina
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