H<sub>2</sub>O<sub>2</sub>-Based Method for Rapid Detection of Transgene-Free Rice Plants from Segregating CRISPR/Cas9 Genome-Edited Progenies
Genome-editing techniques such as CRISPR/Cas9 have been widely used in crop functional genomics and improvement. To efficiently deliver the guide RNA and Cas9, most studies still rely on <i>Agrobacterium</i>-mediated transformation, which involves a selection marker gene. However, severa...
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doaj-b95882f264f24e60b78a6238dfdecb762020-11-25T01:17:11ZengMDPI AGInternational Journal of Molecular Sciences1422-00672019-08-012016388510.3390/ijms20163885ijms20163885H<sub>2</sub>O<sub>2</sub>-Based Method for Rapid Detection of Transgene-Free Rice Plants from Segregating CRISPR/Cas9 Genome-Edited ProgeniesTsung-Meng Wu0Jian-Zhi Huang1Hui-Min Oung2Yi-Ting Hsu3Yu-Chang Tsai4Chwan-Yang Hong5Department of Agricultural Chemistry, College of Bioresources and Agriculture, National Taiwan University, Taipei 10617, TaiwanDepartment of Agricultural Chemistry, College of Bioresources and Agriculture, National Taiwan University, Taipei 10617, TaiwanDepartment of Agricultural Chemistry, College of Bioresources and Agriculture, National Taiwan University, Taipei 10617, TaiwanDepartment of Agronomy, College of Agriculture and Natural Resources, National Chung-Hsing University, Taichung 10617, TaiwanDepartment of Agronomy, College of Bioresources and Agriculture, National Taiwan University, Taipei 10617, TaiwanDepartment of Agricultural Chemistry, College of Bioresources and Agriculture, National Taiwan University, Taipei 10617, TaiwanGenome-editing techniques such as CRISPR/Cas9 have been widely used in crop functional genomics and improvement. To efficiently deliver the guide RNA and Cas9, most studies still rely on <i>Agrobacterium</i>-mediated transformation, which involves a selection marker gene. However, several limiting factors may impede the efficiency of screening transgene-free genome-edited plants, including the time needed to produce each life cycle, the response to selection reagents, and the labor costs of PCR-based genotyping. To overcome these disadvantages, we developed a simple and high-throughput method based on visual detection of antibiotics-derived H<sub>2</sub>O<sub>2</sub> to verify transgene-free genome-edited plants. In transgenic rice containing <i>hygromycin phosphotransferase</i> (<i>HPT</i>), H<sub>2</sub>O<sub>2</sub> content did not change in the presence of hygromycin B (HyB). In contrast, in transgenic-free rice plants with 10-h HyB treatment, levels of H<sub>2</sub>O<sub>2</sub> and malondialdehyde, indicators of oxidative stress, were elevated. Detection of H<sub>2</sub>O<sub>2</sub> by 3,3′-diaminobenzidine (DAB) staining suggested that H<sub>2</sub>O<sub>2</sub> could be a marker to efficiently distinguish transgenic and non-transgenic plants. Analysis of 24 segregating progenies of an <i>HPT</i>-containing rice plant by RT-PCR and DAB staining verified that DAB staining is a feasible method for detecting transformants and non-transformants. Transgene-free genome-edited plants were faithfully validated by both PCR and the H<sub>2</sub>O<sub>2</sub>-based method. Moreover, HyB induced overproduction of H<sub>2</sub>O<sub>2</sub> in leaves of <i>Arabidopsis</i>, maize, tobacco, and tomato, which suggests the potential application of the DAB method for detecting transgenic events containing <i>HPT</i> in a wide range of plant species. Thus, visual detection of DAB provides a simple, cheap, and reliable way to efficiently identify transgene-free genome-edited and <i>HPT</i>-containing transgenic rice.https://www.mdpi.com/1422-0067/20/16/3885DAB (3,3′-diaminobenzidine)H<sub>2</sub>O<sub>2</sub>hygromycinhygromycin phosphotransferasericeCRISPRreactive oxygen species |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tsung-Meng Wu Jian-Zhi Huang Hui-Min Oung Yi-Ting Hsu Yu-Chang Tsai Chwan-Yang Hong |
spellingShingle |
Tsung-Meng Wu Jian-Zhi Huang Hui-Min Oung Yi-Ting Hsu Yu-Chang Tsai Chwan-Yang Hong H<sub>2</sub>O<sub>2</sub>-Based Method for Rapid Detection of Transgene-Free Rice Plants from Segregating CRISPR/Cas9 Genome-Edited Progenies International Journal of Molecular Sciences DAB (3,3′-diaminobenzidine) H<sub>2</sub>O<sub>2</sub> hygromycin hygromycin phosphotransferase rice CRISPR reactive oxygen species |
author_facet |
Tsung-Meng Wu Jian-Zhi Huang Hui-Min Oung Yi-Ting Hsu Yu-Chang Tsai Chwan-Yang Hong |
author_sort |
Tsung-Meng Wu |
title |
H<sub>2</sub>O<sub>2</sub>-Based Method for Rapid Detection of Transgene-Free Rice Plants from Segregating CRISPR/Cas9 Genome-Edited Progenies |
title_short |
H<sub>2</sub>O<sub>2</sub>-Based Method for Rapid Detection of Transgene-Free Rice Plants from Segregating CRISPR/Cas9 Genome-Edited Progenies |
title_full |
H<sub>2</sub>O<sub>2</sub>-Based Method for Rapid Detection of Transgene-Free Rice Plants from Segregating CRISPR/Cas9 Genome-Edited Progenies |
title_fullStr |
H<sub>2</sub>O<sub>2</sub>-Based Method for Rapid Detection of Transgene-Free Rice Plants from Segregating CRISPR/Cas9 Genome-Edited Progenies |
title_full_unstemmed |
H<sub>2</sub>O<sub>2</sub>-Based Method for Rapid Detection of Transgene-Free Rice Plants from Segregating CRISPR/Cas9 Genome-Edited Progenies |
title_sort |
h<sub>2</sub>o<sub>2</sub>-based method for rapid detection of transgene-free rice plants from segregating crispr/cas9 genome-edited progenies |
publisher |
MDPI AG |
series |
International Journal of Molecular Sciences |
issn |
1422-0067 |
publishDate |
2019-08-01 |
description |
Genome-editing techniques such as CRISPR/Cas9 have been widely used in crop functional genomics and improvement. To efficiently deliver the guide RNA and Cas9, most studies still rely on <i>Agrobacterium</i>-mediated transformation, which involves a selection marker gene. However, several limiting factors may impede the efficiency of screening transgene-free genome-edited plants, including the time needed to produce each life cycle, the response to selection reagents, and the labor costs of PCR-based genotyping. To overcome these disadvantages, we developed a simple and high-throughput method based on visual detection of antibiotics-derived H<sub>2</sub>O<sub>2</sub> to verify transgene-free genome-edited plants. In transgenic rice containing <i>hygromycin phosphotransferase</i> (<i>HPT</i>), H<sub>2</sub>O<sub>2</sub> content did not change in the presence of hygromycin B (HyB). In contrast, in transgenic-free rice plants with 10-h HyB treatment, levels of H<sub>2</sub>O<sub>2</sub> and malondialdehyde, indicators of oxidative stress, were elevated. Detection of H<sub>2</sub>O<sub>2</sub> by 3,3′-diaminobenzidine (DAB) staining suggested that H<sub>2</sub>O<sub>2</sub> could be a marker to efficiently distinguish transgenic and non-transgenic plants. Analysis of 24 segregating progenies of an <i>HPT</i>-containing rice plant by RT-PCR and DAB staining verified that DAB staining is a feasible method for detecting transformants and non-transformants. Transgene-free genome-edited plants were faithfully validated by both PCR and the H<sub>2</sub>O<sub>2</sub>-based method. Moreover, HyB induced overproduction of H<sub>2</sub>O<sub>2</sub> in leaves of <i>Arabidopsis</i>, maize, tobacco, and tomato, which suggests the potential application of the DAB method for detecting transgenic events containing <i>HPT</i> in a wide range of plant species. Thus, visual detection of DAB provides a simple, cheap, and reliable way to efficiently identify transgene-free genome-edited and <i>HPT</i>-containing transgenic rice. |
topic |
DAB (3,3′-diaminobenzidine) H<sub>2</sub>O<sub>2</sub> hygromycin hygromycin phosphotransferase rice CRISPR reactive oxygen species |
url |
https://www.mdpi.com/1422-0067/20/16/3885 |
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