Improved bacterial leaf blight disease resistance in the major elite Vietnamese rice cultivar TBR225 via editing of the OsSWEET14 promoter.

TBR225 is one of the most popular commercial rice varieties in Northern Vietnam. However, this variety is highly susceptible to bacterial leaf blight (BLB), a disease caused by Xanthomonas oryzae pv. oryzae (Xoo) which can lead to important yield losses. OsSWEET14 belongs to the SWEET gene family th...

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Autores principales: Phuong Nguyen Duy, Dai Tran Lan, Hang Pham Thu, Huong Phung Thi Thu, Ha Nguyen Thanh, Ngoc Phuong Pham, Florence Auguy, Huong Bui Thi Thu, Tran Bao Manh, Sebastien Cunnac, Xuan Hoi Pham
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Publicado: Public Library of Science (PLoS) 2021
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spelling oai:doaj.org-article:145dce7282184ef4967d27e9f89903532021-12-02T20:08:24ZImproved bacterial leaf blight disease resistance in the major elite Vietnamese rice cultivar TBR225 via editing of the OsSWEET14 promoter.1932-620310.1371/journal.pone.0255470https://doaj.org/article/145dce7282184ef4967d27e9f89903532021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0255470https://doaj.org/toc/1932-6203TBR225 is one of the most popular commercial rice varieties in Northern Vietnam. However, this variety is highly susceptible to bacterial leaf blight (BLB), a disease caused by Xanthomonas oryzae pv. oryzae (Xoo) which can lead to important yield losses. OsSWEET14 belongs to the SWEET gene family that encodes sugar transporters. Together with other Clade III members, it behaves as a susceptibility (S) gene whose induction by Asian Xoo Transcription-Activator-Like Effectors (TALEs) is absolutely necessary for disease. In this study, we sought to introduce BLB resistance in the TBR225 elite variety. First, two Vietnamese Xoo strains were shown to up-regulate OsSWEET14 upon TBR225 infection. To investigate if this induction is connected with disease susceptibility, nine TBR225 mutant lines with mutations in the AvrXa7, PthXo3 or TalF TALEs DNA target sequences of the OsSWEET14 promoter were obtained using the CRISPR/Cas9 editing system. Genotyping analysis of T0 and T1 individuals showed that mutations were stably inherited. None of the examined agronomic traits of three transgene-free T2 edited lines were significantly different from those of wild-type TBR225. Importantly, one of these T2 lines, harboring the largest homozygous 6-bp deletion, displayed decreased OsSWEET14 expression as well as a significantly reduced susceptibility to a Vietnamese Xoo strains and complete resistance to another one. Our findings indicate that CRISPR/Cas9 editing conferred an improved BLB resistance to a Vietnamese commercial elite rice variety.Phuong Nguyen DuyDai Tran LanHang Pham ThuHuong Phung Thi ThuHa Nguyen ThanhNgoc Phuong PhamFlorence AuguyHuong Bui Thi ThuTran Bao ManhSebastien CunnacXuan Hoi PhamPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 9, p e0255470 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Phuong Nguyen Duy
Dai Tran Lan
Hang Pham Thu
Huong Phung Thi Thu
Ha Nguyen Thanh
Ngoc Phuong Pham
Florence Auguy
Huong Bui Thi Thu
Tran Bao Manh
Sebastien Cunnac
Xuan Hoi Pham
Improved bacterial leaf blight disease resistance in the major elite Vietnamese rice cultivar TBR225 via editing of the OsSWEET14 promoter.
description TBR225 is one of the most popular commercial rice varieties in Northern Vietnam. However, this variety is highly susceptible to bacterial leaf blight (BLB), a disease caused by Xanthomonas oryzae pv. oryzae (Xoo) which can lead to important yield losses. OsSWEET14 belongs to the SWEET gene family that encodes sugar transporters. Together with other Clade III members, it behaves as a susceptibility (S) gene whose induction by Asian Xoo Transcription-Activator-Like Effectors (TALEs) is absolutely necessary for disease. In this study, we sought to introduce BLB resistance in the TBR225 elite variety. First, two Vietnamese Xoo strains were shown to up-regulate OsSWEET14 upon TBR225 infection. To investigate if this induction is connected with disease susceptibility, nine TBR225 mutant lines with mutations in the AvrXa7, PthXo3 or TalF TALEs DNA target sequences of the OsSWEET14 promoter were obtained using the CRISPR/Cas9 editing system. Genotyping analysis of T0 and T1 individuals showed that mutations were stably inherited. None of the examined agronomic traits of three transgene-free T2 edited lines were significantly different from those of wild-type TBR225. Importantly, one of these T2 lines, harboring the largest homozygous 6-bp deletion, displayed decreased OsSWEET14 expression as well as a significantly reduced susceptibility to a Vietnamese Xoo strains and complete resistance to another one. Our findings indicate that CRISPR/Cas9 editing conferred an improved BLB resistance to a Vietnamese commercial elite rice variety.
format article
author Phuong Nguyen Duy
Dai Tran Lan
Hang Pham Thu
Huong Phung Thi Thu
Ha Nguyen Thanh
Ngoc Phuong Pham
Florence Auguy
Huong Bui Thi Thu
Tran Bao Manh
Sebastien Cunnac
Xuan Hoi Pham
author_facet Phuong Nguyen Duy
Dai Tran Lan
Hang Pham Thu
Huong Phung Thi Thu
Ha Nguyen Thanh
Ngoc Phuong Pham
Florence Auguy
Huong Bui Thi Thu
Tran Bao Manh
Sebastien Cunnac
Xuan Hoi Pham
author_sort Phuong Nguyen Duy
title Improved bacterial leaf blight disease resistance in the major elite Vietnamese rice cultivar TBR225 via editing of the OsSWEET14 promoter.
title_short Improved bacterial leaf blight disease resistance in the major elite Vietnamese rice cultivar TBR225 via editing of the OsSWEET14 promoter.
title_full Improved bacterial leaf blight disease resistance in the major elite Vietnamese rice cultivar TBR225 via editing of the OsSWEET14 promoter.
title_fullStr Improved bacterial leaf blight disease resistance in the major elite Vietnamese rice cultivar TBR225 via editing of the OsSWEET14 promoter.
title_full_unstemmed Improved bacterial leaf blight disease resistance in the major elite Vietnamese rice cultivar TBR225 via editing of the OsSWEET14 promoter.
title_sort improved bacterial leaf blight disease resistance in the major elite vietnamese rice cultivar tbr225 via editing of the ossweet14 promoter.
publisher Public Library of Science (PLoS)
publishDate 2021
url https://doaj.org/article/145dce7282184ef4967d27e9f8990353
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