[en] Virus infection is the key constraint to potato cultivation worldwide. Especially, coinfection by multiple viruses could exacerbate the yield loss. Transgenic plants expressing artificial microRNAs (amiRNAs) have been shown to confer specific resistance to viruses. In this study, three amiRNAs containing Arabidopsis miR159 as a backbone, expressing genes targeting P25, HC-Pro and Brp1 of potato virus X (PVX), potato virus Y (PVY) and potato spindle tuber viroid (PSTVd), were constructed. amiR-159P25, amiR-159HCPro and amiR-159Brp1 were cloned into the plant expression vector pCAMBIA1301 with a CaMV35S promoter, producing the p1301-pre-amiRP25-HCPro-Brp1 vector. Twenty-three transgenic plants (Solanum tuberosum cv. 'Youjin') were obtained by Agrobacterium tumefaciens-mediated transformation, and ten PCR-positive transplants were chosen for further analysis. Quantitative real-time PCR results indicated that 10 transgenic plants could express amiRNAs successfully. Southern blotting hybridization proved that amiR-159P25-HCPro-Brp1 had integrated into potato genome in transgenic lines. Viral (viroid) challenge assays revealed that these transgenic plants demonstrated resistance against PVX, PVY and PSTVd coinfection simultaneously, whereas the untransformed controls developed severe symptoms. This study demonstrates a novel amiRNA-based mechanism that may have the potential to develop multiple viral resistance strategies in potato.
Disciplines :
Biotechnology
Author, co-author :
Jiang, Lili ; College of Agriculture, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Development Zone, Daqing, 163319 People's Republic of China ; Key Laboratory of Low-Carbon Green Agriculture in Northeastern China, Ministry of Agriculture and Rural Affairs, Daqing, 163319 People's Republic of China
Mu, Rui; College of Agriculture, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Development Zone, Daqing, 163319 People's Republic of China
Wang, Ziquan; Heilongjiang Academy of Agricultural Sciences, 368 Xuefu Road, Nangang District, Harbin, 150086 People's Republic of China
Liu, Shangwu ; Université de Liège - ULiège > TERRA Research Centre ; Heilongjiang Academy of Agricultural Sciences, 368 Xuefu Road, Nangang District, Harbin, 150086 People's Republic of China
Lu, Dianqiu; Heilongjiang Academy of Agricultural Sciences, 368 Xuefu Road, Nangang District, Harbin, 150086 People's Republic of China
Language :
English
Title :
Silencing P25, HC-Pro and Brp1 of Potato Virus (Viroid) Using Artificial microRNA Confers Resistance to PVX, PVY and PSTVd in Transgenic Potato.
Publication date :
18 August 2022
Journal title :
Potato Research
ISSN :
0014-3065
Publisher :
Springer Science and Business Media LLC, Netherlands
he Sub-Project of the National Key Research and Development Program of China Heilongjiang Bayi Agricultural University Support Program for San Heng San Zong
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