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Khoshnami M, Zare B, Mardani-Mehrabad H, Rakhshandehroo F, Baghery MA, Malboobi MA. Assessment of co-infection with BNYVV and BSCTV on resistance against Rhizomania disease in transgenic sugar beet plants. Transgenic Res 2023; 32:475-485. [PMID: 37656262 DOI: 10.1007/s11248-023-00364-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 08/17/2023] [Indexed: 09/02/2023]
Abstract
Sugar beet is an economically important crop and one of the major sources of sucrose around the world. Beet necrotic yellow vein virus (BNYVV) and Beet severe curly top virus (BSCTV) are two widespread viruses in sugar beet that cause severe damage to its performance. Previously, we have successfully produced resistance to BNYVV based on RNA silencing in sugar beet by introducing constructs carrying the viral coat-protein-encoding DNA sequence, CP21, in sense and anti-sense orientations. Yet, the RNA silencing-mediated resistance to a specific virus could be affected by other ones as a part of synergistic interactions. In this study, we assayed the specificity of the induced resistance against BNYVV in two sets of transgenic events, S3 and S6 carrying 5'-UTR with or without CP21-coding sequences, respectively. These events were subjected to viral challenges with either BNYVV, an Iranian isolate of BSCTV (BSCTV-Ir) or both. All the plants inoculated with just BSCTV-Ir displayed curly-leaf symptoms. However, partial resistance was evident in S3 events as shown by mild symptoms and reduced PCR amplification of the BSCTV-Ir coat protein encoding sequence. Based on the presented data, resistance to BNYVV was stable in almost all the transgenic plants co-infected with BSCTV-Ir, except for one event, S3-229. In general, it seems that the co-infection does not affect the resistance to BNYVV in transgenic plants. These findings demonstrated that the introduced RNA silencing-mediated resistance against BNYVV in transgenic sugar beets is specific and is not suppressed after co-infection with a heterologous virus.
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Affiliation(s)
- Maryam Khoshnami
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology, Pazhouhesh Boulevard, Karaj Highway, Tehran, Iran
- Department of Plant Pathology, College of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University, Shohadaye Hesarak Boulevard, Daneshgah Square, Satary Highway, Tehran, Iran
| | - Bahar Zare
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology, Pazhouhesh Boulevard, Karaj Highway, Tehran, Iran
| | - Hamideh Mardani-Mehrabad
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology, Pazhouhesh Boulevard, Karaj Highway, Tehran, Iran
- Department of Plant Pathology, College of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University, Shohadaye Hesarak Boulevard, Daneshgah Square, Satary Highway, Tehran, Iran
| | - Farshad Rakhshandehroo
- Department of Plant Pathology, College of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University, Shohadaye Hesarak Boulevard, Daneshgah Square, Satary Highway, Tehran, Iran
| | - Mohammad Amin Baghery
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology, Pazhouhesh Boulevard, Karaj Highway, Tehran, Iran
| | - Mohammad Ali Malboobi
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology, Pazhouhesh Boulevard, Karaj Highway, Tehran, Iran.
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