Abstract
Calanthe mild mosaic virus (CalMMV) infecting orchids is an important potyvirus which is known to cause mild leaf mosaic and flower colour-breaking symptoms in Calanthe and other orchid plants. The present study reports the production of polyclonal antibodies against CalMMV using bacterially expressed recombinant coat protein as immunogen, which in turn would be useful in routine indexing and screening of orchid germplasm. The coat protein (CP) gene (~ 807 bp) of CalMMV isolated from infected orchid sample was cloned in expression vector, pET-28a ( +) that yielded ~ 31 kDa fusion protein with Histidine tag (His6BP). The expression of fusion CP was confirmed through SDS–PAGE and Western blotting. The His6BP-CalMMV-CP obtained in soluble state after purification was used to immunize New Zealand white rabbit for the production of polyclonal antibodies (PAb). The PAb produced against the purified fusion protein successfully detected CAlMMV in the orchid samples at a dilution of 1:2000 in direct antigen-coated enzyme-linked immunosorbent assay (DAC-ELISA). This study presents the first report of Histidine tag (His6BP) fusion CalMMV-CP-based antibody production and its successful application in the identification of the virus in orchid plants. Outcome of this study will be helpful in routine certification programmes, screening of orchid germplasm and production of CalMMV-free planting materials of orchids.
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The data generated or analyzed along with supplementary information which is included in the manuscript can be obtained from the corresponding author on reasonable request.
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Funding
This work was sponsored and funded under the “National Certification System for Tissue Culture Raised Plants (NCS-TCP)” programme which is currently running at Referral Centre for Virus Indexing, ICAR-IARI, New Delhi, by the Department of Biotechnology, Ministry of Science & Technology, Government of India.
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Conceptualization, NS, RK-2 (RK), RPP and VKB; Methodology, NS, RK-1 (Rakesh Kumar) and AK; Validation, NS, RK-1 and AK; Formal Analysis, NS, RK-2, SKS, NG. Investigation, NS, RK-1 and AK; Resources, RPP and VKB; Writing—Original Draft Preparation, NS, GK, SKS and NG; Writing—Review and Editing, SKS, RPP and VKB; Supervision, RPP and VKB; Funding Acquisition, RPP and VKB.
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Srivastava, N., Kumar, R., Kapoor, R. et al. Development of Polyclonal Antibodies-Based Serological Method for the Detection of Calanthe Mild Mosaic Virus and Application in Virus Certification Programme. Mol Biotechnol (2024). https://doi.org/10.1007/s12033-024-01074-0
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DOI: https://doi.org/10.1007/s12033-024-01074-0