DETEKSI DAN KARAKTERISASI MOLEKULER ODONTOGLOSSUM RINGSPOT VIRUS (ORSV) ISOLAT JAWA DAN BALI
| Main Authors: | , MAHFUT, S.SI., , Dr. Budi Setiadi Daryono, M. Agr.Sc. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2011
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/90294/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=53076 |
Daftar Isi:
- Orchids are one of the most important ornamental plants and cultivated in tropical countries, including in Indonesia. Virus infections become important limiting factor in orchids cultivation because it causes significant losses of the plants. Odontoglossum ringspot virus (ORSV) is one of the most reported viruses infecting orchids and spread widely in the world. The common symptoms are mosaic with line pattern and necrotic ringspot on leaf surface, and also color breaking on flower. The purpose of this research was to find out the occurrence of ORSV infecting orchids in Java and Bali, genetic relationship among ORSV isolates based on similarities of coat protein (CP) gene, and analyze the pathogenicity test isolates ORSV Java and Bali. Survey and samples collection were conducted in seven locations cultivating orchids in Java and Bali during May � August 2010. Detection with Reverse Transcription- Polymerase Chain Reaction (RT-PCR) showed that ORSV was infected three leaf samples of Phalaenopsis sp., called ORSV BOC, ORSV KRB and ORSV TNBB isolates. The results obtained by amplification of DNA band with 474 bp in length as expression of ORSV CP gene. Phylogenetic analysis based on nucleotide sequences of CP gene showed that ORSV BOC have similarity close to ORSV Germany, whereas ORSV KRB and ORSV TNBB leads to speciation that possible to be a new strain. Pathogenicity test using various healthy plants showed that ORSV BOC can infected and cause systemic symptoms on Chenopodium amaranticolor, Nicotiana tabacum, Dendrobium sp., Cymbidium sp., Chattleya sp., Phalaenopsis sp., Liparis sp., Spatthoglotis sp. and Pectelis sussanae (L.) Raf.