Journal List > J Bacteriol Virol > v.45(1) > 1034203

Lee, Lee, Shin, Lee, and Ahn: Development and Verification of Nested PCR Assay for Detection of Tobacco rattle virus in Plant Quarantine

Abstract

Tobacco rattle virus (TRV) is a plant pathogen belonging to the Group IV positive-sense single-stranded RNA viruses. TRV causes disease in various plants (e.g., potato, tomato and tobacco), for which it was classified as a controlled quarantine virus in Korea. This study aimed to develop specific primer sets for the rapid detection of TRV. Two RT-PCR primer sets were developed for specific detection of TRV. Furthermore, nested primer sets were also developed, which is required for high sensitivity detection in plant quarantine. The RT-PCR and nested PCR products had the following sizes: set 5 (1,096→540 bp), and set 7 (878→756 bp), respectively. In addition, a modified positive-control plasmid was also developed for use as a positive control in TRV quarantine. The diagnostic system for TRV detection was verified using samples from Korean quarantine sites for the last five years (2009–2014). A total of 83 cases were detected among various import crops. This system for detection of TRV will continuously contribute to plant quarantine in the future.

REFERENCES

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Figure 1.
Map of primer design for detection of TRV
jbv-45-54f1.tif
Figure 2.
Results of selection of TRV RT-PCR primer sets. Panel (A), First selection of specific RT-PCR primer sets for the detection of TRV. M, 100 bp step DNA Ladder maker (Genepia, Korea); dot, selected PCR primer set; Lane number, primer set for detection of TRV. Panel (B), Second selection of specific RT-PCR primer sets for the detection of TRV. Lane M, 100 bp step DNA Ladder maker (Genepia); lane AM, Alfalfa mosaic virus; lane Ar, Arabis mosaic virus; lane CM, Cucumber mosaic virus; lane Pe, Pepper mottle virus; lane PY, Potato virus Y; lane RM, Ribgrass mosaic virus; lane TG, Tobacco mild-green mosaic virus; lane TM, Tobacco mosaic virus; lane To, Tomato mosaic virus; lane TS, Tomato spotted wilt virus.
jbv-45-54f2.tif
Figure 3.
RT-PCR sensitivity test on the selective primer sets for TRV.
jbv-45-54f3.tif
Figure 4.
Result of selected RT-PCR and nested-PCR products for the detection of TRV. Lane M, 100 bp step DNA Ladder; lane 1, final selected primer set #5 (1,096 bp); lane 2, nested-PCR product from primer set #5 (543 bp); lane 3, final selected primer set #7 (880 bp); lane 4, nested-PCR product from primer set #7 (760 bp).
jbv-45-54f4.tif
Figure 5.
BamH I sequence insertion of the TRV genetically modified-positive control plasmids.
jbv-45-54f5.tif
Table 1.
RT-PCR amplification sets and product size for the detection of TRV
Set Forward primer (location) Reverse primer (location) Product size (bp)
1 TRV-N50 (6,233∼6,257) TRV-C10 (6,572∼6,593) 340
2 TRV-N40 (4,998∼5,021) TRV-C20 (5,246∼5,270) 273
3 TRV-N30 (4,540∼4,561) TRV-C20 (5,246∼5,270) 731
4 TRV-N30 (4,540∼4,561) TRV-C30 (4,995∼5,019) 480
5 TRV-N20 (2,782∼2,805) TRV-C40 (3,857∼3,877) 1,096
6 TRV-N10 (1,459∼1,481) TRV-C50 (2,459∼2,477) 1,019
7 TRV-N10 (1,459∼1,481) TRV-C60 (2,314∼2,338) 880
Table 2.
Final selection of RT-PCR and nested primer sets for the detection of TRV
Primer Sequence (5′→3′) Product size (bp)
Set 5 TRV-N20
TRV-C40
TR-N22
CGCGGTCGAAAGGATGAGTGATTA
TCCCGGAAACAAAGCGTCGTA
GTAAGTCGACAATGATTGTC
1,096
Nested primer of set 5 TR-C45 GAAGGAAAGTTATGTACTGAG 543
Set 7 TRV-N10
TRV-C60
TR-N11
GGCCGTGAAGAACAAGCAAAGTG
TTGTACCGCTTGTTTCCCCTCTT
GATTCTCGAGATTTACAGTTG
880
Nested primer of set 7 TR-C62 TGCTCCATGATCTCCTCATC 760
Table 3.
Results of detection for TRV from plant quarantine sites in 2009–2014
Item Year (number of detection) Total
2009 2010 2011 2012 2013 2014
Bulb (119 cases)
 Gladiolus 5 5
 Nectaroscordum 1 1
 Dahlia 1 1
 Leucocoryne 1 2 3
 Ranunculus 1 1
 Garlic 1 1
 Druce 1 1
 Poison 1 1
 Lily 1 1 2
 Narcissus 3 11 1 2 6 15 38
 Snowflake 1 1
 Anemone 1 2 4 8 15
 Amaryllis 1 1
 Iris 1 1
 Alium 1 12 5 18
 Alstromeria 1 1
 Ornithogalum 1 1
 Orange Daylily 1 1
 Calochortus 1 1
 Crocus 1 1 4 6
 Tulip 3 3
 Puschkinia 1 1
 Ornamental Plants Etc. 1 4 5
 Hemerocalis 1 1
 Hyacinth 5 1 3 9
Seed (16 cases)
 Hot pepper 3 3 6
 Iceland Poppy 1 1 2
 Tomato 1 1 1 3 6
 Paprika 1 1 2
Etc. (1 case)
 Shallot 1 1
Total 9 19 3 14 28 63 136
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