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Jeonggu Sim
Louisiana State University
6Publications
5H-index
202Citations
Publications 6
Newest
#1Jeonggu SimH-Index: 5
#2Rodrigo A. ValverdeH-Index: 20
Last.Se-Chul ChunH-Index: 3
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Studies with the transmission electron microscope were used to detect and attempt to identify viruses infecting sweetpotato (Ipomoea batatas) and other Ipomoea species. Flexuous-rods, short curved-rods, and spherical virus-like particles were observed in cells of symptomatic plants. Also, various cytopathic changes such as crystals, vesicles, fibril structures, and cylindrical inclusions were observed. The present study showed that some of these cytopathic changes were associated with some viral...
#1Rodrigo A. Valverde (LSU: Louisiana State University)H-Index: 20
#2Jeonggu Sim (LSU: Louisiana State University)H-Index: 5
Last.Pongtharin Lotrakul (Chula: Chulalongkorn University)H-Index: 13
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Abstract Three genera of plant viruses, Begomovirus (Geminiviridae), Crinivirus (Closteroviridae) and Ipomovirus (Potyviridae), contain members that infect sweet potato (Ipomoea batatas) and are transmitted by whiteflies. The begomoviruses, Sweet potato leaf curl virus (SPLCV) and Ipomoea leaf curl virus (ILCV), and the ipomovirus Sweet potato mild mottle virus are transmitted by Bemisia tabaci, the sweet potato whitefly. The crinivirus, Sweet potato chlorotic stunt virus (SPCSV), is transmitted...
#1E. R. SoutoH-Index: 1
#2Jeonggu SimH-Index: 5
Last.C. A. ClarkH-Index: 1
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Souto, E. R., Sim, J., Chen, J., Valverde, R. A., and Clark, C. A. 2003. Properties of strains of Sweet potato feathery mottle virus and two newly recognized potyviruses infecting sweet potato in the United States. Plant Dis. 87:1226-1232. Some biological and molecular properties of six potyvirus isolates (LSU-1, -2, -3, and -5; 95-2; and 95-6) from sweet potato (Ipomoea batatas) were evaluated. Isolates LSU-1 and -3 and 95-2 were transmitted by Aphis gossypii and Myzus persicae while LSU-2 and ...
#1Jeonggu SimH-Index: 5
#2R. A. ValverdeH-Index: 1
Last.C. A. ClarkH-Index: 1
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The genus Crinivirus of the plant virus family Closteroviridae include members that are bipartite and whitefly-transmitted (2). The Crinivirus, Sweetpotato chlorotic stunt virus (SPCSV), was described from sweetpotato (Ipomoea batatas) in Nigeria (1). Vector transmission studies of SPCSV were conducted using two whitefly species, the sweetpotato whitefly (Bemisia tabaci biotype B) and the bandedwinged whitefly (Trialeurodes abutilonea). Whitefly colonies were reared in the laboratory on cotton p...
#1Pongtharin LotrakulH-Index: 13
#2Rodrigo A. ValverdeH-Index: 20
Last.Alvaro GomezH-Index: 1
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ABSTRACT A viral disease causing severe leaf malformation and yellow mottle on Tabasco (Capsicum frutescens) and Habanero (C. chinense) pepper plants was observed in 1997 on farms in southwestern Costa Rica. Whiteflies (Bemisia tabaci) were present on affected farms and transmitted the putative virus. Total DNA was extracted from a whitefly-transmitted isolate, and polymerase chain reaction (PCR) was performed using degenerate primers. The expected PCR product (550 bp) was obtained, suggesting t...
#1Pongtharin LotrakulH-Index: 13
#2Rodrigo A. ValverdeH-Index: 20
Last.R. De La TorreH-Index: 1
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ABSTRACT In 1994, a sweet potato sample showing leaf curl symptoms was collected from the field in Louisiana. When graft-inoculated, Ipomoea nil cv. Scarlett O'Hara reacted with severe leaf distortion and chlorosis symptoms. I. aquatica reacted with a bright yellow mottle. The virus isolated was designated the United States isolate of sweet potato leaf curl virus (SPLCV-US). It was transmitted to I. nil by the sweet potato whitefly, Bemisia tabaci biotype B. DNA probes prepared with component A ...
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