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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Morra, M. R. Petty, I. T. |
| Description | Country affiliation: United States Author Affiliation: Morra MR ( Department of Microbiology, North Carolina State University, Box 7615, Raleigh, North Carolina 27695-7615, USA.) |
| Abstract | The types of cells and tissues infected by a virus define its tissue tropism. Determinants of tissue tropism in animal-infecting viruses have been extensively investigated, but little is known about plant viruses in this regard. Some geminiviruses in the genus Begomovirus exhibit phloem limitation and are restricted to cells of the vascular system, whereas others can invade mesophyll tissue. To identify viral genetic determinants of tissue tropism, we established a model system using two begomoviruses and their common host plant, Nicotiana benthamiana. Analysis by DNA in situ hybridization confirmed that tomato golden mosaic virus invades mesophyll tissues in systemically infected leaves, whereas bean golden mosaic virus remains phloem limited. Through genetic complementation and analysis of recombinant hybrid viruses, we demonstrated that three genetic elements of tomato golden mosaic virus determine its mesophyll tissue tropism. A noncoding region of the viral genome is essential for the phenotype, but it must be accompanied by one of two different coding regions. To our knowledge, this is the first example documented in a plant virus of noncoding DNA sequences that determine tissue tropism. |
| File Format | HTM / HTML |
| ISSN | 10404651 |
| e-ISSN | 1531298X |
| Journal | THE PLANT CELL ONLINE |
| Issue Number | 11 |
| Volume Number | 12 |
| Language | English |
| Publisher | American Society of Plant Biologists |
| Publisher Date | 2000-11-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Botany Geminiviridae Physiology Plants, Toxic Tobacco Virology Dna, Viral Genetics In Situ Hybridization Cytology Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, P.h.s. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Plant Science |
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