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Molecular Ecology and Emergence of Tropical Plant Viruses
- Source :
- Annual Review of Phytopathology
- Publication Year :
- 2006
- Publisher :
- Annual Reviews, 2006.
-
Abstract
- Abstract An appreciation of the risks caused by emergent plant viruses is critical in tropical areas that rely heavily on agriculture for subsistence and rural livelihood. Molecular ecology, within 10 years, has unraveled the factors responsible for the emergence of several of the economically most important tropical plant viruses: Rice yellow mottle virus (RYMV), Cassava mosaic geminiviruses (CMGs), Maize streak virus (MSV), and Banana streak virus (BSV). A large range of mechanisms—most unsuspected until recently—were involved: recombination and synergism between virus species, new vector biotypes, genome integration of the virus, host adaptation, and long-distance dispersal. A complex chain of molecular and ecological events resulted in novel virus-vector-plant-environment interactions that led to virus emergence. It invariably involved a major agricultural change: crop introduction, cultural intensification, germplasm movement, and new genotypes. A current challenge is now to complement the analysis of the causes by an assessment of the risks of emergence. Recent attempts to assess the risks of emergence of virulent virus strains are described.
- Subjects :
- Manihot
viruses
Agriculture intensive
Plant Science
Risque
Plant Viruses
rice yellow mottle virus
African cassava mosaic virus
Germplasm
Banana streak virus
Maize streak virus
Ecology
food and beverages
DNA virus
Virus mosaïque manioc
Plants
Épidémiologie
Introduction de plantes
Caulimoviridae
resistance durability
Zone tropicale
Intéraction génotype environnement
Rice yellow mottle virus
tropical agriculture
Biology
Zea mays
Plant virus
Botany
Transmission des maladies
Ecosystem
H20 - Maladies des plantes
Cassava mosaic geminiviruses
Tropical Climate
Begomovirus
Biologie moléculaire
Oryza
Musa
Distribution spatiale
Virus des végétaux
Résistance aux maladies
biology.organism_classification
Subjects
Details
- ISSN :
- 15452107 and 00664286
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- Annual Review of Phytopathology
- Accession number :
- edsair.doi.dedup.....be4054d170d22527ca3f444ea0464f0d