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Descripción
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| Although vertical transmission from parents to offspring through seeds is an important fitness component of many plant viruses, very little is known about the factors affecting this process. Viruses reach the seed by direct invasion of the embryo and/or by infection of the ovules or the pollen. Thus, it can be expected that the efficiency of seed transmission would be determined by (i) virus within-host multiplication and movement, (ii) the ability of the virus to invade gametic tissues, (iii) plant seed production upon infection, and (iv) seed survival in the presence of the virus. However, these predictions have seldom been experimentally tested. To address this question, we challenged 18 Arabidopsis thaliana accessions with Turnip mosaic virus and Cucumber mosaic virus. Using these plant-virus interactions, we ana- lyzed the relationship between the effect of virus infection on rosette and inflores- cence weights; short-, medium-, and long-term seed survival; virulence; the number of seeds produced per plant; virus within-host speed of movement; virus accumula- tion in the rosette and inflorescence; and efficiency of seed transmission measured as a percentage and as the total number of infected seeds. Our results indicate that the best estimators of percent seed transmission are the within-host speed of move- ment and multiplication in the inflorescence. Together with these two infection traits, virulence and the number of seeds produced per infected plant were also as- sociated with the number of infected seeds. Our results provide support for theoreti- cal predictions and contribute to an understanding of the determinants of a process central to plant-virus interactions. | |
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Internacional
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JCR del ISI
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Título de la revista
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Journal of Virology |
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ISSN
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0022-538X |
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Factor de impacto JCR
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4,501 |
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Información de impacto
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Volumen
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93 |
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DOI
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Número de revista
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Desde la página
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e01078-19 |
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Hasta la página
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e01078-19 |
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Mes
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SIN MES |
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Ranking
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