Abnormal etioplast development in barley seedlings infected with BSMV by seed transmission |
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Authors: | Harsányi Anett Böddi Béla Bóka Károly Almási Asztéria Gáborjányi Richard |
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Institution: | Plant Protection Institute, Hungarian Academy of Sciences, Herman Ottóstreet 15, Budapest, H-1022, Hungary;Department of Plant Anatomy, Eötvös Loránd University of Sciences, Puskin street 11–13, Budapest, H-1088, Hungary;Department of Plant Pathology and Plant Virology, Georgikon Faculty of Agriculture, Veszprém University, Deák street 16, Keszthely, H-8360, Hungary |
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Abstract: | The effect of barley stripe mosaic hordeivirus (BSMV) was studied on the ultrastructure of etioplasts, protochlorophyllide forms and the greening process of barley ( Hordeum vulgare cv. Pannónia) plants infected by seed transmission. The leaves of 7- to 11-day-old etiolated seedlings were examined by transmission electron microscopy, fluorescence and absorption spectroscopy. The etioplasts of infected seedlings contained smaller prolamellar bodies with less regular membrane structure, while prothylakoid content was higher than in the control. The protochlorophyllide content of virus-infected seedlings was reduced to 74% of the control. In the 77 K fluorescence spectra the relative amount of 655 nm emitting photoactive protochlorophyllide form decreased, and the amount of the 645 and 633 nm emitting forms increased in the infected leaves. A characteristic effect was observed in the process of the Shibata-shift: 40 min delay was observed in the infected leaves. The results of this work proved that BSMV infection delays or inhibits plastid development and the formation of photosynthetic apparatus. |
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