Authors:Anett Harsányi, Béla Böddi, Károly Bóka, and Richard Gáborjányi
The effect of
Barley stripe mosaic virus
(BSMV) infection was studied on the ultrastructure of etioplasts and the greening process of barley (
cv. Pannónia) plants infected by seed transmission. The leaves of 7–11-day old etiolated seedlings were examined with transmission electron microscopy 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. 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 significantly delays or inhibits the plastid development and the formation of photosynthetic apparatus.
The complete genome of Hosta Virus X (HVX), which is thought to be a distinct species of Potexvirus, was sequenced. Nucleotide sequences of HVX were compared with those of other members of the genus Potexvirus and phylogenetic tree was constructed. The range of identities of viral replicase open reading frame 1 (ORF1) between HVX and other potexviruses were 43.1%–55.1% and 35.9%–46.6% at the nucleotide and amino acid levels, respectively. Phylogenetic analysis was performed according to the amino acid sequence of the replicase to determine the position of HVX in the genus Potexvirus. Results from the phylogenetic analysis demonstrated that HVX was in the same group as Cassava common mosaic virus (CsCMV), Plantago asiatica mosaic virus (PlAMV), Tulip virus X (TVX), and Hydrangea ring spot virus (HdRSV). In particular, coat protein (CP) sequences among viruses from different Hosta cultivars were revealed to be less variable than those from different isolates of Potato virus X (PVX), a Potexvirus type species. In the present study, HVX was transmissible by seeds of the Hosta “Blue Cadet” cultivar. Moreover, HVX was detected in the embryo but not in the seed coat or endosperm of the seed.
Authors:Tünde Pusztahelyi, L. Radócz, Cs. Gellért, Szilvia Kovács, Zsuzsanna Szabó, I. Pócsi, and A. Vad
infection and seedtransmission on maize under field conditions . Agric. Biol. J. North Am. , 4 , 583 – 589 . doi 10.5251/abjna.2013.4.6.583.589
Bartlett , D. W. , Clough , J. M. , Godwin , J. R. , Hall , A. A. , Hamer , M. and Parr
Authors:E. Kiss, G. Kazinczi, J. Horváth, S. Kobza, T. Baranyi, M. Varga, B. Havasréti, and A. Fehér
Gleason, M. L. and Provvidenti, R. (1990): Absence of seedtransmission of zucchini yellow mosaic virus from seed of pumpkin. Plant Dis. 74, 828.
Absence of seedtransmission of zucchini yellow mosaic virus from seed of pumpkin