Symptom Expression and Virus Multiplication in Rhabdovirus-Infected Plants

Askeer, Fathi Ali (1993) Symptom Expression and Virus Multiplication in Rhabdovirus-Infected Plants. PhD thesis, University of Glasgow.

Abstract

Two plant rhabdoviruses Sonchus yellow net virus (SYNV) and eggplant mottled dwarf virus (EMDV) have been investigated in three hosts N. glutinosa, N. clevelandii and N. edwardsonii, a hybrid of the previous two. Particles of both viruses accumulated in the perinuclear space of infected cells. The symptoms of the two viruses were characterised by vein-clearing and yellowing in the case of SYNV, appearing after 2-3 weeks post-inoculation and in the case of EMDV, vein-clearing, yellowing and mottling of the leaves appearing after 3-4 weeks post-inoculation. Vein-clearing and yellowing symptoms of SYNV, eventually disappeared after 6 weeks post-inoculation and yellow mottled spots appeared in new leaves of all three hosts. These were accompanied by reduction in the numbers of virus particles observed in infected cells. In contrast, EMDV-infected plants continued to show severe symptoms. The severity of SYNV and EMDV symptoms depended to a great extent on the age of the plants at the time of inoculation. EMDV symptoms were much more severe than the symptoms of SYNV in three hosts studied. In this study, the appearance of the symptoms depended not only on the type of the virus but differed between two closely related hosts.

• Item Type: Thesis (PhD)
• Qualification Level: Doctoral
• Additional Information: Adviser: J J Milner
• Keywords: Plant sciences, Plant pathology
• Date of Award: 1993
• Depositing User: Enlighten Team
• Unique ID: glathesis:1993-74624
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 27 Sep 2019 17:30
• Last Modified: 27 Sep 2019 17:30
• URI: https://theses.gla.ac.uk/id/eprint/74624