Chrysanthemum stunt viroid

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symptoms of Chrysanthemum stunt viroid infection on chrysanthemum plants, healty plant in middle (click on image to enlarge it)
Author(s): J. Dunez
Source: IPM Images

Chrysanthemum stunt viroid (CSVd)

The viroid infects various, mainly ornamental plants, causing light green young leaves, chlorotic spots, stunting, small leaves and flowers, and decreased rooting ability. Host plants include, for example, chrysanthemums, Dahlia, Argyranthemum and Petunia. Flower production and quality is significantly reduced in infected plants.

Although the disease has been first described from North America, the viroid is now widely distributed in other regions. Transmission is possible mechanically by tools and also through seeds. The circular RNA molecule contains around 355 nucleotides and has a rod-shaped secondary structure.

Vernacular names
• Deutsch: Stauche der Chrysanthemen
• English: CSVd
Chrysanthemum stunt viroid
• Français: viroïde nanifiant du chrysanthème
viroïde du rabougrissement du chrysanthème

For a review see Cho et al., 2013.

Secondary structure of Chrysanthemum stunt viroid, the central conserved region is indicated by light-red shading and the terminal conserved region is indicated by light-blue shading (click on image to enlarge it)
Author(s): Won Kyong Cho, Yeonhwa Jo, Kyoung-Min Jo and Kook-Hyung Kim
Source: Viruses (2013) 5, p.1102