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- Title
Symptom development, in planta distribution, and transmission of Impatiens necrotic spot virus in gentian: evidence for survival in roots and winter buds.
- Authors
Nekoduka, S.; Sano, T.
- Abstract
Impatiens necrotic spot virus (INSV) causes serious damage to gentian (Gentiana spp.). Symptom development, in planta distribution, and transmission of INSV were studied after mechanical inoculation of gentian plants and propagation of shoot cuttings from infected stock plants. When young gentian plants at the 2nd-leaf stage were inoculated with INSV, plants developed systemic symptoms that were restricted to a few upper leaves. However, older plants at the 6th-leaf stage did not develop systemic symptoms. After plant inoculation, INSV was detected using DAS-ELISA in symptomatic upper leaves, and rootlets and winter buds, but not in asymptomatic leaves. When asymptomatic shoot cuttings from infected stock plants were vegetatively propagated in a thrips-free glasshouse, 44.4% of those obtained from the apical shoot and 20.6% of those obtained from the middle section of the plant developed systemic symptoms. These results indicated that when gentian plants were infected with INSV, the virus was preferentially transported from the infected leaves to the root and winter buds. However, even asymptomatic shoot cuttings may develop systemic symptoms when obtained from infected stock plants. Therefore, vegetative propagation from infected stock plants can be a source of INSV infection.
- Subjects
PLANT viruses; PLANT species; FRANKLINIELLA occidentalis; VIRUSES; FRANKLINIELLA
- Publication
Journal of General Plant Pathology, 2018, Vol 84, Issue 4, p279
- ISSN
1345-2630
- Publication type
Article
- DOI
10.1007/s10327-018-0785-4