'Narcissus white streak virus'' (NWSV) is a
plant pathogen
Plant pathology (also phytopathology) is the scientific study of diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). Organisms that cause infectious disease include fungi, oomyc ...
of the family
Potyviridae which infects plants of the genus ''
Narcissus
Narcissus may refer to:
Biology
* ''Narcissus'' (plant), a genus containing daffodils and others
People
* Narcissus (mythology), Greek mythological character
* Narcissus (wrestler) (2nd century), assassin of the Roman emperor Commodus
* Tiberiu ...
'', and is transmitted by
aphids.
[ It is among the commonest and most serious of the viral infections that infect narcissi, but appears to be confined to '']N. tazetta
''Narcissus tazetta'' (paperwhite, bunch-flowered narcissus, bunch-flowered daffodil, Chinese sacred lily, cream narcissus, joss flower, polyanthus narcissus) is a perennial ornamental plant that grows from a bulb. Cultivars of ''N. tazetta'' in ...
''.
Description
This virus causes narrow greenish-purple streaks that turn white to yellow, on the leaves and flower stalk after flowering, and premature senescence, which reduces bulb size and yields.["Narcissus (''Narcissus'' spp.)". UC Pest Management Guidelines. Agriculture and Natural Resources, University of California. Integrated pest management program. March 2009.]
/ref>
Taxonomy
Despite its importance, there is relatively little phylogenetic information on NWSV and its taxonomy remains unresolved. It has been proposed as a tentative member of the genus ''Potyvirus
''Potyvirus'' is a genus of positive-strand RNA viruses in the family ''Potyviridae''. Plants serve as natural hosts. The genus is named after member virus ''potato virus Y''. Potyviruses account for about thirty percent of the currently known ...
'', but never formally accepted.
References
Bibliography
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Viral plant pathogens and diseases
Potyviridae
{{Virus-plant-disease-stub