Image Number: 1440040

Descriptor:
Symptoms
Description:
The initial symptom of PVY infection is vein clearing on newly developing leaves. The extent of the vein clearing is intermediate between that caused by TEV and TVMV. Leaves then develop a faint mottling and the characteristic vein banding: dark green bands along the veins with lighter green tissue adjacent. The pattern is more regular than that caused by TVMV. Veinlets and veins may become necrotic on plants infected with severe strains of PVY. This Virus is transmitted from vegetables and weeds to tobacco by migrating aphids.
Image type:
Field

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Image location:
United States

Subject

Kingdom: Viruses
Phylum: Viruses
Class: Single-stranded, positive-sense, RNA (Group IV)
Order: Unassigned single stranded positive-sense RNA viruses
Family: Potyviridae
Genus: Potyvirus
Subject: Potyvirus PVY

Host

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Solanales
Family: Solanaceae
Genus: Nicotiana
Subject: Nicotiana tabacum (burley type) L.
Node Affiliation:
Image uploaded:
Monday, January 1, 1990
Image last updated:
Tuesday, March 15, 2011