Closterovirus
Encyclopedia
Closterovirus, also known as beet yellows viral group, is a plant
-infecting viral genus included in family Closteroviridae
. This genus has a probably worldwide distribution and includes among other viral species the Beet yellows virus
and the tentatively assigned Citrus tristeza virus
, rather economically important plant diseases. At least some species require vectors such as aphid
s or mealybug
s for their transmission from plant to plant.
in the 3'UTR. These secondary structures have been found to be important in viral RNA replication.
Plant
Plants are living organisms belonging to the kingdom Plantae. Precise definitions of the kingdom vary, but as the term is used here, plants include familiar organisms such as trees, flowers, herbs, bushes, grasses, vines, ferns, mosses, and green algae. The group is also called green plants or...
-infecting viral genus included in family Closteroviridae
Closteroviridae
The Closteroviridae are a family of viruses plant viruses with filamentous, helically constructed particles showing distinct cross-banding and varying in length from 650 nanometers to over 2000 nm. The genome is a single strand of positive sense RNA whose size varies from 13 - 19...
. This genus has a probably worldwide distribution and includes among other viral species the Beet yellows virus
Beet yellows virus
Beet yellows virus is a plant pathogenic virus of the family Closteroviridae. Beet yellows virus is transmitted by multiple species of aphid and causes a yellowing disease in Beta vulgaris and Spinacia oleracea.-External links:**...
and the tentatively assigned Citrus tristeza virus
Citrus tristeza virus
Citrus tristeza virus is a viral species of the Closterovirus genus that causes the most economically damaging disease to its namesake plant genus, Citrus. The disease has led to the death of millions of Citrus trees all over the world and has rendered other millions useless for production...
, rather economically important plant diseases. At least some species require vectors such as aphid
Aphid
Aphids, also known as plant lice and in Britain and the Commonwealth as greenflies, blackflies or whiteflies, are small sap sucking insects, and members of the superfamily Aphidoidea. Aphids are among the most destructive insect pests on cultivated plants in temperate regions...
s or mealybug
Mealybug
Mealybugs are insects in the family Pseudococcidae, unarmored scale insects found in moist, warm climates. They are considered pests as they feed on plant juices of greenhouse plants, house plants and subtropical trees and also acts as a vector for several plant diseases.-Distribution:Mealybugs...
s for their transmission from plant to plant.
RNA pseudoknot
The viral RNA molecules of some members of this genus contain four hair-pin structures and a pseudoknotPseudoknot
A pseudoknot is a nucleic acid secondary structure containing at least two stem-loop structures in which half of one stem is intercalated between the two halves of another stem. The pseudoknot was first recognized in the turnip yellow mosaic virus in 1982...
in the 3'UTR. These secondary structures have been found to be important in viral RNA replication.