Geminivirus Isolation and DNA Extraction
-
Last Update: 2021-01-13
-
Source: Internet
-
Author: User
Search more information of high quality chemicals, good prices and reliable suppliers, visit
www.echemi.com
Geminiviruses, named for their unique geminate capsid morphology, have small single-stranded (ss) circular
DNA
genomes that replicate in the nuclei of infected cells via a double stranded (ds) DNA intermediate. They are responsible for economically devastating diseases in a wide variety of crop species from cereals to legumes; it is thus important to gain a better understanding of their epidemiology, genetic diversity, and molecular mechanisms of replication and pathogenicity, for the design of effective resistance strategies (for reviews,
seerefs.1
and
2
). Each geminate particle encapsidates a circular single stranded genomic component of between 2.5 and 3 kb. Viruses in the taxonomic family
Geminiviridae
are classified into three genera (Mastrevirus, Curtovirus, Begomovirus), based on their host range, genome organization, and vector species (
3
,
4
). Mastreviruses, such as maize streak virus (MSV) and wheat dwarf virus (WDV), have monopartite genomes, are transmitted by leaf-hopper species, and, with a few exceptions, infect monocotyledonous plants. Begomoviruses, such as bean and tomato golden mosaic viruses (BGMV and TGMV), are transmitted by whiteflies (
Bemisia tabacci
) and all infect dicotyledonous plants; most have bipartite genomes, although there are some viruses in this group that apparently have monopartite genomes. Curtoviruses, such as beet curly top and tomato pseudo curly top viruses (BCTV and TPCTV), occupy an intermediate position between Mastreviruses and Begomoviruses, in that these viruses have monopartite genomes and are transmitted by leafhopper species, but only infect dicotyledonous hosts.
This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only.
This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of
the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed
description of the concern or complaint, to
service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content
will be removed immediately.