A
ProMED-mail post
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International Society for Infectious Diseases
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Date: 5 Jul 2007
Source: Journal of Phytopathology [edited]
<http://www.blackwell-synergy.com/doi/abs/10.1111/j.1439-0434.2007.01234.x?journalCode=jph>
[Reference:
J Heydarnejad, E Hosseini Abhari, HR Bolok Yazdi, H Massumi
(2007):
Curly top of cultivated plants and weeds and report of a
unique curtovirus from Iran.
Journal of Phytopathology 155 (6), 321-5.
doi:10.1111/j.1439-0434.2007.01234.x]
The incidence of curly top disease on cultivated plants and
weeds was investigated in Kerman Province (southeastern Iran)
from October 2003 to November 2004. A total of 1186 samples were
collected in fields of sugar beet and other crops as well as
within commercial plastic houses.
Curtovirus infection of 4 field crops, 3 vegetables, and 11
weeds was verified by indirect enzyme-linked immunosorbent assay
(ELISA) using a polyclonal antibody.
An undescribed curtovirus, tentatively designated Iranian beet
curly top virus (IBCTV), was isolated from 3 symptomatic beet
samples collected randomly in widely separated regions of
south-eastern, southern, and central Iran and used for molecular
studies.
A 672 bp segment of the coat protein (CP) gene of each isolate
was amplified by polymerase chain reaction (PCR) and sequenced.
The results showed that the 3 isolates shared 98.5-98.7 percent
nucleotide homology with each other but only 72.1-76.5 percent
with other members of the genus _Curtovirus_. IBCTV was also
detected by PCR using specific primers in other samples of sugar
beet, tomato, spinach, turnip, and several weed species
collected in different parts of Iran. These results indicated
that IBCTV is the dominant curtovirus in Iran.
Links
1. Sunter, G. et al (2004): Spinach curly top virus: a newly
described _Curtovirus_ species from Southwest Texas with
incongruent gene phylogenies. Phytopathology 94, 772-9.
<http://www.cababstractsplus.org/google/abstract.asp?AcNo=20043119126>
2. Wintermantel, W.M. (2004). Sequence variability and host
specificity among curtoviruses infecting weed and crop hosts in
California. Phytopathology 94, 111 <http://www.ars.usda.gov/research/publications/publications.htm?SEQ_NO_115=168230>
--
Communicated by:
Dick Hamilton
Former ProMED-mail plant disease moderator
<rihamilto@shaw.ca>
[Virus species in the genus _Curtovirus_ (family
_Geminiviridae_) are transmitted by insects (for example
leafhoppers or whiteflies) and grafting. They often have a wide
host range including crop and weed species, which may serve as
reservoirs for both the pathogens and vectors. Disease
management includes vector control and the use of resistant crop
cultivars if available.
Map of Iran
<http://worldatlas.com/webimage/countrys/asia/lgcolor/ircolor.htm>
Pictures
Beet curly top symptoms:
<http://pdc.unl.edu/sugarbeet/CurlyTop/images/Curly%20Top%20main.jpg>
Electron micrograph of _Curtovirus_ particles:
<http://www.dpvweb.net/notes/showem.php?genus=Curtovirus>
Links
Genus _Curtovirus_ taxonomy:
<http://www.dpvweb.net/notes/showgenus.php?genus=Curtovirus>
_Beet curly top virus_ taxonomy:
<http://image.fs.uidaho.edu/vide/descr081.htm>.
- Mod.DHA]
[see also in the
archive:
1999
----
Curly top disease, chili peppers - USA (New Mexico)
19990707.1132] |
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