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Iris Yellow Spot Tospovirus Detected in Onion (Allium cepa) in Israel.
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During March 1997, 20 to 30% of field-grown onion (Allium cepa), observed in Bet Shean Valley, Israel, had unusual viral symptoms of straw-colored ringspots on leaves and flower stalks. Leaf samples were analyzed by transmission electron microscopy (EM) of leaf dip preparations. Typical
First Report of Iris yellow spot virus on Onion (Allium cepa) in Serbia.
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Iris yellow spot virus (IYSV; genus Tospovirus, family Bunyaviridae) is established in several European countries (France, Italy, The Netherlands, Poland, Slovenia, Spain, and the UK) and its distribution in the EU region has increased since 2002 (3). In July 2007, symptoms resembling those of IYSV
Occurrence of iris yellow spot virus from onion crops in Egypt.
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Iris yellow spot virus (IYSV) is a infects onion bulb and seed crops in many countries including Egypt. Results of the mechanical inoculation reveled that, small chlorotic lesions and systemic necrosis were observed on both Nicotiana benthamiana and Datura stramonium after 10 days, while there were
Type-1 ribosome-inactivating protein from iris bulbs: a useful agronomic tool to engineer virus resistance?
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To study the in planta antiviral activity of a type-1 ribosome-inactivating protein from iris bulbs, called IRIP, Nicotiana tabacum cv. Samsun NN was transformed with the IRIP sequence expressed under the control of the 35S cauliflower mosaic virus promoter. Molecular analysis of the transgenic
Iris Yellow Spot Virus in Onion Bulb and Seed Crops in Washington.
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The geographic distribution of Iris yellow spot virus (IYSV, Genus Tospovirus, Family Bunyaviridae) in onion (Allium cepa L.) crops in the western United States has increased with the most recent report in Colorado (1,4). Furthermore, the incidence of IYSV has increased significantly in onion crops
Incidence and Distribution of Iris yellow spot virus on Onion in Serbia.
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In a survey to determine the presence and distribution of Iris yellow spot virus (IYSV) in greenhouse ornamentals and onion field crops in 14 districts of Serbia as well as on imported ornamental plants, 1,574 samples were collected and analyzed by double-antibody sandwich enzyme-linked
First Report of Iris yellow spot virus Infecting Onion in Bosnia and Herzegovina.
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In July 2012, a survey was conducted to determine the presence of tospoviruses in Bosnia and Herzegovina, symptoms resembling those caused by Iris yellow spot virus (IYSV; genus Tospovirus, family Bunyaviridae) were observed in an onion (Allium cepa) seed crop in the Gornji Karajzovci locality
Molecular and serological characterization of iris yellow spot virus, a new and distinct tospovirus species.
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ABSTRACT A new tospovirus was identified in iris cultivations in the Netherlands. Both serological comparisons and sequence determination of the S RNA demonstrate that this virus represents a new and distinct species, belonging to a separate serogroup, and for which the name iris yellow spot virus
The type-1 and type-2 ribosome-inactivating proteins from Iris confer transgenic tobacco plants local but not systemic protection against viruses.
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The antiviral activity of the type-2 ribosome-inactivating protein (RIP) IRAb from Iris was analyzed by expressing IRAb in tobacco (Nicotiana tabacum L. cv. Samsun NN) plants and challenging the transgenic plants with tobacco mosaic virus (TMV). Although constitutive expression of IRAb resulted in
The Identification of the Vector Species of Iris Yellow Spot Tospovirus Occurring on Onion in Brazil.
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In Brazil, tospoviruses have been reported in several horticultural and ornamental plants. In the northeast region of Brazil, a tospovirus has emerged as a devastating virus on onion cultures. Based on serology and the sequence of nucleocapsid (N) protein gene, this pathogen was identified as a
Identification and Incidence of Iris yellow spot virus, a New Pathogen in Onion and Leek in Greece.
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Iris yellow spot virus (IYSV; genus Tospovirus, family Bunyaviridae) is an emerging and serious pathogen affecting several Allium spp. worldwide (2). The virus causes straw-colored, chlorotic or necrotic lesions that coalesce, occasionally resulting in an extensive necrosis on onion (A. cepa L.)
Characterization of a Tospovirus Isolate of Iris Yellow Spot Virus Associated with a Disease in Onion Fields in Brazil.
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A tospovirus from onion causing a disease known as "sapeca" by growers in Brazil was characterized. Symptoms on onion consisted of numerous eyelike spots on the leaves and flower stalks resulting in flower abortion. Nicotiana benthamiana and N. rustica were the only systemic hosts
In vivo localization of iris yellow spot tospovirus (Bunyaviridae)-encoded proteins and identification of interacting regions of nucleocapsid and movement proteins.
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BACKGROUND
Localization and interaction studies of viral proteins provide important information about their replication in their host plants. Tospoviruses (Family Bunyaviridae) are economically important viruses affecting numerous field and horticultural crops. Iris yellow spot virus (IYSV), one of
Co-purification, co-imniunoprecipitation, and coordinate expression of acetyl-coenzyme A carboxylase activity, biotin carboxylase, and biotin carboxyl carrier protein of higher plants.
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Acetyl-CoA carboxylase (ACCase; EC 6.4.1.2) is a regulatory enzyme of fatty acid synthesis, and in some higher-plant plastids is a multi-subunit complex consisting of biotin carboxylase (BC), biotin-carboxyl carrier protein (BCCP), and carboxyl transferase (CT). We recently described a Nicotiana
Occurrence of Impatiens necrotic spot virus and Tomato spotted wilt virus on Potatoes in Iran.
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There have been an increasing number of records of the natural infection of various crops and ornamentals in Iran with Impatiens necrotic spot virus (INSV), Tomato spotted wilt virus (TSWV), and Tomato yellow fruit ring virus (TYFRV), a recently proposed species in the genus Topovirus (3). TYFRV,
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