Ultraviolet light has been shown to be essential for spore formation in alternaria species. Please see the alternaria primer summary if you want more general information. Jun 30, 2015 tomatoes are highly susceptible to fungal decay because of their thin skin and soft tissue, and alternaria is the main fungus responsible for spoilage. The reproductive structures, which characterize this species and aid in the organisms dispersal, include multicellular conidia and septate hyphae. Este hongo lo podemos encontrar en tomate, trigo, papaya, entre otros. Detection of aerosolized alternaria alternata conidia, hyphae. New report of alternaria alternata causing leaf blight of. Initial symptoms are small, dark, shallow, circular lesions that can occur anywhere on the fruit surface. Causa tambem infeccoes do trato respiratorio superior em doentes com sida, asma em pessoas com sensibilidade, e tem sido implicada na rinossinusite cronica. Jul 30, 2004 alternaria alternata has previously been reported in pakistan as a saprophytic pathogen of tomato causing post harvest losses in high frequency akhtar et al. Alternaria alternata an overview sciencedirect topics.
In this study, a pcr method based on oligonucleotide primers targeting the alt a 1 gene has been developed for the rapid detection of dna from alternaria spp. They are also common allergens in humans, growing indoors and causing hay fever or hypersensitivity reactions that sometimes lead to asthma. Opportunistic infections in immunocompromised hosts, including in skin, paranasal sinuses and lungs. A polyphasic approach based on morphological features, phylogeny and toxin profiles could be the key to a correct. Alternaria toxins in feed and food european food safety. A sensitive twosite enzymelinked immunosorbent assay for measurement of the major alternaria alternata allergen alt a 1.
The genus alternaria includes both plantpathogenic and saprophytic species, which may affect crops in the field or cause harvest and postharvest decay of plant products. Alternaria alternata has previously been reported in pakistan as a saprophytic pathogen of tomato causing post harvest losses in high frequency akhtar et al. In the laboratory he found alternaria species in all samples, and then ran more tests to characterize their morphology physical form, genetic diversity and immunological properties. In addition to causing plant diseases on many crops such as cereals, oilseeds, tomatoes, apples and olives, some of these toxins are. Tomatoes are highly susceptible to fungal decay because of their thin skin and soft tissue, and alternaria is the main fungus responsible for spoilage. First report of alternaria alternata causing leaf spot of polyalthia longifolia in pakistan. Therefore, under greenhouse growing conditions, the use of ultraviolet lightabsorbing film can greatly reduce the incidence of some alternaria diseases. Studies have shown that up to 70 % of moldallergic patients have skin test reactivity to alternaria. The taxonomy of the genus alternaria is not welldefined yet. Alternaria alternata is a fungus which has been recorded causing leaf spot and other diseases. The lesions can extend into the flesh, the leading edge of which is white while the older portion of the lesion is dark. Alternaria citri aparece con mas frecuencia en limones, navels y marisoles, etc. Alternaria alternata is a fungus that can infect fruits mainly via wounds, or natural openings, therefore control of alternaria rot depends on careful handling during picking, washing, and packing to prevent physiological diseases and injuries that open the way for infection. Most of the isolates were or were closely related to two alternaria species, a.
Finally, there are a number of fungicides that have activity against alternaria fungi. Pdf pathogenicity of alternariaspecies on potatoes and. Alternaria alternata is one of the fungal species referred to as leaf fungi phylloplane. Isolation and expression of a cdna clone encoding an alternaria alternata alt a 1 subunit.
It has a worldwide distribution and is frequently isolated from a wide range of plants, soil, food, and indoor air. Production and nature of a host specific toxin from alternaria alternata f. Alternaria alternata caused little disease on the breeding line 242412 p 0. Alternaria alternata is a fungus which has been recorded causing leaf spot and other diseases on over 380 host species of plant. Alternaria alternata is able to produce the following diseases. Mar 20, 2006 in the laboratory he found alternaria species in all samples, and then ran more tests to characterize their morphology physical form, genetic diversity and immunological properties. Alternaria alternata has a wide host range, causing leaf spots and blights on many plant parts. It is an opportunistic pathogen on numerous hosts causing leaf spots, rots and blights on many plant parts. Alternaria species are known as major plant pathogens.
Pcr detection and identification of alternaria speciesgroups. In indoor environments, alternaria alternata has been isolated from dust on floors, carpet and mattresses. This disease summary will discuss the affects alternaria alternata has on papaya fruit. Allergic respiratory disease, including thunderstorm asthma and safs. Certains champignons du genre alternaria comme dautres du genre phialophora. It has also been shown that prolonged heavy exposure to a.
339 1458 1471 351 546 1236 1405 1100 97 409 1192 598 1034 770 458 385 424 1145 166 85 679 1545 1425 1075 1145 1307 1151 1285 1543 773 863 48 1019 989 1419 1199 1145 853 288