Alternaria
Alternaria/Scientific names
What type of fungus is Alternaria?
Alternaria is a genus of Deuteromycetes fungi. Alternaria species are known as major plant pathogens. They are also common allergens in humans, growing indoors and causing hay fever or hypersensitivity reactions that sometimes lead to asthma.
Is Alternaria a parasitic fungi?
SUMMARY Alternaria species are mainly saprophytic fungi. However, some species have acquired pathogenic capacities collectively causing disease over a broad host range. Furthermore, strategies employed by potential host plants in order to ward off an attack are discussed.
Is Alternaria Septate or non Septate?
Species of Alternaria occur worldwide on many foods and plant materials. They have septate hyphae and appear to be dark, gray-green in color, and almost black on the reverse side of colonies growing on agar.
What is use of Alternaria crassa?
An isolate of Alternaria crassa (Saac.) Rands was obtained from a naturally occurring leaf-spotting disease of Jimsonweed (Datura stramonium L.) plants. crassa has potential as a biological herbicide for controlling Jimsonweed.
What class is Penicillium in?
Eurotiomycetes
Penicillium/Class
What type of conidia is in Alternaria?
Large, dark muriform conidia in chains Alternaria is a large genus composed mostly of saprobic or plant pathogen species. Infections caused by Alternaria species, and cited primarily as A.
What are Aseptate hyphae?
Non-septate hyphae, also known as aseptate or coenocytic hyphae, form one long cell with many nuclei. They are the more primitive form of hyphae; species with septate hyphae diverged from a common ancestor with coenocytic hyphae. Most fungi with coenocytic hyphae belong to the class Zygomycetes.
How many species are there in the genus Alternaria?
Simmons (1992) organized the genus Alternaria into 14 species-groups based on characteristics of conidia and chain formation. The A. infectoria species-group comprises nine known species and an unknown number of distinct taxa yet to be described.
What are the taxa of Alternaria infectoria?
Different taxa in the species-group of Alternaria infectoria (teleomorph Lewia spp.) are often isolated from various cereals including barley, maize and wheat grain, ornamental plants and skin lesions from animals and humans.
How do you test for Alternaria infectoria?
Conidia of Alternaria infectoria species group isolates from Triticum aestivum (400x) Pathogenicity tests were carried out in Petri dishes following two standard methods: blotter test and agar test (PDA 2%), inoculating wheat seeds with a conidial suspension (2×10 5 conidia/ml) of 20 selected isolates.
What is the prevalence of Alternaria spp on potato carrot agar?
Seed analysis by blotter and agar tests (Neergaard, 1979) showed up to 55% of prevalence (number of samples infected over the total) of Alternaria spp. and a mean natural infection of 37%. Morpho-cultural studies were carried out on potato carrot agar (PCA).
