Can someone explain to me how to distinguish Alternaria from Ulocladium by morphological characteristics?
This two genera have different spores. So You just need to do some microscopic slide. There You have some pages with characteristic and fotos.
http://www.doctorfungus.org/thefungi/alternaria.php
http://www.doctorfungus.org/thefungi/Ulocladium.php
http://www.mycobank.org/BioloMICS.aspx?Link=T&TableKey=14682616000000067&Rec=900&Fields=All
http://www.mycobank.org/Biolomics.aspx?Table=Mycobank&MycoBankNr_=163248
Hi,
These genera have different Conidia, In Alternaria, Conidia are commonly catenate, mostly obclavate often with beak, but in Ulocladium, Conidia are mostly solitary, ellipsoid, without beak.
Best,
Amir
ALTERNARIA: Conidiophores, simple, bearing a simple or branched chain of conidia. Conia dark, both cross and longitudinal septa, having a shape of club in reverse (obclavate). No zigzag conidiophores.
ULOCLADIUM: conidiophores zigzag bearing single conidia, ovoid to elliptical, with cross and longitudinal septa.
Note: Alternaria conidia are club shaped and in chains. But Ulocladium conidia are simple, not in chains, ovoid to elliptical. MAKE A SLIDE CULTURE AND EXAMINE in situ FOR CONIDIA IN CHAIN OR NOT. SEARCH NET .
Ulocladium does make chains sometimes. See Ulocladium chartarum (chains of 6 conidia or more. The zigzag thing though seems like a good tip. I hadn't realized that.
Runa et al 2009
In Alternaria in some species conidia are rostrate (see in A.pori) while in Ulocladium such features are not found. Another specific conidial architectural features in U.atrum and U.tuberculatum the conidia are cruciately septate while in Alternaria such specific featutres are not found.
Alternaria can usually be distinguished from Ulocladium by its obclavate conidia with a beak at the apex. Its conidiophores are comparatively less geniculate than those of Ulocladium, and its conidia are typically in chains, while those of Ulocladium are mostly formed singly or only in very short chains.
St-Germain & Summerbell, 1996
Hello my friends.. are SPP's (surface plasmon polariton) without apply light? if yes: Is it moving along the x axis? and How is light coupled to SPP's with a frequency equal to plasma frequency?
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