Alternaria (anamorphic genus)

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Alternaria - A to D) disease symptoms: A. dauci on carrots, A. linariae on tomato, A. neoipomoeae on sweet potato, A. solani on potato - E to O) conidiophores: A. caricis (E), A. chartarum (F), A. cinerariae (G), A. conjuncta (H), A. elegans (I), A. embellisia (J), A. indefessa (K), A. japonica (L), A. penicillata (M), A. proteae (N), A. tenuissima (O) - P to T) conidia: A. blumeae (P), A. calendulae (Q), A. perpunctulata (R), A. carotiincultae (S), A. triglochinicola (T) - U+V) conidia producing secondary conidia: A. mimicola (U), A. molesta (V) - scale bars: 10 µm (click on image to enlarge it)
Author(s): Y. Marin-Felix et al.
Source: Studies in Mycology (2019) 94, p. 7

Alternaria Nees 1817

This is a large and wide-spread genus with more than 300 species (Marin-Felix et al., 2019). It includes many important plant pathogens like Alternaria alternata, Alternaria brassicicola or Alternaria solani. The species form dark coloured colonies on agar with brown, elliptical conidia often arranged in chains. The condidia are round on the side of the conidiophore and often taper into a beak at the apical end. They contain vertical and often also longitudinal septa. The asci, if known, are usually cylindrical with 8 spores.

Type species: Alternaria alternata

For a review of the genus see Woudenberg et al., 2013.


Currently, the following species have been entered into the system: