Regarding the secondary metabolite profile of the different smallspored
Alternaria isolates, none of the toxins could be associated with
a particular species-group. AOH, AME, TeA and ALT were produced by
members of all the sp.-grp. isolated from peppers; TEN was synthesized
by isolates from all groups except for the isolate belonging to the A.
armoraciae sp.-grp. On the other hand, the altertoxins were less commonly
synthesized by the pepper Alternaria strains. ATX-I was only produced
by members of the A. tenuissima sp.-grp. and one isolate
identified as Alternaria sp. Similarly, ATX-II was detected in a few members
of the A. tenuissima and A. arborescens sp.-grp.