Species of the Colletotrichum gloeosporioides and C. boninense complexes associated with olive anthracnose. (6th August 2013)

• Record Type: Journal Article
• Authors: Schena, L.; Mosca, S.; Cacciola, S. O.; Faedda, R.; Sanzani, S. M.; Agosteo, G. E.; Sergeeva, V.; Magnano di San Lio, G.
• Is Part Of: Plant pathology. Volume 63:Number 2(2014:Apr.)
• Page Start: 437
• Page End: 446
• Publication Date: 2013-08-06
• Subjects: Agricultural pests -- Periodicals; Plant diseases -- Periodicals; 632
• DOI: 10.1111/ppa.12110
• Languages: English
• ISSNs: 0032-0862

Abstract

<abstract abstract-type="main" id="ppa12110-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The taxonomic status of <italic>Colletotrichum gloeosporioides sensu lato</italic> (<italic>s.l</italic>.) associated with olive anthracnose is still undetermined and the pathogenic ability of this species complex is controversial. In the present study, isolates obtained from olive and provisionally identified as <italic>C. gloeosporioides s.l</italic>. on the basis of morphological and cultural features were reclassified using ITS and <italic>TUB2</italic> as DNA barcode markers and referred to seven distinct species, recently separated within <italic>C. gloeosporioides</italic> (<italic>C. aenigma</italic>, <italic> C. gloeosporioides sensu stricto</italic> (<italic>s.s</italic>.), <italic>C. kahawae</italic>, <italic> C. queenslandicum</italic>, <italic> C. siamense</italic> and <italic>C. theobromicola</italic>) and <italic>C. boninense</italic> (<italic>C. karstii</italic>) species complexes. Furthermore, isolates of <italic>C</italic>. <italic>kahawae</italic> were ascribed to the subspecies <italic>ciggaro</italic> by analysing the <italic>GS</italic> gene. A single isolate, not in either of these two species complexes, was not identified at the species level. In pathogenicity tests on detached olive drupes some of these species, including <italic>C. aenigma</italic>, <italic> C. kahawae</italic> subsp. <italic>ciggaro</italic>, <italic> C. queenslandicum</italic>, <italic> C. siamense</italic> and <italic>C. karstii</italic>, were shown to be weakly pathogenic. Moreover, they were found very sporadically on olive. In contrast, some isolates of <italic>C. gloeosporioides s.s</italic>. and isolates of <italic>C. theobromicola</italic> proved to be virulent on both green and ripening olives. This study gives a better insight into both the aetiology and the epidemiology of olive anthracnose and might have implications for biosecurity and quarantine because <italic>C. theobromicola</italic> has never been reported in major European olive‐producing countries.</p> </abstract>