<I>Calonectria</I> (<I>Cylindrocladium</I>) species associated with dying <I>Pinus</I> cuttings

Abstract

Calonectria (Ca.) species and their Cylindrocladium (Cy.) anamorphs are well-known pathogens of forest nursery plants in subtropical and tropical areas of the world. An investigation of the mortality of rooted Pinus cuttings in a commercial forest nursery in Colombia led to the isolation of two Cylindrocladium anamorphs of Calonectria species. The aim of this study was to identify these species using DNA sequence data and morphological comparisons. Two species were identified, namely one undescribed species, and Cy. gracile, which is allocated to Calonectria as Ca. brassicae. The new species, Ca. brachiatica, resides in the Ca. brassicae species complex. Pathogenicity tests with Ca. brachiatica and Ca. brassicae showed that both are able to cause disease on Pinus maximinoi and P. tecunumanii. An emended key is provided to distinguish between Calonectria species with clavate vesicles and 1-septate macroconidia.

Genera of phytopathogenic fungi: GOPHY 1

“…(2015) Ca. brassicae CBS 111869 T AF232857GQ267382FJ918567DQ190720KM232308GQ280576GQ280698Crous et al., 1999, Crous et al., 2006a, Crous et al., 2006b, Lombard et al., 2009, Lombard et al., 2010c, present study Ca. brassicicola CBS 112841 T KX784619KX784561KX784689––––Lombard et al.…”

Multigene phylogeny and mating tests reveal three cryptic species related to Calonectria pauciramosa

“…The presence of homothallic and heterothallic mating strategies in closely related fungi is interesting and could well provide another opportunity to analyse the genetics of mating systems in ascomycetes. This study has shown, however, that morphology in combination with phylogenetic inference provides the most useful approach to identify cryptic species in Calonectria (Lombard et al 2009). The present study has also shown the importance of the multi-gene approach in studying the phylogenetic relationships of phenotypic closely related Calonectria spp.…”

The forgotten Calonectria collection: Pouring old wine into new bags

“…Calonectria pseudoecuadoriae and C. plurilateralis (Ecuador) are both new additions to the C. brassicae and C. cylindrospora species complexes, respectively (Crous, 2002, Lombard et al., 2009, Alfenas et al., 2015). Calonectria pseudoecuadoriae is morphologically similar to C. ecuadoriae (Crous et al.…”

“…In other regions, such as southern Africa and Australia, Calonectria spp. appear mostly to be limited to forestry nurseries (Crous, 2002, Lombard et al., 2009, Lombard et al., 2010a, Lombard et al., 2010b, Lombard et al., 2010c). In agricultural and horticultural crops, Calonectria spp.…”