Identification and characterization of Albonectria, Fusarium, and Neocosmospora species associated with ornamental plants in Southern China

TY - JOUR

T1 - Identification and characterization of Albonectria, Fusarium, and Neocosmospora species associated with ornamental plants in Southern China

AU - Zhang, Y.X.

AU - Chen, C.

AU - Nie, L.T.

AU - Maharachchikumbura, Sajeewa S. N.

AU - Crous, P.W.

AU - Hyde, Kevin David

AU - Xiang, M.M.

AU - Al-Otibi, F

AU - Manawasinghe, Ishara S.

PY - 2024/12/23

Y1 - 2024/12/23

N2 - Species belonging to Albonectria, Fusarium, and Neocosmospora are well-known destructive phytopathogens and are widely distributed worldwide. Although these genera have been well studied in recent years, fewer studies have focused on understanding the relationship between these fungi and ornamental plants in China, the largest producer of ornamental plants. The present study collected ornamental plant samples with disease symptoms from South China. In total, 77 fusarioid isolates were obtained from 25 ornamental plants representing 24 genera. These isolates were further identified using six gene regions: the internal transcribed spacer regions (ITS), calmodulin (CaM), the RNA polymerase largest subunit (rpb1), the RNA polymerase second largest subunit (rpb2), the translation elongation factor 1-alpha (tef1-α) and β-tubulin (tub2). Based on multi-gene phylogeny and morphology, 25 species were identified, including eight new species belonging to three genera, Albonectria, Fusarium, and Neocosmospora were identified. Among these, 19 species belonged to four Fusarium species complexes, viz., F. fujikuroi species complex, F. nisikadoi species complex, F. oxysporum species complex, and the F. tricinctum species complex. Here, we described five new Fusarium species, namely, F. anoectochili, F. cymbidii, F. dendrobii, F. dendranthematis, F. guangdongense, and one undefined species. In addition, five Neocosmospora species were identified, and two species N. guangdongensis and N. paphiopedili, were described as new. In addition, we described a new Albonectria species, A. schimae. Further, taxonomic updates in this study showed that Fusarium rosae roxburghii should be reduced to synonymy with F. odoratissimum based on phylogenetic placem e nts and morphologicalsimilarit i es. Our study also provides 23 new fungal-host associations from 15 fusarioid species. This study indicates a rich diversity of fusarium-like genera in ornamental plants in subtropical and tropical parts of China. Also, it provides a basic understanding of identifying common diseases caused by fusarioid fungi.

AB - Species belonging to Albonectria, Fusarium, and Neocosmospora are well-known destructive phytopathogens and are widely distributed worldwide. Although these genera have been well studied in recent years, fewer studies have focused on understanding the relationship between these fungi and ornamental plants in China, the largest producer of ornamental plants. The present study collected ornamental plant samples with disease symptoms from South China. In total, 77 fusarioid isolates were obtained from 25 ornamental plants representing 24 genera. These isolates were further identified using six gene regions: the internal transcribed spacer regions (ITS), calmodulin (CaM), the RNA polymerase largest subunit (rpb1), the RNA polymerase second largest subunit (rpb2), the translation elongation factor 1-alpha (tef1-α) and β-tubulin (tub2). Based on multi-gene phylogeny and morphology, 25 species were identified, including eight new species belonging to three genera, Albonectria, Fusarium, and Neocosmospora were identified. Among these, 19 species belonged to four Fusarium species complexes, viz., F. fujikuroi species complex, F. nisikadoi species complex, F. oxysporum species complex, and the F. tricinctum species complex. Here, we described five new Fusarium species, namely, F. anoectochili, F. cymbidii, F. dendrobii, F. dendranthematis, F. guangdongense, and one undefined species. In addition, five Neocosmospora species were identified, and two species N. guangdongensis and N. paphiopedili, were described as new. In addition, we described a new Albonectria species, A. schimae. Further, taxonomic updates in this study showed that Fusarium rosae roxburghii should be reduced to synonymy with F. odoratissimum based on phylogenetic placem e nts and morphologicalsimilarit i es. Our study also provides 23 new fungal-host associations from 15 fusarioid species. This study indicates a rich diversity of fusarium-like genera in ornamental plants in subtropical and tropical parts of China. Also, it provides a basic understanding of identifying common diseases caused by fusarioid fungi.

KW - 8 new taxa

KW - 23 new host records

KW - Albonectria

KW - fusarioid

KW - Fusarium

KW - Nectriaceae

KW - Neocosmospora

KW - polyphasic analysis

U2 - 10.5943/mycosphere/15/1/30

DO - 10.5943/mycosphere/15/1/30

M3 - Article

SN - 2077-7019

VL - 15

SP - 6641

EP - 6717

JO - Mycosphere

JF - Mycosphere

IS - 1

ER -