Publication Date:
2024-03-20
Description:
Rosa (Rosaceae) is an important ornamental and medicinal plant genus worldwide, with several species being cultivated in China. Members of Sporocadaceae (pestalotioid fungi) are globally distributed and include
endophytes, saprobes but also plant pathogens, infecting a broad range of host plants on which they can cause
important plant diseases. Although several Sporocadaceae species were recorded to inhabit Rosa spp., the taxa
occurring on Rosa remain largely unresolved. In this study, a total of 295 diseased samples were collected from
branches, fruits, leaves and spines of eight Rosa species (R. chinensis, R. helenae, R. laevigata, R. multiflora,
R. omeiensis, R. rugosa, R. spinosissima and R. xanthina) in Gansu, Henan, Hunan, Qinghai, Shaanxi Provinces
and the Ningxia Autonomous Region of China. Subsequently 126 strains were obtained and identified based on
comparisons of DNA sequence data. Based on these results 15 species residing in six genera of Sporocadaceae
were delineated, including four known species (Pestalotiopsis chamaeropis, Pes. rhodomyrtus, Sporocadus sorbi
and Spo. trimorphus) and 11 new species described here as Monochaetia rosarum, Neopestalotiopsis concentrica,
N. subepidermalis, Pestalotiopsis tumida, Seimatosporium centrale, Seim. gracile, Seim. nonappendiculatum,
Seim. parvum, Seiridium rosae, Sporocadus brevis, and Spo. spiniger. This study also represents the first report
of Pes. chamaeropis, Pes. rhodomyrtus and Spo. sorbi on Rosa. The overall data revealed that Pestalotiopsis was
the most prevalent genus, followed by Seimatosporium, while Pes. chamaeropis and Pes. rhodomyrtus were the
two most prevalent species. Analysis of Sporocadaceae abundance on Rosa species and plant organs revealed
that spines of R. chinensis had the highest species diversity.
Keywords:
Ecology
;
Evolution
;
Behavior and Systematics
;
Amphisphaeriales
;
Ascomycota
;
new taxa
;
phylogeny
;
taxonomy
Repository Name:
National Museum of Natural History, Netherlands
Type:
info:eu-repo/semantics/article
Format:
application/pdf
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