Ancient Platycladus orientalis holds significant ecological, landscape, historical, and cultural value. In northern China, leaf blight has significantly impacted the growth and ornamental value of ancient P. orientalis . In this study, 26 blight leaf samples of ancient P. orientalis were collected in Beijing, China. Phylogenetic analysis based on the concatenated internal transcribed spacer (ITS), β-tubulin ( tub 2), and RNA polymerase second largest subunit ( rpb 2) DNA sequence data combined with fungal morphological characteristics revealed three taxa of Nothophoma , i.e. N. platycladus , N. spiraeae , and N. juglandis . Of which, N. platycladus is a species new to science. Koch’s postulates indicated that all these three species of Nothophoma could cause leaf blight of P. orientalis .
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Jiao et al. (2024) studied this question.
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