Occurrence of Alternaria arborescens causing leaf spot on Pereskia aculeata in Brazil

Hahn, Marlon Henrique; Claus, A.; Koch, Gabriel; Gelain, Jhulia; Duarte, Henrique da Silva Silveira

doi:10.1016/j.cropro.2021.105824

Cited by 5 publications

(1 citation statement)

References 17 publications

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“…Additionally, A. arborescens E.G. Simmons has been reported to cause leaf spots on Pereskia aculeata in Brazil [16]. In addition, the conidia of Alternaria are the most common airborne allergens and have been determined to be significant triggers of allergic rhinitis and allergic asthma [17,18].…”

Section: Introductionmentioning

confidence: 99%

Alternaria arborescens and A. italica Causing Leaf Blotch on Celtis julianae in China

Liao,

Cao,

Wan

et al. 2023

Plants

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Celtis julianae Schneid. is widely planted as a versatile tree species with ecological and economic significance. In September 2022, a leaf blotch disease of C. julianae was observed in Nanjing, Jiangsu, China, with an infection incidence of 63%. The disease led to severe early defoliation, significantly affecting the ornamental and ecological value of the host tree. The accurate identification of pathogens is imperative to conducting further research and advancing disease control. Koch’s postulates confirmed that the fungal isolates (B1–B9) were pathogenic to C. julianae. The morphology of the characteristics of the pathogen matched those of Alternaria spp. The internal transcribed spacer region (ITS), large subunit (LSU) and small subunit (SSU) regions of rRNA, glyceraldehyde-3-phosphate dehydrogenase (GAPDH), Alternaria major allergen gene (Alt a 1), RNA polymerase second largest subunit (RPB2), and portions of translation elongation factor 1-alpha (TEF1-α) genes were sequenced. Based on multi-locus phylogenetic analyses and morphology, the pathogenic fungi were identified as Alternaria arborescens and A. italica. The findings provided useful information for disease management and enhanced the understanding of Alternaria species diversity in China. This is the first report of A. arborescens and A. italica causing leaf blotch of C. julianae in China and worldwide.

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Section: Introductionmentioning

confidence: 99%