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  • Open Access


    Morphological and Phylogenetic Resolution of Diplodia neojuniperi Emerging Diplodia Top Dieback of Pinus thunbergii Parl. in China

    Xiaolei Ding, Ruiwen Zhao, Sixi Lin, Jianren Ye*

    Phyton-International Journal of Experimental Botany, Vol.91, No.12, pp. 2813-2825, 2022, DOI:10.32604/phyton.2022.024609

    Abstract In Bazhong City, Sichuan Province, China, top dieback symptoms were found on many pine trees (Pinus thunbergii Parl). The tips of old needles first turned grayish-green and then developed into brown bands in the field. Phylogenetic analysis of concatenated ITS and EF1-α indicated the pathogen of this dieback disease as Diplodia neojuniperi. Additionally, effects of temperature, pH and medium on the mycelial growth were also characterized. The most favorable temperature and pH level for mycelial growth are 25°C and 8, respectively. The optimal medium for mycelial growth is PDA medium. To our knowledge, this is the first report of D.… More >

  • Open Access


    Aspergillus tubingensis Causes Leaf Spot of Cotton (Gossypium hirsutum L.) in Pakistan

    Maria Khizar1, Urooj Haroon1, Musrat Ali1, Samiah Arif2, Iftikhar Hussain Shah2 , Hassan Javed Chaudhary1, Muhammad Farooq Hussain Munis1,*

    Phyton-International Journal of Experimental Botany, Vol.89, No.1, pp. 103-109, 2020, DOI:10.32604/phyton.2020.08010

    Abstract Cotton (Gossypium hirsutum L.) is a key fiber crop of great commercial importance. Numerous phytopathogens decimate crop production by causing various diseases. During July-August 2018, leaf spot symptoms were recurrently observed on cotton leaves in Rahim Yar Khan, Pakistan and adjacent areas. Infected leaf samples were collected and plated on potato dextrose agar (PDA) media. Causal agent of cotton leaf spot was isolated, characterized and identified as Aspergillus tubingensis based on morphological and microscopic observations. Conclusive identification of pathogen was done on the comparative molecular analysis of CaM and β-tubulin gene sequences. BLAST analysis of both sequenced genes showed 99%… More >

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