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  • 1
    In: Forest Pathology, Wiley, Vol. 52, No. 3 ( 2022-06)
    Abstract: Symptoms of phytoplasma diseases, including witches' brooms, shoot proliferation, little leaf, yellowing and decline were observed in eleven species of bamboos in eight states of India. Symptomatic bamboo samples were indexed for phytoplasma presence using universal phytoplasma‐specific 16S rRNA gene primer pairs. Sequence comparison analysis and virtual RFLP analysis of 16S rRNA sequences indicated that the symptomatic bamboo samples of Dendrocalamus asper , Dendrocalamus strictus and Pseudoxytenanthera stocksii from Tripura, Uttar Pradesh, Uttarakhand and New Delhi and Bambusa bambos , Bambusa nutans , Bambusa pallida , Bambusa tulda , Dendrocalamus hamiltonia and D .  strictus from Karnataka were infected with ‘ Candidatus Phytoplasma australasia’‐related strains (16SrII‐C or 16SrII‐D); Bambusa vulgaris , D .  asper and P .  stocksii from Karnataka were positive for ‘ Ca . P. asteris’ strains (16SrI‐B), and one phytoplasma in B .  nutans from Sikkim was identified as ‘ Ca . P. cynodontis’ strain (16SrXIV‐A). Weeds and leafhoppers from the vicinity of bamboo plantations were also tested, and 16SrII group of phytoplasmas was identified in eight symptomatic weed species ( Ageratum conyzoides , Cannabis sativa , Cleome viscosa , Datura stramonium , Parthenium hysterophorus , Ocimum canum , Phyllanthus niruri and Tephrosia purpurea ) from five different states and one leafhopper species ( Mukaria spledida ) from three states. These results suggest that wide genetic diversity of phytoplasma exists in various bamboo species in different states of India. The report of 16SrI‐B, 16SrII‐D and 16SrXIV‐A subgroups of phytoplasmas infecting eight bamboo species except D .  strictus are the first records in the world.
    Type of Medium: Online Resource
    ISSN: 1437-4781 , 1439-0329
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2020304-4
    detail.hit.zdb_id: 2232646-7
    SSG: 23
    SSG: 12
    Location Call Number Limitation Availability
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  • 2
    In: Forest Pathology, Wiley, Vol. 52, No. 1 ( 2022-02)
    Abstract: Witches' broom, leaf yellowing and little leaf symptoms were recorded on Melia azedarach in Pune district of Maharashtra and Dhanha, West Champaran district of Bihar. Little leaf and leaf yellowing symptoms also were recorded on Eucalyptus camaldulensis in Bhiwani district of Haryana. Symptomatic and asymptomatic leaf samples were collected from roadside trees for DNA extraction and PCR assay with phytoplasma‐specific primer pairs of 16S rRNA and secA genes. Amplicons of ~1.25 kb and ~840 bp were consistently obtained from all symptomatic samples of both the tree species using the phytoplasma‐specific primer pairs. Pairwise sequence analysis of 16S rRNA and secA gene sequences and phylogenetic analysis revealed that the phytoplasma strains associated with M .  azedarach belonged to 16SrI‐B and 16SrVI‐D subgroups and those associated with E .  camaldulensis were from the 16SrII‐D subgroup. This is the first report of an association of a ‘ Candidatus Phytoplasma trifolii’‐related strain (16SrVI‐D subgroup) with M .  azedarach globally and a ‘ Ca . P. australasia’‐related strain with E .  camaldulensis in India.
    Type of Medium: Online Resource
    ISSN: 1437-4781 , 1439-0329
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2020304-4
    detail.hit.zdb_id: 2232646-7
    SSG: 23
    SSG: 12
    Location Call Number Limitation Availability
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  • 3
    In: Forest Pathology, Wiley, Vol. 50, No. 1 ( 2020-02)
    Abstract: Leaf yellowing symptoms were observed on Acacia mangium in the Sipahijala district of Tripura, India, during June 2017. Symptomatic and asymptomatic leaf samples (three of each) were collected from roadside trees of A .  mangium for DNA extraction using the CTAB method. Amplicons of ~1.25 kb and ~480 bp were detected in all the symptomatic samples using the phytoplasma‐specific universal 16S rRNA and sec A gene primers. Pair wise sequence analysis of 16S rRNA gene sequences, virtual RFLP and phylogenetic analysis revealed that the phytoplasma strain associated with A .  mangium belonged to phytoplasma subgroup 16SrII‐C. This is the first report of an association between the 16SrII‐C subgroup and A .  mangium leaf yellowing.
    Type of Medium: Online Resource
    ISSN: 1437-4781 , 1439-0329
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2020304-4
    detail.hit.zdb_id: 2232646-7
    SSG: 23
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
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