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Ganesan, Sangeetha,Singh, Hari Shankar,Petikam, Srinivas,Biswal, Debasish The Korean Society of Plant Pathology 2017 Plant Pathology Journal Vol.33 No.1
Incidence of leaf blast on nursery plants and pitting disease on maturing banana bunches has been recorded in banana plantations during rainy season in Eastern India during 2014 to 2015. Taxonomical identification as well as DNA sequence analysis of the internal transcribed spacer region of fungus isolated from affected tissue culture derived plantlets and fruits confirmed the pathogen to be Pyricularia angulata Hashioka "in both the cases". Koch's postulates were proved on young plantlets as well as on maturing fruits of cv. Grand Naine under simulated conditions. Evolutionary history was inferred and presented for our P. angulata strain PG9001 with GenBank accession no. KU984740. The analysis indicated that the P. angulata is phylogenitically distinct from other related species related to both Pyricularia and Magnaporthe. Detailed symptoms of blast lesions on young leaves, transition leaves, mid rib, petioles, peduncle, maturing bunches, bunch stalks and cushions were documented. Notably, the distinct small pitting spots on maturing bunches reduced the visual appeal of mature fruits. Appearance of pitting symptoms on fruits in relation with age of fruits and their distribution pattern on bunch and fingers was also documented in detail. Further, the roles of transitory leaves, weed hosts, seasonality on disease occurrence have also been documented.
Sangeetha Ganesan,Hari Shankar Singh,Srinivas Petikam,Debasish Biswal 한국식물병리학회 2017 Plant Pathology Journal Vol.33 No.1
Incidence of leaf blast on nursery plants and pittingdisease on maturing banana bunches has beenrecorded in banana plantations during rainy seasonin Eastern India during 2014 to 2015. Taxonomicalidentification as well as DNA sequence analysis of theinternal transcribed spacer region of fungus isolatedfrom affected tissue culture derived plantlets andfruits confirmed the pathogen to be Pyricularia angulataHashioka “in both the cases”. Koch’s postulateswere proved on young plantlets as well as on maturingfruits of cv. Grand Naine under simulated conditions. Evolutionary history was inferred and presented forour P. angulata strain PG9001 with GenBank accessionno. KU984740. The analysis indicated that theP. angulata is phylogenitically distinct from other relatedspecies related to both Pyricularia and Magnaporthe. Detailed symptoms of blast lesions on youngleaves, transition leaves, mid rib, petioles, peduncle,maturing bunches, bunch stalks and cushions weredocumented. Notably, the distinct small pitting spotson maturing bunches reduced the visual appeal of maturefruits. Appearance of pitting symptoms on fruitsin relation with age of fruits and their distributionpattern on bunch and fingers was also documentedin detail. Further, the roles of transitory leaves, weedhosts, seasonality on disease occurrence have also beendocumented.