Vol. 17 No. 3
Variability among Bipolaris sorokiniana isolates of wheat from North-Eastern Plain Zones of India
Author(s): H.M. DEVI, T. DAS, S. DAS AND S. MAHAPATRA
Abstract: This experiment was conducted to study the morphological, cultural and biochemical variability among fourteen isolates of Bipolaris sorokiniana (Shoem) causing spot blotch of wheat from different locations of northeastern plain zones of India. Colony colour varied in three different media and changed with as the culture became older. Morphological variability was studied by comparing their conidial size (both length and breadth) and number of septations both from the isolates of natural infected leaves and from culture media. Based on β - and β - esterase profiling, the biochemical variability existed among the isolates. Positive activity was reported in case of both β - and β - esterase. β -Esterase enzyme observed the highest enzyme activity in terms of maximum numbers of banding loci as compared to β -esterase. From this study it can be concluded that cultural, morphological and biochemical variability existed among the isolates of B. sorokiniana which may be associated with the pathogenicity within the host plant.
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