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KMID : 0379119930210030188
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Korean Journal of Mycology
1993 Volume.21 No. 3 p.188 ~ p.194
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Anastomosis Types and Hyphal Interactions among Different Location and Field Isolates of Rhizoctonia solani AG-1(IA) , R. oryzae and R. oryzae - sativae
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Abstract
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Anastomosis types and hyphal interactions in culture among different location and field isolates of Rhizoctonia solani AG-1(IA), R oryzae and R oryzae-sativae were examined. In the pairings of R. solani AG-1(IA) isolates, cytoplasmic fusion only occurred in the self-anastomoses, and non-cytoplasmic fusion occurred in the other combinations. In the pairings of R. oryzae isolates, cytoplasmic fusion occurred in six combinations between different location isolates and in two combinations between different field isolates from the same locations as well as in the self-anastomoses. In that case, four isolates of the fungus reciprocally made the cytoplasmic fusion. In the pairings of R. oryzae-sativae isolates, only non-cytoplasmic fusion occurred among the different location and field isolates, in which cytoplasmic fusion also occurred in the self-anastomoses. When non-cytoplasmic fusion isolstes(NCFIs) of R. solani AG-I(IA) were opposed on PDA, a killing zone developed between the NCFIs paired after incubation. The killing zone also developed between the NCFIs of R oryzae paired. No killing zone developed between the cytoplasmic fusion isolates(CFIs) of R oryzae, in which mycelia of the CFIs intermingled with each other without formation of any demarcation line. An entangled zone instead of the killing zone developed between the NCFIs of R. oryzae-sativae.
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