• 제목/요약/키워드: Aspergillus nidutans

검색결과 2건 처리시간 0.016초

동부 콩열매에 있는 진균류와 균독소에 관한 연구 (Studies on Mycoflora and Mycotoxins of Cowpea Cultivars)

  • Zohri, A.A.;Khayria, M.;Gawad, Abd. El.
    • 한국균학회지
    • /
    • 제20권3호
    • /
    • pp.252-258
    • /
    • 1992
  • Czpaek agar을 이용하여, 동부품종의 콩열매에서, 11속 25종 1품종의 진균과 10% NaCl을 첨가한 배지에서 7속 18종 2품종의 진균을 분리하였다. 이때 분리된 진균의 코로니는 6716/g이였다. Czpaek 배지를 통하여 분리 동정된 균은 대부분이 Aspergillus, Pericillium, Emericella 및 Rhizopus속에 속하는 균들이였다. 위에서 소금에 내성이 강한 균으로 분리 동정된 균들은 A. favus, A. sydowii, A. tomari, A. flavipes, A. niger, A. flavar var. columnaris, A. ochraceus, A. oryzae 및 P. chrysogerism 이였다. 각각의 시료를 사용하여 Aflatoxin $B_1,\;B_2,\;G_1$$G_2$을 분석한 결과, 잔존된 것을 관찰하였다.

  • PDF

Screening of Growth- or Development-related Genes by Using Genomic Library with Inducible Promoter in Aspergillus nidulans

  • Lee Bang-Yong;Han Sang-Yong;Choi Han Gil;Kim Jee Hyun;Han Kap-Hoon;Han Dong-Min
    • Journal of Microbiology
    • /
    • 제43권6호
    • /
    • pp.523-528
    • /
    • 2005
  • Using the genomic library constructed at the downstream of the niiA promoter, which induces the over-expression of an inserted DNA fragment, we have attempted to screen the genes affecting growth or development by over-expression. The wild-type strain was transformed using the AMA-niiA(p) library and cultured on 1.2 M sorbitol media, in which asexual sporulation is induced, but sexual development is repressed. Over 100,000 strains transformed to $pyrG^+$ were analyzed with regard to any changes in phenotype. Consequently, seven strains were isolated for further analyses. These strains were designated NOT [niiA(p) over-expression transformants] stains. Four of the strains were of the inducible type, and the remaining strains were of the multi-copy suppression type. Two of the inducible-type strains, NOT 1 and NOT40, harbored genes which had been inserted in reverse direction, suggesting that the mutant phenotypes had been derived from an excess amount of anti-sense mRNA. Domain analyses of the deduced polypeptides from the DNA fragments rescued from the transformants revealed that NOT1, NOT40 and NOT6 harbored a LisH motif, a forkhead domain, and a $Zn(II)_2Cys_6$ binuclear zinc cluster, respectively.