The Korean Journal of Mycology (한국균학회지)

The Korean Society of Mycology (한국균학회)
권호 표지

Intergeneric Transfer of Isolated Nuclei from Lentinus edodes into Protoplasts of Pleurotus florida

사철느타리버섯 원형질체내에 표고 핵의 전이

  • Yoo, Young-Bok (Division of Molecular Genetics, National Agricultural Science and Technology Institute, R.D.A.) ;
  • Shin, Pyung-Gyun (Division of Molecular Genetics, National Agricultural Science and Technology Institute, R.D.A.)
  • 유영복 (농촌진흥청 농업과학기술원 분자유전과) ;
  • 신평균 (농촌진흥청 농업과학기술원 분자유전과)
  • Published : 1996.06.30
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Abstract

Transfer of the isolated nuclei from Lentinus edodes into protoplasts of Pleurotus florida was induced with polyethlene glycol (PEG) and $CaCl_2$. The intergeneric transfer products were classified into nuclear hybrid, heterokaryon or synkaryon, and reconstituted cell. These progenies except nuclear hybrids formed mature fruiting bodies on sawdust rice bran medium. Formation of fruit bodies was influenced by several factors such as light, temperature, nutrition and physic state of the culture media. Most of fruiting body characters were similar to those of P. florida in synkaryon and L. edodes in reconstituted cell, respectively. All these basidiocarps had clamp connections though initial heterokaryon colonies were lacking. Isozyme patterns of intergeneric progenies were quite different from those of parents. DNA polymorphisms of transfer products were also compared by random amplified polymorphic DNAs (RAPD) analysis based on polymerase chain reaction. The RAPD patterns were different from those of donor and recipient. DNA fingerprints ranged in size from 0.25 to 4.0 Kb. On the basis of RAPD, the transfer products were classified into five groups. Two synkaryon were analysed with distribution of progenies and segregation of genetic markers by random spore analyses. The genetic markers were segregated into wild type and riboflavine requiring auxotrophs.

표고 Lentinus edodes의 균사체로부터 핵을 분리하여 사철느타리 Pleurotus florida 원형질체에 폴리에틸렌 글라이콜로 전이하여 속간(屬間) 핵전이체(核轉移體)를 16균주 얻었다. 주된 핵전이주는 합핵체(合核體) synkaryon 또는 이질핵체로 꺽쇠연결체 clamp connections가 없었다. 그러나 톱밥배지를 이용하여 일정한 저온상태에서 광을 조사하여 꺽쇠연결체를 가진 균사가 다시 생장하여 사철느타리와 유사한 자실체를 형성하였으나 갓색택은 다소 달랐다. 꺽쇠연결체 형성에 영향을 주는 주요한 요인으로는 광, 온도, 배지의 영양, 배지의 생리적 상태로 나타났다. 핵치환체(核置換體) reconstituted cell는 꺽쇠연결체를 가진 표고와 유사한 균총형태로 자실체도 표고와 거의 유사하였다. 핵융합체(核融合體) nuclear hybrid는 이질배수체(異質倍數體) heteroploid로 균총생장이 빠르고 benormyl 첨가배지에서 균총분리가 나타나며 꺽쇠연결체와 자실체를 형성하지 않았다. 동위효소 esterase, leucine aminopeptidase 분석결과 핵융합체는 전혀 새로운 벤드양상이었으나 합핵체는 사철느타리의 주된 밴드를 형성하면서 양친에 없는 다소의 새로운 밴드를 형성하여 구분되었다. PCR에 의한 RAPD 벤드의 크기는 0.25-4.0 Kb였으며 유전유사도 분석으로 5군으로 구분할 수 있었는데 표고와 핵치환체, 핵합체 p669, 사철느타리와 12 핵합체, 핵융합체 p674, 핵융합체 p678이었다. 합핵체의 담자포자로 2 핵전이체를 유전분석한 결과 원영양형(原營養型) prototroph과 영양요구형(營養要求型) riboflavine으로 분리되었는데 그 비는 1 : 1, 1 : 2였다.

Keywords

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