Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Antagonistic Relationships Between Development of Sporangiophores and Phototropism Depending on Monochromatic Light Wavelengths in Phycomyces blakesleeanus

털곰팡이(Phycomyces blakesleeanus)의 생장기간 중 파장별 단색광 조사에 따른 굴광성 반응과 포자낭병 발생간의 길항관계

  • Lee, Bum-Kyu (National Academy of Agricultural Science, Rural Development Administration) ;
  • Park, Ae-Ri (Department of Applied Biology, Chungnam National University) ;
  • Kim, Hye-Jeong (Department of Applied Biology, Chungnam National University) ;
  • Shin, Dong-Ho (Research Center for Plant Metabolism, Kyunghee University) ;
  • Choi, Kwan-Sam (Department of Applied Biology, Chungnam National University)
  • 이범규 (농촌진흥청 국립농업과학원 생물안전성과) ;
  • 박애리 (충남대학교 농업생명과학대학 응용생물학과) ;
  • 김혜정 (충남대학교 농업생명과학대학 응용생물학과) ;
  • 신동호 (경희대학교 식물대사연구센터) ;
  • 최관삼 (충남대학교 농업생명과학대학 응용생물학과)
  • Received : 2009.01.28
  • Accepted : 2009.06.03
  • Published : 2009.06.30
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Abstract

Six strains of Phycomyces blakesleeanus (DEL, A56, C9, C47, C111, and G5) were cultured in continuous light condition for 6 days. The increase in fresh and dry weight after the culture period was similar in all strains. However, the increase in fresh weight was sustained throughout the culture period in all strains, whereas the increase in dry weight was prominent only during the first 3 days of culture. The development and phototropism of macrophores was observed after 3 days of culture, These results suggest that the development and phototropism is ascribed to the increase in turgor pressure in sporangiophores where water entered. A56 and G5 showed a higher sensitivity to light than C9 and C47, whereas C111 showed no photosensitivity. Antagonistic relations were observed between photosensitivity and development of microphores, suggesting that the development and phototropism of macrophores is regulated by a common recognition factor (photoreceptor).

털곰팡이 야생종(DEL)과 5균주의 돌연변이 (A56, C9, C47, C111, G5)를 명소에서 6일간의 생장을 조사한 결과 생육일수에 따른 생 중량의 증가나 건물 중의 증가는 공시한 6균주가 동일한 경향을 보여 돌연변이 균주간의 차이는 인정할 수 없었다. 그러나 생중량과 건물중의 패턴 변화는 큰 차이를 보여 공시 균주 모두 배양 후 3일 이후부터는 건물 중의 증가는 뚜렷하지 않으나 생중량만은 계속 증가하였다. 이러한 사실은 배양 3일 이후에 형성되는 대형포자낭병의 발생과 굴광성이 건물생장에 의한 것이 아니라 오로지 수분유입팽창력 따른 편차생장 때문임을 강하게 시사하고 있다. 균주 간에서 보이는 파장별 굴광성의 감수성은 A56과 DEL, G5에서 가장 강하게 나타나 적색광의 파장역에서도 굴광성을 보이는 반면 C9 과 C47은 청색광 영역에서만 약한 감수성을 나타내었다. 그리고 C111은 전혀 굴광성을 나타내지 않았다. 이들 대형포자낭의 굴광성에 대한 광 감수성과 미소포자낭병의 발생 간에 어떤 길항적인 관계가 성립됨이 확인되었다. 즉 6균주 모두 대형포자낭의 굴광성이 청색광역에서 강하게 나타나다가 적색광역에선 그 반응이 감소되면서 미소포자낭병의 발생이 오히려 증가되었다. 이러한 결과로 미루어 볼 때 이들 대형포자낭의 발생 및 굴광성과 미소포자낭병의 발생 간에는 광파장의 인식인자(광수용체)가 하나의 공통적 기작에 의해 조절된다는 사실을 강하게 시사했다.

Keywords

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