Enzyme Activity and Gene Expression of Cytochrome P450 Involved in Capsidiol Biosynthesis in Solanaceae Plants

가지과식물에서 Capsidiol 생합성에 관여하는 Cytochrome P450 유전자의 발현과 효소활성

  • 권순태 (안동대학교 생명자원과학부) ;
  • Published : 2008.04.30

Abstract

Enzyme activity and expression of cytochrome P450 gene involved in the pathway of capsidiol biosynthesis were compared in five different solanaceae plants such as red pepper, green pepper, tobacco, potato and egg plant. Base on genomic DNA and/or RT-PCR results, four solanaceae plants such as red pepper, green pepper, tobacco and egg plant possess P450 gene in the genome and specifically expressed by elicitor treatment. However, potato was appeared to have neither P450 nor cyclase gene in the genome. P450 genes did not show any expression in the plants under normal condition, but showed highly specific expression under elicitation condition in various organs and tissue such as leaf, root, stem and culture cells.

다섯 종류의 가지과 식물을 대상으로 elicitor에 의해 생합성 되는 capsidiol의 함량을 측정하고 생합성에 관련된 P450 효소의 활성과 관련 유전자 발현을 조사하였다. 고추, 피망 및 담배는 capsidiol의 생합성에 관련된 두개의 유전자인 cyclase와 P450 유전자가 세포내에 존재하였고, elicitor의 처리에 의하여 유전자의 발현이 유도되고 효소의 촉매가 이루어 졌다. 가지세포에는 두개의 유전자가 게놈상에 존재하지만 P450 유전자는 발현되나, cyclase 유전자의 발현은 나타나지 않았다. 감자에는 capsidiol의 생합성에 관련된 P450 및 cyclase 유전자 모두가 존재하지 않은 것으로 나타났다. 본 실험에 사용된 P450과 cyclase 유전자는 식물이 정상상태에 있을 때는 전혀 발현되지 않으나 elicitor에 의해 특이적으로 유도 되는 특징을 보였고, 식물체 조직이나 기관별로 다양한 발현 양상을 보였다.

Keywords

References

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