Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Phenylalanine Ammonia Lyase and Cinnamic Acid 4-Hydroxylase Activities of Rice and Pepper in response to UV and Wounding

벼와 고추에서 UV와 상처가 PAL 및 C4H 효소 활성에 미치는 영향

  • Kim, Mi-Young (Department of Agronomy, College of Agriculture, Kyungpook National University) ;
  • Yoon, Yong-Hwi (Department of Agronomy, College of Agriculture, Kyungpook National University) ;
  • Lee, Jung-Hoon (Department of Agronomy, College of Agriculture, Kyungpook National University) ;
  • Kim, Hak-Yoon (Department of Agronomy, College of Agriculture, Kyungpook National University) ;
  • Shin, Dong-Hyun (Faculty of Environmental Studies, Keimyung University) ;
  • Lee, In-Jung (Department of Agronomy, College of Agriculture, Kyungpook National University) ;
  • Kim, Dal-Ung (Department of Agronomy, College of Agriculture, Kyungpook National University) ;
  • Kim, Kil-Ung (Department of Agronomy, College of Agriculture, Kyungpook National University)
  • Published : 2002.06.01
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Abstract

The metabolites related to phenylpropanoid pathway play an important role in the self-defense of plants and induced by environmental stress like wounding, pathogen attack, UV-irradiation and so on. The mRNA level of rite phenylalanine ammonia lyase (PAL) was increased at 12 h to 48 h, however it was gradually decreased 48 h to 60 h after UV irradiation. The PAL enzyme activities in rice were peaked at the time of 24 h after UV irradiation, on the other hand, it was not affected by wounding. The PAL enzyme activities in pepper were raised high at 24 h and 10 h by UV irradiation and wounding respectively. The cinnamic acid 4-hydroxylase (C4H) activities were increased by wounding treatment and were detected from 12 h to end time point of experiment, while UV-irradiation didn't affect the C4H activity in rice and pepper. These results were assumed that the action of isoflavonid has an alternative effect on the defenses which include wounding and UV irradiation and on the diverse roles in rice and hot pepper.

Phenylpropanoid pathway 생성물질은 식물의 self-defense에 관계하며 이러한 물질들은 UV뿐 아니라 wounding, pathogen과 같은 environmental stress에 의해 생성되는 것으로 알려져 있다. 벼에서 PAL mRNA 는 UV 조사 후 12시간에서 48시간까지는 증가하였으나 48시간부터 60시간까지는 점점 줄어드는 경향을 보였다. 한편 PAL의 활성은 UV조사 후 24시간에서 가장 높았지만 상처에 의해서는 PAL의 활성이 벼에서는 증가하지 않았다. 그러나 고추에서는 UV조사와 상처를 준 후 24시간과 10시간에서 각각 높은 활성을 나타내었다. 벼와 고추 모두 cinnamic acid 4-hydroxylase의 활성은 상처를 준 후 12시간에서 증가하였지만 UV 조사는 C4H 활성에 영향을 주지 않았다. 이러한 결과로 볼 때 벼와 고추에서는 UV 조사와 상처가 모두 PAL, C4H 효소활성에 영향을 주는 것으로 나타났다.

Keywords

References

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