Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Interactions between Rhizobia and Flavonoids

Flavonoids와 근류균의 상호작용

  • Kang, Sang-Jae (Dept. of Agricultural Chemistry, Kyungpook National University) ;
  • Park, Woo-Churl (Dept. of Agricultural Chemistry, Kyungpook National University) ;
  • Seo, Sang-Hyun (Dept. of Agricultural Chemistry, Kyungpook National University)
  • Published : 1997.12.31
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Abstract

This experiment was carried out to elucidate the biological activity and absorption characteristics of flavonoids in Rhizobium and Bradyrhizobium and to obtain basic information on host specific nodulation by flavonoids in rhizobium-legume symbiosis. The purpose of the present study was to explore the biological activity and the flavonoid absorption indicates that host-specificity is induced by flavonoids in symbiotic nitrogen fixation. Biological activity increased by daidzein and genistein treatment on B. japonicum KCTC 1539 whereas decreased by luteolin treatment but increased by luteolin treatment on R. meliloti whereas decreased by daidzein and genistein treatment. Daidzein and genistein are absorbed by B. japonicum, KCTC 1539 at higher rate than other flavonoids. Especially, luteolin was absorbed at a least rate. Luteolin are absorbed by R. meliloti KCTC 2353 at higher rate than other flavonoids. Especially, daidzein and genistein was absorbed at a least rate.

본 연구는 숙주특이적인 근류형성에 두과작물의 뿌리분비물에 포함된 기주특이적인 flavonoids와 근류균의 상호작용에 대해 실험하였다. Flavonoid 화합물에 대한 근류균의 생물학적 활성은 B. japonocum의 경우 대두의 뿌리분비물에 포함된 flavonoid화합물인 daidzein과 genistein에서는 생장 증진 효과가 나타났으며, alfalfa의 뿌리분비물에 포함된 flavonoid인 luteolin에서는 생장 저해 효과가 나타났으며, R. meliloti의 경우 luteolin의 경우 생장증진 효과가 나타났으며, daidzein과 genistein의 경우 생장저해효과가 나타났다. 각 근류균의 흡수 특이성은 B. japonicum에서 daidzein과 genistein이 각각 $14.95\;{\mu}g/g$와 $14.20\;{\mu}g/g$로 가장 높고 luteolin이 가장 낮게 나타났으며, R. meliloti의 경우 luteolin이 $18.31\;{\mu}g/g$으로 가장 높고 daidzein과 genistein이 가장 낮게 나타났다. 이와 같은 사실로 숙주특이적인 flavonoids가 근류균의 숙주특이성에 깊은 관련이 있을 것으로 사료된다.

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