Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Effects of Mycorrhizal Inoculation on Plant Growth and N Metabolites in Relation to drought-stress Tolerance

Mycorrhiza 접종이 가뭄 스트레스하의 식물성장과 질소 대사산물에 미치는 영향

  • Lee, Bok-Rye (Department of Animal Science, College of Agriculture and Life Science, Chonnam National University) ;
  • Jung, Woo-Jin (Department of Animal Science, College of Agriculture and Life Science, Chonnam National University) ;
  • Kim, Dae-Hyun (Department of Animal Science, College of Agriculture and Life Science, Chonnam National University) ;
  • Kim, Kil-Yong (Department of Biological & Environmental Chemistry, College of Agriculture and Life Science, Chonnam National University) ;
  • Shon, Bo-Kyoon (Department of Agricultural chemistry, Sunchon National University) ;
  • Kim, Tae-Hwan (Department of Animal Science & Institute of Agriculture Science and Technology, Chonnam National University)
  • 이복례 (전남대학교 농업생명과학대학 동물자원학과) ;
  • 정우진 (전남대학교 농업생명과학대학 동물자원학과) ;
  • 김대현 (전남대학교 농업생명과학대학 동물자원학과) ;
  • 김길용 (전남대학교 농업생명과학대학 생물환경화학과) ;
  • 손보균 (순천대학교 농과대학 농화학과) ;
  • 김태환 (전남대학교 농업생명과학대학 동물자원학과 & 농업과학기술연구소)
  • Received : 2002.09.02
  • Accepted : 2002.09.26
  • Published : 2002.10.30
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Abstract

The effects of arbuscular mycorrhizal (AM) fungus (Glomus intraradices) on plant growth and N metabolic responses were examined in perennial ryegrass plants exposed to drought-stressed or well-watered condition. Mycorrhizal inoculation improved significantly leaf water potential, dry mass and P content. Drought stress increased significantly nitrate concentration in roots where the increase was much less in AM than non-AM. Drought stress decreased the concentration of soluble proteins in non-AM shoots, whereas non-significant decline occurred in AM shoots even under drought condition. The concentrations of ammonia and proline in drought stressed non-AM plants significantly increased, while mycorrhizal inoculation lowered significantly ammonia and proline accumulation. The decrease in leaf dry weight in drought stressed-plants was significantly correlated to the increase in ammonia (p<0.01) and proline concentration (p<0.01). These results suggested that the increased P content and N assimilation by mycorrhizal inoculation may be associated with drought stress tolerance, showing the moderating effects on shoot growth inhibition and ammonia accumulation in drought stressed-plants.

페레니얼 라이그라스의 가뭄스트레스 저항성과 관련하여 균근균(mycorrhiza) 접종이 작물생장 및 질소대사 산물에 미치는 영향을 조사하였다. 균근균 접종에 의한 잎의 수분퍼텐셜, 건물량 및 인의 함량의 유의적인 증가가 인정되었다. 가뭄스트레스 상태에서 뿌리의 질산염 농도는 증가하였으며, 균근균 비접종구가 접종구에 비하여 현저하였다. 잎의 수용성 단백질 함량은 가뭄 스트레스 하에서 균근균 비접종구가 접종구에 비해 현저히 감소하였다. 전 실험기간 동안 가뭄 스트레스 처리구의 암모니아와 proline의 농도는 현저히 증가하였으며, 균근균 접종구에서는 증가가 현저히 완화되었다. 가뭄 스트레스 하에서 잎의 건물량 감소는 암모니아(p<0.01)와 proline(p<0.001) 농도의 증가와 부의 유의적인 상관성을 보였다. 이상의 결과로 볼 때, 균근균의 접종 효과는 가뭄 스트레스 하에서 작물의 성장 억제를 완화시켰으며, 인의 함량과 질소의 동화 작용을 증가 시켰다.

Keywords

References

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