Effects of Low Dose Gamma Radiation on the Growth and Antioxidant Enzyme Activities of Chinese Cabbage (Brassica campestris L.) Seedlings

배추 유식물의 생장과 항산화효소의 활성도에 미치는 저선량 방사선의 효과

  • 김재성 (한국원자력연구소 동위원소, 방사선응용연구팀) ;
  • 이영근 (한국원자력연구소 동위원소, 방사선응용연구팀) ;
  • 백명화 (한국원자력연구소 동위원소, 방사선응용연구팀) ;
  • 김동희 (한국원자력연구소 동위원소, 방사선응용연구팀) ;
  • 이영복 (충남대학교 농과대학)
  • Published : 2000.06.01

Abstract

In order to investigate the stimulatory effect(hormesis) of low dose gamma-radiation on the seeding growth of old seeds with respect to antioxidant defense systems, various doses of gamma radiation to the 5-year-old dried seeds of Chinese cabbage (Brassica campestris L. cv Sulin eockaei). Compared to the new, 1-year- old seeds, old seeds irradiated by low does gamma radiation in the range of 1-2 Gy showed vigor growth as revealed by statistically significant increases both in the germination rates and the leaf size and fresh weight. Further, seedlings grown from seeds treated by low dose gamma radiation showed higher peroxidase and catalase activities than non-treated seedlings. These results suggest that the antioxidant defense systems could be closely related to the stimulatory effects of low dose radiation. [antioxidant enzyme, chinese cabbage, gamma radiation, germination rate, hormesis]

저선량 ${\gamma}$선이 시판중인 배추 신규종자인 "만점" 배추와 묵은 종자인 "서림엇갈이" 배추의 발아와 초기생육 및 생리활성에 미치는 영향을 조사하였다. 배추종자의 발아와 초기생육에 있어 신규종자에서는 별효과가 없었으나 묵은 종자에서는 촉진효과가 있었고 그 적정 선량은 1.0Gy와 2.0Gy였다. 배추유식물체의 엽록소 함량은 저선량 조사구가 대조구보다 높았으며 조사선량의 증가에 따라 대체로 증가하였고, 저선량 조사에 의한 배추유식물체의 항산화효소 활성은 증가하였으나 낮은 선량에서 증가하였고 높은 선량에서는 감소하였다.가하였고 높은 선량에서는 감소하였다.

Keywords

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