한국잔디의 환경스트레스에 대한 산화적 손상 비교 = Comparison of Oxidative Damage in Zoysiagrass (Zoysia spp.) with Environmental Stress

다국어 초록 (Multilingual Abstract)

Drought, salt, shade and low temperature is an important environmental stress that adversely affects plant growth and causes a reduction in growth. The study was conducted to clarify the different of oxidative damage to environmental stress with basic species and medium-leaf type of zoysiagrass. Electrolyte leakage(EL), malondialdehyde(MDA) and hydrogen peroxide(H2O2) concentration were determined. This result indicated that low levels of EL, MDA and H2O2 concentration with drought stress for Z. sinica and medium-leaf type of zoysiagrass than Z. japonica and Z. matrella, these has tended to drought-tolerant. Also Z. sinica and medium-leaf type of zoysiagrass decreased the EL, MDA and H2O2 concentration during salt stress, which was investigated for salt-tolerant. In the shade stress conditions were significantly a reduction of MDA and H2O2 concentration in medium-leaf type of zoysiagrass. The findings that decrease of MDA and H2O2 concentration with low temperature stress in medium-leaf type of zoysiagrass. In this study, we investigated the different response of oxidative damage to environmental stress, results indicated that environmental tolerance was higher medium-leaf type than basic species of zoysiagrass. Medium-leaf type zoysiagrass can be utilized for turfgrass breeding of high quality, which needs to be investigated further research at the molecular level.

국문 초록 (Abstract)

한국잔디의 기본종과 중간적인 형태특성을 보이는 교잡종의 건조, 염, 약광, 저온 등과 같은 환경스트레스에 대한 차이를 알아보기 위해 전해질 유출과 MDA와 과산화수소(H2O2) 농도 변화를 조사하였다. 건조스트레스를 가했을 경우 들잔디와 금잔디가 갯잔디와 중엽형 잔디에 비해 전해질 유출과 MDA 농도가 증가하였고, H2O2 농도는 들잔디가 유의적으로 증가하였다. 염스트레스를 처리했을 때에는 들잔디와 금잔디가 갯잔디와 중엽형 잔디에 비해 전해질 유출과 MDA 농도가 증가하였으며, H2O2 농도 금잔디가 크게 증가하는 것으로 나타났다. 약광스트레스를 처리했을 때에는 갯잔디가 전해질 유출, MDA와 H2O2 농도가 높게 나왔다. 저온스트레스를 가했을 경우에는 갯잔디가 전해질 유출과 H2O2 농도가 높았고, 금잔디는 MDA 농도가 높게 나타났다. 4가지 스트레스를 가했을 때 염스트레스에서는 갯잔디가 내성이 높았지만, 건조, 약광과 저온스트레스에서는 중엽형 잔디가 높은 내성을 보였다. 이와 같이 한국잔디 종내에서도 환경스트레스에 대한 반응 정도가 다르게 나타났으며, 한국잔디의 기본종에 비해 중엽형 한국잔디가 내환경성이 높은 경향을 보여 우수한 내환경성 잔디 개발을 위한 육종 재료로서의 가치가 높고, 중엽형 한국잔디에 대한 연구가 필요할 것으로 사료되었다.

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