인위적인 토양 pH 변화가 식물에 미치는 영향과 식물의 생화학적 방어반응을 조사하고자 황산용액을 첨가하여 산성화시킨 토양(pH 5.3, 4.5, 3.9, 3.5)에 만수국을 이용하여 실험을 수행하였다. 토양 산성화에 의해 MDA 함량이 크게 증가되었다. 토양의 $H^{+}$ 부하량 증가에 따라 산화형인 DHA 및 GSSG의 함량이 크게 증가되었다. 항산화 효소의 활성도 토양의 $H^{+}$ 부하량의 증가에 따라 증가하는 것으로 나타났다.
To investigate the effects of soil pH on plants, the seedlings of french marigold (Tagetes patula L.) was transplanted into the soils acidified with $H_{2}SO_{4}$ solutions (pH 5.3, 4.5, 3.9, 3.5). The level of malondialdehyde was significantly increased by soil acidification. As the pH levels decreased from 5.3 to 3.5, the contents of dehydroascorbate and oxidized glutathione of the plant were significantly increased. The antioxidative enzyme activities of the plant affected by soil acidification were increased as the pH decreased.
