---

作 者 ：蔡妙珍;林咸永;罗安程;章永松

期 刊 ：植物营养与肥料学报 2002年 8卷 1期 页码：96-99

关键词：过量Fe2+；水稻；生长；叶绿素；抗氧化酶；

摘 要 ：通过溶液培养研究了不同浓度氧化亚铁 (Fe²⁺)胁迫对水稻的生长、叶绿素含量及抗氧化酶活性的影响。结果表明 ,高浓度的Fe²⁺ 胁迫明显抑制水稻地上部和根系的生长、降低下位叶片叶绿素含量。当介质中Fe²⁺浓度过高时 ,水稻植株体内过氧化物酶 (POD)、过氧化氢酶 (CAT)和硝酸还原酶 (NR)活性明显受抑。然而 ,低浓度Fe²⁺胁迫时 ,上述酶活性反而提高 ,这可能是水稻抵御亚铁毒害的一种适应性机制。

Abstract:A solution culture experiment was conducted to study the effects of different concentrations of Fe²⁺ on the growth, chlorophyll content and activities of POD, CAT and NR in rice plant. The results showed that high ferrous oxide inhibited obviously growth of shoot and root , and chlorophyll content decreased in the lower leaves along with increasing of the concentration of Fe²⁺ in the solution. The activities of POD, CAT and NR were significantly decreased under higher Fe²⁺ stress. Under lower Fe²⁺ stress, however, the activities of POD, CAT and NR increased, which might be regarded as a mechanism of rice resistance to ferrous oxide toxicity.

---