过量Fe^(2+)对水稻生长和某些生理性状的影响  

Effects of excessive Fe^(2+) on growth and physiological characters of rice

作　　者：蔡妙珍[1] 林咸永[1] 罗安程[1] 章永松[1] 

机构地区：[1]浙江大学环境与资源学院资源科学系,浙江杭州310029

出　　处：《植物营养与肥料学报》2002年第1期96-99,共4页Journal of Plant Nutrition and Fertilizers

基　　金：浙江省自然科学基金项目 ( 399481)

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。A solution culture experiment was conducted to study the effects of different concentrations of Fe 2+ 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 Fe 2+ in the solution. The activities of POD, CAT and NR were significantly decreased under higher Fe 2+ stress. Under lower Fe 2+ stress, however, the activities of POD, CAT and NR increased, which might be regarded as a mechanism of rice resistance to ferrous oxide toxicity.

关 键 词：水稻 生长 叶绿素 过氧化酶 氧化亚铁过量 铁胁迫 铁毒 

分 类 号：S511[农业科学—作物学]