植物营养与肥料学报2011，Vol.17Issue(5)：1050-1057,8.
不同铁形态对水稻根表铁膜及铁吸收的影响
Effect of different iron forms on iron plaque on root surface and iron uptake in rice seedlings
摘要
Abstract
Iron forms have great impacts on iron nutrition of rice seedlings, however, it remains unclear on how different iron forms influence iron uptake in rice seedlings. In this study, a hydroponic experiment was conducted to investigate the effects of FeCl2 and FeCl3 on iron uptake and iron plaque in rice seedlings. Results showed that the concentration of iron plaque on root surface under FeCl2 treatment was 197%-233% of that under FeCl3 treatment. Fe3^＋ and Fe2^＋ consisted of 85%-92% and 8%-15% of the total iron plaque respectively. The concentration of iron plaque on the root surface of Tianyou 998 （ Oryza sativa L. cv. TY998 ） was significantly higher than that in Peizataifeng （Oryza sativa L. cv. PZTF）. Iron uptake in TY998 was 115%-138% of that in PZTF. Treatment with FeCl2 increased the activity of rice roots by 24%-69%, while FeCl3 treatment by 16%-54%. The activities of SOD,POD and CAT in rice roots were increased by 11%-32%, 15%-30% and 30%-31% respectively under FeCl2 treatment, while they did not change obviously under FeCl3 treatment. The above results suggested that the addition of a certain concentration of iron enhanced the formation of iron plaque on root surface and iron uptake in rice seedlings. In comparison to FeCl3 treatment, FeCl2 treatment was conductive to the increase of activities of antioxidant enzymes, thus improved iron uptake in rice seedlings.关键词
水稻/铁形态/根表铁膜/铁吸收Key words
rice/iron forms/iron plaque on root surface/iron uptake分类
农业科技引用本文复制引用
傅友强,梁建平,于智卫,吴道铭,蔡昆争,沈宏..不同铁形态对水稻根表铁膜及铁吸收的影响[J].植物营养与肥料学报,2011,17(5):1050-1057,8.基金项目
国家自然科学基金项目 （）
国际科学基金 （）
农业部生态农业重点实验室开放基金项目资助. （）
