Chinese Journal of Rice Science

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Biochemical and Physiological Characteristics in Seedlings Roots of Different Rice Cultivars under Low-Phosphorus Stress

LI Feng; LI Mu-ying; PAN Xiao-hua*; ZHU An-fan   

  1. (College of Agronomy; Jiangxi Agricultural University; Nanchang 330045; China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-01-10 Published:2004-01-10

不同水稻品种幼苗适应低磷胁迫的根系生理生化特性

李锋; 李木英; 潘晓华*; 朱安繁   

  1. 江西农业大学 农学院, 江西 南昌 330045

Abstract: With sandy culture, effect of low-phosphorus stress on membrane lipid peroxidation, protective enzyme system activity, and acid phosphatase(Apase) activity in rice seedlings roots of low-phosphorus-tolerant cultivars(Dalidao,Liantangzao 3) and low-phosphorus-sensitive cultivars(Huzhanqi, Xinshanbaili) were analyzed. Low-phosphorus stress aggravated the membrane lipid peroxidation in rice roots, enhanced SOD, CAT, POD and Apase activities. In low-phosphorus-tolerant cultivars, protective enzyme activity increased more greatly, while MDA and Apase activities less severely than those in low- phosphorus-sensitive cultivars.

Key words: rice, phosphorus, protective enzyme system, membrane lipid peroxidation, acid phosphatase

摘要: 利用砂培方法, 研究了耐低磷水稻品种(大粒稻、莲塘早3号)和低磷敏感水稻品种(沪占七、新三百粒)幼苗在低磷条件下根系的膜脂过氧化和保护酶系统活性,以及酸性磷酸酶活性的变化。低磷胁迫加剧水稻根系膜脂过氧化, 提高保护酶系统活性,耐低磷品种保护酶系统活性的增加幅度更大,丙二醛含量增加幅度小;低磷胁迫使根系中酸性磷酸酶活性升高,而低磷敏感品种上升幅度更大。

关键词: 水稻, 磷素, 保护酶系统, 膜脂过氧化, 酸性磷酸酶