中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

不同籼稻品种整株幼苗根系K+吸收和H+释放的关系：一种筛选高效K+吸收水稻品种的方法

谢少平；倪晋山   

  1. 中国科学院上海植物生理研究所，上海200032
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1990-03-17 发布日期:1990-03-17

Correlation between K+ Influx and H+ Efflux by Roots of Intact Seedlings of indica Rice Varieties: A Method for Screening Efficient K+-uptaking Lines

Xie Shaoping; Ni Jinshan   

  • Received:1900-01-01 Revised:1900-01-01 Online:1990-03-17 Published:1990-03-17

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摘要： 在0.2 mmol/L CaS04溶液中培养的不同籼稻品种低盐幼苗根系在1.0 mmol/L KCl和0.5 mmol/L K2SO4介质中的K+吸收和H+释放之间均呈非常显著的直线相关性。线性相关的斜率因测定方法而有所变化，但相关性意义不变。水稻在KCl介质的K＋吸收速率比在K2SO4介质中的大， 但前者对应的H+释放速率却比后者的小，且K＋吸收速率间没有对应的显著性相关意义。实验结果表明，虽然可以用直接测定吸收介质的酸化程度作为一种简捷的筛选高效K+吸收水稻品种的方法，但必须根据实际情况选用吸收介质。

关键词: 籼稻, 根系, 钾素, 筛选方法, 植物营养, 吸收效率

Abstract: The relation between K+ influx and H+ efflux by roots of low-salt indica rice varieties cultured in 0.2 mmol/L CaSO4 solution was studied. The linear correlations between K+ influx and H+ efflux in both 1.0mol/L KCl and 0.5mol/L K2SO4 media were highly significant The rates of K+ influxes by indica rice varieties were greater in KCl medium than those in K2SO4 medium, but rates of H+ effluxes were reverse. There was no corresponding relation between the rates of K+ influx or H+ efflux in both media. The above results indicated that the measurement of actdication of uptake medium (i. e. pH values decrease) could be used as a simple method for screening efficient K+ uptaking indica rice cultivars. but the uptake medium should be selectively used according to the field comditions.

Key words: indica rice, Roots: Potassium, Screening method, plant nutrition, uptake efficiency