中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

籼粳杂交后代幼苗NH4＋吸收、同化的效率

安林昇；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:1991-06-05 发布日期:1991-06-05

Efficiency of NH4+ Uptake and Assimilation in the Indica × Japonica Hybrid Rice Seedlings

An Linsheng; Ni Jinshan   

  • Received:1900-01-01 Revised:1900-01-01 Online:1991-06-05 Published:1991-06-05

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摘要： 以籼稻广陆矮4号为母本与粳稻黄金光、笹锦为父本的杂交后代作试验材料。试验结果表明，籼粳杂交后代幼苗的生长大干它的亲本。杂交后代和它的亲本在NH4吸收速率上的差异为：母本（籼）>杂交后代>父本(粳)。杂交后代和母本在NH4吸收速率上的差异小于和父本的差异．可能母本对杂交后代在NH4吸收速率上的影响大于父本。NH4吸收的Km杂交后代<父本<母本。Im是母本>杂交后代>父本，但母本与杂交后代之间的差异较小。杂交后代NH4的吸收具有偏低的Km，偏高的Im，有较高的NH4吸收效率。NH4同化效率，杂交后代有杂种优势，比亲本高10%上下。

关键词: 杂交后代, 吸收速率, 杂种, 铵离子, 杂种优势

Abstract: The hybrid of indica rice (Guanglu'ai 4) and japonica rice (Koganehikari or Sasanishiki) were used as experimental materials. The results indicated as follows: The growth of indica× japonica hybrid was greater than that of its parental lines. The difference of NH4+ uptake rate between hybrid and parental lines is in following order: maternal line (indica rice) >hybrid>paternal line(japonica rice). The difference of NH4+ uptake rate between maternal line and hybrid is less than that between hybrid and paternal line. It seems that the maternal line has larger influence on the NH4+ uptake rate of hybrid as compared with paternal line. The Km of NH4+ uptake rate was in the order: hybridm was maternal line>hybrid>paternal line, but the difference between maternal line and hybrid was less. So hybrid had lower Km and higher Im and absorbed NH4+ efficiently. The heterosis of NH4+ assimilation efficiency was observed in hybrid rice, about 10% overthat of its paternal lines.

Key words: Indica-japonica hybrid, Ammonium uptake rate, Assimilation efficiency, Heterosis