磷胁迫对水稻基因型根系形态及吸收铁锰铜锌的影响  

Effect of P stress on morphology of rice roots and uptake of Fe, Mn, Cu, Zn by four rice genotypes

作　　者：刘文菊[1] 张西科[1] 尹君[1] 毕淑琴[1] 甄兰[1] 

机构地区：[1]河北农业大学资源环境学院,河北保定071001

出　　处：《生态环境》2003年第1期49-51,共3页Ecology and Environmnet

基　　金：国家自然科学基金项目(39570427)

摘　　要：采用营养液培养方法研究了缺磷胁迫下4种水稻基因型(90-90-1、金23A、90-68-1、CDR22)的根系形态变化情况及其吸收微量元素铁、锰、铜、锌的影响。结果表明,(1)磷胁迫下,每个基因型在磷胁迫下其根系形态发生了明显变化,如根长、根冠比均呈增加趋势,并且根表有红棕色铁氧化物膜包被。(2)磷胁迫下根系形态的变化影响了水稻对生长介质中铁、锰、铜、锌的吸收:正常水稻植株中铁、锰、锌的含量高于磷胁迫植株,其中磷营养状况对水稻吸收铁、锰影响最明显;而磷营养状况对水稻植株铜含量的影响与铁、锰、锌正好相反,且影响程度较小。Solution Culture was conducted to investigate effect of P stress on rice growth and uptake of metal microelements by different rice genotypes. The results indicated that root length, ratio of root to shoot without P treatment of each rice genotype were larger than with P treatment of rice seedlings. In addition, iron oxides plaque formed on the surface of the rice roots in P stress. Fe, Mn, Zn content in rice shoot of P deficiency were lower than normal rice seedling. There was not more effect on Cu content of different rice genotypes and P stress. Genotype-90-68-1 has stronger adapt-ability in condition of P stress.

关 键 词：磷胁迫 水稻基因型 铁 锰 铜 锌 根系 

分 类 号：S511.06[农业科学—作物学] S153