利用盆栽方法,比较研究了盐碱胁迫下水稻耐碱突变体(ACR78)及其野生型植株体内K+、Na+、Ca2+、Mg2+、Fe2+和Zn2+含量的变化.结果表明,盐碱胁迫下,ACR78全株Na+总含量比野生型减少2.9%,显著低于野生型.同时,其+、Zn2+和Mg2+含量比野生型分别增加18.3%,89.7%和4.9%(P<0.05),全株K+/Na+比值(0.16)显著高于野生型(0.13).从器官水平看,ACR78茎中K+/Na+比值极显著高于野生型,约为野生型的1.4倍.ACR78根和茎中Na+含量显著低于野生型(14.0%和.9%),其茎中K+含量比野生型增加32.3%,根和叶中无显著性差异.ACR78根和茎中Zn2+含量分别比野生型增加44.2%和202.7%,Mg2+含量在器官中的分配规律与Na+相反.说明ACR78可显著抑制Na+的吸收,并对K+、Zn2+和Mg2+具有较强的选择性吸收能力.
The content change of K+,Na+,Ca2+,Mg2+, Fe2+and Zn2+ of alkaline tolerant rice mutant(ACR 78) and its wild type were compared analysis by pot culture.The results showed that the total Na+ content of ACR78 was 2.9 % lower than that of the wild type,and the K+,Zn2+ and Mg2+ content of ACR78 were 18.3 %, 89.7 %and 4.9 %(P <0.05)higher than that of the wild type respectively.The ratio of K+ and Na+ in stem of ACR78 was approximately 1.4 times of the wild type,the difference was very significant.The Na+ content in root and stem of ACR78 were significantly lower than that of the wild type(14.0 % and 5.9 % respectively),and the K+ content in stem of ACR78 was 32.3 % higher than the wild type,but the content in root and stem were no difference.The Zn2+ content in root and stem of ACR78 were 44.2 % and 202.7 % higher than the wild type respectively.The distribution law of Mg2+ content in organs was opposite to the Na+ content.The results indicated that ACR78 could significantly inhibit the uptake of Na+ and had the ability of selective uptake to K+, Zn2+ and Mg2+.
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