酸铝对杉木磷吸收和代谢的影响

IFLUENCE OF ACID ALUMINUM ON ABSORPTION AND METABOLISM OF PHOSPHORUS IN CHINESE FIR

用3 2 P示踪原子法通过水培试验研究了酸性条件下铝对 1年生杉木的根和叶磷吸收和代谢的影响。结果表明 ,在pH =3时 ,用酸铝处理根和叶后 ,根中3 2 P 无机磷增加到对照的 1 95 % ,叶片3 2 P 无机磷转运指数由 43 0降低到 2 0 0。根的P总含量中的各3 2 P 化合物比例发生较大变化 ,无机磷增加到对照的 1 75 % ,有机化合物、脂类化合物、DNA、RNA分别减少到对照的 5 5 % ,42 % ,36 % ,40 % ;叶中各3 2 P化合物的比例除DNA降低外 (82 % ) ,其它变化不大。

The influence of acid\|aluminum on the absorption and metabolism of the one\|year\|old chinese fir root and leaf was studied using isotope atom indicator 32 P with water culture. The results showed that after the treatment of the acid\|aluminum(pH=3), the absorption of 32 P\|inorganic phosphorus in root increased to 195% of the CK, the transport index of the 32 P\|phosphorus in the leaf decreased from 43.0 to 20.7. The proportion of the 32 P\|compounds in the root changed, 32 P\|inorganic compounds increased to 175% of the CK, and 32 P\|organic compounds, Lipid, DNA and RNA decreased to 55%,42%,36% and 40%, respectivily. The change of the proportion of the 32 P\|compounds in the leaf was not evident, except the DNA.