小麦种子含锌量在幼苗中的分配与对缺锌敏感性的关系

RELATIONSHIP BETWEEN THE ZINC CONTENT IN SEEDS AND SENSITIVITY OF THE SEEDLINGS TO ZINC DEFFICIENCY

应用三个种子含锌量不同的小麦品系为实验材料，研究了在缺锌和供锌条件下锌在小麦幼苗中的分配规律。实验证明在缺锌的条件下，小麦幼苗植株含锌量与种子的含锌量成正相关。锌在三个品系小麦不同叶位中的分配规律是一致的，但种子含锌量低的小麦向幼叶中分配的锌量比例大。在供锌的条件下，种子含锌量高的品系地上部的总锌量比低锌品系高。

The Zn distributions in seedlings grown from three wheat lines that had different Zn content in their seeds were studied under Zn sufficient and Zn deficient conditions. Neutron activation analysis method was use to analyze the Zn concentration. Results showed that under Zn deficient condition the total Zn concentrations of the seedlings were parallel with the Zn concentration in the seeds. The seeds with low Zn transported relatively more Zn to the shoot (81% of the total Zn) than did the seeds with high Zn (54% of the total Zn). There was no effect on Zn concentration in different leaves. Under Zn sufficient condition the total Zn contents in the seedlings of the three lines were similar. Therefore seeds with high Zn content may be more resistant to Zn deficiency.