细胞分裂素在离体蒜苔内的运转

离体蒜苔饲喂带3H标记的6 — 苄基腺嘌呤(BA)后在暗中25℃下放置，分别在第 3、5、10、15、20天取样，进行放射性物质的分布分析。结果表明：(1) BA能沿着苔茎大量、长距离地上运，并在顶端的珠蒜中积累；(2) BA的这种运转具有很强的向顶极性；(3) 这种运转是一个平缓而稳定的过程，珠蒜中BA的积累与时间成较好的线性关系；(4) 顶端的珠蒜对BA的上运是必不可少的。根据以上结果，本文对蒜苔内BA的运转机理及意义进行了讨论。

Translocation of Benzyladenine in Excised Garlic Scapes

Excised garlic scapes treated with 3H-labelled 6-benzyladenlne (BA) were stored under 25℃ in the dark for respectively 8, 5, 10, 15, and 20 days before they were sampled. By mesuring the distribution of the 3H radioactivity lengthwise along these garlic scapes the following results were obtained: BA could translocate across a long distance to the apical cloves. After 20 days of storage when the scapes were completely senescent, up to 48% of the fed radioactivity accumulated in the cloves. This translocation showed a strong acropetal polarity, which appeared to be caused by the sink effect of the top cloves. The accumulation of 3H radioactivity in the garlic cloves was a steady progress, linear to the number of days, and synehronious with the senescent of the garlic scapes. From the above results, the significance and mechanism of BA translocation in garlic scapes were discussed