Polyamine concentrations were determined in leaves and roots of tobacco plants (Nicotiana tabacum L.) subjected to a short-term boron deficiency. A decrease in the growth of shoots and, especially, roots was found under this mineral deficiency. Boron deficiency did not lead to a significant decrease in leaf or root ion concentrations when compared to control treatment; however, as expected, leaf boron concentration was lower in boron-deficient plants in comparison to the control. In leaves, the levels of free putrescine and spermidine were similar in both treatments. In roots, a short-term boron deficiency caused an increase in free putrescine. Moreover, boron-deficient plants had higher conjugated polyamine concentration than boron-sufficient plants, which was especially evident for conjugated putrescine in leaves. A possible link between boron and polyamine levels is proposed and discussed.

中文翻译：

---

硼缺乏会增加烟草植物中的腐胺水平

在短期缺硼的烟草植物 (Nicotiana tabacum L.) 的叶和根中测定多胺浓度。在这种矿物质缺乏的情况下，发现枝条，尤其是根部的生长减少。与对照处理相比，缺硼不会导致叶或根离子浓度显着降低；然而，正如预期的那样，与对照相比，缺硼植物的叶硼浓度较低。在叶子中，两种处理中游离腐胺和亚精胺的水平相似。在根部，短期缺硼会导致游离腐胺增加。此外，缺硼植物比含硼植物具有更高的共轭多胺浓度，这对于叶子中的共轭腐胺尤为明显。