Department of Plant Physiology, Faculty of Biology, Lomonosov Moscow State University, Moscow, Leninskiye gory 1/12, 119234, Russia.
Department of Plant Physiology, Faculty of Biology, Lomonosov Moscow State University, Moscow, Leninskiye gory 1/12, 119234, Russia.
J Plant Physiol. 2019 Mar-Apr;234-235:28-35. doi: 10.1016/j.jplph.2019.01.008. Epub 2019 Jan 15.
The role of the cell wall in short-term Ni uptake at different solution Ni levels was investigated in mung bean (Vigna radiata (L.) R. Wilczek) and wheat (Triticum aestivum L., cv. Inna). Both Ni-binding capacity of the CWs and roots are lower for wheat than for mung bean at all Ni levels in the solution. For both plants amounts of Ni associated with roots and root cell walls increased with Ni concentration. The contribution of CWs to Ni absorption by roots depends on Ni level in the medium and plant species. The Ni accumulated in CWs could account for total Ni content of roots (except for wheat in highest Ni treatment). Besides, mung bean plants employ the strategy of reducing Ni accumulation in the root CWs during exposure to excess but not toxic solution Ni level. According to the results, predominant Ni binding in the apoplast of mung bean and wheat roots is observed at both high and low external Ni, which suggests that apoplastic pathway is the main means of Ni transport in the root cortex of these species.
细胞壁在不同溶液镍水平下短期镍吸收中的作用在绿豆（Vigna radiata (L.) R. Wilczek）和小麦（Triticum aestivum L.，cv. Inna）中进行了研究。在溶液中的所有镍水平下，小麦的细胞壁和根的镍结合能力均低于绿豆。对于两种植物，与根和根细胞壁相关的镍量随着镍浓度的增加而增加。细胞壁对根吸收镍的贡献取决于介质中的镍水平和植物种类。积累在细胞壁中的镍可以解释根的总镍含量（除了在最高镍处理下的小麦）。此外，绿豆植物在暴露于过量但非毒性溶液镍水平下，采用了减少根细胞壁中镍积累的策略。根据结果，在高和低外部镍的情况下，均观察到绿豆和小麦根质外体中主要的镍结合，这表明质外体途径是这些物种根皮层中镍运输的主要途径。
