Dwarf bamboo is a woody plant with potential for use in the remediation of Pb-contaminated soil. Due to its clonal growth habit, there are two keys to its application for continuous soil Pb remediation: 1) its ability to form shoots and grow into new bamboo normally under Pb stress and 2) the Pb tolerance and accumulation characteristics of this new bamboo. Here, 5 species of dwarf bamboo were treated with 2 levels of soil Pb stress (0 and 1500 mg kg⁻¹). In the roots of 3 of the species (Sasa argenteostriata, Sasaella glabra, and Indocalamus decorus), Pb tended to be distributed along the cell wall and transported to vacuoles. In the other 2 species (Sasa auricoma and Sasa fortunei), Pb was arranged linearly along the cell wall. Under Pb treatment, the new bamboo of all species showed gradual physiological adaptation to Pb stress. Correlations of the net photosynthetic rate, superoxide dismutase activity, and free proline levels with Pb content in new leaves in November were all higher than those in July, though that of malondialdehyde content decreased, suggesting that new dwarf bamboo exhibits good soil Pb stress tolerance. Sasa argenteostriata and Indocalamus decorus consistently maintained higher antioxidant enzyme activities and free proline levels than the other species under Pb treatment, and the total biomass per pot of the new bamboo decreased the least compared to that in the Pb-free treatment for these two species. Therefore, these bamboo species may be used in the long-term continuous remediation of Pb-contaminated soil.

矮竹是一种木本植物，具有修复铅污染土壤的潜力。由于其无性系生长习性，其在土壤铅连续修复中的应用有两个关键：1）在铅胁迫下正常形成芽并长成新竹的能力；2）这种新竹的耐铅和积累特性。在这里，5 种矮竹被处理了 2 个水平的土壤铅胁迫（0 和 1500 mg kg ^-1）。在该物种中的 3 个物种（Sasa argenteostriata、Sasaella glabra和Indocalamus corus）的根中，Pb 倾向于沿着细胞壁分布并运输到液泡中。在其他 2 种（Sasa auricoma和Sasa Fortunei), Pb 沿细胞壁线性排列。在Pb处理下，所有树种的新竹对Pb胁迫均表现出逐渐的生理适应。11月新叶净光合速率、超氧化物歧化酶活性、游离脯氨酸水平与Pb含量的相关性均高于7月，但丙二醛含量下降，表明新矮竹表现出良好的土壤Pb胁迫耐受性。Sasa argenteostriata和Indocalamus Decorus与Pb处理的其他物种相比，始终保持较高的抗氧化酶活性和游离脯氨酸水平，与这两个物种的无铅处理相比，新竹每盆的总生物量下降最少。因此，这些竹种可用于铅污染土壤的长期连续修复。