Lai Hung-Yu, Lam Chun-Ming, Wang Wei-Zhe, Ji Ya-Jhu
Department of Post-Modern Agriculture, MingDao University, No. 369, Wenhua Rd., Peetow, Changhua County, 52345, Taiwan.
Bull Environ Contam Toxicol. 2017 Mar;98(3):317-322. doi: 10.1007/s00128-016-1874-8. Epub 2016 Jul 5.
Impatiens walleriana (I. walleriana), a potential cadmium (Cd) hyperaccumulator, can propagate by cuttings, which are less expensive to grow than seedlings. Different growth periods for cuttings, however, may lead to different physiological characteristics. In this study, I. walleriana cuttings were hydroponically grown in Cd-containing solutions (1.0-10.0 μM) for various growth periods (10-60 days). Experimental results showed that the Cd treatments had negative effects on growth compared to the controls that were not spiked with Cd. The extension of the growth period promoted most of the growth exhibitions of I. walleriana, except for SPAD readings for cuttings grown in the 5.0 and 10.0 μM solutions. The accumulation of Cd also increased over time, except in the roots of the cuttings grown in the 5.0 and 10.0 μM solutions. The subcellular distribution and chemical forms of Cd showed that I. walleriana developed better tolerance and detoxification capacities in the cuttings grown in the 5.0 and 10.0 μM solutions than in the cuttings grown in the other two Cd treatments.
何氏凤仙（Impatiens walleriana）是一种潜在的镉（Cd）超积累植物，可通过扦插繁殖，扦插苗的种植成本低于实生苗。然而，扦插苗的不同生长时期可能会导致不同的生理特性。在本研究中，将何氏凤仙扦插苗在含镉溶液（1.0 - 10.0 μM）中进行水培培养不同生长时期（10 - 60天）。实验结果表明，与未添加镉的对照相比，镉处理对生长有负面影响。除了在5.0和10.0 μM溶液中生长的扦插苗的SPAD读数外，生长时期的延长促进了何氏凤仙的大部分生长表现。镉的积累也随时间增加，除了在5.0和10.0 μM溶液中生长的扦插苗的根中。镉的亚细胞分布和化学形态表明，与在其他两种镉处理中生长的扦插苗相比，何氏凤仙在5.0和１０.０ μM溶液中生长的扦插苗具有更好的耐受性和解毒能力。
