Mirabilis jalapa L. was identified as a cadmium (Cd) hyperaccumulator, but data were mainly from laboratory conditions. The main aim of the present study was to confirm whether M. jalapa is a Cd hyperaccumulator by field survey and laboratory experiment. The field survey was conducted at 3 sites and 66 samples were collected, and the results showed that although M. jalapa did not exhibit any visible damage when growing on soil containing 139 mg Cd kg-1, a low concentration of Cd (11.85 ± 3.45 mg kg-1) in its leaves was observed. Although the translocation factor (TF) was up to 3.24 ± 0.42, the bioconcentration factor (BCF) was only 0.13 ± 0.07. The Cd accumulation in leaves of Lanping (LP, contaminated site) and Kunming (KM, clean site) populations reached 93.88 and 81.76 mg kg-1 when artificially spiked soil Cd was 175 mg kg-1, respectively. The BCFs of LP and KM populations were 0.55 and 0.48, and the TFs of the two populations were 3.98 and 4.15, respectively. Under hydroponic condition, the Cd concentration in young leaves of LP and KM populations was 78.5 ± 0.8 and 46.3 ± 1.2 mg kg-1 at 5 mg L-1 Cd treatment, respectively. Furthermore, a significantly positive correlation between tissue Cd concentration and total Cd, CaCl2-extractable Cd, and TCLP-Cd (toxicity characteristic leaching procedure) in soil was established. Therefore, M. jalapa had constitutional characteristics for Cd tolerance and accumulation, but it was not a Cd hyperaccumulator.

中文翻译：

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对Mirabilis jalapa L.中镉积累的重新调查：来自现场和实验室的证据。

紫茉莉（Mirabilis jalapa L.）被鉴定为镉（Cd）超富集物，但数据主要来自实验室条件。本研究的主要目的是通过野外调查和实验室实验来确认贾拉帕木霉是否为镉超积累物。在3个地点进行了实地调查，收集了66个样品，结果表明，尽管贾拉帕分枝杆菌在含139 mg Cd kg-1的土壤上生长时没有任何可见的损害，但Cd的浓度较低（11.85±3.45在其叶子中观察到mg-1）。尽管转运因子（TF）高达3.24±0.42，但生物浓缩因子（BCF）仅为0.13±0.07。当人工加标土壤镉为175 mg kg-1时，兰坪（LP，受污染地点）和昆明（KM，清洁地点）种群的叶片中Cd积累分别达到93.88和81.76 mg kg-1。LP和KM种群的BCF分别为0.55和0.48，两个种群的TF分别为3.98和4.15。在水培条件下，在5 mg L-1 Cd处理下，LP和KM种群的幼叶中Cd浓度分别为78.5±0.8和46.3±1.2 mg kg-1。此外，建立了土壤中组织Cd浓度与总Cd，CaCl2可萃取Cd和TCLP-Cd（毒性特征浸出程序）之间的显着正相关。因此，M。jalapa具有Cd耐性和累积的构造特征，但它不是Cd的高积累者。在5 mg L-1 Cd处理下分别为2 mg kg-1。此外，建立了土壤中组织Cd浓度与总Cd，CaCl2可萃取Cd和TCLP-Cd（毒性特征浸出程序）之间的显着正相关。因此，M。jalapa具有Cd耐性和累积的构造特征，但它不是Cd的高积累者。在5 mg L-1 Cd处理下分别为2 mg kg-1。此外，建立了土壤中组织Cd浓度与总Cd，CaCl2可萃取Cd和TCLP-Cd（毒性特征浸出程序）之间的显着正相关。因此，M。jalapa具有Cd耐性和累积的构造特征，但它不是Cd的高积累者。