Zhang Chengbin, Geng Ningbo, Dai Yubing, Ahmad Zia, Li Yun, Han Shuai, Zhang Haijun, Chen Jiping, Yang Jiajia
College of Materials Science and Engineering, Hebei University of Engineering, Handan, 056038, China.
CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
Environ Sci Pollut Res Int. 2023 Apr;30(16):46355-46367. doi: 10.1007/s11356-023-25508-5. Epub 2023 Jan 31.
Rare earth elements (REEs) are considered environmental pollutants that have received extensive attention recently. The accumulation of REEs in plants is important because REEs can eventually enter the human body via the food chain. Marigolds are widely utilized as medicinal and commercial plants in medicine, feed, and therapeutics. Due to the extremely high demand for marigold in global, it is urgent to investigate the accumulation and distribution of REEs in marigold plants to reduce human and animal health risks. Marigold leaves tended to bioaccumulate the highest amounts of REEs from soil compared with other tissues. The distribution patterns of REEs in marigold were similar to those in the rhizosphere soil, which was enriched in light rare earth elements. Cerium accumulated most in marigold and soil, accounting for nearly 50% of ΣREEs, followed by lanthanum, neodymium, and yttrium. Roots were the most susceptible tissue affected by soil REE concentration, and a significant positive correlation was observed for REEs in the roots of marigold and soils (R = 0.87), while no significant correlation was observed for REEs in soils and other tissues. REEs were poorly transferred from soil to marigold, with bioaccumulation factor values for all tissues of marigold less than one. Additionally, REEs exhibited a positive correlation with Al and Fe in the roots, stems, leaves, and flowers of marigold. The present research revealed the biological interactions between marigold and soil and the distribution of REEs in various parts of marigold. It provides a reference for large-scale commercial cultivation and potential environmental risk in the future.
稀土元素（REEs）被认为是环境污染物，近年来受到广泛关注。稀土元素在植物中的积累很重要，因为稀土元素最终会通过食物链进入人体。万寿菊作为药用和商业植物，广泛应用于医药、饲料和治疗领域。由于全球对万寿菊的需求极高，迫切需要研究稀土元素在万寿菊植株中的积累和分布情况，以降低对人类和动物健康的风险。与其他组织相比，万寿菊叶片往往从土壤中生物积累最高量的稀土元素。万寿菊中稀土元素的分布模式与根际土壤相似，根际土壤富含轻稀土元素。铈在万寿菊和土壤中积累最多，占总稀土元素的近50%，其次是镧、钕和钇。根是受土壤稀土元素浓度影响最敏感的组织，万寿菊根中的稀土元素与土壤中的稀土元素呈显著正相关（R = 0.87），而土壤与其他组织中的稀土元素没有显著相关性。稀土元素从土壤向万寿菊的转移较差，万寿菊所有组织的生物积累因子值均小于1。此外，稀土元素在万寿菊的根、茎、叶和花中与铝和铁呈正相关。本研究揭示了万寿菊与土壤之间的生物相互作用以及稀土元素在万寿菊各部位的分布情况。它为未来大规模商业种植和潜在环境风险提供了参考。
