Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy.
Environmental Research Center, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy.
Plant Biol (Stuttg). 2024 Oct;26(6):1047-1056. doi: 10.1111/plb.13686. Epub 2024 Jul 6.
The tailings dump of Barraxiutta (Sardinia, Italy) contains considerable concentrations of heavy metals and, consequently, is scarcely colonized by plants. However, wild populations of the liverwort Lunularia cruciata (L.) Dum. form dense and healthy-looking carpets on this tailing dump. L. cruciata colonizing the tailing dump was compared with a control population growing in a pristine environment in terms of: (i) pollutant content, (ii) photochemical efficiency, and (iii) volatile secondary metabolites in thalli extracts. L. cruciata maintained optimal photosynthesis despite containing considerable amounts of soil pollutants in its thalli and had higher sesquiterpene content compared to control plants. Sesquiterpenes have a role in plant stress resistance and adaptation to adverse environments. In the present study, we propose enhanced sesquiterpenes featuring Contaminated L. cruciata as a defence strategy implemented in the post-mining environment.
意大利撒丁岛的 Barraxiutta 尾矿库含有相当高浓度的重金属，因此植物很少在此处生长。然而，野生的地钱属 Lunularia cruciata（L.）Dum. 却在这个尾矿库上形成了密集且健康的地毯。本研究比较了在尾矿库上生长的 L. cruciata 与在原始环境中生长的对照种群，从以下三个方面进行比较：（i）污染物含量，（ii）光化学效率，（iii）叶状体提取物中的挥发性次生代谢物。尽管 L. cruciata 的叶状体中含有相当数量的土壤污染物，但它仍保持着最佳的光合作用，并且与对照植物相比，其倍半萜含量更高。倍半萜在植物的抗胁迫和适应不利环境方面发挥作用。在本研究中，我们提出了增强的倍半萜类化合物，将其作为在矿山开采后的环境中实施的污染地钱的防御策略。
