Institute of Applied Microbiology, College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China.
Department of Food Science and Technology, University of Nebraska Lincoln, Lincoln, NE 68588, USA.
J Hazard Mater. 2023 Feb 5;443(Pt A):130186. doi: 10.1016/j.jhazmat.2022.130186. Epub 2022 Oct 14.
Exopolysaccharides (EPS) are macromolecules with environment beneficial properties. Currently, numerous studies focus on the absorption of heavy metals by EPS, but less attention has been paid to the effects of EPS on the plants. This study explored the effects of EPS from Lactobacillus plantarum LPC-1 on the structure and function of cell walls in rice seedling roots under cadmium (Cd) stress. The results showed that EPS could regulate the remodeling process of the cell walls of rice roots. EPS affects the synthesis efficiency and the content of the substances that made up the cell wall, and thus plays an essential role in limiting the uptake and transport of Cd in rice root. Furthermore, EPS could induce plant resistance to heavy metals by regulating the lignin biosynthesis pathway in rice roots. Finally, the cell wall remodeling induced by EPS likely contributes to plant stress responses by activating the reactive oxygen species (ROS) signaling.
胞外多糖（EPS）是具有环境有益特性的高分子化合物。目前，大量研究集中在 EPS 对重金属的吸收上，但对 EPS 对植物的影响关注较少。本研究探讨了在镉（Cd）胁迫下，植物乳杆菌 LPC-1 的 EPS 对水稻幼苗根细胞壁结构和功能的影响。结果表明，EPS 可以调节水稻根细胞壁的重塑过程。EPS 影响细胞壁物质的合成效率和含量，因此在限制水稻根对 Cd 的吸收和运输方面发挥着重要作用。此外，EPS 可以通过调节水稻根中的木质素生物合成途径诱导植物对重金属的抗性。最后，EPS 诱导的细胞壁重塑可能通过激活活性氧（ROS）信号来促进植物的应激反应。
