Abstract：
Plants have a memory function for the environmental stress they have suffered. When they are subjected to repeated environmental stress, they can quickly and better activate the response and adaptation mechanism to environmental stress, thus realizing long-term stable reproduction. However, most of the relevant studies are applied to crops and Arabidopsis thaliana rather than medicinal plants about the improvement of plant growth status and the effect on phytoalexin biosynthesis. In this study, yeast extract(YE) was used as an elicitor to simulate biotic stress, and the changes in biomass and the content of some secondary metabolites were measured by giving repeated stresses to Sorbus aucuparia suspension cell(SASC). The results showed that the accumulation levels of biomass and some secondary metabolites in SASC subjected to repeated stress are significantly increased at some time points compared with single stress. A phenomenon that SASC can memorize biotic stress is confirmed in this study and influences phytoalexin accumulation in SASC. Furthermore, the work laid the groundwork for research into the transgenerational stress memory mechanism of medicinal plant.
摘要：
植物对它们所遭受的环境压力具有记忆功能。当他们受到反复的环境压力时，它们可以快速更好地激活对环境压力的反应和适应机制，从而实现长期稳定繁殖。然而,关于植物生长状态的改善和对植物抗毒素生物合成的影响，大多数相关研究应用于作物和拟南芥，而不是药用植物。在这项研究中,酵母提取物（YE）被用作模拟生物胁迫的诱导子，通过对SASC悬浮细胞（SASC）进行反复胁迫，测量生物量和某些次生代谢产物含量的变化。结果表明，与单一胁迫相比，重复胁迫下SASC的生物量和一些次生代谢产物的积累水平在某些时间点显著增加。本研究证实了SASC可以记忆生物胁迫的现象，并影响SASC中植物抗毒素的积累。此外，这项工作为研究药用植物的跨代应激记忆机制奠定了基础。
