| 刊名 | Medicinal Plant |
| 作者 | Xiaoqian XIONGΔ, Xiaojian GONGΔ, Tianhua YU, Xue YANG, Wanyun WU, Zhannan YANG*, Chao ZHAO* |
| 作者单位 | Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guiyang 550025, China |
| DOI | DOI:10.19600/j.cnki.issn2152-3924.2026.010.006 |
| 年份 | 2026 |
| 刊期 | 1 |
| 页码 | 30-33，39 |
| 关键词 | Endophytic bacteria, Emilia prenanthoidea DC., Plant growth promotion, Flavonoid metabolism, Antioxidant enzymes, ROS homeostasis, Medicinal plant improvement |
| 摘要 | [Objectives] To assess the effects of endophytic bacteria on the growth, antioxidant responses, and and the production of key secondary metabolites in Emilia prenanthoidea DC. [Methods] Three endophytic strains (H1, H2, L1) were inoculated onto tissue-cultured seedlings and cultivated for 20 d under greenhouse conditions. Growth traits, reactive oxygen species (ROS) indicators, antioxidant enzyme activities, and the content of chlorogenic acid and quercetin were analyzed using one-way ANOVA followed by Tukey’s test. [Results] Bacterial inoculation significantly enhanced plant performance. Treatment H2 increased plant height by 27%, chlorophyll content by 73%, and fresh weight by 31%. Levels of ROS (O2-, H2O2) and MDA decreased markedly, whereas the activities of POD and CAT increased. Additionally, the content of chlorogenic acid and quercetin increased by up to 67% and 64%, respectively, with both H2 and L1 treatments showing the most pronounced effects. [Conclusions] Endophytic bacteria markedly improve growth, redox balance, and phenolic accumulation in E. prenanthoidea. Strain H2 represents a promising bioinoculant for improving the medicinal quality of this species. |
