Guo Sai, Pan Rubin, Zhang Yan, Gu Quanwei, Shen Qirong, Yang Jian, Huang Luqi, Shen Zongzhuan, Li Rong
The Sanya Institute of the Nanjing Agricultural University, Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-Saving Fertilizers, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China.
State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
Environ Microbiome. 2025 Feb 4;20(1):18. doi: 10.1186/s40793-025-00680-y.
Salvia miltiorrhiza is a highly valuable medicinal plant and its cultivation is constrained by limited suitable land. Long-term continuous cropping practices alleviate limitations in planting area as well as causes the decline in plant yield and quality. Endophytic microorganisms colonize inside plant roots and are known to play important roles in improving the performance of model plants (such as Arabidopsis thaliana) and food crops (such as wheat, soybean, rice and maize). However, the understanding of how medicinal plants with different growth status (i.e., healthy and disease) shape the assembly of root-endophytic microorganisms and the functional importance of these microorganisms in improving plant performance remains largely unknown.
Here, we investigated the assembly of root-endophytic microorganisms in medicinal plants with different growth status and its links with plant performance improvement. We found that medicinal plants with different growth status had distinct root-endophytic bacterial communities. Healthy plant roots recruited some potentially beneficial bacteria partners, particularly Pseudomonas into the endosphere. We further investigated the functional importance of these potentially beneficial bacteria on plant performance in subsequent greenhouse and field experiments. We found that root-endophytic Pseudomonas effectively increased medicinal plant seedling growth, crop yield, and the content of effective medicinal components.
Taken together, we demonstrate that healthy medicinal plants can form a distinct root-endophytic bacterial community, leading to an increase in plant growth-promoting endophytic bacteria (PGPEB) that contribute to the improvement of crop growth and quality. Our research provides valuable insights into the significant role of PGPEB in enhancing crop growth and improving medicinal plants quality for human health development in the future.
丹参是一种极具价值的药用植物，其种植受到适宜土地有限的限制。长期连作在缓解种植面积限制的同时，也导致了植物产量和品质的下降。内生微生物定殖于植物根部内部，已知在改善模式植物（如拟南芥）和粮食作物（如小麦、大豆、水稻和玉米）的性能方面发挥重要作用。然而，对于不同生长状态（即健康和患病）的药用植物如何塑造根内生微生物群落的组装以及这些微生物在改善植物性能方面的功能重要性，人们仍知之甚少。
在此，我们研究了不同生长状态药用植物根内生微生物的组装及其与植物性能改善的联系。我们发现，不同生长状态的药用植物具有不同的根内生细菌群落。健康植物的根招募了一些潜在有益的细菌伙伴，特别是假单胞菌进入内生菌圈。我们在随后的温室和田间实验中进一步研究了这些潜在有益细菌对植物性能的功能重要性。我们发现根内生假单胞菌有效地增加了药用植物幼苗的生长、作物产量和有效药用成分的含量。
综上所述，我们证明健康的药用植物可以形成独特的根内生细菌群落，导致促进植物生长的内生细菌（PGPEB）增加，这有助于改善作物生长和品质。我们的研究为PGPEB在促进作物生长和提高药用植物品质以促进未来人类健康发展方面的重要作用提供了有价值的见解。
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