目的 研究不同强度的白光、红光和蓝光对丹参根系形态和有效成分积累的影响。方法 分别利用4个光照强度的白光、红光和蓝光处理丹参植株，测定各处理组中丹参侧根数、侧根直径等根系形态学指标和7种有效成分的含量。结果 在选定的光强范围内，不同的光质对丹参地上部分形态指标的影响不同。100、200 μmol/（m²·s）的红光可以促进侧根的发生，200、300 μmol/（m²·s）的蓝光则可显著提高根生物量。不同成分的积累对光质和光强的响应不同，丹参酮类成分的合成积累较酚酸类成分对光响应更为敏感。结论 光对丹参根系形态和有效成分积累具有双重的调控作用，合理地利用光质和光强是提高丹参药材产量和品质的有效途径之一。

Objective Investigate the effects of different intensity of white light, red light and blue light on root morphology and bioactive compounds accumulations of Salvia miltiorrhiza. Methods The seedlings of S. miltiorrhiza were treated with 4 intensities of white light, red light and blue light, respectively, the morphologic index of root such as the lateral root number, lateral root diameter as well as the content of seven bioactive compounds were determined. Results The influences of different light quality on the above-ground morphological indexes of S. miltiorrhiza were distinct. Red light of 100 μmol/(m²·s) and 200 μmol/(m²·s) promoted the occurrence of lateral root, and blue light of 200 μmol/(m²·s) and 300 μmol/(m²·s) significantly increased the root biomass. The accumulation of different bioactive compounds was distinctly affected by light quality and light intensity, the accumulation of tanshinones was more sensitive to the light treatments than that of phenolic acids. Conclusion Light regulates the lateral root development and accumulations of bioactive compounds simultaneously, the application of artificial light is a promising method to improve the yield and quality of S. miltiorrhiza.

国家自然科学基金项目（31700257）；江苏省高校自然科学研究面上项目（16KJB180032）；中国博士后科学基金面上项目（2015M571826）；扬州大学大学生学术科技创新基金项目（x20170809，x20180661）；江苏省生物技术品牌专业