Gao Jun, Meng Ping, Zhao Yan, Zhang Jinsong, He Chunxia, Wang Qirui, Cai Jinfeng
Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China.
Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forest University, Nanjing 210037, China.
Plants (Basel). 2023 Sep 6;12(18):3189. doi: 10.3390/plants12183189.
Medicinal plants accommodated by understory habitats can easily suffer over-exploitation in the heavy harvest of natural products. It is necessary to develop a sustainable cultural protocol to provide high-quality stocks for efficient regeneration. Drought places stress on medicinal plants during their culture by limiting new sprout growth and reducing the quality of medicinal extracts. Artificial mediating approaches should be considered in a sustainable regime of medicinal plant culture to test the potential tradeoff between resistance to drought and production ability. In this study, seedlings were raised in three light-emitting diode (LED) spectra from red (71.7% red, 14.6% green, 13.7% blue), green (26.2% red, 17.4% green, 56.4% blue), and blue (17.8% red, 33.7% green, 48.5% blue) lights. Mown seedlings were subjected to a simulated drought event. Drought stressed the seedlings by reducing the growth, dry mass, nitrogen (N) uptake, and oridonin content. Mowing increased the oridonin content but decreased total C and N accumulation and the δC level. The red light benefitted starch accumulation only under the well-watered condition, and the green light induced an upregulation of δC but decreased antioxidant activity. Oridonin content was negatively associated with combined δC and catalase activity. Overall, either mowing or blue light can be recommended for the culture of to increase oridonin content, alleviating some of the negative consequences of drought.
林下生境中的药用植物在天然产物大量采收时极易遭受过度开发。有必要制定一种可持续的栽培方案，以提供高质量的植株用于高效再生。干旱在药用植物栽培过程中对其造成压力，限制新梢生长并降低药用提取物的质量。在药用植物栽培的可持续模式中应考虑人工调节方法，以测试抗旱性与生产能力之间的潜在权衡。在本研究中，幼苗在三种发光二极管（LED）光谱下培育，分别是红色（71.7% 红色、14.6% 绿色、13.7% 蓝色）、绿色（26.2% 红色、17.4% 绿色、56.4% 蓝色）和蓝色（17.8% 红色、33.7% 绿色、48.5% 蓝色）光。对割取的幼苗进行模拟干旱处理。干旱通过降低生长、干质量、氮（N）吸收和冬凌草甲素含量对幼苗造成压力。割取增加了冬凌草甲素含量，但降低了总碳和氮积累以及δC水平。红光仅在水分充足的条件下有利于淀粉积累，绿光诱导δC上调但降低抗氧化活性。冬凌草甲素含量与δC和过氧化氢酶活性的综合水平呈负相关。总体而言，割取或蓝光均可推荐用于[植物名称未给出]的栽培，以增加冬凌草甲素含量，减轻干旱带来的一些负面后果。
