Department of Agricultural Plant Science, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 52828, South Korea.
Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 52828, South Korea.
Sci Rep. 2018 Dec 20;8(1):18009. doi: 10.1038/s41598-018-36113-9.
In this report, we have investigated the influence of different light qualities on Digitalis purpurea under a controlled environment. For this purpose, red (R), blue (B), fluorescent lamp (FL, control), along with combined red and blue (R:B) LEDs were used. Interestingly, the plant growth parameters such as number of leaf, longest root, width of leaf, width of stomata, width of trichome, leaf area, leaf or root fresh weight (FW), weight (DW) as well as length of trichome were maximum under R:B (8:2), and significantly larger than control plants. The stomatal conductance or anthocyanin was maximum under B LED than those under FL, however the photosynthesis rate was greater under FL. RuBisCO activity was maximum under R:B (1:1) LEDs while the quantity of the UV absorbing substances was highest under R LED than under FL. The maximum amount of cardenolides were obtained from leaf tissue under R:B (2:8) LED than those under FL. The R:B LEDs light was suitable for Digitalis plant growth, development, micro- and macro-elements, as well as cardenolides accumulation in the plant factory system. The adaptation of the growth strategy developed in this study would be useful for the production of optimized secondary metabolites in Digitalis spp.
在本报告中，我们研究了不同光质对受控环境下紫花洋地黄的影响。为此，使用了红光（R）、蓝光（B）、荧光灯（FL，对照）以及红蓝组合 LED（R:B）。有趣的是，在 R:B（8:2）下，植物生长参数如叶片数、最长根、叶片宽度、气孔宽度、毛状体宽度、叶面积、叶片或根鲜重（FW）、干重（DW）以及毛状体长度最大，明显大于对照植株。与 FL 相比，B LED 下的气孔导度或花青素最大，但 FL 下的光合速率更大。R:B（1:1）LED 下的 RuBisCO 活性最大，而 R LED 下的紫外吸收物质数量高于 FL。与 FL 相比，R:B（2:8）LED 下叶片组织中提取的强心苷含量最高。R:B LED 光适合工厂化系统中紫花洋地黄的生长、发育、微量和大量元素以及强心苷的积累。本研究中开发的生长策略的适应性将有助于优化紫花洋地黄属植物中次生代谢物的生产。
