不同光质对岩黄连生长发育、细胞结构及有效成分含量的影响OA北大核心CSTPCD

To study the effects of different light qualities on the growth,development,cellular structure,and accumulation of active components in Corydalis saxicola Bunting in a plant factory,the C.saxicola seedlings were used as the experimental material and 8 treatment were designed using white,red(R),and blue(B)LED light sources.White light(control),Blue light(E1),R∶B ratio of 2∶1(E2),R∶B ratio of 4∶1(E3),R∶B ratio of 6∶1(E4),R:B ratio of 8∶1(E5),R∶B ratio of 10:1(E6),Red light(E7).The growth indicators of plants and the content of dehydrocavidine under different treatments were measured and the anatomical structure of the leaves were observed.The results showed that:The increase in red light ratio had a significant impact on plant growth and component content.While E3 treatment significant increased the number of petioles,the diameter of the main root,and the aboveground dry weight;group E4 can optimize the root-to-shoot ratio;while pure red light promoted the growth of plant height and main root length.The content of chlorophyll a was higher in E5 treatment with high proportion of blue light and red light;group E2 had an advantage in the content of chlorophyll b,total chlorophyll,and carotenoids.At group E4,the content of Corydalis alkaloids in the root exceeded that in the aboveground part;the total alkaloid content in groups E3,E5,and E7 increased.Observations of tissue structure showed that an increase in the proportion of red light led to differences in plant tissue structure:group E2 had a significant palisade tissue;groups E3 and E7 had orderly differentiated palisade cells;groups E4 and E5 had disordered cell arrangement and loose mesophyll;group E6 had shrunken epidermal cells,loose and thickened spongy tissue,and unclear palisade tissue differentiation.In summary,light quality regulation has a significant regulation on the growth and development and secondary metabolites accumulation of C.saxicola.