caa a22 4500 605480508 CHVBK 20210128100416.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s11099-015-0092-7 doi (NATIONALLICENCE)springer-10.1007/s11099-015-0092-7 Chloroplast ultrastructure, photosynthesis and accumulation of secondary metabolites in Glechoma longituba in response to irradiance [Elektronische Daten] [L. Zhang, Q. Guo, Q. Chang, Z. Zhu, L. Liu, Y. Chen] Glechoma longituba (Nakai) Kupr. is a perennial shade plant with pharmaceutical importance. The aim of this study was to investigate the effects of light intensity on the growth, photosynthesis, and accumulation of secondary metabolites in G. longituba grown under six different light environments. The high light intensity decreased the leaf size, specific leaf area, and aboveground dry mass, the number of grana per chloroplast, the number of lamella per granum, the thickness of the grana, the apparent quantum efficiency, the chlorophyll (Chl) content, the concentrations of ursolic and oleanolic acid. The high light increased the stomatal density, the stoma size, the number of chloroplast per a cell, the chloroplast size, the dark respiration rate, the light saturation point, the light compensation point, and the Chl a/b ratio. With the reduction in the light intensity, the light-saturated net photosynthetic rate, the aerial dry mass per plant, and the yields of ursolic and oleanolic acid decreased after an initial increase, peaking at 16 and 33% of sunlight levels. Overall, the 16 and 33% irradiance levels were the most efficient in improving the yields and qualities of the medicinal plant. The lower light demand and growth characteristics suggest that G. longituba is an extremely shade-tolerant plant and that appropriate light intensity management might be feasible to obtain higher yields of secondary metabolites in agricultural management. The Institute of Experimental Botany, 2015 gas exchange nationallicence light adaptation nationallicence stomatal index nationallicence thylakoid nationallicence triterpene acids nationallicence AQE : apparent quantum efficiency nationallicence Chl : chlorophyll nationallicence LCP : light compensation point nationallicence LSP : light saturation point nationallicence OA : oleanolic acid nationallicence P N : net photosynthetic rate nationallicence P Nmax : light-saturated net photosynthetic rate nationallicence R D : dark respiration rate nationallicence SLA : specific leaf area nationallicence UA : ursolic acid nationallicence Zhang L. Institute of Chinese Medicinal Materials, Nanjing Agricultural University, 210095, Nanjing, China aut Guo Q. Institute of Chinese Medicinal Materials, Nanjing Agricultural University, 210095, Nanjing, China aut Chang Q. College of Forestry, Henan University of Science and Technology, 471003, Luoyang, China aut Zhu Z. Institute of Chinese Medicinal Materials, Nanjing Agricultural University, 210095, Nanjing, China aut Liu L. Institute of Chinese Medicinal Materials, Nanjing Agricultural University, 210095, Nanjing, China aut Chen Y. Institute of Chinese Medicinal Materials, Nanjing Agricultural University, 210095, Nanjing, China aut Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/1(2015-03-01), 144-153 0300-3604 53:1<144 2015 53 11099 https://doi.org/10.1007/s11099-015-0092-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11099-015-0092-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang L. Institute of Chinese Medicinal Materials, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Guo Q. Institute of Chinese Medicinal Materials, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Chang Q. College of Forestry, Henan University of Science and Technology, 471003, Luoyang, China aut NATIONALLICENCE 700 1- Zhu Z. Institute of Chinese Medicinal Materials, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Liu L. Institute of Chinese Medicinal Materials, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Chen Y. Institute of Chinese Medicinal Materials, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 773 0- Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/1(2015-03-01), 144-153 0300-3604 53:1<144 2015 53 11099