caa a22 4500 606208011 CHVBK 20210128101020.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s00425-015-2265-9 doi (NATIONALLICENCE)springer-10.1007/s00425-015-2265-9 Accumulation of silymarin in milk thistle seeds under drought stress [Elektronische Daten] [Reza Keshavarz Afshar, Mohammad Chaichi, Mahya Ansari Jovini, Emad Jahanzad, Masoud Hashemi] Main conclusion : According to the results obtained in this study, drought stress can enhance the accumulation of silymarin in milk thistle seeds. Moreover, under drought stress, the share of silybin increased which possess the greatest degree of biological activity among the silymarin components. Silymarin, an isomeric mixture of flavonolignans found in milk thistle (Silybum marianum (L.) Gaertn) seeds, has been used for its hepatoprotective effects for more than 2,000years. Biosynthesis and accumulation of active substances like silymarin in plant tissues highly interacts with the environmental conditions. Effects of moderate and severe drought stress (based on soil moisture depletion) on silymarin content and composition in milk thistle seeds were evaluated in a field study. Averaged across treatments, milk thistle seeds contained 19.3gkg−1 silymarin. Drought stress enhanced silymarin accumulation in milk thistle seeds. Plants grown under moderate and severe drought stress treatments contained 4 and 17% greater silymarin than those grown in well-watered condition, respectively. Greater content of sylimarin in stressed plants was attributed to more contents of silybin, isosilybin and silychristin, while silydianin content was lower under drought condition. According to the results obtained in this study, drought stress enhanced accumulation of silymarin in milk thistle seeds and improved its quality by increasing the share of silybin, which possess the greatest degree of biological activity among the silymarin components. Springer-Verlag Berlin Heidelberg, 2015 Flavonolignans nationallicence Medicinal plant nationallicence Silybin nationallicence Silybum marianum nationallicence Water stress nationallicence Keshavarz Afshar Reza Department of Agronomy and Plants Breeding, College of Agriculture and Natural Resources, University of Tehran, P. O. Box 4111, 31587-77871, Karaj, Iran aut Chaichi Mohammad Department of Agronomy and Plants Breeding, College of Agriculture and Natural Resources, University of Tehran, P. O. Box 4111, 31587-77871, Karaj, Iran aut Ansari Jovini Mahya Department of Agronomy and Plants Breeding, College of Agriculture and Natural Resources, University of Tehran, P. O. Box 4111, 31587-77871, Karaj, Iran aut Jahanzad Emad Stockbridge School of Agriculture, University of Massachusetts Amherst, 01003, Amherst, MA, USA aut Hashemi Masoud Stockbridge School of Agriculture, University of Massachusetts Amherst, 01003, Amherst, MA, USA aut Planta Springer Berlin Heidelberg 242/3(2015-09-01), 539-543 0032-0935 242:3<539 2015 242 425 https://doi.org/10.1007/s00425-015-2265-9 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/s00425-015-2265-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Keshavarz Afshar Reza Department of Agronomy and Plants Breeding, College of Agriculture and Natural Resources, University of Tehran, P. O. Box 4111, 31587-77871, Karaj, Iran aut NATIONALLICENCE 700 1- Chaichi Mohammad Department of Agronomy and Plants Breeding, College of Agriculture and Natural Resources, University of Tehran, P. O. Box 4111, 31587-77871, Karaj, Iran aut NATIONALLICENCE 700 1- Ansari Jovini Mahya Department of Agronomy and Plants Breeding, College of Agriculture and Natural Resources, University of Tehran, P. O. Box 4111, 31587-77871, Karaj, Iran aut NATIONALLICENCE 700 1- Jahanzad Emad Stockbridge School of Agriculture, University of Massachusetts Amherst, 01003, Amherst, MA, USA aut NATIONALLICENCE 700 1- Hashemi Masoud Stockbridge School of Agriculture, University of Massachusetts Amherst, 01003, Amherst, MA, USA aut NATIONALLICENCE 773 0- Planta Springer Berlin Heidelberg 242/3(2015-09-01), 539-543 0032-0935 242:3<539 2015 242 425