On the basis of spectroscopic evidence (MS, ~1HNMR, ^(13)CNMR, CD, ~1H-~1H and ~1H-^(13)C cosy NMR) and chemical synthesis, the structure of isodopharicin E (1), isolated from the dry leaves and tender branches of Iso...On the basis of spectroscopic evidence (MS, ~1HNMR, ^(13)CNMR, CD, ~1H-~1H and ~1H-^(13)C cosy NMR) and chemical synthesis, the structure of isodopharicin E (1), isolated from the dry leaves and tender branches of Isodon pharicus (Prain) Murata was elucidated as 3R, 3'R, 13S, 13'S-tetrahydroxy-11S, 11'S-diacetoxy(16S-O-15')-bisentkaur-15'-en-15-one.展开更多
以淮山（Dioscorea fordii Prain et Burkill）茎段为材料，以MS为基本培养基，在（25±1）℃、光照强度24～30umol/m^2·s^-1、光照时间10h／d条件下对淮山的组织培养与快速繁殖技术进行了研究．结果表明，组合MS＋NAA0.03mg/L...以淮山（Dioscorea fordii Prain et Burkill）茎段为材料，以MS为基本培养基，在（25±1）℃、光照强度24～30umol/m^2·s^-1、光照时间10h／d条件下对淮山的组织培养与快速繁殖技术进行了研究．结果表明，组合MS＋NAA0.03mg/L＋KT3．00mg／L＋Ad5.00mg/L＋PVP100mg/L对芽的诱导最好，平均芽数达3.5445个，出芽率为94.45％；组合MS＋NAA0.01mg/L＋KT3.00mg/L＋Ad7.50mg/L＋PVP300mg/L对多芽体的增殖最好，平均增重2.9686倍；组合MS＋IBA0.20mg/L＋PVP300mg/L对生根最好，平均根数达15．5452条．展开更多
文摘On the basis of spectroscopic evidence (MS, ~1HNMR, ^(13)CNMR, CD, ~1H-~1H and ~1H-^(13)C cosy NMR) and chemical synthesis, the structure of isodopharicin E (1), isolated from the dry leaves and tender branches of Isodon pharicus (Prain) Murata was elucidated as 3R, 3'R, 13S, 13'S-tetrahydroxy-11S, 11'S-diacetoxy(16S-O-15')-bisentkaur-15'-en-15-one.
文摘以淮山（Dioscorea fordii Prain et Burkill）茎段为材料，以MS为基本培养基，在（25±1）℃、光照强度24～30umol/m^2·s^-1、光照时间10h／d条件下对淮山的组织培养与快速繁殖技术进行了研究．结果表明，组合MS＋NAA0.03mg/L＋KT3．00mg／L＋Ad5.00mg/L＋PVP100mg/L对芽的诱导最好，平均芽数达3.5445个，出芽率为94.45％；组合MS＋NAA0.01mg/L＋KT3.00mg/L＋Ad7.50mg/L＋PVP300mg/L对多芽体的增殖最好，平均增重2.9686倍；组合MS＋IBA0.20mg/L＋PVP300mg/L对生根最好，平均根数达15．5452条．
文摘马肠薯蓣（Dioscorea simulans Prain et Burkill）隶属于薯蓣科（Dioscoreaceae）薯蓣属（Dioscorea Linn.）根状茎组（Sect.Stenophora Uline）^（[1]）278。Prain等^（[2]）根据1928年秦仁昌采自广西罗城县大林山的标本（秦仁昌5319,5335）命名马肠薯蓣,并建立Sect.Illigerestrum Prain et Burkill^（[3]）,将马肠薯蓣归入该组。该组地上茎几乎不分枝,左旋;叶3裂,无毛;雄花簇生成小伞状或总状,花被片呈轮状排列;花药6枚,3大、3小;雌花花被片呈轮状排列,总状花序。
