| summer variation in the concentration of steroidal sapogenins in and the degree of fungal infection on narthecium ossifragum plants from møre og romsdal county, norway. | thirty-nine leaf samples of narthecium ossifragum collected from eight sites in møre og romsdal county, norway, during june-september 1997 and 41 leaf samples collected at five sites in the same county during june-august 1998 were analysed for the concentrations of steroidal sapogenins using gc-ms. the 1998 samples were also examined for fungal elements (conidia and hyphae) after incubation in a moist chamber for 10-14 days. the highest 1997 and 1998 leaf sapogenin concentrations (4881 and 7115 ... | 2004 | 15074768 |