MA Yanmei, ZHOU Shuai, FENG Na, LIU Yanfang, WANG Jinyan, TANG Qingjiu, HAN Wei, ZHANG Jingsong
In order to find the optimal harvest time for Ganoderma lucidum cultivar ‘Hunong No.1’, ultra-high performance liquid chromatography-mass spectrometry (UPLC-MS/MS) and high performance exclusion chromatography-multi angle laser scattering (HPSEC-MALLS) were used to determine contents of triterpenoids and water soluble polysaccharides in fruiting bodies and bases at different growth stages. From the second to the seventh month after inoculation, every month was defined as a growth stage, and the different growth stages were designated as P1 to P6, respectively. Based on the yields of fruiting bodies and bases, the yields of triterpenoids and water soluble polysaccharides at different growth stages were also calculated. The results showed that the contents of ganoderic acid C2 and ganoderic acid G in fruiting bodies were high at P1and P2; the contents of ganoderenic acid B, ganoderic acid D, ganoderic acid F, and ganoderic acid DM in fruiting bodies were the highest at P2; the contents of ganoderic acid B, ganoderic acid A, ganoderic acid S, ganoderic acid T and total triterpenoids in fruiting bodies were the highest at P1; the contents of ganoderic acid C2, ganoderic acid A, ganoderic acid D, ganoderic acid DM and ganoderenic acid B in bases were the highest at P1; the content of ganoderic acid G in bases was the highest at P5; the contents of ganoderic acid B and ganoderic acid S in bases were the highest at P6; the content of ganoderic acid F in bases was high at P1 and P6; the contents of ganoderic acid T and total triterpenoids were high at P5 and P6. For triterpenoid yield in fruiting bodies, ganoderic acid C2, ganoderic acid G, ganoderic acid B, ganoderic acid D, ganoderic acid F, ganoderic acid DM, ganoderenic acid B and total triterpenoids were the highest at P2; ganoderic acid A was the highest at P3; both ganoderic acid S and ganoderic acid T were the highest at P1. For triterpenoid yield in bases, ganoderic acid C2, ganoderic acid G, ganoderic acid B, ganoderic acid A, ganoderic acid D, ganoderic acid F, ganoderic acid DM, ganoderenic acid B were the highest at P1; both ganoderic acid S and ganoderic acid T were the highest at P2; total triterpenoid yield was high at P1 and P2. For both fruiting body and base, the content and yield of water soluble polysaacharides were the highest at P1. These results provided a scientific basis for timely harvest of G. lucidum ‘Hunong No.1’.