Dynamic changes of bioactive substances at the whole basidioma growth stage of Ganoderma lingzhi cultivated on wood log
Active substances of Ganoderma lingzhi are the material basis for the different functions of G.lingzhi.During the growth process of G.lingzhi,the content of active substances dynamically changes with the growth of basidiomata,and affects the quality and efficacy of G.lingzhi.Wood log cultivation is one of the two main cultivation modes of G.lingzhi,and the basidioma have a long growth cycle and accumulation time of active substances.Studying the changes of active substances during the growth stage has a positive significance for the efficient utilization of G.lingzhi materials.Currently,related reports have mainly focused on polysaccharides and triterpenoids,with little attention concerning other bioactive components of G.lingzhi,and the growth cycle covered was not complete enough.Therefore,there was limited understanding of the complete dynamic changes of each substance.This study analyzed the dynamic changes of active substances in the samples collected at scheduled time during nine stages of basidioma growth within 120 days from primordium formation stage to the end of sporulation.The summary is as follows:the content of total polysaccharides and twelve triterpenoid compounds in G.lingzhi was the highest in the primordium formation stage,rapidly decreased with growth,and became stable in the later stage of sporulation;the content of ergosterol was the highest during the primordium formation stage,rapidly decreased with growth,and slightly increased during the sporulation period;the content of uridine,uracil,and water-soluble protein/polypeptide continuously declined with the growth of basidiomata until the lowest,while adenosine changed undulately with the peak appearing in 60 days when G.lingzhi sporulation began.The total antioxidant capacity was weak during the primordium stage,and strong during the later stage of basidioma growth.This study elucidated the dynamic changes in the content and activity of the main active substances at the entire growth stage of G.lingzhi basidiomata,and provided a theoretical basis for guiding the production and efficient development and utilization of G.lingzhi.
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