The Effects Of Sapium Sebiferum Seeds On Growth Of Hypha And Fruit Body Quality Of Edible Fungi

Sapium sebiferum (Chinese Tallow Tree) is a very important woody oil plant in China. It is riched in lipids in their seeds, which also content phorbolestors, a suspicious carcinogen. The seeds of Sapium sebiferum is a potential nutrient additive for the edible fungi production, especially in the practice of using farm crop residues to take the place of wood in the man made cultivation medium, which is considered to be undernourishement for quality mushroom production. Therefor, the quality and some relative food safety issue of the mushroom produced from the medium content with seed powder of Sapium sebiferum was firstly studied in present investigation.In this paper, experimental research is conducted on the effect of fatty acids on the growth of mycelium of two edible fungi, shiitake and oyster mushroom with the plate culture method. The research shows that saturated fatty acid could shorten the time needed for germination, while unsaturated fatty acid could promote branches of the mycelium of edible fungi; The dispersion method for fatty acid had significant effects on mycelial growth rate, the mycelium of oyster mushroom growed better in the medium of mixed fatty acids by saponification, while the mycelium growth of shiitake showed little difference in two dispersion method; The mycelial branches promotion ability of the fatty acid decreased in the order of polyunsaturated fatty acids (PUFA)>monounsaturated fatty acids(MUFA)>saturated fatty acid (SFA).The liposoluble constituents of the fruitbody of edible fungi were analyzed by GC-MS, TLC and LC-MS. It finds that the content of crude fatty in shiitake and oyster mushroom produced from the medium content with seed of Sapium sebiferum, increase by 25.9% and 66.8% respectively, in which the content of unsaturated fatty acid of the fruitbody of shiitake and oyster mushroom increased by 3.32% and 9.35% respectively. The phorbolestors toxin of kernel oil of Sapium sebiferum was not detected in fruitbody of both two mushroom, so it was suggested that the toxic substance of Sapium sebiferum was not transferred to the mushroom.Furthermore, the seeds powder of Sapium sebiferum was applied to the mushroom cultivation by weed-based cultivation media, and the result showed that the yield of both two mushroom increased. In the field test, the hypha growth rate increase by 0.09cm/d and 0.04cm/d when the seeds powder of Sapium sebiferum, or it's oil cake was added into the manmade basswood respectively. Additionaly, the research results showed that the hindrance of rice straw to the edible fungi is mainly due to stiff silicified cell distributed in the surface of rice straw. The structure was soften and silicon content of rice straw reduced from 6.613% to 0.926% after limewater treatment, which resulting in the significant faster mycelium growing of both two fungi. There is very little changed in the composition of terpene compounds in the rice straw after limewater treatment.In conclusion, the seeds of Sapium sebiferum could be used as nutritious additive for agricultural fiber based manmade basswood, which could either improve the quality or increase the yield of edible fungus products. It is worth to be further studied.