The Study On Slicic Of Biomineralization In Dendrocalamus Farinosus

Biomineralization is part of the life process of living bamboo wall.It is a dynamic process of a multi-level complex system.In order to further reveal the natural attribute of the bamboo,and development and utilization of new bamboo materials based on the biomineralization theory and bionic principles,To provide clear theory basis for the processing of bamboo,to promoting utilization rate of the entire bamboo.Based on the annual of bamboo dendrocalamus farinsus as the research object,By the studying of silicon deposition and bamboo wood in the growth cycle of change of dendrocalamus farinsus,to analyze the silicon in the growth of biological minerals and morphogenesis mechanism of bamboo.Acrossing the annual lignification process of dendrocalamus farinsus,found all the organization are lignification before the unfinished high growth.And the high growth gradually strengthen and accumulation in the process of complete.Until after one year,Bamboo stem completed lignification basically,except The top remains a small amount of accumulation.During the period of bamboo shoots（33 cm）siliceous can not seen cell and cuticular layer lignification,but found their in the 1th of young bamboo（146 cm）at the same time.But at this moment,the number of internode that have siliceous cells more than lignification.Explain siliceous cell development is early more than lignin deposition.Both belong to the bamboo growth and development process.As the bamboo grows,silicon deposition in siliceous cells,the stem of bamboo also gradually lignification.By the SEM to observed,Silicon in the form of SiO₂ assembled into small particles form deposits i Siliceous cell development is along with the high growth of bamboo,from bamboo shoot to mature bamboo,from base upward to top of bamboo,siliceous cell gradually differentiate into siliceous.Across the microscope observation,siliceous cell present different shape in three different sections.on the transverse section for the saddle,on the longitudinal section of the triangle,on epidermal section of irregular oval,occasional roundness.Bamboo there are not siliceous cells at the shoots period（33cm）,after 14 days,the height of bamboo reached to 146cm,the 1th to 10th inter node of bamboo have the siliceous cells.after43 days,When height of bamboo reached to 1400cm,the bamboo pole to the top of the skin from the base layer of cells is fully development,all the stem have siliceous cells,complete high growth at this time.The silicon deposition at whole process with siliceous cell development.Under microscope is bright with a certain thickness of sequins or black precipitate forms.Siliceous cells,gradually gathered filling siliceous cell in two ways.The first from is the skin surface gradually to accumulate until it is full of the whole cell;The second from is kind of small particles gathered large,gradually formed a globular particles larger particles accumulate gradually,finally is full of the whole cell.Through the SEM-EDAX found silicon deposition mainly in epidermis layer of the surface of the bamboo stem epidermis,epidermal cell walls of elongated cells and siliceous cell.Three parts of the silicon deposition in different parts of the silicon content,the stoma of bamboo surface was 50.25%,the surface groove was7.90%,siliceous cells was 19.75%,elongated cell wall was 9.69%.According to the different parts O/Si atomic number contrast,Silicon in the form of SiO₂ deposition in the cell walls of elongated cells and siliceous cells,however,the surface of bamboo pole and porosity exists in the form of elemental silicon silicon elements.