固定流沙先锋树种沙生柽柳无性繁殖生根机理研究

沙生柽柳（Tamarix.taklamakanensis M.T.Liu）是我国荒漠地区流动沙丘上最抗旱耐热的固定流沙先锋树种，为我国荒漠区特有物种，仅分布于我国新疆塔里木盆地塔克拉玛干沙漠及盆地东部的库姆塔格沙漠，分布区生境严酷，面临着濒危威胁。因此，实施沙生柽柳引种繁育对研究亚洲中部荒漠植物区系特点和本属的系统发育有重要的科学意义。项目以沙生柽柳无性繁育入手，对沙生柽柳插穗优选、激素及浓度组合及扦插条件控制，探索沙生柽柳插穗生根条件，提高扦插成活率，同时开展沙生柽柳外植体培养及培养条件优化，寻求组培快繁技术途径；通过对沙生柽柳无性繁殖生根过程解剖结构分析，判定其生根类型，探讨外源激素诱导沙生柽柳无性繁殖生根机制，分析内源物质变化对沙生柽柳无性繁殖生根的响应，揭示沙生柽柳扦插繁殖生根机理，为沙生柽柳无性繁殖提供论理论支撑；开展沙生柽柳扦插育苗试验，凝练沙生柽柳扦插繁殖技术规程指导育苗生产。

Tamarix.taklamakanensis M.T.Liu is, an endemic to China, a pioneer species found in the moving sand dunes in the desert of China, with the strong resistance to drought and hight temperature, and only distributed in Taklimakan and Kumutage Desert. Due to the ordeal ecological conditions, the species is in imminent danger. So it is very important scientific significance for understanding the characteristics of flora in central Asia and Tamarix phylogeny to carry out the introduction and propagation. The purpose of the research is to explore the optimum condition of rooting by cuttage tender stem and improving survival rate of cuttage by selecting scion, combination with all kinds of hormones and requirements of cuttage to rooting, to obtain tissue culture technology by choosing the explant and culture condition and to confirm the rooting types in botany by anantomical structure analysis of rooting course, to obtanin the rooting mechanism of vegetation propagation by exogenous horone induction and analyze the response of vegetation progation rooting to endogenesis horome and finally obtained the rooting mechanism of cuttings and provided with some theorietical basis Tamarix.taklamakanensis M.T.Liu of vegetation propagation.