【摘要】 采用根池与大田试验相结合的方法,研究了温麦6号的根系生长动态变化和内部解剖结构。结果表明:超高产小麦初生根在播后第7d开始一级分支,26d开始二级分支,三级分支根的发生在播种后80天左石,次生根的发生与初生根的二级分支形成同时进行,而次生根的一级分支与初生根的三级分支同时发生。越冬期间,次生根的二级分支相继形成,拔节以后,次生根的三级分支只在少数分支根上发生。从解剖结构看,初生根不同部位有较大差异,近分蘖节处,不具备根的完整结构,中柱鞘外组织脱落,导管与筛管壁厚而孔小,木质化程度高。次生根内皮层细胞增厚部分开始早、程度大、凯氏带明显,对水分和营养物质的吸收、运输有较好的选择与凋节能力。更多还原

【Abstract】 Study was carried out on the growth rhythm and the inner structure of wheatWenmai 6 in the field combined with the soil column culture. The results showed that primaryroots of the supper-high-yielding wheat began to form branches of the first order and the secondorder at 7th and 26th day after sowing, respectively. About 80 days after sowing, branches of-the third order of Primary roots appeared. Adventitious roots formed together with apparance ofthe second order of primary roots, and its first order branches were accompanied by the third order of primary root, The second order of adventitious roots formed in succession during winterand only a few branches of the third order occured after jointing. Great difference existed inanatomical structure at different positions of primary roots, which did not have complete structure near the tillering node with dropping of outside tissue of the middle pillar sheath thickoncdwall and small holo of vessel and siove tude. The endodrmis cell wall of adventitious roots thickened in large scale and started early with" a clear caspary’s band, which increased the abilities ofabsor ption and transport of water and nutrient substance.更多还原