缺氮和缺铁对平邑甜茶幼苗根系构型的影响  

Effect of Nitrogen-deficient and Iron-deficient on Root Architecture of Young Seedlings of Malus hupehensis (Pamp) Rehd.

作　　者：乔海涛[1] 杨洪强[1] 申为宝[1] 姜倩倩[1] 由淑贞[1] 张龙[1] 冉昆[1] 张鑫荣[1] 

机构地区：[1]山东农业大学园艺科学与工程学院,作物生物学国家重点实验室,山东泰安271018

出　　处：《园艺学报》2009年第3期321-326,共6页Acta Horticulturae Sinica

基　　金：国家自然科学基金项目(30571285;30671452);高校博士点科研基金项目(20050434009)

摘　　要：研究水培条件下缺氮、缺铁对平邑甜茶幼苗根系总长度、表面积、体积、根尖数、分枝角度、分形维数等根系构型参数的影响。结果表明:缺氮或缺铁处理后,幼苗细根比例增大,根系直径变小;一级侧根与主根的夹角整体上增大,大夹角植株数量普遍增多,根系趋向于水平分布;根系分形维数降低。其中缺氮使幼苗根系总长度、根系总表面积、根系总体积以及二级侧根数显著增加,但根系活力显著下降;缺铁使根尖数和主根的长度显著增加,根系活力和根系总表面积均下降;缺铁比缺氮时根系分形维数下降更多。The parameters of root architecture,total root length,surface area,volume,tips,branching angle and fractal dimension etc,were analyzed in young seedlings of Malus hupehensis（Pamp）Rehd.under nitrogen-deficient or iron-deficient in a solution culture system.The results showed that the proportion of fine root increased significantly,the root diameter and the fractal dimension decreased significantly,the angle between main root and first lateral root enlarged,and root tends to horizontal distribution under nitrogen-deficient or iron-deficient condition.Under nitrogen-deficient condition,the total length,surface area and volume of root and the number of second lateral roots increased significantly.Under iron-deficient condition,the number of root tip and the length of main root increased significantly,the activity and the number of root decreased significantly.The root fractal dimension in iron-deficient condition was less than that in nitrogen-deficient.

关 键 词：平邑甜茶 根系构型 分枝角度 分形维数 

分 类 号：S661[农业科学—果树学]