石斛菌根化组培苗对N素的吸收利用  

Absorption of N-element in Dendrobium Plants Cultivated from Tissues and Mycorrhized

作　　者：陈连庆[1] 王小明[1] 裴致达[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所,富阳311400

出　　处：《林业科学》2007年第A01期48-52,共5页Scientia Silvae Sinicae

基　　金：国家自然科学基金资助项目(30170767)

摘　　要：石斛组培苗吸收利用N素营养的研究结果表明:不同N源对菌根化石斛组培苗生长(苗高、茎粗和生物量)的促进效应,以N源酒石酸铵为最好。酒石酸铵N源对石斛菌根真菌F9903菌株菌丝体增殖量也为最大值,所以酒石酸铵堪称两者增殖生长的最佳N源。同时,显示它们之间存在着密切的互动关系。浓度不同的酒石酸铵影响着菌根化石斛苗的生长和N、P、C元素的吸收与积累。方差分析结果表明,2.72mol.L-1的酒石酸铵是培育菌根化石斛苗的最适宜浓度。The resuhs of the study on the absorption of N nutrition in the plants of Dendrobium cultured from tissues show that （ NH）2 C4 H4 O6 as N source is the best for promoting the growth （ height, diameter of stem and biomass） of the plants which have mycorrhizae. Also, （NH）2C4H4O6 can promote growth of mycelium of F9903 which is a strain of mycorrhiza of Dendrobium. So, （NH）2C4H4O6 is a best N source for the propagations of both the plants and the mycorrhiza myceliaum. There is a strong interaction between the plants and their mycorrhizae. Different concentrations of （NH）2C4H4O6 can effect the growth of Dendrobium plants and absorptions of the mycorrhizae to N, P and C. Through a variance analysis, it has shown that the 2.72 mol·L^-1 of （NH）2 C4H4O6 is the most suitable concentration for culturing plants of Dendrobium.

关 键 词：石斛 菌根化 N营养 

分 类 号：S723.7[农业科学—林木遗传育种]