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《》 2005-04
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Study on Variations of Nitrogen Nutrient Substances of Cistanche Deserticola and Haloxylon Ammodendron in Differdent Growth Stages

Zheng Guoqi~1,Song Yuxia~(2),Guo Shenghu~2,Ma Hongai~2,Niu Dongling~1 (1.School of Life Science,Ningxia University,Yinchuan 750021,China;2.Key Lab of Agricultural Bio-technology in Ningxia,Academic of Agricultural and Forestry of Ningxia,Yingchuan,750002,China)  
The activity of nitrate reductase and nitric nitrogen content were determined in different growth stages of parasitic plant,Cistanche deserticolea,and host plant,Haloxylon ammodendron.The results showed that the activity of nitrate reductase and nitric nitrogen content of the parasitic plant and the host plant were lower than that of the host plant without parasitic plant.Contrasting to the host plant,nitric nitrogen content of Cistanche deserticolea was higher than that of the host plant,but the activity of nitrate reductase was lower,which indicated that the other pathway of nitrogen metabolism might be existed except for the nitrate reductase in Cistanche deserticola.The nitrogen in the host plant was severely absorbed by Cistanche deserticola when they live together that the growth of host was inhibited,which resulted the reducing of the chlorophyll content and the branches growth rate of Haloxylon ammodendron.Therefore,It was concluded that the parasitic plant,Cistanche deserticola had negative effects on host plant,Haloxylon ammodendron.
【Fund】: 国家自然科学基金资助项目(3026008);; 国家科技攻关西部专项(2002BA901A32);; 宁夏自然科学基金资助项目(C123)
【CateGory Index】: Q946;Q948.9
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