[1]Frommer W B, Kwatr M, Hirner B,et al. Transporters for nitrogenous compounds in plants[J]. Plant Molecular Biology, 1994, 26:1651-1670. [2]Chrispeels M J, Crawford N M, Schorede J L. Proteins for transport of water and mineral nutrients across the membrane of plant cells [J]. Plant Cell, 1999, 11:661-675. [3]Cren M, Hirel B. Glulamine synthetase in higher plant: Regulation of gene and protein expression from the organ to the cell[J].?Plant Cell Physiology, 1999, 40:1187-1193. [4]Lea P J, Blackwell R D, Joy K W.Ammonia assimilation in higher plants[M]// Meng K, Pilbeam D J.Nitrogen Melabotism of Plants. Oxford University Press, Newyork, 1992: 153-186. [5]Refouvelet E, Daguin F. Polymorphic glutamate dehydrogenase inlilac vitro plants as revealed by combined preparative IEF and native PAGE: Effect of ammonium deprivation; darkness and atmospheric CO2 richment upon isomerization[J]. Physiologia Plantarum, 1999, 105:199-206. [6]Melo-oliveira R, Oliveira I C, Coruzzi G M. Arabidppsis?mutant analysis and gene regulation define anonredundant role for glutamate dehydrogenase in nitrogen assimilation[J]. Proceedings of the National Academy of Sciences USA, 1996, 93: 4718-4723. [7]Lea P J, Robinson S A, Stewart G R. The enzymology and metabolism of glutamine, glutamate, andasparagine[M]// Miflin B J,Lea P J. The Biochemistry of Plants. NewYork: Academic, 1990:121-159. [8]Lea P J, Miflin B J. Alternative route for nitrogen in higher plants[J]. Nature, 1974, 251:614-616. [9]Qusji G O, Madu W C. Ammonium ion salvage by glutamate dehyrogenase during defence response in maize[J]. Phytochemistry, 1996, 42: 1491-1498. [10]刘丽君, 孙聪姝, 刘艳,等. 氮肥对大豆结瘤及叶片氮素积累的影响[J].东北农业大学学报, 2005, 36(2):133-137. (Liu L J, Sun C S, Liu Y, et al. Effects of nitrogen on nodule-forming and nitrogen concentration in soybean leaves[J]. Journal of Northeast Agricultural University, 2005, 36(2):133-137.) [11]孙太靖, 龚振平, 马春梅. 大豆植株氮素积累与转运动态的研究[J].东北农业大学学报,2004, 35(5):517-521. (Sun T J, Gong Z P, Ma C M. Study on the regulation of nitrogen accumulation and translocation in high-oil soybean[J]. Journal of Northeast Agricultural University, 2004, 35(5):517-521.) [12]代翠红,李杰,朱延明,等. 不同提取方法对四种重要作物提取效率的比较[J] . 东北农业大学学报, 2005,36(3):329-332.(Dai C H, Li J, Zhu Y M, et al. Comparison of the efficiency of different DNA extraction methods on 4 kinds of important crops[J ] . Journal of Northeast Agricultural University, 2005,36(3):329-332.) [13]萨姆布鲁克.分子克隆实验指南(第三版)[M]. 北京:科学出版社, 2002:1-10.(Joseph sambrook. The condensed protocols from molecular cloning: a laboratory manual[M]. Beijing: Sciences Press, 2002: 1-10.) [14]Suzuki A, Knaff D B. Glutamate synthase: structural, mechanistic and regulatory properties,and role in the amino acid metabolism[J]. Photosynthesis Research,2005,83: 191-217. [15]Melo P M, Lima L M, Santos I M, et al. Expression of the plastid-located glutamine synthetase of Medicago truncatula. Accumulation of the precursor in root nodules reveals an in vivo control at the level of protein import into plastids[J]. Plant Physiology, 2003,132(1):390-399.