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    题名 作者 年代 出处 被引量
1高等植物中氨同化酶及其同工酶研究显示文摘介绍了高等植物中谷氨酰胺合成酶及其同工酶的分布及亚细胞定位、生理功能及其基因的研究进展 ;同时还简要介绍了谷氨酸脱氢酶。李常健 林清华 张楚富 2000零陵师范高等专科学校学报2000,21,3:16
2灌溉模式和氮肥用量对水稻分蘖期生长特征的影响显示文摘【目的】研究灌溉模式和氮肥用量对水稻分蘖期主要生长指标性状的影响,寻找节水减肥、水肥高效的稻田水肥管理模式。【方法】以适宜豫北沿黄稻区种植的早熟晚粳稻'五粳04136'和杂交早稻'Y两优3218'为供试材料,采用田间试验方法,试验主处理设置100、200、300 kg/hm23个氮肥用量(N100、N200、N300),副处理设置干湿交替灌溉(AWD)、浅水淹灌即长期淹水(SW)、湿润灌溉(HI)3种灌溉模式,于水稻最大分蘖期选取每小区长势一致的植株及相应土壤样品测定水稻地上部和土壤养分等相关指标。【结果】水稻分蘖期生物量、分蘖数、株高、耕层土壤铵态氮量、硝态氮量、根系GS活性及植株叶、叶鞘、根系含氮量整体受氮肥用量的影响均大于受灌溉方式的影响;分蘖期水稻根系伤流液强度受氮肥用量和灌溉模式的影响均较明显;而水稻分蘖期叶龄受氮肥用量和灌溉模式的影响都较小,尚未表现出显著差异。【结论】灌溉模式和氮肥用量对水稻分蘖期各生长指标的影响程度不一,二者影响各指标的内在机制有待进一步研究。田广丽 李东伟 甄博 李会贞 周新国 2018灌溉排水学报2018,37,12:11
3Effect of Exogenous Ammonium on GlutamineSynthetase, Glutamate Synthase, and Glutamate Dehydrogenase in the Root of Rice Seedling显示文摘Root biomass of rice seedlings was increased at lower concentration or exogenous NHt, but it was decreased at higher concentration of exogenous NHt. The level or free NHt in the roots was accumulated gradually with the increase or NHt concentration in the nutrient solution. The content of the soluhle proteins was essentially constant at higher NHt. The activities of glutamine synthetase(GS), NADH-dependent gluta-mate synthase (NADH-GOGAT), and NADH-dependent glutamate dekydrogenase (NADH-GDH) were risen with exogenous NHt concentration at the lower NHt concentratlon range. But the activities of GS and NADH-GOGAT were decIined, and the level of NADH-GDH activity was kept constant under bigher NH concentration. The GS/GDH ratio suggested that NH was assimilated by GS-GoGAT cycle under lower NH concentration,but NADH-GDH was more important for NHt assimilation aud detoxifying NH to the tissue cells at the higher NH level. According to the growth and the activity changes of these ammonium-assimilat-ing enzymes of rice seedling roots, 10.0 μg/mL NH-N in nutrient solution was more suitable to the ricegrowth.1999Wuhan University Journal of Natural Sciences1999,4,3:1
4Effect of Salt Stress on Nitrogen Assimilation of Functional Leaves and Root System of Rice in Cold Region显示文摘The aims were to investigate the effect of salt stress on key enzyme activity of nitrogen metabolism and the concentration of nitrate nitrogen and ammonium nitrogen response to salt stress.Two rice cultivars,Mudanjiang 30(sensitive cultivar)and Longdao 5(salt-tolerant cultivar),were treated with different salt concentrations(CK 0%,S10.075%,S20.15%,S30.225%and S40.3%).The results showed that the activities of nitrate reductase(NR),glutamine synthase(GS),glutamate synthase(GOGAT)and glutamate dehydrogenase(GDH)in the functional leaves and roots of rice in cold region presented a single peak curve change and the peak occurred in the heading stage;compared with those of the CK,the activities of NR,GS and GOGAT of rice in cold region decreased,but the activity of GDH increased in the heading stage under salt stress.The variation for key enzyme activity of nitrogen metabolism was the highest under S4 treatment.The activities of NR,GS and GOGAT in the functional leaves significantly decreased compared with those in roots;the concentrations of nitrate nitrogen and ammonium nitrogen in the functional leaves and roots of rice in cold region presented a single peak curve change and the peak occurred in the heading stage;compared with that of the CK,the concentration of nitrate nitrogen decreased in leaves and roots,the concentration of ammonium nitrogen decreased and the concentration of ammonium nitrogen in roots increased under salt stress.The variations for the activities of NR,GS and GOGAT in the functional leaves and roots of Longdao 5 were less than those of Mudanjiang 30 under the same concentration of salt stress.Gu Jiao-jiao Zhao Hong-wei Jia Yan Hu Bo-wen Wang Zhuo-qian Qu Zhao-jun Yu Feng-li 2020Journal of Northeast Agricultural University(English Edition)2020,27,2:0
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