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OALib Journal期刊
ISSN: 2333-9721
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盐生杜氏藻对硝酸盐的转运特性
DOI: 10.3724/SP.J.1145.2010.00489, PP. 489-492
Keywords: 盐生杜氏藻,硝酸盐,硝酸盐转运蛋白,硝酸盐吸收率
Abstract:
盐生杜氏藻（dunaliellasalina）是已知最耐盐的真核光合生物，硝酸盐作为盐生杜氏藻氮源的主要来源，影响盐生杜氏藻的生长代谢，研究盐生杜氏藻对硝酸盐的转运吸收状况，可为生长于高盐、低盐环境中作物吸收氮的研究提供理论基础.以水杨酸法测定硝酸盐浓度，设计相关实验，结果发现盐生杜氏藻在低浓度的硝酸盐（0.2mmol/l）溶液中对硝酸盐有吸收，吸收效率随硝酸盐浓度的增大而提高；当盐浓度为2mol/l时其硝酸盐吸收效率最高，说明一定的盐浓度能诱导盐生杜氏藻对硝酸盐的吸收；经nh4+预处理过的盐生杜氏藻，在相同硝酸盐浓度下培养时其硝酸盐吸收效率比未经nh4+预处理的低.实验结果提示盐生杜氏藻存在高亲和性的硝酸盐转运蛋白.图6参17
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