首页 | 本学科首页   官方微博 | 高级检索  
     检索      

热带海草海菖蒲不同组织中硝酸还原酶活力的研究
引用本文:王小兵,白洋,黄勃.热带海草海菖蒲不同组织中硝酸还原酶活力的研究[J].热带生物学报,2010(4):327-330.
作者姓名:王小兵  白洋  黄勃
作者单位:[1]海南大学热带资源教育部重点实验室,海南海口570228 [2]海南大学材料与化工学院,海南海口570228 [3]海南大学海洋学院,海南海口570228
基金项目:海南省科技重点项目(080137)
摘    要:利用活体法研究了海南陵水新村湾热带海草海菖蒲不同组织中硝酸还原酶活力以及酶促反应条件因子pH、温度和KNO3浓度对酶活力的影响;pH设3个水平(7,8,9),温度(20~40℃)和KNO3(50~250mmol·L-1)浓度各5个水平。研究表明:酶促反应温度和KNO3浓度对酶活力有显著影响,而pH对酶活力没有影响;海菖蒲的最佳酶促反应条件为:100mmol·L-1KNO3,0.5mmol·L-1Na-EDTA、磷酸缓冲液(pH=8.0)、10mmol·L-1葡萄糖和w=0.5%的正丙醇;温度为30℃。在最佳酶促反应条件下,海菖蒲叶、根和茎的鲜质量组织中硝酸还原酶活力大小分别为:1.01,0.08,0.001μmol.g-1.h-1。

关 键 词:海草  海菖蒲  硝酸还原酶  活体法

Studies on Nitrate Reductase Activity in Different Tissue of Enhalus acoroides
WANG Xiao-bing,BAI Yang,HUANG Bo.Studies on Nitrate Reductase Activity in Different Tissue of Enhalus acoroides[J].Journal of Tropical Biology,2010(4):327-330.
Authors:WANG Xiao-bing  BAI Yang  HUANG Bo
Institution:1.Tropical Bioresources of Education Department Laboratory,Hainan University,Haikou 570228,China;2. College of Material Science and Chemical Engineering,Hainan University,Haikou 570228,China;3. Ocean College,Hainan University,Haikou,570228,China)
Abstract:An in vivo method was used to determine the Nitrate reductase (NR) activity in the different tissue from Enhalus acoroides in the Xincun Bay of Hainan Island. The effects of pH of the assay media(7,8 and 9),temperature (5 ℃ steps,from 20 to 40 ℃) and KNO3 concentrations(50 mmol·L-1 steps,from 50 to 250 mmol·L-1)on leaf NR activity were tested. The results indicated that both assay temperature and KNO3 concentration had a significant effect on NR activity,but pH not; the optimal assay medium contained 100 mmol·L-1 KNO3,0.5 mmol·L-1 Na-EDTA,phosphate buffer (pH=8.0),10 mmol·L-1 glucose,0.5%(v:v) 1-propanol,and at 30 ℃. NR activity in leaves was 1.01 μmol·g-1·h-1,0.08 μmol·g-1·h-1 in roots and 0.001 μmol·g-1·h-1 in shoots under the optimal assay medium conditions.
Keywords:seagrass  Enhalus acoroides  nitrate reductase  in vivo method
本文献已被 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号