| 亚铁离子对赤潮异弯藻种群消长和部分生化特性的影响 |
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| 引用本文： | 周成旭,严小军,陈安敏.亚铁离子对赤潮异弯藻种群消长和部分生化特性的影响[J].海洋科学,2008,32(1):10-13. |
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| 作者姓名： | 周成旭 严小军 陈安敏 |
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| 作者单位： | 中国海洋大学,医药学院,教育部海洋药物重点实验室,山东,青岛,266003 |
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| 基金项目： | 国家自然科学基金
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教育部高校科技创新工程重大项目
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浙江省自然科学基金 |
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| 摘 要： | 研究了赤潮异弯藻(Heterosigma akashiwo)在不同浓度的Fe(NH4)2(SO4)2.6H2O(Fe1)和FeSO4.7H2O(Fe2)(浓度分别为:高铁150 nmol/L、低铁50 nmol/L,缺铁0 nmol/L Fe0)中的种群消长过程、单位细胞总多糖特征、光合色素chla、chlc变化以及NO3--N的吸收情况。结果表明,Fe2 浓度影响到赤潮异弯藻的消亡:缺铁组比高铁组种群消亡慢。在平台期和衰亡期时,Fe1各组单位细胞总多糖含量均明显高于Fe2各组。从平台期到衰亡期,各组单位细胞多糖含量明显增加,Fe2各组增量最大,Fe1各组多糖倍增与Fe0相似。亚铁离子浓度的进一步增加有利于单位细胞色素chla和chlc的积累。亚铁离子的不同化合物状态影响到多糖和光合色素的累积,但不影响种群生长率和对NO3--N的吸收。
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| 关 键 词： | 亚铁离子 赤潮异弯藻(Heterosigma akashiwo) 种群消长 多糖 光合色素 |
| 文章编号： | 1000-3096（2008）01-0010-04 |
| 收稿时间： | 2006-04-20 |
| 修稿时间： | 2006-10-10 |
Population dynamics and some biochemical changes in Heterosigma akashiwo affected by ferrous ion |
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| HU Bin,HAN Feng,LIN Yu-zi,GONG Qian-hong,YU Wen-gong.Population dynamics and some biochemical changes in Heterosigma akashiwo affected by ferrous ion[J].Marine Sciences,2008,32(1):10-13. |
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| Authors: | HU Bin HAN Feng LIN Yu-zi GONG Qian-hong YU Wen-gong |
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| Abstract: | The effects of ferrous ion on ichthyotoxic red tide organism Heterosigma akashiwo were studied.Two ferrous ion forms,Fe(NH4)2(SO4)(Fe1) and FeSO4(Fe2),were added to the culture under three different concentrations(high group,150 nmol/L;low group,50 nmol/L,naught group,0 nmol/L),changes of population,polysaccharide,chlorophyll a and c and nitrate level in culture medium were investigated.The results indicated that ferrous concentration affects the population crash,a ferrous deficient group(Fe0) can maintain a longer life and a higher density than the higher iron groups during the population crash.The cellular polysaccharide content in Fe1 group is significantly higher than that in Fe2 group both at stationary phase and crash phase.From stationary phase to crash phase,the polysaccharide content in each group increased,the highest increase appeared in Fe2.Increase of ferrous ion is helpful to the accumulation of chlorophylls.The different formations of ferrous ion affect the accumulations of polysaccharide and chlorophylls but have no obvious effects on the population growth rate and nitrate level. |
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| Keywords: | Ferrous ion Heterosigma akashiwo population dynamics polysaccharides chlorophylls |
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