| Mn2+ 对四尾栅藻生长及Ca2+、Mg2+ 吸收的影响 |
| Effects of Mn２＋ on Growth of Scenedesmus quadricauda and Uptake of Ca２＋ and Mg２＋ |
| 投稿时间：2009-07-21 修订日期：2009-08-21 |
| DOI： |
| 中文关键词:四尾栅藻 Ｍｎ２＋ Ｃａ２＋ Ｍｇ２＋ 生物量 叶绿素ａ |
| 英文关键词:Scenedesmus quadricauda Ｍｎ２＋ Ｃａ２＋ Ｍｇ２＋ Biomass Chlorophyll-a |
| 基金项目:江苏省环境材料与环境工程重点实验室项目资助 |
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| 中文摘要: |
| 通过实验室模拟培养的方法,采用6个不同Mn2+浓度(0、10、100、1000、10000、30000nmol/L)的培养处理,对四尾栅藻(Scenedesmus quadricauda)的生物量、叶绿素a含量、培养基中Ca2+、Mg2+离子的含量分别进行了测定。结果表明,不同Mn2+浓度对各指标均有显著影响,其中对叶绿素a含量的影响达极显著(P<0.01);低Mn2+浓度(0~1000nmol/L)促进四尾栅藻细胞生长和叶绿素a的合成,而高浓度Mn2+(30000nmol/L以上)抑制四尾栅藻细胞生长,导致生物量下降;叶绿素a含量显著降低(P<0.05);四尾栅藻细胞吸收的Ca2+、Mg2+与其生物量成正比。在所设置的浓度范围内,Mn2+并未表现出与Ca2+、Mg2+之间明显的拮抗作用。 |
| 英文摘要: |
| Mn is one of the essential trace elements for algae growth and functions in many physiological aspects in algae cell. However, the ammention to effects of Mn on the growth of Scenedesmus quadricauda and on other nutrient cation uptake were rarely given by us. In this experiment we observed the effect of Mn2+ concentration on the growth and Ca2+, Mg2+ uptake of Scenedesmus quadricauda in laboratory. Series of 250 mL flasks containing the prepared Scenedesmus quadricauda culture were incubated at 25℃ for 1 month under different Mn2+ concentrations(0，10，100，1 000，10 000，30 000 nmol/L).After that the biomass，chlorophyll a content，the concentration of Ca2+and Mg2+ in culture medium were determined. The results showed all the index were significantly influenced by Mn2+, among which the effect of chlorophyll a content was extremely significant. Lower Mn2+ concentrations in culture medium(0-1000 nmol/L) promoted the growth of Scenedesmus quadricauda and synthesis of chlorophyll a，and higher Mn2+ concentration would suppress its growth，resulting in a lower biomass and a lower chlorophyll a concentration in cells. With increase of biomass of Scenedesmus quadricauda more Ca2+ and Mg2+ in medium had been adsorbed by them. In range of Mn2+ concentration adopted in this experiment there was no antagonism between uptake of Mn2+ and Ca2+, Mg2+. |
| 刘静,赵海涛,盛海军,徐轶群,封克.2010.Mn2+ 对四尾栅藻生长及Ca2+、Mg2+ 吸收的影响[J].水生态学杂志,31(2):32-37. |
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