| 碱度增加对蛋白核小球藻光合活性与胞外多糖的影响 |
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| 引用本文： | 康丽娟,潘晓洁,常锋毅,李敦海,沈银武,刘永定.碱度增加对蛋白核小球藻光合活性与胞外多糖的影响[J].湖泊科学,2008,20(2):251-256. |
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| 作者姓名： | 康丽娟 潘晓洁 常锋毅 李敦海 沈银武 刘永定 |
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| 作者单位： | 1. 中国科学院水生生物研究所,武汉,430072;中国科学院研究生院,北京,100049
2. 中国科学院水生生物研究所,武汉,430072 |
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| 基金项目： | 中国科学院知识创新工程项目
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国家重点基础研究发展计划(973计划) |
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| 摘 要： | 本文研究了不同重碳酸盐(HCO3)碱度2.3mmol/L(ALK2.3)和12.4mmoFL(ALK12.4)条件对蛋白核小球藻光合活性、色素组成、丙二醛(MDA)含量与胞外多糖的影响.实验结果表明,碱度增加对蛋白核小球藻光合活性呈促进一抑制一促进效应,ALK2.3对光合活性影响的强度.高于ALK12.4.碱度增加提高叶绿素b/叶绿素a(Chl.b/Chl.a)的值,降低类胡萝卜素/叶绿素(Caro/TChl)的值,并且ALKl24条件下对藻细胞的作用程度强于ALK2.3.此外碱度增加刺激蛋白核小球藻胞外多糖分泌,ALK2.3在培养初期提高MDA含量,ALK12.4下细胞MDA含量显著降低.说明碱度增加会促进蛋白核小球藻光合活性,促进光合产物的积累与分泌.暗示胞外多糖的分泌可能是细胞适应高碱度的一种自我保护机制.
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| 关 键 词： | 碱度 光合活性 光合色素 胞外多糖 丙二醛 |
| 收稿时间： | 2007-03-28 |
| 修稿时间： | 2007-05-22 |
Effects of alkalinity variations on photosynthetic activity and exopotysaccharides of Chlorella pyrenoidosa |
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| KANG Lijuan,PAN Xiaojie,CHANG Fengyi,LI Dunhai,SHEN Yinwu and LIU Yongding.Effects of alkalinity variations on photosynthetic activity and exopotysaccharides of Chlorella pyrenoidosa[J].Journal of Lake Science,2008,20(2):251-256. |
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| Authors: | KANG Lijuan PAN Xiaojie CHANG Fengyi LI Dunhai SHEN Yinwu and LIU Yongding |
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| Institution: | KANG Lijuan~,PAN Xiaojie~ |
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| Abstract: | Effects of bicarbonate(HCO_3~-)alkalinity on the photosynthetic performance of Chlorella pyrenoidosa was investigated in present study.Photosynthetic activity,pigments,MDA and ultrastructure of Chlorella pyrenoidosa were measured for when they were cultured at two different alkalinities including 2.3mmol/L(ALK2.3)and 12.4mmol/L(ALK12.4),respectivily.At ALK2.3, photosynthetic activity was stimulated at the prophase of culture and then inhibited at the anaphase.At ALK12.4,it represented the same phenomenon,bu... |
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| Keywords: | Alkalinity photosynthesis pigments exopolysaccharides malondialdehyde |
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