铜绿微囊藻和四尾栅藻光合利用碳酸氢盐探讨

Journal of Lake Sciences(2008)

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Abstract
为了探讨羹类光合过程对碳酸氧盐的利用,研究不同pH值下铜绿微囊藻和四尾栅藻的净光合速率,并着重研究这两株藻的碳酸氢盐摄取速率.结果表明,从弱酸性到弱碱性,四尾栅藻的净光合速率都比铜绿微囊藻高.由pH值超过pH转折点后的无机碳摄取速率计算得到的碳酸氢盐摄取速率对铜绿微囊藻和四尾栅藻分别为142.14和314.08μmo1DIC/(g·h,FW),故这两株藻都可利用碳酸氢盐作为碳源进行光合,且均为强碳酸氧盐利用者;但是,四尾栅藻对碳酸氲盐的利用能力强于铜绿微囊藻.另外,与四尾栅藻相比,铜绿微囊藻的碳酸氧盐摄取速率更易受抑制剂的抑制.
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Key words
Scenedesmus quadricauda,HCO_3- uptake rate,pH drift,net photosynthetic rate,Microcystis aeruginosa
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