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湖泊科学  2012 

低氧化还原电位对铜绿微囊藻(Microcystisaeruginosa)生长的抑制及恢复的影响

DOI: 10.18307/2012.0404

Keywords: 铜绿微囊藻,氧化还原电位,生长抑制,恢复,,SOD酶,叶绿素a

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Abstract:

在实验室光照黑暗交替培养下,用半胱氨酸下调黑暗起始时的氧化还原电位(ORP),研究低电位对铜绿微囊藻(MicrocystisaeruginosaFACHB469)生长的影响,并探索低电位胁迫消除后铜绿微囊藻生长的恢复潜力.结果表明,在-50~-100mV范围内水体ORP越低,其对铜绿微囊藻生长的抑制作用越强.低ORP可抑制铜绿微囊藻对磷的吸收,且这种抑制程度与电位变化无关.-50~-75mV的电位对铜绿微囊藻SOD酶活性有促进作用,而-90~-100mV电位明显抑制SOD酶活.当低ORP胁迫消除后,铜绿微囊藻能够恢复至最初的生长状态,同时伴随含磷量的提高和SOD酶活的恢复,-50~-75mV电位胁迫对藻消除胁迫后的生长更有促进作用.因此,低ORP对铜绿微囊藻的生长会产生不利影响,但是该影响是可逆的.

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