农业环境科学学报2013，Vol.32Issue(6)：1128-1133,6.DOI:10.11654/jaes.2013.06.007
钇对铅胁迫下铜绿微囊藻抗氧化能力及藻毒素释放的影响
Effects of Yttrium on Physiological Characteristics and Microcystins Release of Microcystic aeruginosa with Pb2+ Stress
摘要
Abstract
In order to study the effects of different yttrium (Y3+) concentrations on the physiology and microcysin-LR (MC-LR),the M.aeruginosa FACHB912 was used in this work.The effects of different Y3+ concentration on M.aeruginosa under 1.00 mg· L-1 Pb2+ stress were investigated.Based on the growth curve of M.aeruginosa,the activity of antioxidant enzymes including SOD,POD,CAT,and the content of malondiadehyde(MDA) and microcystic toxins(MC-LR),results showed that obvious auxo-actions to the growth of M.aeruginosa,could be observed at relatively low concentrations of Y3+(O.10～0.50 mg· L-1) with Pb stress.Correspondingly,the activities of SOD,POD,and CAT in M.aeruginosa were enhanced,and the MDA presented decrease significantly.When the higher concentrations (1.00～10.00 mg· L-1) of Y3+was employed,more severely inhibition to the growth of M.aeruginosa could be observed.When the concentrations were in the range of 0.50～10.00 mg· L-1,the content of MDA and MC-LR increased immediately and the activity of antioxidant enzymes was reduced,which potentially lead to the decline of the ability of eliminating the reactive oxygen species.Moreover,the antioxidant defense system was destroyed,and the growth of M.aeruginosa was seriously inhibited correspondingly.The typical "Hormesis" effects can be observed as the yttrium was employed on M.aeruginosa.关键词
铜绿微囊藻/钇/铅胁迫/生理特性/微囊藻毒素-LRKey words
Microcystic aeruginosa/ yttrium / Pb2+ stress/ physiological characteristics/ microcysin-LR分类
农业科技引用本文复制引用
吴清莲,王应军,杜宇,郑颖..钇对铅胁迫下铜绿微囊藻抗氧化能力及藻毒素释放的影响[J].农业环境科学学报,2013,32(6):1128-1133,6.基金项目
大学生创新性实验(01409222) （01409222）
