|本期目录/Table of Contents|

[1]李晓梅,郭体环,张来军,等.海水酸化条件下铅胁迫对近江牡蛎过氧化氢酶活性的影响[J].江苏农业科学,2017,45(07):165-168.
 Li Xiaomei,et al.Effect of lead stress on catalase activity of Crassostrea rivularis under ocean acidification[J].Jiangsu Agricultural Sciences,2017,45(07):165-168.
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海水酸化条件下铅胁迫对近江牡蛎过氧化氢酶活性的影响(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第45卷
期数:
2017年07期
页码:
165-168
栏目:
畜牧兽医与水产蚕桑
出版日期:
2017-04-20

文章信息/Info

Title:
Effect of lead stress on catalase activity of Crassostrea rivularis under ocean acidification
作者:
李晓梅 郭体环 张来军 李由明
海南热带海洋学院热带生物与农学院,海南三亚 572022
Author(s):
Li Xiaomeiet al
关键词:
海洋酸化CAT近江牡蛎健康养殖过氧化氢酶活性
Keywords:
-
分类号:
S917.4;S968.31+6.9
DOI:
-
文献标志码:
A
摘要:
为了研究在未来海洋酸化背景下重金属对贝类免疫的影响,在实验室条件下,设置0.05、0.50、5.00 mg/L 3种硝酸铅浓度,以0.00 mg/L作为对照,比较正常海水(pH值8.0)、酸化海水(pH值7.6)背景下铅胁迫对近江牡蛎鳃组织过氧化氢酶(CAT)活性的影响。结果表明:在正常海水(pH值8.0)条件下,铅浓度为0.00、0.05、0.50 mg/L时,对近江牡蛎CAT活性表现为诱导效应,且诱导效应随铅浓度升高、胁迫时间延长而增强,至20 d时,各组间即表现出显著差异(P<0.05);铅浓度为5.00 mg/L时,对近江牡蛎CAT活性的诱导效应快而强烈,至10 d时,近江牡蛎CAT活性远高于其他各组(P<0.05),但随后又逐渐减弱,至25 d时,与0.05 mg/L组相当,已显著低于0.50 mg/L组(P<0.05)。酸化海水(pH值7.6)条件下,短期内无论铅浓度高或低,均对近江牡蛎CAT活性呈现诱导效应,且铅浓度越高,诱导效应越强;随着胁迫时间延长,诱导效应呈下降趋势,铅浓度越高,CAT活性下降越快,至后期高浓度铅对近江牡蛎CAT活性表现出抑制效应;至30 d时,0.00、0.05、0.50 mg/L组近江牡蛎CAT活性与对照组(pH值7.6、0.00 mg/L)相近,且3组间无明显差异,但5.00 mg/L组近江牡蛎CAT活性显著低于对照组(P<0.05)。由研究结果可见,酸化和铅对近江牡蛎CAT的影响具有协同作用,当铅浓度较低时,近江牡蛎CAT活性主要受pH值影响,当铅浓度达到一定值(5.00 mg/L)后,近江牡蛎CAT活性主要受铅浓度影响,双重胁迫会增加近江牡蛎受损的程度。
Abstract:
-

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备注/Memo

备注/Memo:
收稿日期:2016-05-05
基金项目:国家自然科学基金地区基金(编号:31260139);海南省自然科学基金(编号:314086)。
作者简介:李晓梅(1975—),女,江苏徐州人,硕士,副教授,研究方向为海洋生物学。E-mail:xiaomeili1215@sina.com。
更新日期/Last Update: 2017-04-05