当前位置: 首页 > 文章 > 镉与铜胁迫下无柄小叶榕的生理响应 森林与环境学报 2019 (2) 194-200
Position: Home > Articles > Physiological response of Ficus concinna var. subsessilis under heavy metal cadmium-copper stress Journal of Forest and Environment 2019 (2) 194-200

镉与铜胁迫下无柄小叶榕的生理响应

作  者:
马晓华;张旭乐;钱仁卷;郑坚;陈义增;张庆良
单  位:
浙江省亚热带作物研究所
关键词:
重金属;铜;镉;无柄小叶榕;保护酶系统
摘  要:
为研究无柄小叶榕对土壤中镉(Cd)和铜(Cu)两种重金属的抗性能力,解决日渐严重的城市土壤重金属污染问题,并探讨不同浓度的Cd与Cu胁迫对无柄小叶榕生长生理的影响,以盆栽无柄小叶榕作为试验材料,清水为对照,设置不同浓度的Cd2+和Cu2+16个处理,研究了Cd、Cu胁迫对无柄小叶榕光合作用、丙二醛(MDA)含量及抗氧化酶活性等的影响。结果表明:随着Cd、Cu胁迫浓度升高,无柄小叶榕中超氧化物歧化酶(SOD)、过氧化氢酶(CAT)与过氧化物酶(POD)活性呈逐渐增强的趋势;不同水平的Cd、Cu复合胁迫下,随着重金属胁迫浓度增加,无柄小叶榕植株叶绿素a与叶绿素b含量随着胁迫浓度增加而降低,最低值出现在Cd2+为50 mg·kg-1与Cu2+为400 mg·kg-1处理组,是对照组的32.2%与35.9%。无柄小叶榕可在一定程度上抵抗Cd、Cu产生的胁迫影响。
译  名:
Physiological response of Ficus concinna var. subsessilis under heavy metal cadmium-copper stress
作  者:
MA Xiaohua;ZHANG Xule;QIAN Renjuan;ZHENG Jian;CHEN Yizeng;ZHANG Qingliang;Institute of Subtropical Crops of Zhejiang Province;
关键词:
heavy metal;;copper;;cadmium;;Ficus concinna var. subsessilis;;protective enzyme system
摘  要:
To evaluate the resistance of Ficus concinna var. subsessilis to heavy metal Cd and Cu pollution,a serious problem in urban soil,we researched the effects of Cd and Cu stress on the growth and physiology of F. concinna var. subsessilis. Our study comprised 16 treatments of various Cd2+and Cu2+concentrations,with water treatment as the control. We evaluated the effects of Cd and Cu stress on cytochrome content,photosynthesis,malondialdehyde content,and antioxidant enzyme activity of F. concinna var.subsessilis. The results showed that as Cd and Cu concentrations increased,the activity of superoxide dismutase,catalase,and peroxidase gradually increased. Under different stress levels of Cd and Cu,chlorophyll a and chlorophyll b contents decreased with increasing Cd and Cu concentrations; and the lowest values appeared at 50 mg·kg-1 Cd2+and 400 mg·kg-1 Cu2+,which was 32.2%and 35.9% of the control,respectively. Therefore,F. concinna var. subsessilis exhibits moderate resistance to Cd and Cu stress.

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