| 王丽,蔡景行,罗沐欣键,吴道明,范洪黎,秦松,范成五.镉胁迫下钝化剂对菠菜生理特征及镉累积的影响[J].农业环境科学学报,2023,42(5):1004-1010. |
| 镉胁迫下钝化剂对菠菜生理特征及镉累积的影响 |
| Effects of passivating agents on physiological characteristics and cadmium accumulation in Spinacia oleracea L. under cadmium stress |
| 投稿时间：2022-10-12 |
| DOI：10.11654/jaes.2022-1018 |
| 中文关键词: 镉 钝化剂 菠菜 抗氧化酶 |
| 英文关键词: cadmium passivating agent Spinacia oleracea L. antioxidant enzyme |
| 基金项目:国家重点研发计划项目（2018YFD0800602） |
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| 摘要点击次数: 897 |
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| 中文摘要: |
| 为了探究不同钝化剂在镉（Cd）胁迫下对蔬菜生理特征及Cd累积的影响，以菠菜为研究对象，设置不施钝化剂（CK）、单施纳米羟基磷灰石（nHAP）、单施巯基生物炭（TMB）、配施纳米羟基磷灰石+巯基生物炭（HPTB） 4个处理进行盆栽试验。通过测定分析土壤pH、有效态Cd含量及菠菜抗氧化酶活性，阐明施用不同钝化剂对Cd胁迫下菠菜生长及Cd累积的影响。结果表明：施加钝化剂能有效提高菠菜生物量，降低菠菜Cd含量。与CK相比，nHAP、TMB、HPTB处理下地上部和地下部生物量分别增加了90.27%、7.28%、143.75%和72.50%、4.81%、91.71%，Cd含量分别降低了78.19%、6.94%、65.49%和65.98%、39.34%、52.31%；不同钝化剂均能提高土壤pH，降低土壤有效态Cd含量。nHAP、TMB、HPTB处理下土壤pH较CK分别提高了1.36、0.08个和0.76个单位，有效态Cd含量分别降低了83.22%、22.57%和73.70%。nHAP处理对菠菜的降Cd效果最好；施用nHAP能够有效增加抗氧化酶活性，降低丙二醛含量，缓解脂膜过氧化伤害。综上，nHAP可作为缓解Cd污染对菠菜产生生理影响的钝化剂。 |
| 英文摘要: |
| The aim of this study was to explore the effects of different passivating agents on the physiological characteristics and cadmium (Cd) accumulation by Spinacia oleracea L. under Cd stress. Pot experiments consisting of no passivating agent application(CK), a single application of nano-hydroxyapatite(nHAP), thiol biochar(TMB), nano-hydroxyapatite + thiol biochar(HPTB) were performed. The effects of different passivating agents on the growth and Cd accumulation of S.oleracea L. under Cd stress were determined by measuring the soil pH, available Cd content, and antioxidant enzyme activity of S.oleracea L. The results showed that the application of a passivating agent effectively increased the biomass and reduced the Cd content of S.oleracea L. Compared with the CK treatment, the nHAP, TMB, and HPTB treatments increased shoot(by 90.27%, 7.28%, and 143.75%, respectively) and root(by 72.50%, 4.81%, and 91.71%, respectively) biomass. Moreover, the Cd concentration decreased by 78.19%, 6.94%, and 65.49%, in the shoots, and by 65.98%, 39.34%, and 52.31% in the roots of plants in the nHAP, TMB, and HPTB treatments, respectively. Different passivators increased the soil pH and reduced the available Cd content of the soil. The soil pH under nHAP, TMB, and HPTB treatments increased by 1.36, 0.08 and 0.76 units, respectively, compared with the soil pH under CK treatment, and the available Cd content decreased by 83.22%, 22.57%, and 73.70%, respectively. nHAP treatment had the greatest effect on decreasing the Cd content in S.oleracea L. The application of nHAP increased the antioxidase activity, decreased the malondialdehyde content, and alleviated injury due to lipid membrane peroxidation. In conclusion, nHAP may be used as a passivator to alleviate the physiological effects of Cd stress on S.oleracea L. |
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