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首页> 外文期刊>Journal of Environmental Management >Biochar alleviates Cd phytotoxicity by minimizing bioavailability and oxidative stress in pak choi (Brassica chinensis L.) cultivated in Cd-polluted soil
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Biochar alleviates Cd phytotoxicity by minimizing bioavailability and oxidative stress in pak choi (Brassica chinensis L.) cultivated in Cd-polluted soil

机译：生物炭可通过最大程度地降低Cd污染土壤中种植的青菜的生物利用度和氧化胁迫来减轻Cd的植物毒性。

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摘要

The production of leafy vegetables such as Brassica chinensis L. in cadmium (Cd)-polluted soil causes serious threats to human health and food safety around the globe. A pot culture was established to examine the efficacy of rice-straw induced biochar (applied to soil at the rate of 0%, 2.5% and 5%, w/w) on growth, gaseous exchange attributes, antioxidative capacities and Cd uptake in pak choi (Brassica chinensis L), when soil was spiked with Cd (CdCl2) at 0, 5, 10 and 20 mg kg(-1) soil. The results revealed that Cd stress significantly (P < 0.05) reduced plant biomass and physiological attributes, and accumulated higher Cd concentrations in plant tissues with the increasing rate of Cd concentration in the soil. However, incorporation of biochar at 5% application rate prominently increased the shoot (98.27%) and root (85.96%) dry biomass, net photosynthesis (45.52%), transpiration rate (161.34%), stomatal activity (111.76%) and intracellular CO2 concentration (32.25%) when Cd was added at 20 mg kg(-1) soil, relative to the respective treatment without biochar. Whereas, incorporation of biochar at 5% significantly reduced the bioavailable Cd by 16.64% under 20 mg kg(-1) soil, compared to respective Cd treatment without biochar.Similarly, Cd accumulation in shoots and roots was decreased by 42.49% and 29.23%, and thereby reduced leaf MDA and H2O2 contents by 21.45% and 31.28%, respectively, at 20 mg Cd kg(-1) spiked soil relative to without biochar amended soil. An increment was noticed in the activities of guaiacol peroxidase (POD), superoxide dismutase (SOD), ascorbate peroxidase (APX), catalase (CAT) and glutathione (GSH) by 37.31%, 66.35%, 115.94%, 122.72% and 59.96%, respectively, with 5% biochar addition in 20 mg kg(-1) Cd spiked soil. Moreover, biochar induced a synergistic impact on plants by increasing soil alkalinization and thereby reducing Cd phytotoxicity throughimmobilization. Overall, results proposed that rice-straw biochar has an ability to restore Cd polluted soil and increased pak choi production and thereby reduced food security risks in polluted soil.
机译：在镉（Cd）污染的土壤中生产多叶蔬菜，例如芸苔属植物，对全球人类健康和食品安全构成严重威胁。建立盆栽栽培技术以检查稻草诱导的生物炭（以0％，2.5％和5％，w / w的比例施于土壤）对白菜生长，气体交换特性，抗氧化能力和Cd吸收的功效菜（Brassica chinensis L），当土壤分别以0、5、10和20 mg kg（-1）的镉（CdCl2）加标时。结果表明，随着土壤中Cd浓度的增加，Cd胁迫显着（P <0.05）降低了植物的生物量和生理特性，并在植物组织中积累了较高的Cd浓度。然而，以5％的比例施用生物炭显着增加了枝条（98.27％）和根（85.96％）的干生物量，净光合作用（45.52％），蒸腾速率（161.34％），气孔活性（111.76％）和细胞内CO2相对于没有生物炭的相应处理，在20 mg kg（-1）的土壤中添加Cd时的最大浓度（32.25％）。相比之下，与不施用生物炭的相应Cd处理相比，在20 mg kg（-1）的土壤中加入5％的生物炭显着降低了16.64％的生物有效性Cd。同样，茎和根中Cd的积累减少了42.49％和29.23％ ，与未施用生物炭改良土壤相比，在20 mg Cd kg（-1）加标土壤中，叶片MDA和H2O2含量分别降低了21.45％和31.28％。愈创木酚过氧化物酶（POD），超氧化物歧化酶（SOD），抗坏血酸过氧化物酶（APX），过氧化氢酶（CAT）和谷胱甘肽（GSH）的活性增加了37.31％，66.35％，115.94％，122.72％和59.96％ ，分别在20 mg kg（-1）Cd加标土壤中添加5％的生物炭。此外，生物炭通过增加土壤碱化从而通过固定减少镉的植物毒性而对植物产生协同作用。总体而言，结果表明稻草生物炭具有恢复Cd污染土壤和增加白菜产量的能力，从而减少了污染土壤中的粮食安全风险。

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  • 来源
    《Journal of Environmental Management》 |2019年第15期|109500.1-109500.12|共12页
  • 作者

    Kamran Muhammad; Malik Zaffar; Parveen Aasma; Zong Yutong; Abbasi Ghulam Hassan; Rafiq Muhammad Tariq; Shaaban Muhammad; Mustafa Adnan; Bashir Saqib; Rafay Muhammad; Mehmood Sajid; Ali Muhammad;

  • 作者单位

    Huazhong Agr Univ Minist Agr Key Lab Arable Land Conservat Middle & Lower Reac Wuhan 430070 Hubei Peoples R China;

    Islamia Univ Bahawalpur Univ Coll Agr & Environm Sci Dept Soil Sci Bahawalpur 63100 Pakistan|Zhejiang Univ Zhejiang Prov Key Lab Agr Resources & Environm Coll Environm & Resource Sci Hangzhou 310058 Zhejiang Peoples R China;

    Islamia Univ Bahawalpur Univ Coll Agr & Environm Sci Dept Soil Sci Bahawalpur 63100 Pakistan;

    Zhejiang Univ Zhejiang Prov Key Lab Agr Resources & Environm Coll Environm & Resource Sci Hangzhou 310058 Zhejiang Peoples R China;

    Zhejiang Univ Zhejiang Prov Key Lab Agr Resources & Environm Coll Environm & Resource Sci Hangzhou 310058 Zhejiang Peoples R China|Int Islamic Univ Ctr Integrated Res Basic Sci Islamabad 44000 Pakistan;

    Bahauddin Zakariya Univ Fac Agr Sci & Technol Dept Soil Sci Multan 60800 Pakistan;

    Chinese Acad Agr Sci Inst Agr Resources & Reg Planning Natl Engn Lab Improving Qual Arable Land Beijing 100081 Peoples R China;

    Ghazi Univ Dept Soil & Environm Sci Dera Ghazi Khan 32200 Pakistan;

    Islamia Univ Bahawalpur Univ Coll Agr & Environm Sci Dept Forestry & Wildlife Bahawalpur 63100 Pakistan;

    Guangzhou Univ Dept Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Rice-straw biochar; Pak choi; Gas exchange attributes; Antioxidants; Cd bioavailability; Soil remediation;

    机译：稻草生物炭白菜;气体交换属性;抗氧化剂;镉的生物利用度;土壤修复;

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