首页|土壤镉对龙牙百合生长过程中生理生化特性的影响

土壤镉对龙牙百合生长过程中生理生化特性的影响

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为探究土壤不同含量Cd对龙牙百合生长及其生理生化指标的影响，设置对照(无Cd)、低(0。86 mg·kg-1)、中(2。16 mg·kg-1)、高(4。76 mg·kg-1)Cd含量的盆栽实验进行研究。结果表明:随着土壤Cd含量的增加，龙牙百合植株的生长量和叶片中叶绿素含量呈上升趋势;龙牙百合各部位Cd含量分布为下盘根>叶>地上茎>地下茎>上盘根>鳞茎，各处理下鳞茎Cd含量最低，最安全。在中浓度Cd处理下，百合下盘根的富集能力大于上盘根。土壤Cd浓度增加显著提高了龙牙百合鳞茎向地下茎的转移系数(P<0。05)。百合叶、地上茎、鳞茎和下盘根的丙二醛含量在高浓度Cd处理下分别显著提高了11。72%、11。31%、133。72%和79。37%(P<0。05)，而超氧化物歧化酶和过氧化氢酶活性整体随Cd含量升高呈先上升后下降趋势。研究表明，龙牙百合有较强的耐Cd能力。
Effects of soil cadmium on physiological and biochemical characteristics of Lilium brownii var.viridulum during its growth
The aim of this study was to investigate the effects of different concentrations of Cd in soil on the growth and physiological and biochemical indexes of Lilium brownii var.viridulum.A pot experiment consisting of without Cd and a concentration gradient ranging from low(0.86 mg·kg-1)to medium(2.16 mg·kg-1)to high(4.76 mg·kg-1)Cd was performed.The results showed that the growth of Lilium brownii var.viridulum plants and the chlorophyll content in leave increased with increase of Cd concentration in the soil.The distribution of Cd content in the different parts of the plant was aboveground lower root>leaf>stem>underground stem>upper root>bulb.Thus,the Cd content of the bulb was the lowest and the safest under each concentration treatment.Under the medium concentration of Cd treatment,the enrichment capacity of Lilium root was greater than that of upper root.Soil Cd significantly increased the transfer coefficient of the bulb to underground stem of Lilium brownii var.viridulum(P<0.05).In addition,the malondialdehyde contents of lily leaves,above-ground stem,bulb,and underground root were significantly increased by 11.72%,11.31%,133.72%,and 79.37%,respectively,under the high concentration of Cd treatment(P<0.05),while superoxide dismutase and catalase enzymes first increased and then decreased.Therefore,Lilium brownii var.viridulum has a strong tolerance to Cd.

cadmiumsoilLilium brownii var.viridulumphysiological responsetransfer coefficientantioxidant enzymes

吴家萌、黄雅媛、把德功、王薪琪、覃思、邓玉玲、雍志标、雷鸣

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湖南农业大学环境与生态学院,长沙 410128

湖南农业大学食品科学技术学院,长沙 410128

湖南山水青杨环保科技有限公司,长沙 410000

镉 土壤 龙牙百合 生理响应 转移系数 抗氧化酶

国家自然科学基金青年基金国家重点研发计划长江生态环境保护修复城市驻点跟踪研究任务项目(第二期)湖南省自然科学基金长沙市自然科学基金

422070432019YFL6049032022-LHYJ-02-0507-012022JJ40179kq2202217

2024

10.11654/jaes.2023-0594

农业环境科学学报
农业部环境保护科研监测所 中国农业生态环境保护协会

农业环境科学学报

CSTPCD北大核心
影响因子：1.52
ISSN：1672-2043
年,卷(期)：2024.43(5)
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