镉对广蜜二号南瓜幼苗生长与镉累积特性的影响  

Effects of cadmium on the growth and cadmium accumulation characteristicsof Guangmi 2 miben pumpkin seedlings

作　　者：孟琦涛 徐颖超 朱吉童 曾霖根 傅曼琴[3] 聂呈荣[1] 钟玉娟[2] MENG Qitao;XU Yingchao;ZHU Jitong;ZENG Lin'gen;FU Manqin;NIE Chengrong;ZHONG Yujuan(School of Food Science and Engineering,Foshan University of Science and Technology,Foshan 528231,Guangdong,China;Key Laboratory of New Vegetable Technology of Guangdong Province/Institute of Vegetable Research,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,Guangdong,China;Key Laboratory of Functional Food,Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Processing of Agricultural Products/Sericulture and Processing Institute of Agricultural Products,Guangdong Academy of Agricultural Sciences,Guangzhou 510610,Guangdong,China)

机构地区：[1]佛山科学技术学院食品科学与工程学院,广东佛山528231 [2]广东省蔬菜新技术研究重点实验室·广东省农业科学院蔬菜研究所,广州510640 [3]农业农村部功能食品重点实验室·广东省农产品加工重点实验室·广东省农业科学院蚕业与农产品加工研究所,广州510610

出　　处：《中国瓜菜》2024年第5期90-97,共8页China Cucurbits And Vegetables

基　　金：广东省农业科学院食品营养与健康研究中心建设运行经费(XTXM 202205);广西科技计划项目(桂科AB23026076)。

摘　　要：镉(Cd)是一种毒性强且分布广的重金属污染物,不仅影响植物生长发育,而且危害人类健康。为了更好地了解Cd在南瓜中的迁移规律,深入探究Cd对植物的毒害机制和植物的防御反应,将广蜜二号南瓜在4种不同质量浓度(1、3、5、7 mg·L^(-1))的Cd SO_(4)·8H_(2)O溶液中培养28 d,对其生长指标、抗氧化酶活性、Cd吸收转运等特征进行分析。结果表明,随着Cd质量浓度升高,Cd积累量表现为根部高于茎和叶,Cd胁迫提高了广蜜二号南瓜幼苗叶片的超氧化物歧化酶、过氧化物酶、过氧化氢酶活性及丙二醛含量。当溶液中Cd质量浓度较低(1 mg·L^(-1))时,Cd对广蜜二号南瓜幼苗生长无抑制作用,而当溶液中Cd质量浓度≥3 mg·L^(-1)时,对南瓜幼苗的生长抑制程度加重。Cadmium(Cd),a highly toxic and widely distributed heavy metal pollutant,not only affects plant growth and development,but also endangers human health.In order to better understand the migration rule of cadmium in pumpkin,and deeply explore the toxic mechanism of cadmium to plants and the defense response of plants,in this study,Guangmi 2 Miben pumpkin was planted in 4 different concentrations(1,3,5,7 mg·L^(-1))of CdSO_(4)·8H_(2)O solution for 28 days,and its growth parameters,antioxidant enzyme activity,cadmium absorption and transport characteristics were analyzed.With the increase of cadmium concentration,the accumulation of cadmium was higher in roots than in stems and leaves,and the activity of superoxide dismutase,peroxidase and catalase and the content of malondialdehyde in leaves of Guangmi 2 Miben pumpkin were increased under cadmium stress.When the concentration of Cd in the solution is low(1 mg·L^(-1)),Cd has no inhibitory effect on the growth of Guangmi 2,while the concentration of Cd in the solution is above 3 mg·L^(-1),the growth inhibition degree of pumpkin is increased with the increase of the concentration of cadmium in the culture solution.

关 键 词：广蜜二号 镉 幼苗生长 生理特性 

分 类 号：S642.1[农业科学—蔬菜学]