Zn、Pb单一及复合胁迫对假苹婆幼苗生长和生理特性的影响  

Effects of Single and Combined Zn and Pb Stress on Growth and Physiological Characteristics of Sterculia lanceolata Seedlings

作　　者：韦燕 陈筱圆 邓力 莫艺莛 王凌晖[1] WEI Yan;CHEN Xiao-yuan;DENG Li;MO Yi-ting;WANG Ling-hui(College of Forestry,Guangxi University,Nanning 530004,China;Guangxi Transportation Science and Technslogy Group Co.Ltd.,Nannin 530007,China;Guangxi State-owned Qinlian Forest Farm,Qinzhou 535424,China)

机构地区：[1]广西大学林学院,广西南宁530004 [2]广西交科集团有限公司,广西南宁530007 [3]广西国有钦廉林场,广西钦州535424

出　　处：《江西农业学报》2022年第12期33-40,共8页Acta Agriculturae Jiangxi

基　　金：广西国有钦廉林场星岛湖树种调整和改造模式研究(钦廉科字2017-1号)。

摘　　要：以1年生假苹婆实生幼苗为供试材料,设置4个Zn处理、4个Pb处理、4个Zn+Pb复合处理以及空白对照组,共13个处理,研究假苹婆对重金属Zn、Pb单一及复合的抗污染能力。试验结果表明:(1)随着处理浓度的增加,在单一Zn处理下,游离脯氨酸(Pro)含量、过氧化物酶(POD)活性、过氧化氢酶(CAT)的活性呈逐渐升高趋势;株高、地径、生物量、可溶性糖含量、可溶性蛋白含量呈逐渐减少趋势;超氧化物歧化酶(SOD)活性、MDA含量呈先增后降的趋势。(2)在单一Pb处理下,可溶性糖含量、可溶性蛋白含量、SOD活性、POD活性呈先升后降的趋势;Pro、CAT活性、MDA含量呈逐渐升高趋势;株高、地径、生物量呈逐渐降低趋势。(3)在Zn+Pb复合处理下,株高、地径、生物量、可溶性糖含量、可溶性蛋白含量呈逐渐降低趋势;Pro、CAT活性和MDA含量呈逐渐升高趋势;SOD活性、POD活性呈先升后降趋势。综上,低浓度Zn、Pb处理能够促进假苹婆幼苗的生长,而高浓度Zn、Pb处理会抑制假苹婆幼苗的生长,且Zn+Pb复合胁迫对假苹婆幼苗的毒害最为严重,研究结论可为假苹婆幼苗种植栽培及其抗性研究、重金属土壤修复研究提供理论依据。The 1-year-old seedlings of Sterculia lanceolata were used as experimental materials.They were treated with 4 Zn treatments,4 Pb treatments,4 Zn+Pb combined treatments and blank control group,with a total of 13 treatments.The results showed that with the increase of treatment concentration,the free proline(Pro)content,peroxidase(POD)activity and catalase(CAT)activity increased gradually under single Zn treatment.Plant height,ground diameter,biomass,soluble sugar content and soluble protein content showed a decreasing trend.The activity of superoxide dismutase(SOD)and the content of MDA increased first and then decreased.Under single Pb treatment,soluble sugar content,soluble protein content,SOD activity and POD activity increased first and then decreased.The activities of Pro,CAT and MDA contents increased gradually.Plant height,ground diameter and biomass showed a gradually decreasing trend.Under Zn+Pb combined treatment,plant height,ground diameter,biomass,soluble sugar content and soluble protein content showed a decreasing trend.The activities of Pro,CAT and MDA contents increased gradually.SOD activity and POD activity increased first and then decreased.In conclusion,low concentrations of Zn and Pb promoted the growth of Sterculia lanceolata seedlings,while high concentrations of Zn and Pb inhibited the growth of Sterculia lanceolata seedlings,and the toxicity of Sterculia lanceolata seedlings was the most serious under the combined stress of Zn+Pb.The results of this study can provide a theoretical basis for the cultivation of Sterculia lanceolata seedlings,resistance research and heavy metal soil remediation research.

关 键 词：假苹婆幼苗 Zn胁迫 PB胁迫 Zn+Pb复合胁迫 生理 

分 类 号：S686[农业科学—观赏园艺]