铅镉复合胁迫下黄葛树和女贞的生长生理及吸收特性研究
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摘要
以黄葛树、女贞为试验材料,通过盆栽试验研究不同浓度铅镉复合胁迫下黄葛树、女贞的生长生理变化及吸收积累铅镉特性,采用主成分分析和隶属函数法综合评价2个树种对铅镉复合污染土壤的适应性,旨在探究2个树种对铅镉污染土壤的修复潜力。结果表明:铅镉复合胁迫下2个树种株高、地径增长受抑制,生物量下降,总叶绿素降低,丙二醛含量增加;耐铅镉性综合得分值表明黄葛树耐性更强。黄葛树根部铅积累量更大,地上部和根部镉积累量均为女贞更大。复合污染中镉促进女贞对铅的吸收,抑制黄葛树对铅的积累,铅促进重度镉水平下2个树种对镉的累积。可见,黄葛树对铅镉复合胁迫的耐性强于女贞,用于修复铅镉复合污染土壤具有一定潜力,女贞则不适用于复合污染土壤中镉浓度较高的区域。
Taking Ficus virens and Ligustrum lucidum as experimental materials, the growth physiological changes and absorption and accumulation characteristics of Pb and Cd of F. virens and L. lucidum under different Pb and Cd concentration were studied by pot experiment. The adaptability of the 2 tree species to Pb and Cd contaminated soil was comprehensively evaluated by principal component analysis and membership function method,aiming at exploring the remediation potential of the 2 tree species to Pb and Cd contaminated soil. The results showed that under the combined stress of Pb and Cd, the growth of plant height and ground diameter of the 2 tree species was inhibited, biomass decreased, total chlorophyll decreased and MDA content increased. The comprehensive score of lead and cadmium tolerance showed that F. virens was more tolerant. Pb accumulation in root of F. virens was more than L. lucidum. Cd accumulation in root and shoot of L. lucidum was more than F. virens. Cd promoted the absorption of Pb by L. lucidum and inhibited the accumulation of Pb by F. virens in the compound pollution. Pb promoted the accumulation of Cd by 2 tree species under heavy Cd level. The results show that F.virens is more tolerant to Pb and Cd combined stress than L. lucidum, and has a certain potential for remediation of Pb and Cd combined contaminated soil, while L. lucidum is not suitable for areas with high Cd concentration in combined contaminated soil.
Taking Ficus virens and Ligustrum lucidum as experimental materials, the growth physiological changes and absorption and accumulation characteristics of Pb and Cd of F. virens and L. lucidum under different Pb and Cd concentration were studied by pot experiment. The adaptability of the 2 tree species to Pb and Cd contaminated soil was comprehensively evaluated by principal component analysis and membership function method,aiming at exploring the remediation potential of the 2 tree species to Pb and Cd contaminated soil. The results showed that under the combined stress of Pb and Cd, the growth of plant height and ground diameter of the 2 tree species was inhibited, biomass decreased, total chlorophyll decreased and MDA content increased. The comprehensive score of lead and cadmium tolerance showed that F. virens was more tolerant. Pb accumulation in root of F. virens was more than L. lucidum. Cd accumulation in root and shoot of L. lucidum was more than F. virens. Cd promoted the absorption of Pb by L. lucidum and inhibited the accumulation of Pb by F. virens in the compound pollution. Pb promoted the accumulation of Cd by 2 tree species under heavy Cd level. The results show that F.virens is more tolerant to Pb and Cd combined stress than L. lucidum, and has a certain potential for remediation of Pb and Cd combined contaminated soil, while L. lucidum is not suitable for areas with high Cd concentration in combined contaminated soil.
引文
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[17]Chen L, Han Y, Jiang H, et al. Nitrogen nutrient status induces sexual differences in responses to cadmium in Populus yunnanensis[J]. Journal of Experimental Botany, 2011, 62:5037-5050.
[18]吴月燕,陈赛,张燕忠,等.重金属胁迫对5个常绿阔叶树种生理生化特性的影响[J].核农学报, 2009,23(5):843-852.
[19]许艳萍,郭孟璧,张庆滢,等.铅胁迫对工业大麻苗期生理生化及富集特征的影响[J].西部林业科学,2018, 47(3):1-6.
[20]张思悦.黄葛树对土壤Pb、Cd污染的修复潜力研究[D].重庆:西南大学, 2018.
[21]王君,严小莉,李凌,等.不同种源麻栎幼苗对Cd2+、Pb2+复合污染的吸收累积特性[J].林业科学, 2014,50(7):23-30.
[22]熊春晖,许晓光.铅镉复合胁迫下莲藕对铅镉的富集及其生理变化[J].园艺学报, 2012, 39(12):2385-2394.
[2]武文飞,南忠仁,王胜利,等.单一与复合胁迫下油菜对镉、铅的吸收效应[J].环境科学, 2012, 33(9):3253-3260.
[3]环境保护部,国土资源部.全国土壤污染状况调查公报[EB/OL].(2014-4-17)[2019-1-27]. http://www.gov.cn/foot/sitel/20140417/782bcb888408/4ba158d01.pdf.
[4]张家洋,冯明,许飞,等.锌镉单一胁迫荠菜和地肤子的生长特性及对重金属的积累特征[J].西南林业大学学报(自然科学), 2019, 39(1):43-49.
[5]Murtaza B, Naeem F, Shahid M, et al. A multivariate analysis of physiological and antioxidant responses and health hazards of wheat under cadmium and lead stress[J]. Environmental Science and Pollution Research, 2019, 26(1):362-370.
[6]钟斌,陈俊任,彭丹莉,等.速生林木对重金属污染土壤植物修复技术研究进展[J].浙江农林大学学报,2016, 33(5):899-909.
[7]陈良华,徐睿,杨万勤,等.镉污染条件下香樟和油樟对镉的吸收能力和耐性差异[J].生态环境学报,2015, 24(2):316-322.
[8]生态环境部.土壤环境质量农用地土壤污染风险管控标准(试行):GB 15618—2018[S].北京:中国环境科学出版社, 2018.
[9]杨剑虹,王成林,代亨林.土壤农化分析与环境监测[M].北京:中国大地出版社, 2008.
[10]高俊凤.植物生理学实验指导[M].北京:高等教育出版社, 2015.
[11]鲁艳,谌月,李凌.香樟、君迁子实生苗对土壤Cd2+污染的修复潜力研究[J].西南师范大学学报(自然科学版), 2017, 42(11):44-51.
[12]陈柯罕,张科,李取生,等. 4种盐生植物对Cd、Pb复合污染提取修复效果比较研究[J].农业环境科学学报, 2017, 36(3):458-465.
[13]李元,祖艳群.重金属污染生态与生态修复[M].北京:科学出版社, 2016.
[14]董春燕.镉胁迫对三叶草种子形态指标、光合色素含量及酶活性的影响[J].西部林业科学, 2018, 47(6):35-39,44.
[15]Mahrukh Z, Mehak S, Qurban A, et al. Rhizobacteria and phytoremediation of heavy metals[J]. Environmental Technology Reviews, 2016, 5(1):112-119.
[16]张家洋,陈丽丽,楚莉莉,等.锌镉单一胁迫对小麦和稗草生理生化特性的影响[J].西南林业大学学报(自然科学), 2018, 38(6):89-96.
[17]Chen L, Han Y, Jiang H, et al. Nitrogen nutrient status induces sexual differences in responses to cadmium in Populus yunnanensis[J]. Journal of Experimental Botany, 2011, 62:5037-5050.
[18]吴月燕,陈赛,张燕忠,等.重金属胁迫对5个常绿阔叶树种生理生化特性的影响[J].核农学报, 2009,23(5):843-852.
[19]许艳萍,郭孟璧,张庆滢,等.铅胁迫对工业大麻苗期生理生化及富集特征的影响[J].西部林业科学,2018, 47(3):1-6.
[20]张思悦.黄葛树对土壤Pb、Cd污染的修复潜力研究[D].重庆:西南大学, 2018.
[21]王君,严小莉,李凌,等.不同种源麻栎幼苗对Cd2+、Pb2+复合污染的吸收累积特性[J].林业科学, 2014,50(7):23-30.
[22]熊春晖,许晓光.铅镉复合胁迫下莲藕对铅镉的富集及其生理变化[J].园艺学报, 2012, 39(12):2385-2394.
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