Responses of Conyza canadensis to different concentrations of copper in soil

Abstract

Abstract: Through pot experiment and physiological-biochemical analysis,the study showed that the electric conductivities of Conyza canadensis collected from heavy Cu pollution (Ⅰ),light Cu pollution (Ⅱ) and control (Ⅲ) sites were enhanced,while the chlorophyll (a+b) contents were reduced with increasing Cu concentration.The protein and proline contents in Ⅰ were increased at first and then reduced,but those in Ⅱ and Ⅲ were reduced with increasing Cu concentration.The activities of SOD,POD and CAT were intensified under Cu stresses.When the Cu concentration was 1 200 mg·kg^-1,their activities in Ⅰ,Ⅱ and Ⅲ were increased 194.1%,206.2% and 118.6%,170.1%,182.9% and 111.3%,and 115.1%,155.4% and 107.3%,respectively,in comparing with the control,which illustrated that the tolerance of Conyza canadensis was in order of heavy Cu pollution site>light Cu pollution site >control site,and the three ecotypes showed distinct differences in tolerance.

Key words: Conyza canadensis, Tolerance, Heavy metal

CLC Number:

X171.5

DING Jiahong, LIU Dengyi, LI Zheng, WANG Guanglin . Responses of Conyza canadensis to different concentrations of copper in soil[J]. Chinese Journal of Applied Ecology, 2005, 16(4): 668-672.

References

[1] Abuzid MM. 1992. Copper pollution on plants and the uptake of heavy metals by com seedlings. Moscow Univ Soil Sci Bull, 47(3):37～39
[2] Barker AJM, Brooks RR, Pease AJ, et al. 1983. Studies on copper and cobalt tolerance in three closey related taxa within the genus Silence L. (Caryophyllance) from Zaire. Plant Soil, 73:377～385
[3] BiC-J(毕春娟),ChenZ-L(陈振楼),ZhengX-M(郑祥民).2000.Research progressin rhizosphere heavy metals.Fujian Geogr(福建地理),15(3):29～32(in Chinese)
[4] Bi C-J(毕春娟),Chen Z-L(陈振楼),Xu S-Y(许世远),et al.2003. Distribution and accumulation of heavy metals in plants and rhizosphere sediments at tidal flat in Changjiang estuary. Bull Miner Petrol Geochem(矿物岩石地球化学通报),22:38～41(in Chinese)
[5] Chen Y-J(陈有槛),Tao S(陶澍),Deng B-S(邓宝山),et al.2000.Variation of copper and lead fractions in wheat rhizosphere soil. Acta Sci Circ(环境科学学报),20(3):365～369(in Chinese)
[6] Chen HM, Zheng CR, Wang SQ, et al. 2000. Combined pollution and pollution index of heavy metals in red soil. Pedosphere, 10(2):117～124
[7] He H-M(何和明).1996.Trace elements in some medicinal plnts in Xinlong,Hainan.Acta Phytoecol Sin(植物生态学报),20(3):285～291(in Chinese)
[8] He M-C(何孟常),Ji H-B(季海冰),Zhao C-Y(赵承易),et al.2002.Preliminary study of heavy metal pollution in soil and plant near antimony mine area.J Beijing Normal Univ(Nat Sci)(北京师范大学学报·自然科学版),38(3):417～420(in Chinese)
[9] Hu Z-Y(胡正义),Shen H(沈宏),Cao Z-H(曹志洪).2000.Distribution of Cu in soil-crop system polluted by Cu.Environ Sci (环境科学),21(2):62～65(in Chinese)
[10] Liao J-F(廖金凤).1999.The contents of trace elements in rubber trees in Hainan Province.Acta Sci Univ Sunyatseni(中山大学学报·自然科学版),38(supp.):121～125(in Chinese)
[11] Lin Q(林琦),Chen H-M(陈怀满),Zheng C-R(郑春荣),et al.2002.Confomation transformation fo lead in rhizosphere.Chin J Appl Ecol(应用生态学报),13(9):1145～1149(in Chinese)
[12] Liu D-Y(刘登义),Tian S-N(田胜尼),Yang S-Y(杨世勇),et al.2002.Effect of copper mine tailings on seed germination snd seedling growth of five legumes species.Chin J Appl Ecol(应用生态学报),13(5):596～600(in Chinese)
[13] Long J(龙健),Huang C-Y(黄昌勇),Teng Y(滕应),et al.2003. Tolerance to heavy metals of Vetiveria zizanioides and some herbages in Tiantai Lead-Zinc Mine. Chin J Appl Environ Biol (应用与环境生物学报),9(3):226～229(in Chinese)
[14] Luo B-Q(罗炳锵).1990.Effect of micro-elements in Chinese medicine.J Chin Medic Mater(中药材),(5):265(inChinese)
[15] Qi J-S(祁俊生),Xu H-B(徐辉碧),Zhou J-Y(周井炎).1998.Factor analysis and cluster analysis oftrace elements in some Chinese medicinal herbs.Chin J Anal Chem(分析化学),26(11):1309(in Chinese)
[16] Shangguan T-L(上官铁梁),Zhang H(张红),Xi Y-Y(席玉英).2001.The research of the chemical-ore element of Danyang rare plantwith short peony.Plant Res(植物研究),21(2):262～265(in Chinese)
[17] Sun Q-Y(孙庆业),Liu F-C(刘付程).1998.Study on the effects of physical and chemical property changes of copper mine tailingson vegetation rehabilitationin Tonling Copper Mine. Rural Eco-Environ(农村生态环境),14(1):21～23(in Chinese)
[18] Tessier A.1979.Sequential extraction procedure for the speciation of particulate trace metals.Anal Chem,51:844～851
[19] Wang J-H(王景华).1987.The Chemical Element in Hainan Islands Soil and Plant.Beijing:Science Press.77～105(in Chinese)
[20] Zhang M(张敏),Jiang J-H(江建华),Xu J(徐洁).2000.Feasibility study of reclamation of copper-ore-tailings reservoir for planting peony.Shanghai Sci Circ(上海环境科学),19(12):585～587(in Chinese)
[21] Zhou L-B(周连碧),Dai H-W(代宏文),Wu Y-J(吴亚军),et al.2002.Study on vegetation and crops planting at Hujiayu copper mine tailingsponds.MiningTechnol(采矿技术),2(2):54～56(in Chinese)
[22] Zhou L-B(周连碧),Dai H-W(代宏文),Wu Y-J(吴亚军).2003.Vegetation and crops planting at copper mine tailings ponds.Nonferrous Metals(有色金属),55(supp.):58～62(in Chinese)