Difference of lead uptake and distribution in rice cultivars and its mechanism

Abstract

Abstract: In order to investigate the uptake of lead by rice plant and the distribution of lead in different parts of rice, pot experiment was conducted with 20 rice cultivars of different genotypes by adding lead to soil. The results showed that there existed significant differences among the cultivars in the lead uptake and distribution by rice plants, but the differences had no obvious relationship with rice genotypes. The lead concentrations decreased rapidly from roots to grains along rice plants, so the concentrations of lead were very low in grains compared with other parts of rice plants. The regression analysis showed that there were significant negative correlations between adjacent organs of rice plant, but positive correlations, mostly significant, between disconnected organs, for the lead concentrations in them. Lead concentration in the leaf of heading stage showed a significant positive correlation with that in the grain of ripening stage. Lead was not distributed uniformly in different parts of grain structure, and the lead accumulation in polished rice was only 32.88% of the total lead accumulation in grain.

Key words: Lead, Uptake, Distribution, Rice (Oryza sativa L.)

CLC Number:

X503.231

LIU Jianguo, LI Kunquan, ZHANG Zujian, LU Xiaolong, YU Biyu, CAI Yixia, YANG Jianchang, ZHU Qingsen. Difference of lead uptake and distribution in rice cultivars and its mechanism[J]. Chinese Journal of Applied Ecology, 2004, (2): 291-294.

References

[1] Kabata-Pendias A, Pendias H. 1984. Trace Elements in Soils and Plants. Florida: CRC Press Inc. 154～ 158
[2] Kang L-J(康立娟),Zhao C-A(赵成爱),Li N(李呐).2002Pollution effect and the accumulative rules oflead in the loam soil/rice system.J Jilin Agric Univ(吉林农业大学学报),22(2):68～70(in Chinese)
[3] Li H-F(李花粉).2000.Heavymetals pollution in rhizosphere.Rev China Ag,ic Sci Technol(中国农业科技导报),2(4):54～59(in Chinese)
[4] Lin Q(林琦),Chen H-M(陈怀满),Zheng C-R(郑春荣)2000. Chemical behavior of Cd, Pb and their interaction in rhizosphere and bulk. J Zhejiang Univ(Agric. & Life Sci. ) (浙江大学学报)(农业与生命科学版),26(5):527～532(in Chinese)
[5] Liu J(刘军),Li X-E(李先恩),Wang T(王涛),et al.2002.Chemical form and distribution of lead in medical plants. Agro-Environ Prot(农业环境保护),21(2):143～145(in Chinese)
[6] Liu X-M(刘秀梅),Nie J-H(聂俊华),Wang Q-R(王庆仁)2002. Eco-physiological response of several crops to lead. Agro-Environ Prot(农业环境保护),21(3):201～203(in Chinese)
[7] Malone G, Koeppe DE, Miller RJ. 1974. Localization of lead accumulated by com plants. Plant Physiol, 53: 388～ 394
[8] Mo Z(莫争),Wang C-X(王春霞),Chen Q(陈琴),et al.2002. Form distribution and transformation of heavy metals of Cu,Pb,Zn,Cr and Cd in soils.Agro-Envviron Prot(农业环境保护),21(1) :9～ 12(in Chinese)
[9] Smith CJ, Hopmans P, Cook FJ. 1996. Accumulation of Cr, Pb,Cu, Ni, Zn and Cd in soil following irrigation with treated urban effluent in Australia. Environ Poll, 94:317～323.
[10] Wang K-R(王凯荣),Guo Y(郭焱),He D-Y(何电源),et al 1993. The effect of heavy metal on rice quality. Agro-Environ Prot (农业环境保护),12(6):254～ 257(in Chinese)
[11] Wang SC, Li XD, Zhang G, et al. 2000. Heavy metal in agricultural soils of the Pearl River Delta, South China. Environ Poll,119:33～44
[12] Wang X(王新),Wu y-Y(吴燕玉).1997.Behavior property of heavymetalsin soil-rice system.Chin J Ecol(生态学杂志),16(4):10～14(in Chinese)
[13] Xu J-L(许嘉琳),Bao Z-P(鲍子平),Yang J-R(杨居荣),et al.1991. Chemical forms of Pb, Cd and Cu in crops. Chin J Appl Ecol (应用生态学报),2(3):244～248(in Chinese)
[14] Yang j-R(杨居荣),Bao Z-P(鲍子平),Zhang S-Q(张索芹)1993. The distribution and binding of Cd and Pb in plant cell. China Environ Sci(中国环境科学),13(4):263～268(in Chinese)
[15] Yang J-R(杨居荣),ZhaY(查燕),Liu H(刘虹).1999.The distribution and chemical forms of Cd, Cu and Pb in polluted seeds.ChinaEnviron Sci(中国环境科学),19(6):500～504(in Chinese)
[16] Zha Y(查燕),Yang J-R(杨居荣),Liu H(刘虹),et al.2001. Distribution of heavy metals in polluted crops seeds and the effect of heavy metals in the food processing. Environ Sci ( 环境科学),21(3):52～55(in Chinese)
[17] Zhang S-Q(张素芹),Yang J-R(杨居荣).1992.Absorption and translocation of Cd,Pb and As in crops.Agro-Environ Prot(农业环境保护),11(4):171～175(in Chinese)
[18] Zhang Z-W, Takao W, Shinichiro S, et al. 1998. Lead and cadmium contents in cereals and pulses in north-eastern China. Sci Total Environ, 220:137～ 145
[19] Zhao Q-G(赵其国),Zhou B-Z(周炳中),Yang H(杨浩).2002. Research on environmental quality and agricultural safety of Jiangsu Province. Soil ( 土壤 ), 1:1 ～ 8 ( in Chinese)