EFFECTS OF PESTICIDE ADJUVANTS ON MEMBRANE LIPID-COMPOSITION AND FLUIDITY IN LEMNA-MINOR

被引:6
作者
CAUX, PY
WEINBERGER, P
SZABO, A
机构
[1] UNIV OTTAWA,DEPT BIOL,OTTAWA K1N 6N5,ON,CANADA
[2] NATL RES COUNCIL CANADA,INST BIOL SCI,OTTAWA K1A 0R6,ON,CANADA
来源
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE | 1993年 / 71卷 / 10期
关键词
ADJUVANTS; LEMNA MINOR; MEMBRANES; LIPIDS; FLUIDITY;
D O I
10.1139/b93-154
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Lemna minor L. plants were exposed to 40 mu M of the pesticide adjuvants Triton(R) X-15, X-35, X-100, and X-114 for a period of 2 weeks under laboratory conditions. Investigation on the individual principal phospholipids in Lemna membranes (phosphatidyl-choline, -ethanolamine, -glycerol, and -inositol) showed an increase in phosphatidyl-choline and -ethanolamine and a decrease in phosphatidyl-glycerol and -inositol. An analysis of the percentages of fatty acids of the phospholipids indicated a differential Triton(R) effect on phosphatidyl-ethanolamine; the hydrophobic adjuvants (Triton(R) X-15 and X-35) induced a greater unsaturation than the hydrophilic adjuvants (Triton(R) X-114 and X-100). Membrane lipid order was also perturbed as the membrane lipid fluidity of chloroplast membranes as determined by fluorescence polarization increased following adjuvant treatment. Radiolabelled investigations with two Triton(R) isotopes (C-14 ring labelled X-35 and X-100) showed membrane lipid to adjuvant ratios in chloroplasts at 100:4 for X-35 and 100:2 for X-100. This investigation further substantiates the fact that some adjuvants in pesticide formulations are not inert and can be phytotoxic.
引用
收藏
页码:1291 / 1297
页数:7
相关论文
共 46 条
[1]   TOXICITY OF SYNTHETIC DETERGENTS TO FISH AND AQUATIC INVERTEBRATES [J].
ABEL, PD .
JOURNAL OF FISH BIOLOGY, 1974, 6 (03) :279-298
[2]  
ALOIA RC, 1983, MEMBRANE FLUIDITY BI, V2
[3]  
BARTLETT M. S., 1937, J. Roy. Statist. Soc., (Suppl.), V4, P137
[4]  
BERY WO, 1977, ENVIRON POLLUT, V13, P229
[5]  
BLIGH EG, 1959, CAN J BIOCH PHYSL, V37, P91
[6]   BIOLOGICAL EFFECTS OF SURFACTANTS, III HYDRA AS A HIGHLY SENSITIVE ASSAY ANIMAL [J].
BODE, H ;
ERNST, R ;
ARDITTI, J .
ENVIRONMENTAL POLLUTION, 1978, 17 (03) :175-185
[7]   LEMNA-MINOR MEMBRANES AFFECTED BY ADJUVANTS [J].
CAUX, PY ;
WEINBERGER, P .
ENVIRONMENTAL POLLUTION, 1993, 81 (02) :151-156
[8]  
CAUX PY, 1988, ENVIRON TOXICOL CHEM, V7, P671, DOI 10.1897/1552-8618(1988)7[671:APSOTE]2.0.CO
[9]  
2
[10]  
CAUX PY, 1986, ENVIRON TOXICOL CHEM, V5, P1047, DOI [10.1897/1552-8618(1986)5[1047:DAESA]2.0.CO