The influence of chlorsulfuron and metsulfuron methyl on root growth and on the ultrastructure of root tips of germinating maize seeds

被引:16
作者
Flaburiari, A [1 ]
Kristen, U [1 ]
机构
[1] UNIV HAMBURG,INST ALLGEMEINE BOT,D-22609 HAMBURG,GERMANY
关键词
herbicides; chlorsulfuron; metsulfuron methyl; root tip ultrastructure; root growth; Zea mays;
D O I
10.1007/BF00015407
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Seeds of Zea mays L., germinating in soil, were exposed to very low doses of the sulfonylurea herbicides chlorsulfuron and metsulfuron methyl. At a concentration of 0.012 mg L(-1), chlorsulfuron caused 72% and metsulfuron methyl 55% growth reduction of the young primary roots. Both herbicides also caused obvious injuries to the root tips. Scanning electron microscopic observations of the root tip surfaces indicated an inhibition of slime secretion at a herbicide concentration of 1.5 mg L(-1). Transmission electron microscopy revealed obvious changes to the nuclei and deformation of radial cell walls in the primary root cortex at 0.012 and 1.5 mg L(-1) for both herbicides. Moreover, the secretory cells of the root cap periphery showed partially irregular deposition of premature cell wall or slime material at a concentration of 0.012 mg L(-1) of both herbicides. From the results of our electron microscopic observations we conclude that the primary roots of maize seedlings are seriously affected by extremely low concentrations of even those herbicides which (as chlorsulfuron and metsulfuron methyl) have been developed to inhibit the growth of dicotyledonous weeds. Moreover, we suggest that the frequently observed growth retardation of crop seedlings is a consequence of early root tip injuries caused by herbicide residues in the soil.
引用
收藏
页码:19 / 28
页数:10
相关论文
共 24 条
[1]   ENVIRONMENTAL FATE OF SULFOMETURON METHYL IN AEROBIC SOILS [J].
ANDERSON, JJ ;
DULKA, JJ .
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 1985, 33 (04) :596-602
[2]   NUCLEAR CHROMATIN STRUCTURE IN RELATION TO CELL-DIFFERENTIATION AND CELL ACTIVATION IN THE CAP AND QUIESCENT CENTER OF ZEA-MAYS-L [J].
BARLOW, PW .
JOURNAL OF EXPERIMENTAL BOTANY, 1985, 36 (170) :1492-1503
[3]   COMPARISON OF TRIFLURALIN, ORYZALIN, PRONAMIDE, PROPHAM, AND COLCHICINE TREATMENTS ON MICROTUBULES [J].
BARTELS, PG ;
HILTON, JL .
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY, 1973, 3 (04) :462-472
[4]  
Beyer EM., 1988, HERBICIDES CHEM DEGR, V3, P117
[5]  
CLOWES FAL, 1970, ANN BOT, V35, P249
[6]  
DYER WE, 1984, EFFECT CHLOROSULFURO
[7]   ULTRASTRUCTURAL RESPONSES OF ROOT CAPS TO THE HERBICIDES CHLORSULFURON AND METSULFURON METHYL [J].
FAYEZ, KA ;
GERKEN, I ;
KRISTEN, U .
PLANT AND SOIL, 1994, 167 (01) :127-134
[8]  
FAYEZ KA, 1996, INP RESS ENV EXP BOT
[9]  
GERSTERBERGER P, 1978, Berichte der Deutschen Botanischen Gesellschaft, V91, P381
[10]  
HESS D, 1974, J CELL SCI, V15, P429