文档介绍：Agricultural Science& Technology, 2010, 11( 7): 45- 48
Copyright
2010, Information Institute ofHAAS. All rights reserved. Agronomy
Effects of D ifferent K inds of Exogenous Auxin on the
Growth of R ice Roots under Cadm ium Stress
HAN M ing
m ing, HU Fan, WANG Ka,i ZHAO Feng
yun*
College of Life Sciences, Shandong University of Techno logy, Z ibo 255049
Abstract
[Objective] The ami w as to study the effect of different kinds o fexogenous auxin on the grow th of rice roots under cadm ium stress.
[M ethod] O ryza sa tiva L. cv Zhonghua No. 11 w as used as expermi ental materials to detect the e ffect of different kinds of exogenous auxin on
the grow th of rice roots. [ R esult] The results show ed that0. 1mm ol/L Cd treatmentcould notonly increase prmi ary, adventitious and latera l root
length but also lateral root number, w hereas the shoot grow th was inhib ited. W hen supplemented w ith different concentrations o fNAA, IAA, IBA
and 2, 4
D, the grow th o f root system varied and smi ilar change trend had been found. At the auxin concentration of10- 9 - 10- 7 mol/L in part
i
cular10- 8 mo l/L, all four kinds of auxin promoted the elongation grow th of prmi ary and adventitious roots, but inhibitionwas observedw hen aux
in was higher than 10- 7 mol/L. The decreased shoot grow th caused by Cd could not be counteracted by supplementing w ith the four kinds of
auxin