TY - JOUR
T1 - Lateral root formation in rice (Oryza Sativa L.)
T2 - Differential effects of indole-3-acetic acid and indole-3-butyric acid
AU - Wang, Shucai
AU - Taketa, Shin
AU - Ichii, Masahiko
AU - Xu, Langlai
AU - Xia, Kai
AU - Zhou, Xie
N1 - Funding Information:
We thank Mr. C. Tory (Kagawa University) for providing rice seeds, and Prof. G. Hagen (University of Missouri-Columbia) and Dr. J.G. Chen (University of North Carolina) for critical reading of the manuscript. This work was supported by the National Natural Science Foundation of China (No.39970437) and Youth Foundation of NAU.
PY - 2003/9
Y1 - 2003/9
N2 - Comparative effects of indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) on lateral root (LR) formation were studied using 2-day-old seedlings of IR8 rice (Oryza sativa L.). Results showed that IBA at all concentrations (0.8-500 nmol/L) increased the number of LRs in the seminal root. However exogenous IAA, failed to increase the number of LRs. On the other hand, both IBA and IAA caused inhibition of seminal root elongation and promotion of LR elongation, but IAA can only reach to the same degree of that of IBA at a more than 20-fold concentration. Exogenous IBA had no effect on endogenous IAA content. We conclude from the results that IBA could act directly as a distinct auxin, promoting LR formation in rice, and that the signal transduction pathway for IBA is at least partially different from that for IAA.
AB - Comparative effects of indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) on lateral root (LR) formation were studied using 2-day-old seedlings of IR8 rice (Oryza sativa L.). Results showed that IBA at all concentrations (0.8-500 nmol/L) increased the number of LRs in the seminal root. However exogenous IAA, failed to increase the number of LRs. On the other hand, both IBA and IAA caused inhibition of seminal root elongation and promotion of LR elongation, but IAA can only reach to the same degree of that of IBA at a more than 20-fold concentration. Exogenous IBA had no effect on endogenous IAA content. We conclude from the results that IBA could act directly as a distinct auxin, promoting LR formation in rice, and that the signal transduction pathway for IBA is at least partially different from that for IAA.
KW - Indole-3-acetic acid
KW - Indole-3-butyric acid
KW - Lateral root formation
KW - Oryza sativa L.
KW - Rice
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U2 - 10.1023/A:1027384528993
DO - 10.1023/A:1027384528993
M3 - Article
AN - SCOPUS:0344153264
SN - 0167-6903
VL - 41
SP - 41
EP - 47
JO - Plant Growth Regulation
JF - Plant Growth Regulation
IS - 1
ER -