Different behaviour of indole-3-acetic acid and indole-3-butyric acid in stimulating lateral root development in rice (Oryza sativa L.)

Tory Chhun, Shin Taketa, Seiji Tsurumi, Masahiko Ichii

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The plant hormone auxin has been shown to be involved in lateral root development and application of auxins, indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA), increases the number of lateral roots in several plants. We found that the effects of two auxins on lateral root development in the indica rice (Oryza sativa L. cv. IR8) were totally different from each other depending on the application method. When the roots were incubated with an auxin solution, IAA inhibited lateral root development, while IBA was stimulatory. In contrast, when auxin was applied to the shoot, IAA promoted lateral root formation, while IBA did not. The transport of [3H]IAA from shoot to root occurred efficiently (% transported compared to supplied) but that of [3H]IBA did not, which is consistent with the stimulatory effect of IAA on lateral root production when applied to the shoot. The auxin action of IBA has been suggested to be due to its conversion to IAA. However, in rice IAA competitively inhibited the stimulatory effect of IBA on lateral root formation when they were applied to the incubation solution, suggesting that the stimulatory effect of IBA on lateral root development is not through its conversion to IAA.

Original languageEnglish
Pages (from-to)135-143
Number of pages9
JournalPlant Growth Regulation
Volume43
Issue number2
DOIs
Publication statusPublished - 2004
Externally publishedYes

Fingerprint

indole butyric acid
indole acetic acid
Indoleacetic Acids
Oryza sativa
rice
auxins
shoots
Plant Growth Regulators
Oryza
indolebutyric acid
indoleacetic acid
application methods
plant hormones

Keywords

  • Auxin
  • Indole-3-acetic acid
  • Indole-3-butyric acid
  • Lateral root
  • Oryza sativa L.
  • Rice

ASJC Scopus subject areas

  • Plant Science

Cite this

Different behaviour of indole-3-acetic acid and indole-3-butyric acid in stimulating lateral root development in rice (Oryza sativa L.). / Chhun, Tory; Taketa, Shin; Tsurumi, Seiji; Ichii, Masahiko.

In: Plant Growth Regulation, Vol. 43, No. 2, 2004, p. 135-143.

Research output: Contribution to journalArticle

@article{5fb92a48d76d4dc083c815c0e1918bf1,
title = "Different behaviour of indole-3-acetic acid and indole-3-butyric acid in stimulating lateral root development in rice (Oryza sativa L.)",
abstract = "The plant hormone auxin has been shown to be involved in lateral root development and application of auxins, indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA), increases the number of lateral roots in several plants. We found that the effects of two auxins on lateral root development in the indica rice (Oryza sativa L. cv. IR8) were totally different from each other depending on the application method. When the roots were incubated with an auxin solution, IAA inhibited lateral root development, while IBA was stimulatory. In contrast, when auxin was applied to the shoot, IAA promoted lateral root formation, while IBA did not. The transport of [3H]IAA from shoot to root occurred efficiently ({\%} transported compared to supplied) but that of [3H]IBA did not, which is consistent with the stimulatory effect of IAA on lateral root production when applied to the shoot. The auxin action of IBA has been suggested to be due to its conversion to IAA. However, in rice IAA competitively inhibited the stimulatory effect of IBA on lateral root formation when they were applied to the incubation solution, suggesting that the stimulatory effect of IBA on lateral root development is not through its conversion to IAA.",
keywords = "Auxin, Indole-3-acetic acid, Indole-3-butyric acid, Lateral root, Oryza sativa L., Rice",
author = "Tory Chhun and Shin Taketa and Seiji Tsurumi and Masahiko Ichii",
year = "2004",
doi = "10.1023/B:GROW.0000040120.37448.53",
language = "English",
volume = "43",
pages = "135--143",
journal = "Plant Growth Regulation",
issn = "0167-6903",
publisher = "Springer Netherlands",
number = "2",

}

TY - JOUR

T1 - Different behaviour of indole-3-acetic acid and indole-3-butyric acid in stimulating lateral root development in rice (Oryza sativa L.)

AU - Chhun, Tory

AU - Taketa, Shin

AU - Tsurumi, Seiji

AU - Ichii, Masahiko

PY - 2004

Y1 - 2004

N2 - The plant hormone auxin has been shown to be involved in lateral root development and application of auxins, indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA), increases the number of lateral roots in several plants. We found that the effects of two auxins on lateral root development in the indica rice (Oryza sativa L. cv. IR8) were totally different from each other depending on the application method. When the roots were incubated with an auxin solution, IAA inhibited lateral root development, while IBA was stimulatory. In contrast, when auxin was applied to the shoot, IAA promoted lateral root formation, while IBA did not. The transport of [3H]IAA from shoot to root occurred efficiently (% transported compared to supplied) but that of [3H]IBA did not, which is consistent with the stimulatory effect of IAA on lateral root production when applied to the shoot. The auxin action of IBA has been suggested to be due to its conversion to IAA. However, in rice IAA competitively inhibited the stimulatory effect of IBA on lateral root formation when they were applied to the incubation solution, suggesting that the stimulatory effect of IBA on lateral root development is not through its conversion to IAA.

AB - The plant hormone auxin has been shown to be involved in lateral root development and application of auxins, indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA), increases the number of lateral roots in several plants. We found that the effects of two auxins on lateral root development in the indica rice (Oryza sativa L. cv. IR8) were totally different from each other depending on the application method. When the roots were incubated with an auxin solution, IAA inhibited lateral root development, while IBA was stimulatory. In contrast, when auxin was applied to the shoot, IAA promoted lateral root formation, while IBA did not. The transport of [3H]IAA from shoot to root occurred efficiently (% transported compared to supplied) but that of [3H]IBA did not, which is consistent with the stimulatory effect of IAA on lateral root production when applied to the shoot. The auxin action of IBA has been suggested to be due to its conversion to IAA. However, in rice IAA competitively inhibited the stimulatory effect of IBA on lateral root formation when they were applied to the incubation solution, suggesting that the stimulatory effect of IBA on lateral root development is not through its conversion to IAA.

KW - Auxin

KW - Indole-3-acetic acid

KW - Indole-3-butyric acid

KW - Lateral root

KW - Oryza sativa L.

KW - Rice

UR - http://www.scopus.com/inward/record.url?scp=18444396302&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=18444396302&partnerID=8YFLogxK

U2 - 10.1023/B:GROW.0000040120.37448.53

DO - 10.1023/B:GROW.0000040120.37448.53

M3 - Article

AN - SCOPUS:18444396302

VL - 43

SP - 135

EP - 143

JO - Plant Growth Regulation

JF - Plant Growth Regulation

SN - 0167-6903

IS - 2

ER -