Plant Growth Regulation

, Volume 21, Issue 1, pp 37–42

A comparative study of the effects of abscisic acid and methyl jasmonate on seedling growth of rice

  • Fei-Yi Tsai
  • Chuan Chi Lin
  • Ching Huei Kao
Article

DOI: 10.1023/A:1005761804191

Cite this article as:
Tsai, FY., Lin, C.C. & Kao, C.H. Plant Growth Regulation (1997) 21: 37. doi:10.1023/A:1005761804191

Abstract

The effects of abscisic acid (ABA) and methyl jasmonate (MJ) on growth of rice seedlings were compared. The lowest tested concentration of ABA and MJ that inhibited seedling growth was found to be 4.5 and 0.9 µM, respectively. Growth inhibition by ABA is reversible, whereas that by MJ is irreversible. GA3 was found to be more effective in reversing inhibition of shoot growth by ABA than by MJ. KCl partially relieved MJ-inhibited, but not ABA-inhibited, growth of rice seedlings. The beneficial effect of K+ on growth of rice seedlings in MJ medium could not be replaced by Li+, Na+ or Cs+. MJ treatment caused a marked release of K+ into the medium. In order to understand whether cell wall-bound peroxidase activity was inversely related to rice seedling growth, effects of ABA and MJ on cell wall-bound peroxidase activity were also examined. Results indicated that both ABA and MJ increased cell wall-bound peroxidase activity in roots and shoots of rice seedlings. Although MJ (4.5 µM) was less effective in inhibiting root growth than ABA (9 µM), MJ was found to increase more cell wall-bound peroxidase activity in roots than ABA.

abscisic acidgrowthmethyl jasmonateOryza sativa

Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Fei-Yi Tsai
    • 1
  • Chuan Chi Lin
    • 1
  • Ching Huei Kao
    • 1
  1. 1.Department of AgronomyNational Taiwan UniversityTaipeiTaiwan, Republic of China