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

被引：42

作者：

Tsai, FY ^{[1
]}

Lin, CC ^{[1
]}

Kao, CH ^{[1
]}

机构：

[1] NATL TAIWAN UNIV,DEPT AGRON,TAIPEI,TAIWAN

来源：

PLANT GROWTH REGULATION | 1997年 / 21卷 / 01期

关键词：

abscisic acid; growth; methyl jasmonate; Oryza sativa; LOW WATER POTENTIALS; PEROXIDASE-ACTIVITY; PLANT-GROWTH; PHYSIOLOGY; ELONGATION; ROOTS;

D O I：

10.1023/A:1005761804191

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

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 mu M, respectively. Growth inhibition by ABA is reversible, whereas that by MJ is irreversible. GA(3) was found to be more effective in reversing inhibition of shoot growth by ABA than by MJ. KCI 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 mu M) was less effective in inhibiting root growth than ABA (9 mu M), MJ was found to increase more cell wall-bound peroxidase activity in roots than ABA.

引用

页码：37 / 42

页数：6

共 19 条

[11] INCREASED ENDOGENOUS ABSCISIC-ACID MAINTAINS PRIMARY ROOT-GROWTH AND INHIBITS SHOOT GROWTH OF MAIZE SEEDLINGS AT LOW WATER POTENTIALS [J].