Involvement of Abscisic Acid in Mesocotyl Growth in Etiolated Seedlings of a Foxtail Millet Dwarf Mutant |
| |
Authors: | J-G Chen X Zhou |
| |
Institution: | (1) Key Laboratory of Crop Growth Regulation of Ministry of Agriculture, Department of Agronomy, Nanjing Agricultural University, Nanjing 210095, China, CN |
| |
Abstract: | Etiolated seedlings of foxtail millet (Setaria italica Beauv.) dwarf mutant CH84113 were treated with various concentrations of abscisic acid (ABA), mefluidide, mannitol, or polyethylene
glycol (PEG) 6000. It was found that these chemicals, at suitable concentrations, could increase mesocotyl length significantly,
whereas these chemicals at higher concentrations had an inhibitory effect. Endogenous levels of ABA in mesocotyl were measured
by enzyme-linked immunosorbent assay. It was found that endogenous ABA increased progressively in a chemical (ABA, mefluidide,
mannitol, or PEG 6000) concentration-dependent manner, indicating that the effects of these chemicals on mesocotyl growth
may be mediated by increased endogenous ABA levels. On the other hand, S-3307, an inhibitor of the oxidative reactions in
gibberellin (GA) biosynthesis, inhibited the elongation of mesocotyl significantly. When ABA and GA3 were applied simultaneously, the effect on mesocotyl growth was additive. These results imply that ABA and GA may control
different processes in the regulation of mesocotyl growth.
Received October 27, 1997; accepted May 11, 1998 |
| |
Keywords: | , Foxtail millet—,Mesocotyl—,Abscisic acid—,Gibberellin—,Dwarf mutant |
本文献已被 SpringerLink 等数据库收录! |
|