gamma-aminobutyric acid promotes stem elongation in Stellaria longipes: the role of ethylene

Authors
Kathiresan, A Miranda, J Chinnappa, CC Reid, DM
Citation
A. Kathiresan et al., gamma-aminobutyric acid promotes stem elongation in Stellaria longipes: the role of ethylene, PLANT GR R, 26(2), 1998, pp. 131-137
Citations number
34
Categorie Soggetti
Plant Sciences
Journal title
PLANT GROWTH REGULATION
ISSN journal
01676903 → ACNP
Volume
26
Issue
2
Year of publication
1998
Pages
131 - 137
Database
ISI
SICI code
0167-6903(199811)26:2<131:GAPSEI>2.0.ZU;2-P
Abstract
The response of stems to GABA was biphasic in that lower concentrations of GABA (upto 500 mu M) promoted stem elongation, but higher concentrations of GABA inhibited stem elongation. An optimal GABA concentration of 250 mu M produced maximum stem elongation. The higher GABA concentrations also stimu lated 1-aminocyclopropane-1-carboxylate (ACC) synthase (EC 4.4.1.14) mRNA a ccumulation and ethylene production. Results suggest that the inhibitory ef fect of higher GABA concentrations on stem elongation is partly mediated by ethylene.