Hostname: page-component-77f85d65b8-g4pgd Total loading time: 0 Render date: 2026-04-17T16:50:50.188Z Has data issue: false hasContentIssue false

1-aminocyclopropane-1-carboxylate oxidase from embryonic axes of germinating chick-pea (Cicer arietinum L.) seeds: cellular immunolocalization and alterations in its expression by indole-3-acetic acid, abscisic acid and spermine

Published online by Cambridge University Press:  22 February 2007

María Del Carmen Gómez-Jiménez
Affiliation:
Departamento de Biología Vegetal, Laboratorio de Fisiología Vegetal, Facultad de Ciencias, Universidad de Granada, 18001-Granada, Spain
Enrique García-Olivares
Affiliation:
Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Universidad de Granada, 18001-Granada, Spain
Angel J. Matilla*
Affiliation:
Departmento de Fisiología Vegetal, Facultad de Farmacia, Universidad de Santiago de Compostela, 15706-Santiago de compostela, A Coruña, Spain
*
*Correspondence Fax: +34-981-593-054 Email: bvmatilla@usc.es

Abstract

A recombinant protein (approximately 38 kDa by SDS/PAGE), induced by expression in Escherichia coli of a cDNA encoding a 1-aminocyclopropane-1-carboxylate oxidase (ACO) isolated from embryonic axes of Cicer arietinum, was recognized by an antibody raised against an apple ACO. A monoclonal antibody, obtained from recombinant ACO of chick-peas, was used for immunolocalization experiments in the embryonic axes of chick-pea seeds. The results indicate that most of the ACO was present in the apoplast of the cell wall. No evidence of this protein in the vacuole was detected. During germination of C. arietinum seeds, the production of ethylene was induced in the embryonic axis; its highest value was reached when radicle emergence occurred. At this moment there was an accumulation of 1-aminocyclopropane-1-carboxylate (ACC), transcription of ACO mRNA, as well as maximal ACO activity. In the post-germinative period the activity of the last step of ethylene biosynthesis decreased. This decrease was eliminated by indole-3-acetic acid (IAA), which caused significant transcription of ACO mRNA. It is suggested that gene expression of ACO may be induced by auxins and spermine (Spm) and inhibited by abscisic acid (ABA).

Information

Type
Research Article
Copyright
Copyright © Cambridge University Press 2001

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable