Effects of low O2 root stress on ethylene biosynthesis in tomato plants (Lycopersicon esculentum Mill cv Heinz 1350)

Low O2 conditions were obtained by flowing N2 through the solution in which the tomato plants (Lycopersicon esculentum Mill cv Heinz 1350) were growing. Time course experiments revealed that low O2 treatments stimulated 1-aminocyclopropane-1-carboxylate (ACC) synthase production in the roots and lea...

Full description

Saved in:
Bibliographic Details
Published in:Plant physiology (Bethesda) 1992-01, Vol.98 (1), p.97-100
Main Authors: Wang, T.W. (Pennsylvania State University, University Park, PA), Arteca, R.N
Format: Article
Language:English
Subjects:
ACTIVIDAD ENZIMATICA
ACTIVITE ENZYMATIQUE
Agronomy. Soil science and plant productions
BESOIN EN OXYGENE
Biological and medical sciences
Biosynthesis
Cobalt
ETHYLENE
Ethylene production
ETILENO
Fundamental and applied biological sciences. Psychology
Growth regulators
INHIBICION
INHIBITION
Leaves
LIGASAS
LIGASE
LYCOPERSICON ESCULENTUM
Metabolism
Petioles
Plant physiology and development
Plant roots
Plants
PRODUCCION VEGETAL
PRODUCTION VEGETALE
RACINE
RAICES
REQUERIMIENTO DE OXIGENO
Rice
Seedlings
Seeds
SUBSTANCE DE CROISSANCE VEGETALE
SUSTANCIAS DE CRECIMIENTO VEGETAL
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Low O2 conditions were obtained by flowing N2 through the solution in which the tomato plants (Lycopersicon esculentum Mill cv Heinz 1350) were growing. Time course experiments revealed that low O2 treatments stimulated 1-aminocyclopropane-1-carboxylate (ACC) synthase production in the roots and leaves. After the initiation of low O2 conditions, ACC synthase activity and ACC content in the roots increased and reached a peak after 12 and 20 hours, respectively. The conversion of ACC to ethylene in the roots was inhibited by low levels of O2, and ACC was apparently transported to the leaves where it was converted to ethylene. ACC synthase activity in the leaves was also stimulated by low O2 treatment to the roots, reaching a peak after 24 hours. ACC synthase levels were enhanced by cobalt chloride and aminooxyacetic acid (AOA), although they inhibited ethylene production. Cobalt chloride enhanced ACC synthase only in combination with low O2 conditions in the roots. Under aeration, AOA stimulated ACC synthase activity in both the roots and leaves. However, in combination with low O2 conditions, AOA caused a stimulation in ACC synthase activity in the leaves and no effect in the roots
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.98.1.97