Ascorbate oxidase the unexpected involvement of a 'wasteful enzyme' in the symbioses with nitrogen-fixing bacteria and arbuscular mycorrhizal fungi

Ascorbate oxidase : the unexpected involvement of a 'wasteful enzyme' in the symbioses with nitrogen-fixing bacteria and arbuscular mycorrhizal fungi

Copyright © 2012 Elsevier Masson SAS. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Plant physiology and biochemistry : PPB. - 1991. - 59(2012) vom: 30. Okt., Seite 71-9
1. Verfasser: Balestrini, Raffaella (VerfasserIn)
Weitere Verfasser: Ott, Thomas, Güther, Mike, Bonfante, Paola, Udvardi, Michael K, De Tullio, Mario C
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2012
Zugriff auf das übergeordnete Werk:Plant physiology and biochemistry : PPB
Schlagworte:Journal Article Ascorbate Oxidase EC 1.10.3.3 Nitrogen N762921K75 Ascorbic Acid PQ6CK8PD0R Oxygen S88TT14065
Beschreibung
Zusammenfassung:Copyright © 2012 Elsevier Masson SAS. All rights reserved.
Ascorbate oxidase (AO, EC 1.10.3.3) catalyzes the oxidation of ascorbate (AsA) to yield water. AO over-expressing plants are prone to ozone and salt stresses, whereas lower expression apparently confers resistance to unfavorable environmental conditions. Previous studies have suggested a role for AO as a regulator of oxygen content in photosynthetic tissues. For the first time we show here that the expression of a Lotus japonicus AO gene is induced in the symbiotic interaction with both nitrogen-fixing bacteria and arbuscular mycorrhizal (AM) fungi. In this framework, high AO expression is viewed as a possible strategy to down-regulate oxygen diffusion in root nodules, and a component of AM symbiosis. A general model of AO function in plants is discussed
Beschreibung:Date Completed 26.11.2013
Date Revised 30.09.2020
published: Print-Electronic
Citation Status MEDLINE
ISSN:1873-2690
DOI:10.1016/j.plaphy.2012.07.006