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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
A diminution in ascorbate oxidase activity affects carbon allocation and improves yield in tomato under water deficit
Plant, Cell and Environment, Volume 36, No. 1, Year 2013
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Description
The regulation of carbon allocation between photosynthetic source leaves and sink tissues in response to stress is an important factor controlling plant yield. Ascorbate oxidase is an apoplastic enzyme, which controls the redox state of the apoplastic ascorbate pool. RNA interference was used to decrease ascorbate oxidase activity in tomato (Solanum lycopersicum L.). Fruit yield was increased in these lines under three conditions where assimilate became limiting for wild-type plants: when fruit trusses were left unpruned, when leaves were removed or when water supply was limited. Several alterations in the transgenic lines could contribute to the improved yield and favour transport of assimilate from leaves to fruits in the ascorbate oxidase lines. Ascorbate oxidase plants showed increases in stomatal conductance and leaf and fruit sugar content, as well as an altered apoplastic hexose:sucrose ratio. Modifications in gene expression, enzyme activity and the fruit metabolome were coherent with the notion of the ascorbate oxidase RNAi lines showing altered sink strength. Ascorbate oxidase may therefore be a target for strategies aimed at improving water productivity in crop species. Ascorbate oxidase is an apoplastic enzyme which controls the redox state of the apoplastic ascorbate pool. RNA interference was used to decrease ascorbate oxidase activity in tomato (Solanum lycopersicum L.). Fruit yield was increased in these lines under conditions where assimilate became limiting for wild type plants. Several alterations in the transgenic lines could contribute to the improved yield and favour transport of assimilate from leaves to fruits in the ascorbate oxidase lines. © 2012 Blackwell Publishing Ltd.
Authors & Co-Authors
Garchery, Cecile
France, Montfavet
Génétique et Amélioration Des Fruits et Légumes Gafl
Gest, Noé
France, Montfavet
Génétique et Amélioration Des Fruits et Légumes Gafl
Do, Phuc T.
Germany, Potsdam
Max Planck Institute of Molecular Plant Physiology
Alhagdow, Moftah
France, Villenave-d'ornon
Biologie du Fruit et Pathologie
France, Bordeaux
Université de Bordeaux
Libya, Tripoli
University of Tripoli
Baldet, Pierre
France, Villenave-d'ornon
Biologie du Fruit et Pathologie
France, Bordeaux
Université de Bordeaux
Menard, Guillaume
France, Villenave-d'ornon
Biologie du Fruit et Pathologie
France, Bordeaux
Université de Bordeaux
Rothan, Christophe
France, Villenave-d'ornon
Biologie du Fruit et Pathologie
France, Bordeaux
Université de Bordeaux
Massot, Capucine
France, Avignon
Unité de Recherche Plantes et Systèmes de Culture Horticoles
Gautier, Hélène
France, Avignon
Unité de Recherche Plantes et Systèmes de Culture Horticoles
Aarrouf, Jawad
France, Avignon
Uapv
Fernie, Alisdair Robert
Germany, Potsdam
Max Planck Institute of Molecular Plant Physiology
Stevens, Rebecca G.
France, Montfavet
Génétique et Amélioration Des Fruits et Légumes Gafl
Statistics
Citations: 78
Authors: 12
Affiliations: 7
Identifiers
Doi:
10.1111/j.1365-3040.2012.02564.x
ISSN:
01407791
Research Areas
Environmental
Genetics And Genomics