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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Proteome analysis of apical and basal regions of poplar stems under gravitropic stimulation
Physiologia Plantarum, Volume 136, No. 2, Year 2009
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Description
Gravity is a constant force guiding the direction of plant growth. In young poplar stem, reorientation of the apical region is mainly obtained by differential growth of elongating primary tissues. At the base, where elongation is achieved but where the cambium is active, reorientation is due to asymmetrical formation of reaction wood. After 45 min of gravistimulation, the stem showed no reorientation, but 1 week later, reaction wood was observed at the base of the stem. To determine the molecular mechanisms taking place at the top and base of the stem, after 45 min or 1 week of inclination, the changes induced in protein accumulation were studied by two-dimensional polyacrylamide gel electrophoresis and quantitatively analyzed using image analysis software. Around 300 protein spots were reproducibly detected and analyzed. Forty percent of these proteins showed significant changes after inclination. Mass spectrometry analysis of 135 spots led to the identification of 60 proteins involved in a wide range of activities and metabolisms. Very different patterns of protein expression were obtained according to conditions tested, highlighting the complexity of gravitropic responses. Our results suggest that primary and secondary tissues present specific mechanisms to sense reorientation and to respond to inclination. Some selected proteins are discussed. © Copyright Physiologia Plantarum 2009.
Authors & Co-Authors
Azri, Wassim
France, Clermont-ferrand
Université Clermont Auvergne
Tunisia, Tunis
Laboratoire de Biologie et Physiologie Végétales
Chambon, Christophe
France, Saint-genes-champanelle
Qualité Des Produits Animaux Quapa
Herbette, Stéphane D.Sign©phane
France, Clermont-ferrand
Université Clermont Auvergne
Brunel, Nicole
France, Clermont-ferrand
Université Clermont Auvergne
Coutand, Catherine
France, Clermont-ferrand
Physique et Physiologie Intégratives de L'arbre en Environnement Fluctuant Piaf
Leplé, Jean Charles
France, Orleans
Biologie Intégrée Pour la Valorisation de la Diversité Des Arbres et de la Forêt Biofora
Ben Rejeb, Ichrak
Tunisia, Tunis
Laboratoire de Biologie et Physiologie Végétales
Ammar, Saïda
Tunisia, Tunis
Laboratoire de Biologie et Physiologie Végétales
Julien, Jean Louis J.
France, Clermont-ferrand
Université Clermont Auvergne
Roeckel-Drevet, Patricia
France, Clermont-ferrand
Université Clermont Auvergne
Statistics
Citations: 10
Authors: 10
Affiliations: 5
Identifiers
Doi:
10.1111/j.1399-3054.2009.01230.x
ISSN:
00319317
e-ISSN:
13993054