Sl-IAA27 gene expression is induced during arbuscular mycorrhizal symbiosis in tomato and in Medicago truncatula - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Plant Signaling and Behavior Année : 2013

Sl-IAA27 gene expression is induced during arbuscular mycorrhizal symbiosis in tomato and in Medicago truncatula

Résumé

Aux/IAA genes play a pivotal role in auxin transcriptional regulation. Their functions were mainly studied in Arabidopsis through analysis of gain-of-function mutants. In the tomato, the Solanaceae reference species, different studies on Sl-IAA down-regulated lines showed specific role for Sl-IAA genes. Our recent work revealed that the Sl-IAA 27 gene displays a distinct behavior compared with most Aux/IAA genes, being down-regulated by auxin. Interestingly, the silencing of Sl-IAA27 leads to altered chlorophyll accumulation in leaves, reduced fertilization, altered fruit development and altered root formation. Here we report that IAA27 could be a key auxin signaling gene involved in AM in tomato and also in Medicago model plant. Indeed both Sl-IAA27 and its closest homolog in Medicago truncatula, Mt-IAA27, are overexpressed in mycorrhized roots. These data are in line with the putative role of auxin in arbuscular mycorrhization.
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Dates et versions

hal-00983027 , version 1 (24-04-2014)

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Carole Bassa, Mohammad Etemadi-Shalamzari, Jean-Philippe Combier, Mondher Bouzayen, Corinne Audran-Delalande. Sl-IAA27 gene expression is induced during arbuscular mycorrhizal symbiosis in tomato and in Medicago truncatula. Plant Signaling and Behavior, 2013, vol. 8 (10), pp. e25637-1-e25637-3. ⟨10.4161/psb.25637⟩. ⟨hal-00983027⟩
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