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γ ‐Aminobutyric acid transaminase deficiency impairs central carbon metabolism and leads to cell wall defects during salt stress in A rabidopsis roots
Author(s) -
RENAULT HUGUES,
EL AMRANI ABDELHAK,
BERGER ADELINE,
MOUILLE GRÉGORY,
SOUBIGOUTACONNAT LUDIVINE,
BOUCHEREAU ALAIN,
DELEU CAROLE
Publication year - 2013
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.12033
Subject(s) - gaba transaminase , catabolism , metabolism , biochemistry , cell wall , aminobutyric acid , mutant , chemistry , transaminase , gamma aminobutyric acid , biology , enzyme , gene , glutamate decarboxylase , receptor
GABA ( γ ‐aminobutyric acid) is a ubiquitous non‐protein amino acid that commonly accumulates in plants in response to stressful conditions. However, functions of GABA in plants remain still unclear. In this study, we provide metabolic and transcriptional evidences that GABA metabolism is involved in central carbon metabolism regulation upon salt stress in roots. Furthermore, we show that GABA transaminase deficiency results in deleterious consequences for root development and cell wall elaboration during salt stress. Our work thus highlights the critical function of GABA metabolism in root metabolic acclimation to saline conditions.