A central role of abscisic acid in stress-regulated carbohydrate metabolism.
BACKGROUND
Abiotic stresses adversely affect plant growth and development. The hormone abscisic acid (ABA) plays a central role in the response and adaptation to environmental constraints. However, apart from the well established role of ABA in regulating gene expression programmes, little is known about its function in plant stress metabolism.


RESULTS
Using an integrative multiparallel approach of metabolome and transcriptome analyses, we studied the dynamic response of the model glyophyte Arabidopsis thaliana to ABA and high salt conditions. Our work shows that salt stress induces complex re-adjustment of carbohydrate metabolism and that ABA triggers the initial steps of carbon mobilisation.


CONCLUSIONS
These findings open new perspectives on how high salinity and ABA impact on central carbohydrate metabolism and highlight the power of iterative combinatorial approaches of non-targeted and hypothesis-driven experiments in stress biology.
Kempa
Stefan
S
Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, Vienna, Austria.
Krasensky
Julia
J
Dal Santo
Silvia
S
Kopka
Joachim
J
Jonak
Claudia
C
D000040:Abscisic Acid / Q000494:pharmacology*; D017360:Arabidopsis / Q000187:drug effects* / Q000235:genetics / Q000502:physiology*; D050260:Carbohydrate Metabolism / Q000187:drug effects*; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D017343:Genes, Plant; D054712:Salinity; D012965:Sodium Chloride / Q000494:pharmacology; D013312:Stress, Physiological / Q000187:drug effects*; D013997:Time Factors; D014158:Transcription, Genetic / Q000187:drug effects
D012965:Sodium Chloride; D000040:Abscisic Acid