Journal
FEBS LETTERS
Volume 587, Issue 18, Pages 3076-3082Publisher
WILEY
DOI: 10.1016/j.febslet.2013.07.045
Keywords
Triacylglycerol; DGAT1; ABI4; ABI5; Synergistic effect
Funding
- National Natural Science Foundation [31170231, 31272023, 90817001, 31101421]
- National Key Basic Science '973' Program [2012CB114006]
- State '863' High Technology R & D Program of the Chinese Government [2006AA06Z341]
- State Key Laboratory of Protein and Plant Gene Research
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Triacylglycerol (TAG) accumulation is essential for seed maturation in plants. Diacylglycerol acyltransferase 1 (DGAT1) is the rate-limiting enzyme in TAG biosynthesis. In this study, we show that TAG accumulation in Arabidopsis seedlings is correlated with environmental stress, and both ABI4 and ABI5 play important roles in regulating DGAT1 expression. Tobacco transient assays revealed the synergistic effect of ABI4 with ABI5 in regulating DGAT1 expression. Taken together, our findings indicate ABI5 is an important accessory factor with ABI4 in the activation of DGAT1 in Arabidopsis seedlings under stress. (C) 2013 Federation of European Biochemical Societies. Published by Elsevier B. V. All rights reserved.
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