Abstract
To increase our knowledge of anaphase promoting complex (APC/C) function during plant development, we characterized an Arabidopsis thaliana T-DNA-insertion line where the T-DNA fell within the 5′ regulatory region of the APC10 gene. The insert disrupted endogenous expression, resulting in overexpression of APC10 mRNA from the T-DNA- internal CaMV 35S promoter, and increased APC10 protein. Overexpression of APC10 produced phenotypes resembling those of known auxin and ethylene mutants, and increased expression of two tested auxin-regulated genes, small auxin up RNA (SAUR) 15 and SAUR24. Taken together, our data suggests that elevated APC10 likely mimics auxin and ethylene sensitive phenotypes, expanding our understanding of proteolytic processes in hormone regulation of plant development.
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Abbreviations
- APC/C:
-
Anaphase promoting complex/cyclosome
- apc10 OE:
-
APC10 overexpressor
- CHS:
-
Chalcone synthase
- EIN3:
-
Ethylene-insensitive3
- ERF1 :
-
Ethylene response factor1
- erh3 :
-
Ectopic root hair3 mutant
- NAA:
-
α-Naphthaleneacetic acid
- SAUR :
-
Small auxin up RNA
- SCF:
-
Skp1-Cullin-F-box
- tt4/chs :
-
Transparent testa4/chalcone synthase mutant
- WT:
-
Wild-type
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Acknowledgments
We are grateful to Lindsay Yaworsky for initial observations, Rory Degenhardt, Sarah Caldwell and Joyce Wilson for technical assistance. This work was supported by Natural Sciences and Engineering Research Council (NSERC) of Canada Discovery grants to P.C.B–S. and G.R.G., Canadian Foundation for Innovation (CFI) to T.A.A.H. and Canadian Institutes for Health Research (CIHR)/Saskatchewan Health Research Foundation (SHRF) to D.L.L.
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Lindsay, D.L., Bonham-Smith, P.C., Postnikoff, S. et al. A role for the anaphase promoting complex in hormone regulation. Planta 233, 1223–1235 (2011). https://doi.org/10.1007/s00425-011-1374-3
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DOI: https://doi.org/10.1007/s00425-011-1374-3