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Plant Physiol. 2017 Jan;173(1):703-714. doi: 10.1104/pp.16.01626. Epub 2016 Nov 22.

Natural Variation of Molecular and Morphological Gibberellin Responses.

Nam YJ1,2,3,4, Herman D1,2,3,4, Blomme J1,2,3,4, Chae E1,2,3,4, Kojima M1,2,3,4, Coppens F1,2,3,4, Storme V1,2,3,4, Van Daele T1,2,3,4, Dhondt S1,2,3,4, Sakakibara H1,2,3,4, Weigel D1,2,3,4, Inzé D5,6,7,8, Gonzalez N1,2,3,4.

Author information

1
Department of Plant Systems Biology, VIB, B-9052 Gent, Belgium (Y.J.N., D.H., F.C., V.S., T.V.D., S.D., D.I., N.G.).
2
Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium (Y.J.N., D.H., F.C., V.S., T.V.D., S.D., D.I., N.G.).
3
Department of Molecular Biology, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany (E.C., D.W.); and.
4
RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama, Kanagawa 230-0045, Japan (M.K., H.S.).
5
Department of Plant Systems Biology, VIB, B-9052 Gent, Belgium (Y.J.N., D.H., F.C., V.S., T.V.D., S.D., D.I., N.G.); dirk.inze@psb.vib-ugent.be.
6
Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium (Y.J.N., D.H., F.C., V.S., T.V.D., S.D., D.I., N.G.); dirk.inze@psb.vib-ugent.be.
7
Department of Molecular Biology, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany (E.C., D.W.); and dirk.inze@psb.vib-ugent.be.
8
RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama, Kanagawa 230-0045, Japan (M.K., H.S.) dirk.inze@psb.vib-ugent.be.

Abstract

Although phytohormones such as gibberellins are essential for many conserved aspects of plant physiology and development, plants vary greatly in their responses to these regulatory compounds. Here, we use genetic perturbation of endogenous gibberellin levels to probe the extent of intraspecific variation in gibberellin responses in natural accessions of Arabidopsis (Arabidopsis thaliana). We find that these accessions vary greatly in their ability to buffer the effects of overexpression of GA20ox1, encoding a rate-limiting enzyme for gibberellin biosynthesis, with substantial differences in bioactive gibberellin concentrations as well as transcriptomes and growth trajectories. These findings demonstrate a surprising level of flexibility in the wiring of regulatory networks underlying hormone metabolism and signaling.

PMID:
27879393
PMCID:
PMC5210761
DOI:
10.1104/pp.16.01626
[Indexed for MEDLINE]
Free PMC Article

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