DELAY OF GERMINATION1 requires PP2C phosphatases of the ABA signalling pathway to control seed dormancy

Guillaume Née, Katharina Kramer, Kazumi Nakabayashi, Bingjian Yuan, Yong Xiang, Emma Miatton, Iris Finkemeier and Wim J. J. Soppe ()
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Guillaume Née: Max Planck Institute for Plant Breeding Research
Katharina Kramer: Plant Proteomics, Max Planck Institute for Plant Breeding Research
Kazumi Nakabayashi: Max Planck Institute for Plant Breeding Research
Bingjian Yuan: Max Planck Institute for Plant Breeding Research
Yong Xiang: Max Planck Institute for Plant Breeding Research
Emma Miatton: Max Planck Institute for Plant Breeding Research
Iris Finkemeier: University of Münster
Wim J. J. Soppe: Max Planck Institute for Plant Breeding Research

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract The time of seed germination is a major decision point in the life of plants determining future growth and development. This timing is controlled by seed dormancy, which prevents germination under favourable conditions. The plant hormone abscisic acid (ABA) and the protein DELAY OF GERMINATION 1 (DOG1) are essential regulators of dormancy. The function of ABA in dormancy is rather well understood, but the role of DOG1 is still unknown. Here, we describe four phosphatases that interact with DOG1 in seeds. Two of them belong to clade A of type 2C protein phosphatases: ABA-HYPERSENSITIVE GERMINATION 1 (AHG1) and AHG3. These phosphatases have redundant but essential roles in the release of seed dormancy epistatic to DOG1. We propose that the ABA and DOG1 dormancy pathways converge at clade A of type 2C protein phosphatases.

Date: 2017
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DOI: 10.1038/s41467-017-00113-6

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