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The forkhead-associated domain 2 (FHA2) in Arabidopsis plays a role in plant fertility by regulating stamen development

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Abstract

The forkhead-associated (FHA) domain is involved in protein–protein interaction by recognizing a phosphothreonine epitope on target proteins. In this study, we investigated in planta functions of the Arabidopsis FHA domain 2. AtFHA2 was mainly localized in the nucleus. Arabidopsis fha2 null mutants grew normally during the vegetative stage, but had severely reduced fertility during reproductive stage. The reduced fertility was mainly caused by defective stamen filament elongation, while female flower parts of the mutants were fertile. Additionally, the mutants had fewer stamens than the wild type and the vegetative organs of the mutants, such as cotyledons and leaves, had increased ploidy. These results suggest that AtFHA2 may play a role in a signaling pathway for the control of plant organ development.

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Acknowledgments

This research was supported by the Next-Generation BioGreen 21 Program [PMBC (No. PJ009079) and SSAC (No. PJ008214); RDA] and the Mid-career Researcher Program (No. 2012047824; NRF/MEST) of Korea.

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  1. Eu-Ree Ahn

    Present address: National Forensic Service/Forensic DNA Center, 139 Jiyang-ro, Yangcheon-gu, Seoul, 158-707, Korea

Authors and Affiliations

  1. Department of Systems Biology, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Korea

    Eu-Ree Ahn, Hui-Kyung Cho & Hyun-Sook Pai

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  1. Eu-Ree Ahn
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  2. Hui-Kyung Cho
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Correspondence to Hyun-Sook Pai.

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E.-R. Ahn and H.-K. Cho contributed equally to this work.

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Ahn, ER., Cho, HK. & Pai, HS. The forkhead-associated domain 2 (FHA2) in Arabidopsis plays a role in plant fertility by regulating stamen development. Planta 237, 1015–1023 (2013). https://doi.org/10.1007/s00425-012-1815-7

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