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Article

RNA-Binding Protein MAC5A Is Required for Gibberellin-Regulated Stamen Development

by
Hua Liu
1,*,†,
Hongna Shang
1,†,
Huan Yang
1,†,
Wenjie Liu
2,
Daisuke Tsugama
3,
Ken-Ichi Nonomura
4,5,
Aimin Zhou
6,
Wenwu Wu
1,
Tetsuo Takano
3 and
Shenkui Liu
1,*
1
State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
2
College of Agriculture, Northeast Agricultural University, Harbin 150030, China
3
Asian Natural Environmental Science Center (ANESC), The University of Tokyo, Tokyo 188-0002, Japan
4
Plant Cytogenetics Laboratory, National Institute of Genetics (NIG), Shizuoka 411-0801, Japan
5
Department of Life Science, Graduate University for Advanced Studies/Sokendai, Shizuoka 411-0801, Japan
6
College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
*
Authors to whom correspondence should be addressed.
†
These authors contribute equally to this work.
Int. J. Mol. Sci. 2022, 23(4), 2009; https://doi.org/10.3390/ijms23042009
Submission received: 25 January 2022 / Revised: 9 February 2022 / Accepted: 9 February 2022 / Published: 11 February 2022
(This article belongs to the Section Macromolecules)
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Abstract

The development of floral organs is coordinated by an elaborate network of homeotic genes, and gibberellin (GA) signaling is involved in floral organ development; however, the underlying molecular mechanisms remain elusive. In the present study, we found that MOS4-ASSOCIATED COMPLEX 5A (MAC5A), which is a protein containing an RNA-binding motif, was involved in the development of sepals, petals, and stamens; either the loss or gain of MAC5A function resulted in stamen malformation and a reduced seed set. The exogenous application of GA considerably exacerbated the defects in mac5a null mutants, including fewer stamens and male sterility. MAC5A was predominantly expressed in pollen grains and stamens, and overexpression of MAC5A affected the expression of homeotic genes such as APETALA1 (AP1), AP2, and AGAMOUS (AG). MAC5A may interact with RABBIT EARS (RBE), a repressor of AG expression in Arabidopsis flowers. The petal defect in rbe null mutants was at least partly rescued in mac5a rbe double mutants. These findings suggest that MAC5A is a novel factor that is required for the normal development of stamens and depends on the GA signaling pathway.
Keywords: Arabidopsis thaliana; floral organ development; gibberellin; stamen; male sterility; MAC5A Arabidopsis thaliana; floral organ development; gibberellin; stamen; male sterility; MAC5A

Share and Cite

MDPI and ACS Style

Liu, H.; Shang, H.; Yang, H.; Liu, W.; Tsugama, D.; Nonomura, K.-I.; Zhou, A.; Wu, W.; Takano, T.; Liu, S. RNA-Binding Protein MAC5A Is Required for Gibberellin-Regulated Stamen Development. Int. J. Mol. Sci. 2022, 23, 2009. https://doi.org/10.3390/ijms23042009

AMA Style

Liu H, Shang H, Yang H, Liu W, Tsugama D, Nonomura K-I, Zhou A, Wu W, Takano T, Liu S. RNA-Binding Protein MAC5A Is Required for Gibberellin-Regulated Stamen Development. International Journal of Molecular Sciences. 2022; 23(4):2009. https://doi.org/10.3390/ijms23042009

Chicago/Turabian Style

Liu, Hua, Hongna Shang, Huan Yang, Wenjie Liu, Daisuke Tsugama, Ken-Ichi Nonomura, Aimin Zhou, Wenwu Wu, Tetsuo Takano, and Shenkui Liu. 2022. "RNA-Binding Protein MAC5A Is Required for Gibberellin-Regulated Stamen Development" International Journal of Molecular Sciences 23, no. 4: 2009. https://doi.org/10.3390/ijms23042009

APA Style

Liu, H., Shang, H., Yang, H., Liu, W., Tsugama, D., Nonomura, K.-I., Zhou, A., Wu, W., Takano, T., & Liu, S. (2022). RNA-Binding Protein MAC5A Is Required for Gibberellin-Regulated Stamen Development. International Journal of Molecular Sciences, 23(4), 2009. https://doi.org/10.3390/ijms23042009

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