Specification of female germline by microRNA orchestrated auxin signaling in Arabidopsis
Huang J, Zhao L, Malik S, Gentile BR, Xiong V, Arazi T, Owen HA, Friml J, Zhao D. 2022. Specification of female germline by microRNA orchestrated auxin signaling in Arabidopsis. Nature Communications. 13, 6960.
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Huang, Jian;
Zhao, Lei;
Malik, Shikha;
Gentile, Benjamin R.;
Xiong, Va;
Arazi, Tzahi;
Owen, Heather A.;
Friml, JiríISTA ;
Zhao, Dazhong
Department
Abstract
Germline determination is essential for species survival and evolution in multicellular organisms. In most flowering plants, formation of the female germline is initiated with specification of one megaspore mother cell (MMC) in each ovule; however, the molecular mechanism underlying this key event remains unclear. Here we report that spatially restricted auxin signaling promotes MMC fate in Arabidopsis. Our results show that the microRNA160 (miR160) targeted gene ARF17 (AUXIN RESPONSE FACTOR17) is required for promoting MMC specification by genetically interacting with the SPL/NZZ (SPOROCYTELESS/NOZZLE) gene. Alterations of auxin signaling cause formation of supernumerary MMCs in an ARF17- and SPL/NZZ-dependent manner. Furthermore, miR160 and ARF17 are indispensable for attaining a normal auxin maximum at the ovule apex via modulating the expression domain of PIN1 (PIN-FORMED1) auxin transporter. Our findings elucidate the mechanism by which auxin signaling promotes the acquisition of female germline cell fate in plants.
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Publishing Year
Date Published
2022-11-15
Journal Title
Nature Communications
Acknowledgement
We thank A. Cheung,W. Lukowitz, V.Walbot, D.Weijers, and R. Yadegari for critically reading the manuscript; E. Xiong and G. Zhang for preparing some experiments, T. Schuck, J. Gonnering, and P. Engevold for plant care, the Arabidopsis Biological Resource Center (ABRC) for ARF10,ARF16, ARF17, EMS1,MIR160a BAC clones and cDNAs, the SALK_090804 seed, T. Nakagawa for pGBW vectors, Y. Zhao for the YUC1 cDNA, Q. Chen for the pHEE401E vector, R. Yadegari for pAT5G01860::n1GFP, pAT5G45980:n1GFP, pAT5G50490::n1GFP, pAT5G56200:n1GFP vectors, and D.Weijers for the pGreenII KAN SV40-3×GFP and R2D2 vectors, W. Yang for the splmutant, Y. Qin for the pKNU::KNU-VENUS vector and seed, G. Tang for the STTM160/160-48 vector, and L. Colombo for pPIN1::PIN1-GFP spl and pin1-5 seeds. This work was supported by the US National Science Foundation (NSF)-Israel Binational Science Foundation (BSF) research grant to D.Z. (IOS-1322796) and T.A. (2012756). D.Z. also
gratefully acknowledges supports of the Shaw Scientist Award from the Greater Milwaukee Foundation, USDA National Institute of Food and Agriculture (NIFA, 2022-67013-36294), the UWM Discovery and Innovation Grant, the Bradley Catalyst Award from the UWM Research
Foundation, and WiSys and UW System Applied Research Funding Programs.
Volume
13
Article Number
6960
ISSN
IST-REx-ID
Cite this
Huang J, Zhao L, Malik S, et al. Specification of female germline by microRNA orchestrated auxin signaling in Arabidopsis. Nature Communications. 2022;13. doi:10.1038/s41467-022-34723-6
Huang, J., Zhao, L., Malik, S., Gentile, B. R., Xiong, V., Arazi, T., … Zhao, D. (2022). Specification of female germline by microRNA orchestrated auxin signaling in Arabidopsis. Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-022-34723-6
Huang, Jian, Lei Zhao, Shikha Malik, Benjamin R. Gentile, Va Xiong, Tzahi Arazi, Heather A. Owen, Jiří Friml, and Dazhong Zhao. “Specification of Female Germline by MicroRNA Orchestrated Auxin Signaling in Arabidopsis.” Nature Communications. Springer Nature, 2022. https://doi.org/10.1038/s41467-022-34723-6.
J. Huang et al., “Specification of female germline by microRNA orchestrated auxin signaling in Arabidopsis,” Nature Communications, vol. 13. Springer Nature, 2022.
Huang J, Zhao L, Malik S, Gentile BR, Xiong V, Arazi T, Owen HA, Friml J, Zhao D. 2022. Specification of female germline by microRNA orchestrated auxin signaling in Arabidopsis. Nature Communications. 13, 6960.
Huang, Jian, et al. “Specification of Female Germline by MicroRNA Orchestrated Auxin Signaling in Arabidopsis.” Nature Communications, vol. 13, 6960, Springer Nature, 2022, doi:10.1038/s41467-022-34723-6.
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