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The ARGONAUTE10 gene modulates shoot apical meristem maintenance and establishment of leaf polarity by repressing miR165/166 in Arabidopsis
Open accessAbstract
Summary: The shoot apical meristem (SAM) of angiosperms comprises a group of undifferentiated cells which divide to maintain the meristem and also give rise to all the above‐ground structures of the plant. Previous studies revealed that the Arabidopsis ARGONAUTE10 [AGO10, also called PINHEAD (PNH) or ZWILLE (ZLL)] gene is one of the critical SAM regulators, but the mechanism by which AGO10 modulates the SAM is unknown. In the present study we show that AGO10 genetically represses microRNA165/166 (miR165/166) for SAM maintenance as well as establishment of leaf adaxial–abaxial polarity. Levels of miR165/166 in leaves and embryonic SAMs of pnh/zll/ago10 mutants are abnormally elevated, leading to a reduction in the quantity of homeodomain‐leucine zipper (HD‐ZIP) III gene transcripts, the targets of miR165/166. This reduction is the primary cause of pnh/zll SAM and leaf defects, because the aberrant pnh/zll phenotypes were partially rescued by either increasing levels of HD‐ZIP III transcripts or decreasing levels of miR165/166 in the SAM and leaf. Furthermore, plants with an abnormal apex were more frequent among pnh/zll rdr6 and pnh/zll ago7 double mutants and increased levels of miR165/166 were detected in rdr6 apices. These results indicate that AGO10 and RDR6/AGO7 may act in parallel in modulating accumulation of miR165/166 for normal plant development.
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Cites
Radial Patterning of Arabidopsis Shoots by Class III HD-ZIP and KANADI Genes
Emery, J. F., Floyd, S. K., Alvarez, J., Eshed, Y., Hawker, N. P., Izhaki, A., Baum, S. F., & Bowman, J. L. (2003) · Current Biology · doi:10.1016/j.cub.2003.09.035 · Cited by 1,143
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The expanding world of small RNAs in plants
Borges, F., & Martienssen, R. A. (2015) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm4085 · Cited by 1,016
Zhu, H., Hu, F., Wang, R., Zhou, X., Sze, S.-H., Liou, L. W., Barefoot, A., Dickman, M., & Zhang, X. (2011) · Cell · doi:10.1016/j.cell.2011.03.024 · Cited by 501
The ‘how’ and ‘where’ of plant micro RNA s
Yu, Y., Jia, T., & Chen, X. (2017) · New Phytologist · doi:10.1111/nph.14834 · Cited by 459
Plant Noncoding RNAs: Hidden Players in Development and Stress Responses
Yu, Y., Zhang, Y., Chen, X., & Chen, Y. (2019) · Annual Review of Cell and Developmental Biology · doi:10.1146/annurev-cellbio-100818-125218 · Cited by 396
RNAi in Plants: An Argonaute-Centered View
Fang, X., & Qi, Y. (2016) · The Plant Cell · doi:10.1105/tpc.15.00920 · Cited by 357
Metadata
- Authors
- Liu, Q., Yao, X., Pi, L., Wang, H., Cui, X., & Huang, H.
- Venue
- The Plant Journal
- Publisher
- Wiley
- Published
- 2009-03-26
- Volume
- 58
- Issue
- 1
- Pages
- 27-40
- ISSN
- 0960-7412 (ISSN-L)
- 1365-313X
- OpenAlex
- W2111470070
- Cited by
- 186
- References
- 1
- FWCI
- 10.03
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Liu, Q., Yao, X., Pi, L., Wang, H., Cui, X., & Huang, H. (2009). The ARGONAUTE10 gene modulates shoot apical meristem maintenance and establishment of leaf polarity by repressing miR165/166 in Arabidopsis. The Plant Journal. https://doi.org/10.1111/j.1365-313x.2008.03757.x
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