Transcription factor MYB26 is key to spatial specificity in anther secondary thickening formation
Successful fertilization relies on the production and effective release of viable pollen. Failure of anther opening (dehiscence), results in male sterility, although the pollen may be fully functional. MYB26 regulates the formation of secondary thickening in the anther endothecium, which is critical...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
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American Society of Plant Biologists
2017
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| Online Access: | https://eprints.nottingham.ac.uk/44302/ |
| _version_ | 1848796884831830016 |
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| author | Yang, Caiyun Song, Jie Ferguson, Alison C. Klisch, Doris Simpson, Kim Mo, Rui Taylor, Ben Mitsuda, Nobutaka Wilson, Zoe A. |
| author_facet | Yang, Caiyun Song, Jie Ferguson, Alison C. Klisch, Doris Simpson, Kim Mo, Rui Taylor, Ben Mitsuda, Nobutaka Wilson, Zoe A. |
| author_sort | Yang, Caiyun |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Successful fertilization relies on the production and effective release of viable pollen. Failure of anther opening (dehiscence), results in male sterility, although the pollen may be fully functional. MYB26 regulates the formation of secondary thickening in the anther endothecium, which is critical for anther dehiscence and fertility. Here, we show that although the MYB26 transcript shows expression in multiple floral organs, the MYB26 protein is localized specifically to the anther endothecium nuclei and that it directly regulates two NAC domain genes, NST1 and NST2, which are critical for the induction of secondary thickening biosynthesis genes. However, there is a complex relationship of regulation between these genes and MYB26. Using DEX-inducible MYB26 lines and overexpression in the various mutant backgrounds, we have shown that MYB26 up-regulates both NST1 and NST2 expression. Surprisingly normal thickening and fertility rescue does not occur in the absence of MYB26, even with constitutively induced NST1 and NST2, suggesting an additional essential role for MYB26 in this regulation. Combined overexpression of NST1 and NST2 in myb26 facilitates limited ectopic thickening in the anther epidermis, but not in the endothecium, and thus fails to rescue dehiscence. Therefore, by a series of regulatory controls through MYB26, NST1, NST2, secondary thickening is formed specifically within the endothecium; this specificity is essential for anther opening. |
| first_indexed | 2025-11-14T19:55:05Z |
| format | Article |
| id | nottingham-44302 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:55:05Z |
| publishDate | 2017 |
| publisher | American Society of Plant Biologists |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-443022020-05-04T19:03:56Z https://eprints.nottingham.ac.uk/44302/ Transcription factor MYB26 is key to spatial specificity in anther secondary thickening formation Yang, Caiyun Song, Jie Ferguson, Alison C. Klisch, Doris Simpson, Kim Mo, Rui Taylor, Ben Mitsuda, Nobutaka Wilson, Zoe A. Successful fertilization relies on the production and effective release of viable pollen. Failure of anther opening (dehiscence), results in male sterility, although the pollen may be fully functional. MYB26 regulates the formation of secondary thickening in the anther endothecium, which is critical for anther dehiscence and fertility. Here, we show that although the MYB26 transcript shows expression in multiple floral organs, the MYB26 protein is localized specifically to the anther endothecium nuclei and that it directly regulates two NAC domain genes, NST1 and NST2, which are critical for the induction of secondary thickening biosynthesis genes. However, there is a complex relationship of regulation between these genes and MYB26. Using DEX-inducible MYB26 lines and overexpression in the various mutant backgrounds, we have shown that MYB26 up-regulates both NST1 and NST2 expression. Surprisingly normal thickening and fertility rescue does not occur in the absence of MYB26, even with constitutively induced NST1 and NST2, suggesting an additional essential role for MYB26 in this regulation. Combined overexpression of NST1 and NST2 in myb26 facilitates limited ectopic thickening in the anther epidermis, but not in the endothecium, and thus fails to rescue dehiscence. Therefore, by a series of regulatory controls through MYB26, NST1, NST2, secondary thickening is formed specifically within the endothecium; this specificity is essential for anther opening. American Society of Plant Biologists 2017-09-01 Article PeerReviewed Yang, Caiyun, Song, Jie, Ferguson, Alison C., Klisch, Doris, Simpson, Kim, Mo, Rui, Taylor, Ben, Mitsuda, Nobutaka and Wilson, Zoe A. (2017) Transcription factor MYB26 is key to spatial specificity in anther secondary thickening formation. Plant Physiology, 175 (1). pp. 333-350. ISSN 1532-2548 http://www.plantphysiol.org/content/175/1/333 doi:10.1104/pp.17.00719 doi:10.1104/pp.17.00719 |
| spellingShingle | Yang, Caiyun Song, Jie Ferguson, Alison C. Klisch, Doris Simpson, Kim Mo, Rui Taylor, Ben Mitsuda, Nobutaka Wilson, Zoe A. Transcription factor MYB26 is key to spatial specificity in anther secondary thickening formation |
| title | Transcription factor MYB26 is key to spatial specificity in anther secondary thickening formation |
| title_full | Transcription factor MYB26 is key to spatial specificity in anther secondary thickening formation |
| title_fullStr | Transcription factor MYB26 is key to spatial specificity in anther secondary thickening formation |
| title_full_unstemmed | Transcription factor MYB26 is key to spatial specificity in anther secondary thickening formation |
| title_short | Transcription factor MYB26 is key to spatial specificity in anther secondary thickening formation |
| title_sort | transcription factor myb26 is key to spatial specificity in anther secondary thickening formation |
| url | https://eprints.nottingham.ac.uk/44302/ https://eprints.nottingham.ac.uk/44302/ https://eprints.nottingham.ac.uk/44302/ |