Alternative functions of Hd1 in repressing or promoting heading are determined by Ghd7 status under long-day conditions

Abstract Previous studies suggested that Hd1 promoted heading under short-day conditions (SD) and delayed heading under long-day conditions (LD). However in this study, Hd1 was demonstrated to consistently promote heading date in Zhenshan 97 (ZS97) background by upregulating Ehd1, Hd3a and RFT1 expr...

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Autores principales:	Zhanyi Zhang, Wei Hu, Guojing Shen, Haiyang Liu, Yong Hu, Xiangchun Zhou, Touming Liu, Yongzhong Xing
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a441f49659e14da28fc6a8371267fc17
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spelling	oai:doaj.org-article:a441f49659e14da28fc6a8371267fc172021-12-02T11:53:07ZAlternative functions of Hd1 in repressing or promoting heading are determined by Ghd7 status under long-day conditions10.1038/s41598-017-05873-12045-2322https://doaj.org/article/a441f49659e14da28fc6a8371267fc172017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05873-1https://doaj.org/toc/2045-2322Abstract Previous studies suggested that Hd1 promoted heading under short-day conditions (SD) and delayed heading under long-day conditions (LD). However in this study, Hd1 was demonstrated to consistently promote heading date in Zhenshan 97 (ZS97) background by upregulating Ehd1, Hd3a and RFT1 expression under both SD and LD. While the high photoperiod sensitivity of Hd1 was observed in Minghui 63 (MH63) background, with heading being suppressed in LD but promoted in SD. Comparative analysis of two sets of near isogenic lines of Hd1 in MH63 and ZS97 backgrounds indicated that the alternative functions of Hd1 in promoting or suppressing heading under LD are dependent on the previously cloned flowering repressor gene Ghd7. The interaction between proteins Ghd7 and Hd1 occurred through binding of the CCT domain of Ghd7 to the transcription-activating domain of Hd1, resulting in suppression of Ehd1 and florigen gene expression. The involvement of the transcription-activating domain of Hd1 in this protein-protein interaction probably blocked or weakened its transcriptional activity. These findings suggest that Hd1 alone essentially acts as a promoter of heading date, and the protein interaction between Ghd7 and Hd1 determines photoperiod sensitivity and integrated Hd1-mediated and Ehd1-mediated flowering pathways in rice.Zhanyi ZhangWei HuGuojing ShenHaiyang LiuYong HuXiangchun ZhouTouming LiuYongzhong XingNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zhanyi Zhang Wei Hu Guojing Shen Haiyang Liu Yong Hu Xiangchun Zhou Touming Liu Yongzhong Xing Alternative functions of Hd1 in repressing or promoting heading are determined by Ghd7 status under long-day conditions
description	Abstract Previous studies suggested that Hd1 promoted heading under short-day conditions (SD) and delayed heading under long-day conditions (LD). However in this study, Hd1 was demonstrated to consistently promote heading date in Zhenshan 97 (ZS97) background by upregulating Ehd1, Hd3a and RFT1 expression under both SD and LD. While the high photoperiod sensitivity of Hd1 was observed in Minghui 63 (MH63) background, with heading being suppressed in LD but promoted in SD. Comparative analysis of two sets of near isogenic lines of Hd1 in MH63 and ZS97 backgrounds indicated that the alternative functions of Hd1 in promoting or suppressing heading under LD are dependent on the previously cloned flowering repressor gene Ghd7. The interaction between proteins Ghd7 and Hd1 occurred through binding of the CCT domain of Ghd7 to the transcription-activating domain of Hd1, resulting in suppression of Ehd1 and florigen gene expression. The involvement of the transcription-activating domain of Hd1 in this protein-protein interaction probably blocked or weakened its transcriptional activity. These findings suggest that Hd1 alone essentially acts as a promoter of heading date, and the protein interaction between Ghd7 and Hd1 determines photoperiod sensitivity and integrated Hd1-mediated and Ehd1-mediated flowering pathways in rice.
format	article
author	Zhanyi Zhang Wei Hu Guojing Shen Haiyang Liu Yong Hu Xiangchun Zhou Touming Liu Yongzhong Xing
author_facet	Zhanyi Zhang Wei Hu Guojing Shen Haiyang Liu Yong Hu Xiangchun Zhou Touming Liu Yongzhong Xing
author_sort	Zhanyi Zhang
title	Alternative functions of Hd1 in repressing or promoting heading are determined by Ghd7 status under long-day conditions
title_short	Alternative functions of Hd1 in repressing or promoting heading are determined by Ghd7 status under long-day conditions
title_full	Alternative functions of Hd1 in repressing or promoting heading are determined by Ghd7 status under long-day conditions
title_fullStr	Alternative functions of Hd1 in repressing or promoting heading are determined by Ghd7 status under long-day conditions
title_full_unstemmed	Alternative functions of Hd1 in repressing or promoting heading are determined by Ghd7 status under long-day conditions
title_sort	alternative functions of hd1 in repressing or promoting heading are determined by ghd7 status under long-day conditions
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a441f49659e14da28fc6a8371267fc17
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Alternative functions of Hd1 in repressing or promoting heading are determined by Ghd7 status under long-day conditions

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