GhNAC83 inhibits corm dormancy release by regulating ABA signaling and cytokinin biosynthesis in Gladiolus hybridus

© The Author(s) 2018. Published by Oxford University Press on behalf of the Society for Experimental Biology.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 70(2019), 4 vom: 20. Feb., Seite 1221-1237
1. Verfasser: Wu, Jian (VerfasserIn)
Weitere Verfasser: Jin, Yujie, Liu, Chen, Vonapartis, Eliana, Liang, Jiahui, Wu, Wenjing, Gazzarrini, Sonia, He, Junna, Yi, Mingfang
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't ABA NAC corm cytokinins dormancy gladiolus Cytokinins Plant Proteins mehr... Abscisic Acid 72S9A8J5GW
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520 |a Corm dormancy is an important trait for breeding in many bulb flowers, including the most cultivated Gladiolus hybridus. Gladiolus corms are modified underground stems that function as storage organs and remain dormant to survive adverse environmental conditions. Unlike seed dormancy, not much is known about corm dormancy. Here, we characterize the mechanism of corm dormancy release (CDR) in Gladiolus. We identified an important ABA (abscisic acid) signaling regulator, GhPP2C1 (protein phosphatase 2C1), by transcriptome analysis of CDR. GhPP2C1 expression increased during CDR, and silencing of GhPP2C1 expression in dormant cormels delayed CDR. Furthermore, we show that GhPP2C1 expression is directly regulated by GhNAC83, which was identified by yeast one-hybrid library screening. In planta assays show that GhNAC83 is a negative regulator of GhPP2C1, and silencing of GhNAC83 promoted CDR. As expected, silencing of GhNAC83 decreased the ABA level, but also dramatically increased cytokinin (CK; zeatin) content in cormels. Binding assays demonstrate that GhNAC83 associates with the GhIPT (ISOPENTENYLTRANSFERASE) promoter and negatively regulates zeatin biosynthesis. Taken together, our results reveal that GhNAC83 promotes ABA signaling and synthesis, and inhibits CK biosynthesis pathways, thereby inhibiting CDR. These findings demonstrate that GhNAC83 regulates the ABA and CK pathways, and therefore controls corm dormancy 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a ABA 
650 4 |a NAC 
650 4 |a corm 
650 4 |a cytokinins 
650 4 |a dormancy 
650 4 |a gladiolus 
650 7 |a Cytokinins  |2 NLM 
650 7 |a Plant Proteins  |2 NLM 
650 7 |a Abscisic Acid  |2 NLM 
650 7 |a 72S9A8J5GW  |2 NLM 
700 1 |a Jin, Yujie  |e verfasserin  |4 aut 
700 1 |a Liu, Chen  |e verfasserin  |4 aut 
700 1 |a Vonapartis, Eliana  |e verfasserin  |4 aut 
700 1 |a Liang, Jiahui  |e verfasserin  |4 aut 
700 1 |a Wu, Wenjing  |e verfasserin  |4 aut 
700 1 |a Gazzarrini, Sonia  |e verfasserin  |4 aut 
700 1 |a He, Junna  |e verfasserin  |4 aut 
700 1 |a Yi, Mingfang  |e verfasserin  |4 aut 
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773 1 8 |g volume:70  |g year:2019  |g number:4  |g day:20  |g month:02  |g pages:1221-1237 
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