AUXIN RESPONSE FACTOR7 integrates gibberellin and auxin signaling via interactions between DELLA and AUX/IAA proteins to regulate cambial activity in poplar (Record no. 53581)

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control field 20250625162431.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-19453
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245 10 - TITLE STATEMENT
Title AUXIN RESPONSE FACTOR7 integrates gibberellin and auxin signaling via interactions between DELLA and AUX/IAA proteins to regulate cambial activity in poplar
490 0# - SERIES STATEMENT
Volume/sequential designation The Plant Cell, 34, p.2688-2707, 2022
520 3# - SUMMARY, ETC.
Summary, etc. Cambial development in the stems of perennial woody species is rigorously regulated by phytohormones. Auxin and gibberellin (GA)play crucial roles in stimulating cambial activity in poplar (Populus spp.). In this study, we show that the DELLA protein REPRESSOR of ga1-3 Like 1 (RGL1), AUXIN RESPONSE FACTOR 7 (ARF7), and Aux/INDOLE-3-ACETIC ACID 9 (IAA9)form a ternary complex that mediates crosstalk between the auxin and GA signaling pathways in poplar stems during cambial development. Biochemical analysis revealed that ARF7 physically interacts with RGL1 and IAA9 through distinct domains. The arf7 loss-of-function mutant showed markedly attenuated responses to auxin and GA, whereas transgenic poplar plants overexpressing ARF7 displayed strongly improved cambial activity. ARF7 directly binds to the promoter region of the cambial stem cell regulator WOX4 to modulate its expression, thus integrating auxin and GA signaling to regulate cambial activity. Furthermore, the direct activation of PIN-FORMED 1 expression by ARF7 in the RGL1-ARF7-IAA9 module increased GA-dependent cambial activity via polar auxin transport. Collectively, these findings reveal that the crosstalk between auxin and GA signaling mediated by the RGL1-ARF7-IAA9 module is crucial for the precise regulation of cambial development in poplar.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Hu, J.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Su, H.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Cao, H.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Wei, H.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Fu, X.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Jiang, X.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Luo, K.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1vL2IL9wd7gR1KDFppFiH5eJDQFvw5DOs/view?usp=drivesdk">https://drive.google.com/file/d/1vL2IL9wd7gR1KDFppFiH5eJDQFvw5DOs/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-19453 25.06.2025 25.06.2025 Documentos solicitados