A molecular module connects abscisic acid with auxin signals to facilitate seasonal wood formation in Populus
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Perennial trees have a recurring annual cycle of wood formation in response to environmental fluctuations. However, the precise molecular mechanisms that regulate the seasonal formation of wood remain poorly understood. Our prior study indicates that VCM1 and VCM2 play a vital role in regulating the activity of the vascular cambium by controlling the auxin homoeostasis of the cambium zone in Populus. This study indicates that abscisic acid (ABA) affects the expression of VCM1 and VCM2, which display seasonal fluctuations in relation to photoperiod changes. ABA-responsive transcription factors AREB4 and AREB13, which are predominantly expressed in stem secondary vascular tissue, bind to VCM1 and VCM2 promoters to induce their expression. Seasonal changes in the photoperiod affect the ABA amount, which is linked to auxin-regulated cambium activity via the functions of VCM1 and VCM2. Thus, the study reveals that AREB4/AREB13-VCM1/VCM2-PIN5b acts as a molecular module connecting ABA and auxin signals to control vascular cambium activity in seasonal wood formation.
Originalsprog | Engelsk |
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Tidsskrift | Plant Cell and Environment |
Antal sider | 14 |
ISSN | 0140-7791 |
DOI | |
Status | E-pub ahead of print - 2024 |
Bibliografisk note
Funding Information:
This work was supported by the National Nature Science Foundation of China (32130072), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB0630203) and the National Key Research and Development Program (2021YFD2200204) to L. L.
Publisher Copyright:
© 2024 John Wiley & Sons Ltd.
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