Preprint Article Version 1 This version is not peer-reviewed

The Axillary Floral Bud Removal Induced Metabolomics Remodeling and Paradormancy Release in Local Axillary Shoot Bud of Camellia sinensis CV Huangdan

Mingjie Chen
* ORCID logo ,
Zhenghua Du
,
Wenjie Yue
,
Xiangrui Kong
,
Quanming Xu
,
Dongsheng Fang
,
Changsong Chen
*
Version 1 : Received: 6 November 2024 / Approved: 6 November 2024 / Online: 6 November 2024 (12:52:56 CET)

How to cite: Chen, M.; Du, Z.; Yue, W.; Kong, X.; Xu, Q.; Fang, D.; Chen, C. The Axillary Floral Bud Removal Induced Metabolomics Remodeling and Paradormancy Release in Local Axillary Shoot Bud of Camellia sinensis CV Huangdan. Preprints 2024, 2024110402. https://doi.org/10.20944/preprints202411.0402.v1 Chen, M.; Du, Z.; Yue, W.; Kong, X.; Xu, Q.; Fang, D.; Chen, C. The Axillary Floral Bud Removal Induced Metabolomics Remodeling and Paradormancy Release in Local Axillary Shoot Bud of Camellia sinensis CV Huangdan. Preprints 2024, 2024110402. https://doi.org/10.20944/preprints202411.0402.v1

Abstract

In angiosperms, paradormancy, a phenomenon that the growth of axillary buds be arrested by the biochemical signals from other organs or tissues, has been extensively investigated in deciduous perennial woody species. However, little attention has been paid to paradormancy set and release in perennial evergreen trees. Camellia sinensis cv Huangdan develops axillary floral buds and axillary shoot buds within same leaf node simultaneously, with growing floral buds repressing shoot buds leading to their paradormancy. In this study, we manually removed the axillary floral buds, then harvested the axillary shoot buds after 1- and 3- days of the floral bud removal, untargeted metabolomics were conducted to identify metabolome remodeling patterns during paradormancy-to-growth transition. Our data suggest that the restricted supply of reducing hexose and ammonium to the axillary shoot buds could be the major cause leading to their paradormancy. The axillary shoot buds were released from paradormancy one day after the axillary floral bud removal, this transition was accompanied with mobilization and reconfiguration for multiple primary and secondary metabolites. These metabolome reprogramming could help establish the reactive oxygen species gradients along leaf bud meristem, thus facilitate paradormancy set or release. This study provides novel insights about paradormancy set and release in a perennial evergreen tree species.

Keywords

axillary floral bud; axillary shoot bud; Camellia sinensis; metabolomics; paradormancy

Subject

Biology and Life Sciences, Plant Sciences

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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