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Functional Plant Biology Functional Plant Biology Society
Plant function and evolutionary biology
RESEARCH ARTICLE

Perception of strigolactones and the coordinated phytohormonal regulation on rice (Oryza sativa) tillering is affected by endogenous ascorbic acid

Le Yu https://orcid.org/0000-0002-8139-3488 A , Jiankai Zhou A , Junlong Lin A , Mengwei Chen A , Fang Liu A , Xinlin Zheng A , Liping Zhou A , Ruozhong Wang B , Langtao Xiao B and Yonghai Liu orcid.org/0000-0002-2741-9800 A C *
+ Author Affiliations
- Author Affiliations

A College of Life Science, Zhaoqing University, Zhaoqing, Guangdong 526061, China.

B Hunan Provincial Key Laboratory of Phytohormones and Growth Development, Hunan Agricultural University, Changsha, Hunan 410128, China.

C Zhaoqing Branch Center of Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, Zhaoqing, Guangdong 526238, China.

* Correspondence to: 534537324@qq.com

Handling Editor: Nieves Fernandez-Garcia

Functional Plant Biology 51, FP23148 https://doi.org/10.1071/FP23148
Submitted: 12 July 2023  Accepted: 16 January 2024  Published: 8 February 2024

© 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Phytohormones play a key role in regulating tiller number. Ascorbic acid (Asc)-phytohormone interaction plays a pivotal role in the regulation of senescence. We analysed the relationship between Asc and the enzyme concentrations and gene transcript abundances related to the signal perception of strigolactones (SLs), the contents of four phytohormones (abscisic acid, ABA; jasmonic acid, JA; indole acetic acid, IAA; cytokinin, CTK), the enzyme concentrations and gene transcript abundances related to the synthesis or transportation of these four phytohormones. Our results showed that Asc deficiency leads to the upregulation of enzyme concentrations, gene transcript abundances related to the SL signal perception, ABA synthesis and IAA transport. The altered level of Asc also leads to a change in the contents of ABA, JA, IAA and CTK. These findings support the conclusion that Asc or Asc/DHA play an important role in the signal perception and transduction of SLs, and Asc may affect the coordinated regulation of SL, IAA and CTK on rice (Oryza sativa) tillering.

Keywords: abscisic acid, ascorbic acid, auxin, cytokinin, phytohormones, rice, strigolactones, tiller.

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