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Article|06 Sep 2022|OPEN
A perspective on the molecular mechanism in the control of organ internal (IN) asymmetry during petal development
Qianxia Yu1 , Liangfa Ge1 , Sagheer Ahmad2 , Da Luo3 , and Xin Li,4 ,
1Department of Grassland Science, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
2Guangdong Academy of Agricultural Sciences, Guangzhou 510642, China
3Key Laboratory of Soybean Molecular Design Breeding, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, China
4College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
*Corresponding author. E-mail: dluo@sibs.ac.cn,lixin@njau.edu.cn

Horticulture Research 9,
Article number: uhac202 (2022)
doi: https://doi.org/10.1093/hr/uhac202
Views: 363

Received: 23 Jun 2022
Accepted: 31 Aug 2022
Published online: 06 Sep 2022

Abstract

Floral zygomorphy (monosymmetry) is a key innovation in flowering plants and is related to the coevolution of plants and their animal pollinators. The molecular basis underlying floral zygomorphy has been analysed, and two regulatory pathways have been identified: one determines the dorsoventral (DV) asymmetry along the floral plan, and the other controls organ internal (IN) asymmetry during petal development. While strides have been made to understand the molecular mechanism controlling DV asymmetry, which mainly involves an interplay between TCP and MYB transcription factors, the molecular pathway regulating IN asymmetry remains largely unknown. In this review, we discuss what is known about regulators and the molecular pathway regulating IN asymmetry. Our analysis revealed that the regulation of IN asymmetry occurs at the cellular, tissue, and organ genesis levels during petal development and that the regulatory mechanism is likely integrated into different developmental paths, such as floral and root nodule development. Although the molecular regulation of IN asymmetry is not be a linear path, a key hub for the regulatory network could be vascular patterning during petal organogenesis.