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Mechanisms of Plant Growth Regulation: From Hormonal Control to Genetic...
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Mechanisms of Plant Growth Regulation: From Hormonal Control to Genetic Networks

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Development and Morphogenesis".

Deadline for manuscript submissions: 20 December 2025 | Viewed by 872

Special Issue Editor

Prof. Dr. Man-Ho Oh

E-Mail Website
Guest Editor
Department of Biological Sciences, Chungnam National University, Daejeon 34134, Republic of Korea
Interests: plant stress biology; cell signaling; plant–microbial interaction; gene transformation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue “Mechanisms of Plant Growth Regulation: From Hormonal Control to Genetic Networks” aims to provide an exploration of how plants regulate their growth and development through hormonal signals and genetic networks. With advancements in plant biology, our understanding of these regulatory mechanisms has expanded significantly. We will seek innovative research on the roles of plant hormones, genetic pathways, and molecular interactions that govern plant growth. We invite contributions that offer insights into how hormonal signals influence growth patterns, how genetic networks orchestrate developmental processes, and how these mechanisms integrate with environmental factors.

We encourage researchers to share their findings and perspectives to advance our collective understanding of plant growth mechanisms through this Special Issue.

Prof. Dr. Man-Ho Oh
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plants is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • growth regulation
  • molecular mechanisms
  • hormonal control
  • genetic networks

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Published Papers (1 paper)

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Research

18 pages, 8874 KiB  
Article
Auxin Controls Root Gravitropic Response by Affecting Starch Granule Accumulation and Cell Wall Modification in Tomato
by Huabin Liu, Yue Wu, Jiahui Cai, Lele Xu, Cheng Zhou and Chengliang Wang
Plants 2025, 14(7), 1020; https://doi.org/10.3390/plants14071020 - 25 Mar 2025
Cited by 1 | Viewed by 600
Abstract
The gravitropic growth of roots is crucial for plants to adapt to terrestrial environments and acquire nutrients from the soil. Tomatoes are a vital economic crop that requires abundant water and nutrients for growth and development. However, there are few reports on the [...] Read more.
The gravitropic growth of roots is crucial for plants to adapt to terrestrial environments and acquire nutrients from the soil. Tomatoes are a vital economic crop that requires abundant water and nutrients for growth and development. However, there are few reports on the regulatory mechanisms of tomato root gravitropism, particularly auxin-mediated root gravitropic growth. Here, we revealed the signaling pathway of auxin regulating tomato root gravity response through exogenous auxin and auxin inhibitor treatment combined with transcriptome profiling. Our data underscore the necessity of auxin biosynthesis, transport, and optimal levels for the gravitropic growth of tomato roots. Treatment with exogenous auxin or auxin biosynthesis inhibitors diminished gravitropic response in tomato roots. Conversely, treatment with an auxin transport inhibitor led to a robust agravitropic response. Furthermore, we observed that auxin controls root gravitropic growth by establishing concentration gradients and influences root perception of gravity signals by positively regulating starch granule accumulation. Treatment with the exogenous auxin NAA heightened starch synthesis, while exogenous application of the auxin biosynthesis inhibitor yucasin dampened starch synthesis in tomato roots. Our study observed a slow gravitropic response in cultivated cherry tomato (Aisheng) roots. Time series analysis showed that tomato roots bend toward gravity at a slower rate. Transcriptome analysis revealed that many (2770) differentially expressed genes (DEGs) were identified in roots following 36 h of gravity stimulation. In contrast, only 58 DEGs were detected after 3 h of gravity stimulation, further supporting the slow gravitropic response phenotype of tomato roots. GO and KEGG analysis highlighted auxin response, starch and sugar metabolism, and cell wall modification as the major regulatory pathways involved in the gravitropic response and growth of tomato roots. Our results indicate that auxin mediates root sensing of gravity signals through feedback regulation of starch accumulation and controls root gravitropic bending by regulating the expression of cell wall modification-related genes. Full article
(This article belongs to the Special Issue Mechanisms of Plant Growth Regulation: From Hormonal Control to Genetic Networks)
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