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Horticulturae
Special Issues
The Role of Plant Growth Regulators in Horticulture
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The Role of Plant Growth Regulators in Horticulture

A special issue of Horticulturae (ISSN 2311-7524). This special issue belongs to the section "Developmental Physiology, Biochemistry, and Molecular Biology".

Deadline for manuscript submissions: 5 March 2025 | Viewed by 2181

Special Issue Editors

Dr. Mack Moyo

E-Mail Website
Guest Editor
Department of Horticulture, Faculty of Applied Sciences, Durban University of Technology, P.O. Box 1334, Durban 4000, South Africa
Interests: stress physiology; plant growth hormones; plant growth and development
Prof. Dr. Stephen O. Amoo

E-Mail Website
Guest Editor
Agricultural Research Council–Vegetables, Industrial and Medicinal Plants, Private Bag X293, Pretoria 0001, South Africa
Interests: plant growth regulators; phytohormones; indigenous plant use; micropropagation; secondary metabolite production; biological activities; medicinal plants; plant tissue culture; ethnopharmacology; antimicrobial activity; ethnobotany; plant biotechnology; biostimulants; plant production
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Michael Bairu

E-Mail Website
Guest Editor
Agricultural Research Council–Vegetables, Industrial and Medicinal Plants, Private Bag X293, Pretoria 0001, South Africa
Interests: plant growth regulators; phytohormones; plant tissue culture; plant biotechnology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Special Issue on "The Role of Plant Growth Regulators in Horticulture" delves into the intricate mechanisms by which plant growth regulators (PGRs) control the growth, development, and physiological processes of horticultural plants. PGRs, including hormones such as auxins, gibberellins, cytokinins, abscisic acid, and ethylene, play pivotal roles in regulating various aspects of plant growth and development, ranging from seed germination to fruit ripening.

This Special Issue provides a comprehensive platform for researchers, scientists, and practitioners to explore the multifaceted functions of PGRs in horticulture and their implications for crop improvement, yield optimization, and quality enhancement. Contributions cover a wide spectrum of topics, including the following:

  1. Molecular mechanisms underlying the biosynthesis, signal transduction, and action of PGRs in horticultural plants.
  2. The regulation of plant morphogenesis, including shoot and root growth, branching, and flowering, by PGRs.
  3. Interactions between PGRs and environmental factors, such as light, temperature, and water availability, in shaping plant growth and development.
  4. The applications of PGRs in horticultural practices, including plant tissue culture, crop production, propagation, and postharvest management.
  5. The development and optimization of PGR-based strategies for crop protection, stress mitigation, and abiotic stress tolerance in horticultural plants.
  6. Novel approaches and technologies for the synthesis, formulation, and delivery of PGRs to improve their efficacy and sustainability in horticultural systems.

By elucidating the intricate roles of PGRs in horticultural plant physiology and development, this Special Issue aims to advance our understanding of fundamental plant biology principles and practical applications in horticulture. Through interdisciplinary collaboration and knowledge exchange, researchers and practitioners can harness the potential of PGRs to optimize crop performance, enhance yield and quality, and promote sustainable practices in horticultural production systems.

Dr. Mack Moyo
Prof. Dr. Stephen O. Amoo
Prof. Dr. Michael Bairu
Guest Editors

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. Horticulturae is an international peer-reviewed open access monthly 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 2200 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

  • abiotic stress tolerance
  • climate change resilience
  • plant morphogenesis
  • plant growth regulators
  • plant tissue culture
  • signal transduction
  • sustainable horticulture

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Published Papers (1 paper)

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Research

24 pages, 14048 KiB  
Article
Polyploidization Impact on Plant Architecture of Watermelon (Citrullus lanatus)
by Eftekhar Mahmud, Hongju Zhu, Mohamed Omar Kaseb, Muhammad Zeeshan Sajjad, Nan He, Xuqiang Lu and Wenge Liu
Horticulturae 2024, 10(6), 569; https://doi.org/10.3390/horticulturae10060569 - 29 May 2024
Viewed by 1041
Abstract
Plant architecture includes traits such as plant height, stem diameter, and branching pattern, which have significant impacts on yield and fruit quality. Polyploidization can bring changes in plant architectural traits in different crops along with other agronomic and biochemical attributes; however, the specific [...] Read more.
Plant architecture includes traits such as plant height, stem diameter, and branching pattern, which have significant impacts on yield and fruit quality. Polyploidization can bring changes in plant architectural traits in different crops along with other agronomic and biochemical attributes; however, the specific physiological and biochemical mechanisms are still unclear. In this study, we utilized five watermelon lines: ‘91E7’, ‘Zhengzhou No. 3’, ‘Fanzu No. 1’, ‘Shenlong’, and ‘Houlv’, along with their corresponding autopolyploid derivatives (diploid, autotriploid, and autotetraploid) to compare plant architecture differences in different polyploidy watermelon plants. The results showed that the growth habits of diploid, triploid, and tetraploid watermelon plants were noticeably different. Triploid and tetraploid watermelon plants had greater stem diameters and larger leaf sizes. The leaf angle was also larger in polyploid watermelons than in their diploid ancestor lines. Although vine length was significantly higher in diploid watermelon, there was no significant difference in node number, indicating that the short vine length was due to the short internodal length. The major differences between diploid and polyploid watermelon plants were found in the branching pattern, as diploid watermelon lines have more branching compared to their polyploid sister lines. Furthermore, we examined the phytohormone content of diploid, triploid, and tetraploid ‘Fanzu No. 1’. The reasons for the selection of this material are its robust growth and profuse branching habit, which cause visible differences among the ploidy levels. Hormone analysis showed distinct variations in abscisic acid in the nodal and stem regions, gibberellin in the auxiliary bud regions, and brassinosteroids in the apical meristematic regions. The correlation coefficient also strongly correlated these hormones with architecture-related traits. Our findings indicated that gibberellin, ABA, and brassinosteroids might be associated with variations in plant architectural traits like branching, vine length, internodal length, stem thickness, and leaf angle among different ploidy levels of watermelon. The exogenous application of GA3 showed a positive effect on branching, whereas ABA showed a negative effect on branching. The application of brassinosteroid at the apical meristem demonstrated its effect on leaf angle, leaf size, and internodal length. The results of this study can provide a theoretical reference and valuable insights into the link between plant architecture and ploidy levels. Full article
(This article belongs to the Special Issue The Role of Plant Growth Regulators in Horticulture)
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