Advances in Citrus Physiology and Molecular Biology: From Genes to Orchard Performance

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: 30 November 2025 | Viewed by 979

Special Issue Editors


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Guest Editor
Horticultural Sciences Department, Southwest Florida Research and Education Center, Institute of Food and Agricultural Sciences (UF/IFAS), University of Florida, Immokalee, FL 34142-9515, USA
Interests: horticulture; citrus physiology; nursery propagation; seed physiology; scion-rootstock field performance; fruit maturation and quality; postharvest handling and storage

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Guest Editor
Horticultural Sciences Department, Southwest Florida Research and Education Center, Institute of Food and Agricultural Sciences (UF/IFAS), University of Florida, Immokalee, FL 34142-9515, USA
Interests: horticulture; citrus physiology; hormonal regulation of citrus fruit abscission; citrus tree health; fruit maturation and quality; postharvest technology; fruit senescence

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Guest Editor
Brazilian Agricultural Research Corporation (EMBRAPA), Embrapa Cassava & Fruits, Cruz das Almas 44380-000, Brazil
Interests: horticulture; Citrus spp.; scion-rootstock genotype; citrus physiology; citrus cultural practices

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Guest Editor
Centro de Ciências Agrárias, Departamento de Agronomia, Universidade Estadual de Londrina—UEL, Londrina 86057-970, Brazil
Interests: sweet orange; citrus; rootstock; agronomic performance; fruit production; fruit quality
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Special Issue Information

Dear Colleagues,

Citrus crops are among the most widely cultivated fruit trees worldwide, playing a critical role in food security, human nutrition, and economic development across diverse agroecosystems. However, the sustainability and productivity of the citrus industry are increasingly challenged by environmental stresses, pathogens, pests, and changing climate conditions.

To address these pressing issues, a deeper understanding of citrus physiology, from molecular signaling pathways to field-level performance, is needed. This Special Issue of Horticulturae aims to showcase cutting-edge research that unravels the complex biological processes driving citrus growth, development, and stress responses.

We invite contributions that bridge fundamental and applied research, combining insights in gene expression, hormonal regulation, and defense mechanisms with physiological responses observed in controlled and field environments. Studies that integrate molecular tools with practical agronomic strategies are especially encouraged, offering valuable guidance for growers, breeders, and researchers. Research focusing on specific aspects within this spectrum is equally encouraged. We welcome original research articles, reviews, and short communications on, but not limited to, the following topics:

  • Effects of rootstock–scion combinations on citrus physiology and yield;
  • Citrus responses to abiotic and biotic stresses;
  • Resistance mechanisms and defense signaling pathways in citrus;
  • Hormonal control of growth, flowering, and fruit development in citrus;
  • Impact of cultural practices (e.g., irrigation, fertilization, pruning) on citrus growth and productivity;
  • Advances and innovations in citrus production systems;
  • Strategies for integrated management of citrus pests and diseases;
  • Sustainable practices to improve citrus production and resource use efficiency;
  • Physiology of fruit maturation, postharvest quality, and storage;
  • Field studies on yield, tree performance, and physiological traits;
  • Genetic and biotechnological tools to improve citrus stress tolerance and productivity

Dr. Deived Uilian De Carvalho
Dr. Fernando Alferez
Dr. Eduardo Augusto Girardi
Dr. Maria Aparecida Da Cruz Bejatto
Guest Editors

Manuscript Submission Information

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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

  • citrus physiology
  • abiotic stress tolerance
  • biotic stress resistance
  • hormonal regulation
  • rootstock–scion interaction
  • sustainable citrus production
  • postharvest quality
  • crop management practices
  • molecular biology of citrus
  • genetic improvement

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Published Papers (1 paper)

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Research

22 pages, 2612 KB  
Article
Systemic Delivery of Oxytetracycline by Drill-Based and Drill-Free Trunk Injection for Treatment of Huanglongbing in Young Sweet Orange Trees
by Ute Albrecht, Caroline Tardivo, Gerardo Moreno and Jasmine de Freitas
Horticulturae 2025, 11(8), 976; https://doi.org/10.3390/horticulturae11080976 - 18 Aug 2025
Viewed by 726
Abstract
The systemic delivery of oxytetracycline (OTC) by trunk injection has emerged as a viable strategy to manage huanglongbing (HLB, also known as citrus greening), a bacterial disease devastating citrus production around the world. This study examines the efficacy of delivering OTC systemically into [...] Read more.
The systemic delivery of oxytetracycline (OTC) by trunk injection has emerged as a viable strategy to manage huanglongbing (HLB, also known as citrus greening), a bacterial disease devastating citrus production around the world. This study examines the efficacy of delivering OTC systemically into the trunk of young, HLB-affected citrus trees using a drill-based or a drill-free system to improve tree health and productivity. Two field trials were conducted in two commercial production sites in Florida. Trees were four years old at the start of the study and composed of ‘Valencia’ or ‘OLL-8’ sweet orange (Citrus sinensis) scion grafted on X-639 (C. reticulata × Poncirus trifoliata) rootstock. Injections were performed in spring or late summer/early fall in 2022 and 2023. Using the drill-based system, 0.79 g of OTC was administered into each tree, whereas 0.15 g or 0.3 g was administered using the drill-free system. Delivering a higher dose of OTC by drill-based injection increased fruit yield and improved juice quality more than delivering lower doses by drill-free injection, though responses varied between cultivars. Injections in late summer/early fall increased the juice total soluble solids content considerably more than injections in spring. However, fall injections resulted in OTC fruit residues exceeding the maximum allowed level. Trunk injury was more extensive when OTC was applied with the drill-free system than when it was applied with the drill-based system. Full article
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