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Horticulturae
Special Issues
Circadian Rhythm Regulation of Growth and Development in Horticultural Plants
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Circadian Rhythm Regulation of Growth and Development in Horticultural Plants

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: 22 December 2025 | Viewed by 2185

Special Issue Editors

Prof. Dr. Ai-Sheng Xiong

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Guest Editor
State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, China
Interests: plant growth regulators; circadian clock; plant biotechnology; plant genetics and breeding
Special Issues, Collections and Topics in MDPI journals
Dr. Hui Liu

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Guest Editor
State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
Interests: horticutural plants; circadian clock; flowering time; fruit ripening

Special Issue Information

Dear Colleagues,

The circadian clock is a molecular timing device repeatedly characterized to regulate various physiological and developmental processes with an endogenous rhythm. Conceptually, a circadian system can be divided into three parts: the central oscillator that generates the diurnal rhythms, input pathways showing that the indicated oscillators are entrained by signals from the environment cues such as light and output pathways that convey circadian rhythms to diverse physiological and molecular processes. Over the years, circadian clock oscillators have been focused on playing pivotal roles in regulating various aspects of horticultural plant growth and development, ranging from seed germination to fruit ripening.

The purpose of this Special Issue, “Circadian Rhythm Regulation of Growth and Development in Horticultural Plants”, is to present a comprehensive platform for researchers, scientists, and practitioners worldwide to explore how the circadian clock regulates the growth period and development of horticultural plants, including fruit, vegetable, and ornamental species.

Prof. Dr. Ai-Sheng Xiong
Dr. Hui Liu
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

  • plant growth regulators
  • circadian rhythm
  • circadian clock
  • horticultural plants
  • signal transduction
  • physiological and molecular processes
  • fruit ripening

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Published Papers (2 papers)

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18 pages, 3801 KB  
Article
Characteristics and Transcriptome Analysis of Anther Abortion in Male Sterile Celery (Apium graveolens L.)
by Yao Gong, Zhenyue Yang, Huan Li, Kexiao Lu, Chenyang Wang, Aisheng Xiong, Yangxia Zheng, Guofei Tan and Mengyao Li
Horticulturae 2025, 11(8), 901; https://doi.org/10.3390/horticulturae11080901 - 3 Aug 2025
Viewed by 490
Abstract
To elucidate the molecular mechanisms underlying anther abortion in celery male sterile lines, this study investigates the morphological differences of floral organs and differential gene expression patterns between two lines at the flowering stage. Using the male sterile line of celery ‘QCBU-001’ and [...] Read more.
To elucidate the molecular mechanisms underlying anther abortion in celery male sterile lines, this study investigates the morphological differences of floral organs and differential gene expression patterns between two lines at the flowering stage. Using the male sterile line of celery ‘QCBU-001’ and the fertile line ‘Jinnan Shiqin’ as materials, anther structure was analyzed by paraffin sections, and related genes were detected using transcriptome sequencing and qRT-PCR. The results indicated that the anther locules were severely shrunken at maturity in the sterile lines. The callose deficiency led to abnormal development of microspores, preventing the formation of mature pollen grains and ultimately leading to complete anther abortion. The transcriptome results revealed that 3246 genes were differentially expressed in sterile and fertile lines, which were significantly enriched in pathways such as starch and sucrose metabolism and phenylpropanoid biosynthesis. Additionally, differential expression patterns of transcription factor families (MYB, bHLH, AP2, GRAS, and others) suggested their potential involvement in regulating anther abortion. Notably, the expression level of callose synthase gene AgGSL2 was significantly downregulated in sterile anthers, which might be an important cause of callose deficiency and pollen sterility. This study not only provides a theoretical basis for elucidating the molecular mechanism underlying male sterility in celery but also lays a foundation for the utilization and improvement of male sterile lines in vegetable hybrid breeding. Full article
(This article belongs to the Special Issue Circadian Rhythm Regulation of Growth and Development in Horticultural Plants)
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20 pages, 23771 KB  
Article
Comparative Transcriptome Analysis Revealed the New Role of Hormones in Flower Bud Differentiation of Peach Trees Under Different Chilling Hours
by Ruxuan Niu, Juanjuan Huang, Falin Wang, Yiwen Zhang and Chenbing Wang
Horticulturae 2024, 10(12), 1292; https://doi.org/10.3390/horticulturae10121292 - 4 Dec 2024
Viewed by 1256
Abstract
Peach bud differentiation is commercially significant for fruit production. Bud differentiation in peach production is closely linked to chilling requirements. This study investigates the mechanisms of flower bud differentiation in peach varieties L12 and N1 under varying chilling requirements by comparing paraffin sections, [...] Read more.
Peach bud differentiation is commercially significant for fruit production. Bud differentiation in peach production is closely linked to chilling requirements. This study investigates the mechanisms of flower bud differentiation in peach varieties L12 and N1 under varying chilling requirements by comparing paraffin sections, hormone content changes, and transcriptomes during four chilling hours and the same physiological stage. At 400 chilling hours, significant changes in flower bud differentiation were observed. During this period, the hormone levels of auxin and gibberellin reached their peak, while abscisic acid levels were at their lowest. This finding indicates that 400 chilling hours has a significant regulatory effect on flower bud development. Transcriptome analysis revealed that 4719 differentially expressed genes were identified in the flower bud differentiation of L12-4 and N1-4, and 2717 differentially expressed genes of L12-8 and N1-2, many of which are involved in IAA, GA, and ABA signal transduction pathways. In N1, the differentially expressed genes AUX/IAA, SAUR, and DELLA were significantly higher than in L12, whereas genes associated with the ABA synthesis pathway, such as PYL2, PYL8, and SRK2A, remained at the lowest level. This study provides a crucial molecular basis for understanding the regulation of plant hormones and their effects on flower bud development under varying chilling hours. Full article
(This article belongs to the Special Issue Circadian Rhythm Regulation of Growth and Development in Horticultural Plants)
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