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: 10 April 2025 | Viewed by 970

Special Issue Editors


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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

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Keywords

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

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Published Papers (1 paper)

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Research

20 pages, 23771 KiB  
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 732
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
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