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- W4235702911 abstract "Abstract Background: Photoperiod-regulated floral transition is vital to the flowering plant. Luculia gratissima ‘Xiangfei’ is a flowering ornamental plant with high development potential and is a short-day woody perennial. However, the genetic regulation of short-day-induced floral transition in L. gratissima is unclear. To systematically research the responses of L. gratissima during this process, dynamic changes in morphology, physiology, and transcript levels were observed and identified in different developmental stages of long-day and short-day-treated shoot apexes. Results: The results showed that floral transition in L. gratissima occurred 10 d after short-day induction, but flower bud differentiation did not occur under long-day conditions. A total of 1,226 differentially expressed genes were identified, of which 146 genes were associated with flowering pathways of sugar, phytohormones, photoperiod, ambient temperature, and aging signals, as well as floral integrator and meristem identity genes. The trehalose-6-phosphate signal positively modulated floral transition by interacting with SPL4 in the aging pathway. Endogenous gibberellin, abscisic acid, cytokinin, and jasmonic acid promoted floral transition, whereas strigolactone inhibited it. In the photoperiod pathway, FD, COL12, and NF-Ys positively controlled floral transition, whereas PRR7, FKF1, and LUX negatively regulated it. SPL4 and pEARLI1 positively affected floral transition. SOC1 and AGL24 integrated multiple flowering signals to modulate the expression of FUL / AGL8 , AP1 , LFY , SEPs , SVP , and TFL1 , thereby regulating floral transition. Finally, we propose a regulatory network model for short-day-induced floral transition in L. gratissima . Conclusions: Short-day photoperiod activated systemic responses of morphology, physiology, and transcript levels in L. gratissima and induced the generation of floral transition signals in the photoperiod pathway. Furthermore, multiple flowering signal pathways including phytohormone-, sugar-, temperature-, age-related genes synergistically control this process. This study improves our understanding of flowering time regulation in L. gratissima and provides knowledge for its production and commercialization." @default.
- W4235702911 created "2022-05-12" @default.
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- W4235702911 date "2020-10-19" @default.
- W4235702911 modified "2023-09-28" @default.
- W4235702911 title "Morphological, Physiological, and Molecular Responses of Sweetly Fragrant Luculia Gratissima During the Floral Transition Stage Induced by Short-day Photoperiod" @default.
- W4235702911 doi "https://doi.org/10.21203/rs.3.rs-92695/v1" @default.
- W4235702911 hasPublicationYear "2020" @default.
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