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- W4230027433 abstract "Abstract Background: Osmanthus fragrans Lour. is one of the top ten traditional ornamental flower in China. The flower time of once-flowering cultivars in O . fragrans is greatly affected by the relatively low temperature, but there is few reports on its molecular mechanism to date. Results: In this study, the cell size of adaxial and abaxial petal epidermal cells and ultrastructural morphology of petal cells at different developmental stages were observed. The cell size of adaxial and abaxial petal epidermal cells increased gradually with the process of flower opening. Then the transcriptomic sequencing was employed to analyze the differentially expressed genes (DEGs) under different days’ treatments with relatively low temperatures (19°C) or 23°C. Analysis of DEGs in GO analysis showed that “metabolic process”, “cellular process”, “binding”, “catalytic activity”, “cell”, “cell part”, “membrane”, “membrane part”, “single-organism process”, and “organelle” were highly enriched. In KEGG analysis, “metabolic pathways”, “biosynthesis of secondary metabolites”, “plant-pathogen interaction”, “starch and sucrose metabolism”, and “plant hormone signal transduction” were the top five pathways containing the greatest number of DEGs. DEGs involved in cell wall metabolism, phytohormone signal transduction pathways, and eight kinds of transcription factors were analyzed in depth. Conclusions: Several unigenes involved in cell wall metabolism, phytohormone signal transduction pathway, and TFs with highly variable expression levels between different temperature treatments may be involved in petal cell expansion during flower opening process in response to the relatively low temperature. These results could improve our understanding of the molecular mechanism of relatively low temperature regulating flower opening of O. fragrans and provide theoretical reference for the prediction and regulation of flowering time and genetic modification in O . fragrans ." @default.
- W4230027433 created "2022-05-11" @default.
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- W4230027433 date "2020-04-28" @default.
- W4230027433 modified "2023-09-28" @default.
- W4230027433 title "Transcriptomic analysis of flower opening response to relatively low temperatures in Osmanthus fragrans" @default.
- W4230027433 doi "https://doi.org/10.21203/rs.3.rs-24581/v1" @default.
- W4230027433 hasPublicationYear "2020" @default.
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