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Low temperatures impact dormancy status, flowering competence, and transcript profiles in crown buds of leafy spurge.

posted on 2024-06-11, 05:09 authored by USDA-ARS
Leafy spurge (Euphorbia esula) is an herbaceous perennial weed that produces vegetatively from an abundance of underground adventitious buds. The objectives of this study were to determine how mimicking natural seasonal conditions (photoperiod and temperature) under controlled environmental conditions affect dormancy and flowering competence; to determine molecular mechanisms associated with well-defined phases of seasonal dormancy transitions based on transcript profiles obtained by microarray analysis; and to link mechanisms regulating induction and release of endodormancy and flowering competence. Reduction in temperature (27 to 10°C) and photoperiod (16 to 8 h) over a three-month period induced a para- to endo-dormant transition in crown buds. An additional eleven weeks of prolonged cold (5-7°C) and short-photoperiod treatment resulted in accelerated shoot growth from crown buds, and 99% floral competence when plants were returned to growth promoting conditions. Exposure of paradormant plants to short-photoperiod and prolonged cold treatment alone had minimal affect growth potential or on flowering (~1%); whereas endodormant crown buds without prolonged cold treatment, had delayed shoot growth and approximately 2% flowering when returned to growth promoting conditions. Transcriptome analyses revealed that 373 and 260 genes were differentially expressed (p


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  • Non-geospatial

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  • biota

National Agricultural Library Thesaurus terms

transcriptome; gene expression

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  • Public

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It is recommended to cite the accession numbers that are assigned to data submissions, e.g. the GenBank, WGS or SRA accession numbers. If individual BioProjects need to be referenced, state that "The data have been deposited with links to BioProject accession number PRJNA120837 in the NCBI BioProject database ("

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