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• W2770105864 abstract "Sub-individual variation in traits of homologous structures has multiple ecological consequences for individuals and populations. Assessing the evolutionary significance of such effects requires an improved knowledge of the mechanisms underlying within-plant phenotypic heterogeneity. The hypothesis that continuous within-plant variation in some phenotypic traits can be associated with epigenetic mosaicism was examined. Fifteen individuals of the long-lived, evergreen Mediterranean shrub Lavandula latifolia were studied. Five widely spaced ‘modules’, each consisting of a single inflorescence plus all its subtending basal leaves, were collected from each shrub. Genomic DNA was extracted from leaf samples and genome-wide cytosine methylation determined by reversed phase high-performance liquid chromatography (HPLC) with spectrofluorimetric detection. The number and mean mass of seeds produced were determined for each inflorescence. An assessment was made of whether (1) leaves from different modules in the same plant differed significantly in global DNA cytosine methylation, and (2) mosaicism in cytosine methylation contributed to explain variation across modules in number and size of seeds. Leaves from different modules in the same plant differed in global DNA cytosine methylation. The magnitude of epigenetic mosaicism was substantial, as the variance in DNA methylation among modules of the same shrub was greater than the variance between individuals. Number and mean mass of seeds produced by individual inflorescences varied within plants and were quadratically related to cytosine methylation of subtending leaves, with an optimum at an intermediate methylation level (approx. 25 %). The results support a causal link between global cytosine methylation of leaves in a module and the size and numbers of seeds produced by the associated inflorescence. It is proposed that variation in global DNA methylation within L. latifolia shrubs may result from the concerted action of plant sectoriality and differential exposure of different plant parts to some environmental factor(s) with a capacity to induce durable epigenetic changes." @default.
• W2770105864 created "2017-12-04" @default.
• W2770105864 creator A5015470301 @default.
• W2770105864 creator A5018533934 @default.
• W2770105864 creator A5038761292 @default.
• W2770105864 creator A5045453076 @default.
• W2770105864 creator A5051131974 @default.
• W2770105864 date "2017-11-24" @default.
• W2770105864 modified "2023-10-03" @default.
• W2770105864 title "Within-plant variation in seed size and inflorescence fecundity is associated with epigenetic mosaicism in the shrub Lavandula latifolia (Lamiaceae)" @default.
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• W2770105864 doi "https://doi.org/10.1093/aob/mcx140" @default.
• W2770105864 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5786237" @default.
• W2770105864 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29186299" @default.
• W2770105864 hasPublicationYear "2017" @default.
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