The importance of endoreduplication for cell patterning in the tomato fruit - Archive ouverte HAL
Communication Dans Un Congrès Année : 2022

The importance of endoreduplication for cell patterning in the tomato fruit

Résumé

Endoreduplication, during which cells increase their DNA content through successive rounds of full genome replication without cell division, is the major source of endopolyploidy in higher plants. Endoreduplication results from the capacity of cells to modify their classical cell cycle into a partial cell cycle, or endocycle, where DNA synthesis occurs independently from mitosis. In plants, endoreduplication is found in numerous organs and cell types and particularly in organs or tissues of agronomical high value, such as tomato fruit presenting high ploidy levels. At the end of tomato fruit development, the pericarp is composed of a heterogeneous population of cells in term of ploidy levels and cell sizes. In addition, at this stage, ploidy-specific gene expression profiles have been found. However, little is known about the onset and progression of endoreduplication during tomato fruit growth and its consequences on the regulation of cell size and gene expression. Our objectives are to study the heterogeneous population of cells that co-exists within the pericarp tissue and as a basis to dissect the genetic regulation of pericarp endoreduplication. Thus, we mapped the ploidy and transcriptome dynamics of the tomato fruit pericarp during early growth. The data showed a global shift of expression in relation to ploidy level as well as ploidy specific gene expression and that ploidy levels are already gradiently distributed in the pericarp. We now aim at elucidating the transcriptional regulatory mechanisms responsible for the molecular heterogeneity related to endoreduplication during fruit development by studying chromatin states and conformation.
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Dates et versions

hal-04704475 , version 1 (20-09-2024)

Identifiants

  • HAL Id : hal-04704475 , version 1

Citer

Édouard Tourdot, Pascal Martin, Eli Maza, Anis Djari, Julien Pirrello, et al.. The importance of endoreduplication for cell patterning in the tomato fruit. SOLANACEAE2022, Nov 2022, Thessalokini, Greece. ⟨hal-04704475⟩
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