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. 2017 Jul 13;8:1217. doi: 10.3389/fpls.2017.01217

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Copyright © 2017 de los Reyes, Romero-Campero, Ruiz, Romero and Valverde.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The clustering of the clock-regulated genes does not change substantially between ND and LD conditions in Arabidopsis. (A) Venn diagrams representing genes in LD (red) and ND (blue) clusters. In LD conditions a higher percentage of genes (41%) follow a circadian expression than in ND (33%). Most genes identified as circadian in ND conditions (7640) exhibit circadian patterns also in LD (5143, 76%). Nevertheless, new genes are identified as circadian in LD (6014, 55%) indicating a higher circadian dependence in LD. (B) In the gene co-expression network composed of circadian genes in LD (11157), the same ring-like structure as in ND conditions is observed. This is constituted by the sequential distribution of the clusters constituted by genes peaking at Dawn (red), Day (yellow), Dusk (blue), and Night (black). (C) In the representation of the clusters obtained in ND conditions intersecting with the gene co-expression network in LD conditions (deep purple, 5143 genes), an apparent conservation of the circadian pattern is observed.