Evolutionary Insight into the Clock-Associated PRR5 Transcriptional Network of Flowering Plants

Scientific Reports
Yosuke TodaNorihito Nakamichi

Abstract

Circadian clocks regulate the daily timing of metabolic, physiological, and behavioral activities to adapt organisms to day-night cycles. In the model plant Arabidopsis thaliana, transcript-translational feedback loops (TTFL) constitute the circadian clock, which is conserved among flowering plants. Arabidopsis TTFL directly regulates key genes in the clock-output pathways, whereas the pathways for clock-output control in other plants is largely unknown. Here, we propose that the transcriptional networks of clock-associated pseudo-response regulators (PRRs) are conserved among flowering plants. Most PRR genes from Arabidopsis, poplar, and rice encode potential transcriptional repressors. The PRR5-target-like gene group includes genes that encode key transcription factors for flowering time regulation, cell elongation, and chloroplast gene expression. The 5'-upstream regions of PRR5-target-like genes from poplar and rice tend to contain G-box-like elements that are potentially recognized by PRRs in vivo as has been shown in Arabidopsis. Expression of PRR5-target-like genes from poplar and rice tends to decrease when PRRs are expressed, possibly suggesting that the transcriptional network of PRRs is evolutionarily conserved in th...Continue Reading

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Citations

Nov 2, 2019·Genes·Marta I TerryMarcos Egea-Cortines
Apr 4, 2021·International Journal of Molecular Sciences·Zaira M López-JuárezPlinio Guzmán

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BETA
EU952116
AY970701

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BETA
transgenic

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MEME ( Multiple Em for Motif Elicitation )
Phaser
MEGA7
MEME Em for
Phytozome
DIURNAL
Excel
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