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Transcriptional Structure of Petunia Clock in Leaves and Petals.

Abstract：

:The plant circadian clock coordinates environmental signals with internal processes including secondary metabolism, growth, flowering, and volatile emission. Plant tissues are specialized in different functions, and petals conceal the sexual organs while attracting pollinators. Here we analyzed the transcriptional structure of the petunia (Petunia x hybrida) circadian clock in leaves and petals. We recorded the expression of 13 clock genes in petunia under light:dark (LD) and constant darkness (DD). Under light:dark conditions, clock genes reached maximum expression during the light phase in leaves and the dark period in petals. Under free running conditions of constant darkness, maximum expression was delayed, especially in petals. Interestingly, the rhythmic expression pattern of PhLHY persisted in leaves and petals in LD and DD. Gene expression variability differed among leaves and petals, time of day and photoperiod. The transcriptional noise was higher especially in leaves under constant darkness. We found that PhPRR7, PhPRR5, and PhGI paralogs showed changes in gene structure including exon number and deletions of CCT domain of the PRR family. Our results revealed that petunia petals presented a specialized clock.

journal_name

Genes (Basel)

journal_title

Genes

authors

Terry MI,Carrera-Alesina M,Weiss J,Egea-Cortines M

doi

10.3390/genes10110860

subject

Has Abstract

pub_date

2019-10-30 00:00:00

issue

11

issn

2073-4425

pii

genes10110860

journal_volume

10

pub_type

杂志文章

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