Analysis of the circadian clock and its role in scent emission in Antirrhinum majus and Petunia hybrida
type: CreativeWork
description: [ENG] Organisms are adapted to cyclic environmental changes, such as tidals, day-night alternance or seasonality. An innate timing device that registers these changes is called biological clock. Circadian clocks are comprised of interlocked regulatory loops of genes and proteins. Anticipation to periodic changes allows organisms to adapt their secondary metabolism, growth or reproduction. In plants, the simplest model found to date is the picoalga Ostreococcus tauri, which has only two clock genes: CIRCANDIAN CLOCK ASSOCIATED 1 and TIMING OF CAB EXPRESSION 1. The analysis of species as Arabidopsis thaliana revealed the existence of a more complex net of clock elements, including the PSEUDO-RESPONSE REGULATORS family, the evening complex and the blue light receptors ZEITLUPE and FLAVIN KELCH F-BOX PROTEIN 1, among others. An example of a character controlled by the circadian clock in flowering plants is scent emission, which shows a daily pattern even under constant light or dark conditions, a characteristic feature of processes controlled by the circadian clock. Although the volatile biosynthesis has been widely characterized, the regulation by the integration of external cues, such as light or temperature, is still poorly understood. In the present work we followed two approaches in order to get a better understanding about circadian clock structure and processes controlled by the circadian clock. First, we characterized and compared the structure of circadian clock genes in leaves and petals of petunia (Petunia hybrida) under two different light conditions. We show that the clock genes PSEUDO RESPONSE REGULATOR 7, 5 and GIGANTEA are duplicated in petunia and that the gene expression patterns differ in leaves and petals with most genes peaking during the light phase in leaves and during the dark phase in petals. One of the petunia duplicated paralogs PaxiNPRR5a from P.axillaris and PinfSPRR5a from P.inflata have lost the canonical repression domain indicating a dep…
abstract: [ENG] Organisms are adapted to cyclic environmental changes, such as tidals, day-night alternance or seasonality. An innate timing device that registers these changes is called biological clock. Circadian clocks are comprised of interlocked regulatory loops of genes and proteins. Anticipation to periodic changes allows organisms to adapt their secondary metabolism, growth or reproduction. In plants, the simplest model found to date is the picoalga Ostreococcus tauri, which has only two clock genes: CIRCANDIAN CLOCK ASSOCIATED 1 and TIMING OF CAB EXPRESSION 1. The analysis of species as Arabidopsis thaliana revealed the existence of a more complex net of clock elements, including the PSEUDO-RESPONSE REGULATORS family, the evening complex and the blue light receptors ZEITLUPE and FLAVIN KELCH F-BOX PROTEIN 1, among others. An example of a character controlled by the circadian clock in flowering plants is scent emission, which shows a daily pattern even under constant light or dark conditions, a characteristic feature of processes controlled by the circadian clock. Although the volatile biosynthesis has been widely characterized, the regulation by the integration of external cues, such as light or temperature, is still poorly understood. In the present work we followed two approaches in order to get a better understanding about circadian clock structure and processes controlled by the circadian clock. First, we characterized and compared the structure of circadian clock genes in leaves and petals of petunia (Petunia hybrida) under two different light conditions. We show that the clock genes PSEUDO RESPONSE REGULATOR 7, 5 and GIGANTEA are duplicated in petunia and that the gene expression patterns differ in leaves and petals with most genes peaking during the light phase in leaves and during the dark phase in petals. One of the petunia duplicated paralogs PaxiNPRR5a from P.axillaris and PinfSPRR5a from P.inflata have lost the canonical repression domain indicating a dep…
author: Terry López, Marta Isabel
keywords: Botánica, Olor de las flores, Polinizadores, Genética, Reloj circadiano, Perfumes, Botany, Floriculture, Pollination, Plant genetics, Circadian clock, Floral scent
date published: 2020
date modified: 2026-07-24T05:39:34Z
provider: Universidad Politécnica de Cartagena
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Universidad Politécnica de Cartagena

PropertyValue
property ID: DOI
value: 10.31428/10317/8833