Oscillator networks with tissue-specific circadian clocks in plants. (November 2018)

• Record Type: Journal Article
• Authors: Inoue, Keisuke; Araki, Takashi; Endo, Motomu
• Is Part Of: Seminars in cell & developmental biology. Volume 83(2018)
• Page Start: 78
• Page End: 85
• Publication Date: 2018-11
• Subjects: CAT3 catalase 3 -- CHE CCA1 hiking expedition -- CHS chalcone synthase -- CAB chlorophyll a/b binding protein -- CCA1 circadian clock associated 1 -- CLK clock -- CCR2 cold-circadian rhythm-RNA binding2 -- CO constans -- COP1 constitutive photomorphogenic 1 -- CYC cycle -- cry cryptochrome -- ELF early flowering -- EC evening complex -- FT flowering locus T -- GI gigantea -- LHY late elongated hypocotyl -- LUX LUX arrythmo -- miRNA microRNA -- OPA odd paired -- PHY phytochrome -- PIF phytochrome interacting factor -- PRR pseudo-response regulator -- SRP serpent -- SPA suppressor of phyA-105 -- SCN suprachiasmatic nucleus -- TOC1 timing of cab expression 1; Circadian clock -- Tissue specificity -- Hierarchical coupling; Cytology -- Periodicals; Developmental biology -- Periodicals; 571.6
• DOI: 10.1016/j.semcdb.2017.09.002
• Languages: English
• ISSNs: 1084-9521

Abstract

Abstract: Many organisms rely on circadian clocks to synchronize their biological processes with the 24-h rotation of the earth. In mammals, the circadian clock consists of a central clock in the suprachiasmatic nucleus and peripheral clocks in other tissues. The central clock is tightly coupled to synchronize rhythmicity and can organize peripheral clocks through neural and hormonal signals. In contrast to mammals, it has long been assumed that the circadian clocks in each plant cell is able to be entrained by external light, and they are only weakly coupled to each other. Recently, however, several reports have demonstrated that plants have unique oscillator networks with tissue-specific circadian clocks. Here, we introduce our current view regarding tissue-specific properties and oscillator networks of plant circadian clocks. Accumulating evidence suggests that plants have multiple oscillators, which show distinct properties and reside in different tissues. A direct tissue-isolation technique and micrografting have clearly demonstrated that plants have hierarchical oscillator networks consisting of multiple tissue-specific clocks.