Dance of plants with circadian clock
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Endogenous oscillator called circadian clock controls many physiological aspects. Since the identification of <i>LATE ELONGATED HYPOCOTYL</i> (<i>LHY</i>) and <i>CIRCADIAN CLOCK ASSOCIATED 1</i> (<i>CCA1</i>) genes as the 1st candidates for clock components in plants, many clock-associated genes have been identified in <i>Arabidopsis</i> and other plant species. The 1st negative feedback model composed of LHY, CCA1 and TIMING OF CAB EXPRESSION 1 (TOC1) has recently been modified based on possible functions of new players. Photoperiodic flowering is controlled by clock and our knowledge on molecular mechanisms underlying the clock-controlled process has much advanced in this decade. Recently, we have started to understand how the clock regulates organ movements and elongations in a model plant, <i>Arabidopsis</i>. In this short review, i) a history of construction of models on circadian rhythms in <i>Arabidopsis</i>, ii) modified models on circadian system in <i>Arabidopsis</i>, iii) recent progress on understanding molecular mechanisms underlying organ movements controlled by a circadian clock and iv) advantages of using tomato as a model system for chronobiology are summarized and discussed.
- Plant tissue culture letters
Plant tissue culture letters 24(1), 87-97, 2007-03-01
Japanese Society for Plant Cell and Molecular Biology