Collective Synchronization of Circadian Rhythms in Germinating Plants by Temperature Fluctuations

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  • UDO Ryuta
    Department of Mechanical Engineering, Graduated School of Engineering, Osaka Prefecture University
  • MORIYUKI Shogo
    Department of Mechanical Engineering, Graduated School of Engineering, Osaka Prefecture University
  • UKAI Kazuya
    Department of Mechanical Engineering, Graduated School of Engineering, Osaka Prefecture University
  • FUKUDA Hirokazu
    Department of Mechanical Engineering, Graduated School of Engineering, Osaka Prefecture University

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Other Title
  • 温度変動が誘起する発芽期における概日リズムの集団同期
  • オンド ヘンドウ ガ ユウキ スル ハツガキ ニ オケル ガイジツ リズム ノ シュウダン ドウキ

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Abstract

Enlarging plant factory increases the risk of inhomogeneous distribution and fluctuation in temperature. This is why a research about quantification of the effect of temperature fluctuation is required focusing on high temperature-sensitivity of plant. In this study we quantified temperature-sensitivity of lettuce in the germination using synchronization index of circadian rhythms as an index. We used transgenic Greenwave lettuce (AtCCA1 :LUC) and analyzed the synchronization rate of circadian rhythms among individuals by measuring circadian rhythm of the lettuce in germination. It was revealed that circadian rhythms synchronized among individuals by temperature changes with diurnal fluctuation and rapidly decreasing. These results indicate that plant circadian clock has high temperature-sensitivity. Therefore plant factory is required accurate temperature control when we perform monitoring and selection of seedling based on measurement of circadian clock.

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