Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers
Online ISSN : 2185-789X
Print ISSN : 1344-4905
ISSN-L : 1344-4905
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Collective Synchronization of Circadian Rhythms in Germinating Plants by Temperature Fluctuations
Ryuta UDOShogo MORIYUKIKazuya UKAIHirokazu FUKUDA
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2014 Volume 31 Issue 3 Pages 359-365

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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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© 2014 Japan Society of Refrigerating and Air Conditioning Engineers
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