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A fast circadian clock at high temperatures is a conserved feature across A rabidopsis accessions and likely to be important for vegetative yield
Author(s) -
KUSAKINA JELENA,
GOULD PETER D.,
HALL ANTHONY
Publication year - 2014
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.12152
Subject(s) - circadian clock , circadian rhythm , biology , bacterial circadian rhythms , arabidopsis , photoperiodism , period (music) , oscillating gene , endogeny , microbiology and biotechnology , yield (engineering) , botany , genetics , neuroscience , mutant , endocrinology , gene , physics , materials science , acoustics , metallurgy
The circadian clock is an endogenous 24 h oscillator regulating many critical biological processes in plants. One of the key characteristics of the circadian clock is that it is buffered against temperature, maintaining an approximately 24 h rhythm over a broad physiological temperature range. Here, we tested temperature‐buffering capacity of the circadian clock across a number of A rabidopsis accessions using several circadian clock reporters: leaf movement, CCA1 : LUC and LHY : LUC . We found that leaf movement was the best temperature buffered circadian output. On the other hand, when temperature increases, circadian rhythms of CCA1 and LHY transcription shorten considerably across all accessions, indicating that the clock driving expression of CCA1 and LHY is not perfectly buffered. This feature might be crucial to plants growing in a constantly changing environment, and here, we provide insight into the importance of period shortening to plant growth performance and the benefits of a flexible clock.