Circadian rhythms in plants

Definition

Circadian rhythms are observable biological oscillations that occur with a 24-hour periodicity. They are based on an endogenous transcriptional clock, which itself is reinforced by environmental cues such as variations in light and temperature.

Latest Research and Reviews

  • Research | | open

    The plant circadian clock regulates numerous developmental processes such as seasonal growth and flowering time. Here Ritter et al. identify two transcription factors, FRS7 and FRS12, which interact to form a repressor complex that regulates clock output partially by controlling the expression of GIGANTEA and PIF4.

    • Andrés Ritter
    • , Sabrina Iñigo
    • , Patricia Fernández-Calvo
    • , Ken S. Heyndrickx
    • , Stijn Dhondt
    • , Hua Shi
    • , Liesbeth De Milde
    • , Robin Vanden Bossche
    • , Rebecca De Clercq
    • , Dominique Eeckhout
    • , Mily Ron
    • , David E. Somers
    • , Dirk Inzé
    • , Kris Gevaert
    • , Geert De Jaeger
    • , Klaas Vandepoele
    • , Laurens Pauwels
    •  & Alain Goossens
  • Research | | open

    The plant-specific GIGANTEA protein regulates the circadian clock by stabilizing the F-box protein ZEITLUPE via an unknown mechanism. Here Cha et al. show that GIGANTEA has intrinsic chaperone activity and can facilitate ZEITLUPE maturation by acting synergistically with HSP90.

    • Joon-Yung Cha
    • , Jeongsik Kim
    • , Tae-Sung Kim
    • , Qingning Zeng
    • , Lei Wang
    • , Sang Yeol Lee
    • , Woe-Yeon Kim
    •  & David E. Somers
  • Research | | open

    The Arabidopsis CCA1 transcription factor is a core regulator of the circadian clock. Here, the authors show that the LWD1 protein, in complex with the TCP20 or TCP22 transcription factors, acts as a co-activator of CCA1 expression contributing to elevated CCA1 expression at dawn.

    • Jing-Fen Wu
    • , Huang-Lung Tsai
    • , Ignasius Joanito
    • , Yi-Chen Wu
    • , Chin-Wen Chang
    • , Yi-Hang Li
    • , Ying Wang
    • , Jong Chan Hong
    • , Jhih-Wei Chu
    • , Chao-Ping Hsu
    •  & Shu-Hsing Wu
  • Reviews |

    The plant circadian clock regulates many physiological processes, such as growth, flowering time, abiotic and biotic stress responses, and metabolism. In turn, many of these responses feed back to control the circadian clock. This Review describes the integration of circadian dynamics into the study of plant physiological processes and highlights the importance of incorporating circadian, spatial and temporal information into predictive models to improve crop breeding.

    • Kathleen Greenham
    •  & C. Robertson McClung

News and Comment