Molecular basis of flowering under natural long-day conditions in Arabidopsis.


Plants sense light and temperature changes to regulate flowering time. Here, we show that expression of the Arabidopsis florigen gene, FLOWERING LOCUS T (FT), peaks in the morning during spring, a different pattern than we observe in the laboratory. Providing our laboratory growth conditions with a red/far-red light ratio similar to open-field conditions and daily temperature oscillation is sufficient to mimic the FT expression and flowering time in natural long days. Under the adjusted growth conditions, key light signalling components, such as phytochrome A and EARLY FLOWERING 3, play important roles in morning FT expression. These conditions stabilize CONSTANS protein, a major FT activator, in the morning, which is probably a critical mechanism for photoperiodic flowering in nature. Refining the parameters of our standard growth conditions to more precisely mimic plant responses in nature can provide a powerful method for improving our understanding of seasonal response.


PubMed ID: 30250277

Projects: Regulation of flowering time in natural conditions

Publication type: Not specified

Journal: Nat Plants

Citation: Nat Plants. 2018 Oct;4(10):824-835. doi: 10.1038/s41477-018-0253-3. Epub 2018 Sep 24.

Date Published: 27th Sep 2018

Registered Mode: Not specified

Authors: Y. H. Song, A. Kubota, M. S. Kwon, M. F. Covington, N. Lee, E. R. Taagen, D. Laboy Cintron, D. Y. Hwang, R. Akiyama, S. K. Hodge, H. Huang, N. H. Nguyen, D. A. Nusinow, A. J. Millar, K. K. Shimizu, T. Imaizumi

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Created: 3rd May 2019 at 20:10

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