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. 2019 Jul 19;9:10485. doi: 10.1038/s41598-019-47019-5

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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IR thermal radiation influences the phytochrome-mediated photothermal morphogenesis. (a) Thermal kinetics of the Pfr-to-Pr conversion. The IR spectral irradiance values in Table 1 were used to calculate the half-life (t_1/2) of Pfr at different temperatures. The t_1/2 of Pfr at 22 °C was set to 1. (b) Estimation of Pr/Pfr ratios during dark reversion. (c) IR control of the phyABCDE hypocotyl growth. The Arabidopsis seedlings were grown under short days for 7 d at different temperatures. The R/IR ratio at 22 °C was set to 1. (d) IR-insensitive hypocotyl phenotype of Arabidopsis seedlings overexpressing a constitutively active phyB (YHB). Seedlings were grown as described in (c). The R/IR ratio at 22 °C was set to 1. (e) Effects of IR radiation on the hypocotyl growth of chromophore-defective hy1 mutant. Seedlings were grown under short days for 7 d at different temperatures. The R/IR ratio at 22 °C was set to 1.