A mobile auxin signal connects temperature sensing in cotyledons with growth responses in hypocotyls

J. Bellstaedt, J. Trenner, R. Lippmann, Y. Poeschl, X. Zhang, J. Friml, M. Quint, C. Delker, Plant Physiology 180 (2019) 757–766.


Journal Article | Published | English
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Abstract
Plants have a remarkable capacity to adjust their growth and development to elevated ambient temperatures. Increased elongation growth of roots, hypocotyls and petioles in warm temperatures are hallmarks of seedling thermomorphogenesis. In the last decade, significant progress has been made to identify the molecular signaling components regulating these growth responses. Increased ambient temperature utilizes diverse components of the light sensing and signal transduction network to trigger growth adjustments. However, it remains unknown whether temperature sensing and responses are universal processes that occur uniformly in all plant organs. Alternatively, temperature sensing may be confined to specific tissues or organs, which would require a systemic signal that mediates responses in distal parts of the plant. Here we show that Arabidopsis (Arabidopsis thaliana) seedlings show organ-specific transcriptome responses to elevated temperatures, and that thermomorphogenesis involves both autonomous and organ-interdependent temperature sensing and signaling. Seedling roots can sense and respond to temperature in a shoot-independent manner, whereas shoot temperature responses require both local and systemic processes. The induction of cell elongation in hypocotyls requires temperature sensing in cotyledons, followed by generation of a mobile auxin signal. Subsequently, auxin travels to the hypocotyl where it triggers local brassinosteroid-induced cell elongation in seedling stems, which depends upon a distinct, permissive temperature sensor in the hypocotyl.
Publishing Year
Date Published
2019-06-01
Journal Title
Plant Physiology
Volume
180
Issue
2
Page
757-766
IST-REx-ID

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Bellstaedt J, Trenner J, Lippmann R, et al. A mobile auxin signal connects temperature sensing in cotyledons with growth responses in hypocotyls. Plant Physiology. 2019;180(2):757-766. doi:10.1104/pp.18.01377
Bellstaedt, J., Trenner, J., Lippmann, R., Poeschl, Y., Zhang, X., Friml, J., … Delker, C. (2019). A mobile auxin signal connects temperature sensing in cotyledons with growth responses in hypocotyls. Plant Physiology, 180(2), 757–766. https://doi.org/10.1104/pp.18.01377
Bellstaedt, Julia, Jana Trenner, Rebecca Lippmann, Yvonne Poeschl, Xixi Zhang, Jiří Friml, Marcel Quint, and Carolin Delker. “A Mobile Auxin Signal Connects Temperature Sensing in Cotyledons with Growth Responses in Hypocotyls.” Plant Physiology 180, no. 2 (2019): 757–66. https://doi.org/10.1104/pp.18.01377.
J. Bellstaedt et al., “A mobile auxin signal connects temperature sensing in cotyledons with growth responses in hypocotyls,” Plant Physiology, vol. 180, no. 2, pp. 757–766, 2019.
Bellstaedt J, Trenner J, Lippmann R, Poeschl Y, Zhang X, Friml J, Quint M, Delker C. 2019. A mobile auxin signal connects temperature sensing in cotyledons with growth responses in hypocotyls. Plant Physiology. 180(2), 757–766.
Bellstaedt, Julia, et al. “A Mobile Auxin Signal Connects Temperature Sensing in Cotyledons with Growth Responses in Hypocotyls.” Plant Physiology, vol. 180, no. 2, ASPB, 2019, pp. 757–66, doi:10.1104/pp.18.01377.

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