PIF7 is a master regulator of thermomorphogenesis in shade

0562358 - ÚEB 2023 RIV GB eng J - Journal Article
Burko, Y. - Willige, B. C. - Seluzicki, A. - Novák, Ondřej - Ljung, K. - Chory, J.
PIF7 is a master regulator of thermomorphogenesis in shade.
Nature Communications. Roč. 13, č. 1 (2022), č. článku 4942. E-ISSN 2041-1723
Institutional support: RVO:61389030
Keywords : MEDIATED HYPOCOTYL ELONGATION * PHYTOCHROME-B * GROWTH-RESPONSES
OECD category: Plant sciences, botany
Impact factor: 16.6, year: 2022
Method of publishing: Open access
https://doi.org/10.1038/s41467-022-32585-6

The size of plant organs is highly responsive to environmental conditions. The plant’s embryonic stem, or hypocotyl, displays phenotypic plasticity, in response to light and temperature. The hypocotyl of shade avoiding species elongates to outcompete neighboring plants and secure access to sunlight. Similar elongation occurs in high temperature. However, it is poorly understood how environmental light and temperature cues interact to effect plant growth. We found that shade combined with warm temperature produces a synergistic hypocotyl growth response that dependent on PHYTOCHROME-INTERACTING FACTOR 7 (PIF7) and auxin. This unique but agriculturally relevant scenario was almost totally independent on PIF4 activity. We show that warm temperature is sufficient to promote PIF7 DNA binding but not transcriptional activation and we demonstrate that additional, unknown factor/s must be working downstream of the phyB-PIF-auxin module. Our findings will improve the predictions of how plants will respond to increased ambient temperatures when grown at high density.
Permanent Link: https://hdl.handle.net/11104/0334701