Abstract
AbstractThe 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.
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary
Reference87 articles.
1. Casal, J. J. Shade avoidance. Arabidopsis Book 10, e0157 (2012).
2. Ballare, C. L., Sanchez, R. A., Scopel, A. L., Casal, J. J. & Ghersa, C. M. Early detection of neighbour plants by phytochrome perception of spectral changes in reflected sunlight. Plant, Cell Environ. 10, 551–557 (1987).
3. Ballare, C. L., Scopel, A. L. & Sanchez, R. A. Far-red radiation reflected from adjacent leaves: an early signal of competition in plant canopies. Science 247, 329–332 (1990).
4. Smith, H. & Whitelam, G. C. The shade avoidance syndrome: multiple responses mediated by multiple phytochromes. Plant, Cell Environ. 20, 840–844 (1997).
5. Casal, J. J. & Balasubramanian, S. Thermomorphogenesis. Annu. Rev. Plant Biol. 70, 321–346 (2019).
Cited by
44 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献