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Shade avoidance responses become more aggressive in warm environments
Author(s) -
RomeroMontepaone Sofía,
Poodts Sofía,
Fischbach Patrick,
Sellaro Romina,
Zurbriggen Matias D.,
Casal Jorge J.
Publication year - 2020
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.13720
Subject(s) - shade avoidance , cryptochrome , environmental science , irradiance , growth rate , atmospheric sciences , nutrient , biology , greenhouse , limiting , amplitude , ecology , arabidopsis thaliana , botany , mathematics , neuroscience , physics , circadian rhythm , engineering , biochemistry , circadian clock , geometry , quantum mechanics , gene , mutant , mechanical engineering
Abstract When exposed to neighbour cues, competitive plants increase stem growth to reduce the degree of current or future shade. The aim of this work is to investigate the impact of weather conditions on the magnitude of shade avoidance responses in Arabidopsis thaliana . We first generated a growth rate database under controlled conditions and elaborated a model that predicts daytime hypocotyl growth as a function of the activity of the main photosensory receptors (phytochromes A and B, cryptochromes 1 and 2) in combination with light and temperature inputs. We then incorporated the action of thermal amplitude to account for its effect on selected genotypes, which correlates with the dynamics of the growth‐promoting transcription factor PHYTOCHROME‐INTERACTING FACTOR 4. The model predicted growth rate in the field with reasonable accuracy. Thus, we used the model in combination with a worldwide data set of current and future whether conditions. The analysis predicted enhanced shade avoidance responses as a result of higher temperatures due to the geographical location or global warming. Irradiance and thermal amplitude had no effects. These trends were also observed for our local growth rate measurements. We conclude that, if water and nutrients do not become limiting, warm environments enhance the shade avoidance response.