Abstract
Plants growing at high density are in constant competition for light with each other. The shade avoidance syndrome (SAS) is an effective way to escape neighboring vegetation. Even though the molecular mechanisms regulating SAS have been long studied, interactions between light and other environmental signaling pathways have only recently received attention. Under natural conditions, plants deal with multiple stresses simultaneously. It is, therefore, key to identify commonalities, distinctions, and interactions between plant responses to different environmental cues. This review outlines the current understanding of the interplay between canopy light signaling and other stresses, both biotic and abiotic. Understanding plant responses to multiple stimuli, factoring in the dominance of light for plant life, is essential to generate crops with increased resilience against climate change.
Highlights
Global warming and overall climate change are major factors influencing plant life and fitness on the planet
shade avoidance syndrome (SAS) response is constituted of rapid hypocotyl, internode, and petiole elongation as well as upward movement of leaves, apical dominance and early flowering in Arabidopsis (Casal, 2012; Roig-Villanova and Martınez-Garcıa, 2016)
SHADE AVOIDANCE INTERACTS WITH ABIOTIC STRESS RESPONSES Global food security is continuously threatened by weather fluctuations that can lead to drought or flooding events that severely affect crop yield
Summary
Global warming and overall climate change are major factors influencing plant life and fitness on the planet. We discuss how responses to biotic stresses, covering both pathogenic and beneficial plant-microbe interactions, are modulated by density light signals. SHADE AVOIDANCE INTERACTS WITH ABIOTIC STRESS RESPONSES Global food security is continuously threatened by weather fluctuations that can lead to drought or flooding events that severely affect crop yield.
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